CN105473249A - Processing unit and processing device - Google Patents

Abstract

The invention provides a machining unit (10) for machining a rod-shaped member (W). The processing unit (10) includes: a first unit (23), which has a first split mold part on the upper side of the upper and lower pair of split mold parts and a first clamping part on the upper side of the upper and lower pair of clamping parts, The upper and lower pair of split mold parts have a bending groove for bending the rod-shaped member (W), and the upper and lower pair of clamping parts are used to hold the rod-shaped member inserted into the bending groove; the second unit (22) includes The second parting mold part of the lower side of the upper and lower pair of parting mold parts and the second clamping part of the lower side of the upper and lower pair of clamping parts; the pressing part (30), which has a The side holds the rod-shaped member in the holding groove of the bending groove; and the opening and closing unit (69), which is used to make the first unit (23), the second unit (22) and the pressure piece (30) relative to the The setting center (C) of the position of the central axis of the rod-shaped member (W) in the groove state opens and closes in three different directions.

Description

Processing units and processing devices

technical field

The present invention relates to a unit and an apparatus for bending rod-shaped members such as metal pipes and pipes.

Background technique

Japanese Patent Laying-Open No. 11-138215 discloses that there is provided a pipe bender in which the structure of a bending die and a holding die is simplified and smaller than conventional ones. In the pipe bender of this document, the bending dies supported on the upper part of the rotating shaft are configured by axially separable split dies, and half parts of the clamping dies are integrally formed on these split dies. The pipe to be bent is fed between the clamping dies separated from the split die, and the pipe is clamped to the clamping die by the clamping of the split die. After that, the bending die is rotated together with the rotating shaft, and the structure is bent along the guide of the groove formed on the outer periphery of the bending die.

Japanese Unexamined Patent Publication No. 2003-305518 discloses that a pipe bending unit of a pipe bending apparatus which is compact and easy to control is provided. The processing unit of this document is a pipe bending processing unit of a pipe bending processing device, which includes a bending roller, a jig for fixing the pipe to the bending roller, and moves the pipe along the bending roller while pressing the pipe to the bending roller. As for the pressurizing member for bending the pipe, the pipe bending unit of the pipe bending apparatus is characterized in that the jig is supported in such a manner as to be able to contact and separate from the bending roller, and a device for defining the pressurizing member is provided. The fixed plate of the cam for the pressing member of the moving track supports the pressing member so as to be able to contact and separate from the bending roller, and the rotating plate having the cam for the clamp for moving the clamp is arranged, and is used These cams operate the clamps and the presser.

Contents of the invention

A device that can more efficiently process rod-shaped members such as pipes and tubes is sought.

A technical solution of the present invention is a processing unit, which includes: a pair of upper and lower parting mold parts, which contain bending grooves for bending the rod-shaped member; a rod-shaped member of the groove; and a pressing member including a holding groove for holding the rod-shaped member in the curved groove from the outer peripheral side of the curved groove. The processing unit includes: the first unit, which includes the first split mold part on the upper side of the upper and lower pair of split mold parts and the first clamping part on the upper side of the upper and lower pair of clamping parts; the second unit, which includes The second split mold part on the lower side of the upper and lower pair of split mold parts and the second clamping part on the lower side of the upper and lower pair of clamping parts; and the opening and closing unit for making the first unit and the second unit And the pressing member opens and closes in three different directions with respect to the set center which is the position of the center axis of the rod-shaped member in the state of being mounted in the bending groove.

By opening the first unit, the second unit, and the presser in three different directions, the first unit, the second unit, and the presser all move to positions where a certain distance from the set center is ensured. Therefore, it becomes easy to approach the setting center, and the rod-shaped member, such as a workpiece such as a pipe or a pipe, can be held at the position where the rod-shaped member is held for bending, that is, the simple path for setting the center is typically linear. path in and out. Therefore, the time required for installation of the rod-shaped member can be shortened, and the work time required for bending can be shortened. In particular, in the case where multiple bending processes are required in order to make a rod-shaped member into a finished product, the number of times of replacement increases, but by shortening the time required for replacement, the processing time (manufacturing time) including bending can be shortened. ).

Desirably, the opening and closing unit includes: a first opening and closing unit (balanced opening and closing unit) for opening and closing the first and second units equally (balanced); and a second opening and closing unit for In conjunction with the first opening and closing unit, the pressing member is moved away from or close to the set center. The second opening and closing unit may be a link unit that synchronously opens and closes the pressing member by the movement of the first opening and closing unit. The driving mechanism and control of the pressing member can be simplified.

The second opening and closing unit may also include: a skirt-shaped cylindrical cam that moves up and down in conjunction with the first opening and closing unit; and a cam follower that moves while contacting the peripheral surface of the skirt-shaped cylindrical cam, The skirt-shaped cylindrical cam moves up and down to open and close the pressing piece relative to the curved groove in conjunction with the opening and closing of the first unit and the second unit. When the first unit and the second unit are closed when the skirt-shaped cylindrical cam moves upward, the skirt-shaped cylindrical cam narrows in the first direction and the second direction (up-down direction). Since the bending reaction force of the press member can be received by the skirt-shaped cylindrical cam, it is possible to omit a driving member and energy for maintaining the press member in the mold-closed state.

The first opening and closing unit may also include a first opening and closing shaft for moving the first unit up and down, a second opening and closing shaft for moving the second unit up and down, a first opening and closing shaft and a second opening and closing shaft for moving the second unit up and down. The closing shaft is a left and right screw member which moves in opposite directions up and down, and an opening and closing motor for rotating the left and right screw member. It is possible to provide a mechanism that opens and closes the first unit, the second unit, and the presser in three directions with one opening and closing motor.

The second opening and closing unit may also include a holder that supports the pressing member in such a manner that the pressing member swings relative to the first opening and closing shaft and the second opening and closing shaft, and a holder that can be opened and closed relative to the first opening and closing shaft and the second opening and closing shaft. The support portion of the holder supports the holder in a rotatable manner. By supporting the arm for swinging the pressurizing member with the first opening and closing shaft and the second opening and closing shaft, the reaction force of the swinging of the pressurizing member can be received near the first unit and the second unit, and the first unit can be used , the second unit, and the presser more reliably hold the rod-shaped member as the workpiece.

The pressing member may also include a pressing roller including a retaining groove having an arcuate portion, and the processing unit has a first unit that rotates around the first axis in a state where the first unit and the second unit are closed. The drive unit and the second drive unit independently rotate around the first axis relative to the first drive unit in a state in which the pressing member is closed. It is possible to perform stretch bending on the left and right sides by using a jig, and to perform press bending on the other right and left side by rotating the pressing member. The upper and lower pair of clamping parts may also be a shared clamping part provided with clamping grooves intersecting in the shape of a letter X. It is possible to process rod-shaped members in four modes of left and right press bending and stretch bending.

In addition, the pressurizing member may include a pressurizing member arranged at least one of two places on the left and right. That is, the pressurizer may include left and right pressurizers arranged at two places on the left and right, or a single-side pressurizer arranged at any one of them. The second drive unit can also open and close any one of the left and right pressurizers or a single pressurizer. Stretch bending on the left and right or stretch bending on either side is possible. An example of the second drive unit for driving the left and right pressing elements includes left and right opening and closing cams for respectively opening and closing the left and right pressing elements, and an opening and closing cam for closing any one of the left and right opening and closing cams. Inclined cylindrical cam that rotates around the first axis.

Another technical solution of the present invention is a processing device, wherein, the processing device includes: the above-mentioned processing unit; a workpiece supporting unit, which is used to support a rod-shaped member; and a moving unit, which is used to make the processing unit and the workpiece supporting unit At least one of them moves to perform the first action of setting the central axis of the unprocessed part of the rod-shaped member supported by the workpiece support unit at the set center of the machining unit and the retraction of setting the central axis at a distance from the set center. The 2nd action of the position. Since the presser and the first unit and the second unit for holding the rod-shaped member can be opened and closed in three directions, the moving unit can make the central axis of the unprocessed part of the rod-shaped member supported by the workpiece support unit in the Relatively move linearly between the setting center and the withdrawn position. Therefore, processing time can be shortened.

Desirably, the moving unit relatively moves the central axis of the unprocessed portion of the rod-shaped member supported by the workpiece supporting unit in a first direction, for example, a vertical direction, so that the opening and closing directions of the first unit and the second unit are relative to each other. The processing unit is supported in an inclined manner in the vertical direction. The relative motion of the rod-shaped member to be processed can be simplified, and a processing device with a simple structure can be provided.

When the processing unit includes a mechanism for bending the rod-shaped member to either side of the left and right, the moving unit includes a first moving unit for swinging the processing unit to the left and right while moving the processing unit up and down. The machining unit can be installed corresponding to the initial position of the left and right bending. The first moving unit includes, for example: a base; a holder, which swings relative to the base; a sliding plate, which supports the processing unit by sliding up and down in the holder; Vertical direction; the second cam groove, which is provided on the sliding plate, is in a direction perpendicular to the direction in which the sliding plate slides; the rotating gear, which has a rotating roller that moves inside the first cam groove and the second cam groove; and The rotary motor, which is held by the holder, is used to drive the rotary gear to rotate the rotary gear. By moving the rotation gear with the rotation motor, the sliding plate can be moved up and down and swing left and right. Therefore, the processing unit supported by the sliding plate can be swung to the left and right while moving up and down, and the setting center where the rod-shaped member is installed can be moved to the initial position where the rod-shaped member is bent to the left and right.

The processing device may include a processing unit and a torsion unit that supports the processing unit so as to rotate about a second axis passing through a set center. The torsion unit includes: a torsion gear, which is ring-shaped, used to support the processing unit, and has a first cutout portion formed by partially cutting toward the center; a torsion drive unit, which is used to drive the torsion gear; a plurality of guide rollers, which are torsion The gear supports the outer peripheral surface of the torsion gear so as to rotate about the second axis, and the support means supports the plurality of guide rollers. The supporting unit of the processing device may also include: a second opening, centered on the second axis, larger than the first opening in the ring of the torsion gear; The processing device is open in the cross direction, and the processing device is provided with a plurality of guide rollers facing the second opening, and supports at least a part of the torsion gear so that at least a part of the torsion gear rotates in the second opening. It is possible to provide a processing device that does not have a torsion shaft type rotation mechanism and has a short unbendable area.

In addition, the processing device may include: a chuck unit that supports the unprocessed portion of the rod-shaped member on the side opposite to the processing unit through the support unit along the second axis; and a conveying unit that relatively controls the chuck unit. and the distance between the support unit. The chuck unit may have a workpiece gripping portion extending along the second axis, and the workpiece gripping portion penetrates the first opening when the distance between the support unit and the chuck unit is close.

Still another different aspect of the present invention is a method (manufacturing method, control method) including the step of bending a rod-shaped member using a processing device having a processing unit. The processing unit includes: a pair of upper and lower parting mold parts having a curved groove; a pair of upper and lower clamping parts for holding a rod-shaped member inserted into the curved groove; A holding groove that holds the rod-shaped member in the curved groove. The method includes the steps of: before the bending process, the upper parting mold part and the upper side clamping part, the lower parting mold part and the lower side clamping part and the pressing part are installed on the bending machine. The position of the central axis of the rod-shaped member in the state of the groove is in a state where the set center is opened in three different directions, and the rod-shaped member is relatively linearly moved to be set at the set center.

The installation may also include the step of tilting the processing unit, moving the rod-shaped member linearly, bending left and right, and supplying and discharging in common. In addition, the processing may also include a step of bending the rod-shaped member provided at the set center to the left and right at the set center. Since the moving distance of the rod-shaped member can be shortened, the processing time can be shortened.

It is also possible that, in the processing device having the twisting unit, the rotating unit and the chuck unit, a step is included: before setting, the twisting driving unit rotates the twisting gear so that the first notch and the second notch are aligned; And the installation angle of the rotation unit is set to make the first unit, the second unit and the pressurizing member open and release the direction of the rod-shaped member and the direction of the first notch and the second notch to become a linear installation angle, The installation includes a step of relatively moving the chuck unit and the twist unit in a linear direction, and installing the rod-shaped member on the second axis. It is possible to provide a rotary bending machine (Japanese: Rotary Bender) capable of linearly feeding and discharging rod-shaped members.

In the processing device with the conveying unit, such steps may also be included: before the bending process, the conveying unit makes the distance between the support unit and the chuck unit close, and the workpiece gripping part penetrates the second opening; In the case of a rod-shaped member, the conveyance unit separates the distance between the support unit and the chuck unit, and the workpiece gripping unit grips the rod-shaped member again. Even the central portion of the rod-shaped member can be bent by changing the grip of the rod-shaped member.

Description of drawings

FIG. 1 is a front view showing the outline of a processing apparatus.

Fig. 2 is a side view showing the outline of the processing device.

FIG. 3 is a diagram showing the outline of a processing unit.

Fig. 4 is a cross-sectional view showing a schematic configuration of a processing unit.

5 is a diagram showing the opening and closing of the upper and lower molds and pressure rollers. (a) of FIG. 5 is a diagram showing the mold-opening state, (b) of FIG. ) is a diagram showing a state of movement for left-hand bending, and (d) of FIG. 5 is a diagram showing a state of movement for right-hand bending.

Fig. 6 is a diagram illustrating the outline of a bending die jig, and Fig. 6(a) is an enlarged top view viewed from above with the bending die jig at the center, and Fig. 6(b) is viewed from the direction of the clamping groove using 6( c ) is a view of a state in which the workpiece is held by the second gripping groove viewed from the direction of the second gripping groove.

Fig. 7 is a figure showing the structure of the lower die of the bending die clamp, Fig. 7(a) is a top view, Fig. 7(b) is a side view in the direction of extension of the clamping groove, Fig. 7(c) is a second Side view of the elongated direction of the clamping groove.

Fig. 8 is a top view showing an example of the bending process of the machining unit, Fig. 8(a) is a diagram showing left-hand bending, Fig. 8(b) is a diagram showing right-hand bending, and Fig. 8(c) is a diagram showing In the diagram of left-hand buckling, FIG. 8( d ) is a diagram showing right-hand buckling.

Fig. 9 is a diagram showing the structure and motion of the moving unit, Fig. 9 (a) and Fig. 9 (d) are diagrams showing a state in which the processing unit is set to a left bending state, Fig. 9 (b) and Fig. 9 (e) is a figure which shows the state which moved the processing unit downward, and FIG. 9(c) and FIG. 9 (f) are figures which show the state which set the processing unit in the right-curved state.

Fig. 10 is a diagram further showing the structure of the mobile unit, Fig. 10(a) is a horizontal sectional view, and Fig. 10(b) is a vertical sectional view.

Fig. 11 is a flow chart showing the process of machining a workpiece by the machining apparatus.

12 is a plan view showing different processing units, FIG. 12( a ) is a diagram showing a situation of left-hand draw bending, and FIG. 12( b ) is a diagram showing a situation of right-hand press bending.

Fig. 13 is a plan view showing a different processing unit.

Fig. 14 is a side view of the processing unit shown in Fig. 13 .

FIG. 15 is a plan view showing an example of a processing unit including two pressure rollers.

Fig. 16 is a front view showing the outline of a different processing device.

FIG. 17 is a plan view showing the outline of the processing apparatus shown in FIG. 16 .

Fig. 18 is a front view showing the outline of a twisting unit.

Fig. 19 is a schematic sectional view showing a twist unit.

Fig. 20 is a schematic plan view showing a twist unit.

Fig. 21 is a diagram showing a schematic configuration of the chuck unit, in which (a) of Fig. 21 is a front view, and (b) of Fig. 21 is a side view.

Fig. 22 is a flow chart showing the process of machining a workpiece by the machining apparatus shown in Fig. 16 .

Fig. 23 is a front view showing the outline of a different twisting unit.

Fig. 24 is a side view schematically showing the twist unit shown in Fig. 23 .

Fig. 25 is a plan view schematically showing the twist unit shown in Fig. 23 .

Fig. 26 is a plan view showing an outline of a different processing unit.

Fig. 27 is a cross-sectional view showing a schematic configuration of the bending unit shown in Fig. 26 .

Fig. 28 is a diagram showing the opening and closing of the upper and lower molds and the pressure roller, Fig. 28(a) is a diagram showing the mold opening state, and Fig. 28(b) is a diagram showing the mold closing state.

detailed description

FIG. 1 shows the outline of a processing device for bending a rod-shaped member in a front view. An example of a rod-shaped member to be processed (workpiece, workpiece) is a pipe. The processing device 1 includes: a stand 2; a workpiece supporting unit 5 for supporting a pipe as a workpiece W in the horizontal direction; a processing unit 10 for bending the workpiece (processing object) W; a moving unit 80 for It is used to support the processing unit 10 to move up and down relative to the stand 2 ; and the control unit 9 . The control unit 9 includes functions for individually controlling the workpiece supporting unit 5 , the machining unit 10 , and the moving unit 80 . The workpiece W may be a pipe, a tube, or another rod-shaped member.

The workpiece support unit 5 includes: a holder (clamp) 5a for holding the workpiece W in the horizontal direction; and a motor 5b for rotating the holder 5a around an axis (central axis) in the longitudinal direction of the workpiece W. and a moving unit 5c for controlling the distance between the workpiece support unit 5 and the processing unit 10 by moving the workpiece support unit 5 on the stage 2 . The moving unit 5c controls the machining position of the workpiece W in the longitudinal direction. In this example, the moving unit 5c is a horizontal moving unit that moves the workpiece W in the horizontal direction. The workpiece support unit 5 may include means for changing the height of the workpiece W held by the holder 5 a by moving the workpiece support unit 5 up and down on the stage 2 .

The control unit 9 includes a processing position control function (processing position control function) for controlling the relative angle between the processing unit 10 and the workpiece W and the distance between the processing unit 10 and the workpiece support unit 5 by controlling the motor 5b and the horizontal movement unit 5c of the workpiece support unit 5. position control unit) 9a. By changing the relative position or angle between the machining unit 10 and the workpiece support unit 5 , the relative angle between the machining unit 10 and the workpiece W and the distance between the machining unit 10 and the workpiece support unit 5 can be controlled.

The control unit 9 includes a bending processing control unit 9 b for controlling the processing unit 10 to control the bending direction and bending method (tension bending and press bending) of the workpiece W. The processing control unit 9b includes a mode 1 (M1) for left-hand bending, a mode 2 (M2) for right-hand bending, a model 3 (M3) for left-hand bending, and a model 4 (M3) for right-hand bending. M4).

The control unit 9 also includes a gripper control function (clamping control unit) 9c for controlling the machining unit 10 and the moving unit 80 so that the machining unit 10 grips (clamps) or releases (releases) the workpiece W at a predetermined position. The gripper control function 9c includes a function of raising and lowering the machining unit 10 by the moving unit 80 to clamp the workpiece W at a predetermined position of the left and right bending when switching the left and right bending.

The moving unit (swift unit) 80 switches the positional relationship between the machining unit 10 and the workpiece W to the left-curved and right-curved positions by moving the machining unit 10 . The moving unit 80 temporarily moves the machining unit 10 downward relative to the workpiece W to release the workpiece W from the machining unit 10 , and moves the machining unit 10 upward so that the machining unit 10 grasps the workpiece W in a changed posture.

FIG. 2 shows how the processing device 1 is viewed from the processing unit 10 side. The machining unit 10 is attached to the stand 2 so that the bending axis (first axis) 11 is inclined relative to the vertical direction. When bending to the left and bending to the right, it is necessary to reverse the direction of inclination of the bending axis 11 as will be described later. The moving unit 80 performs the first operation of setting the central axis of the unprocessed portion of the workpiece W supported by the workpiece support unit 5 at the set center C of the machining unit 10 and the retraction of setting the central axis at a distance from the set center C. The 2nd action of the position. Therefore, as shown by the dashed-dotted line 89, the moving unit 80 linearly moves the processing unit 10 up and down while swinging left and right, and as a result, the clamped part is lowered and raised relative to the workpiece W in such a manner that a letter U or a letter C is drawn. , during which the inclination of the bending axis 11 is reversed. With the movement of this moving unit 80 , the machining unit 10 linearly moves relative to the workpiece W to a position (set center) C where the workpiece W is gripped. The workpiece W linearly moves from a retracted position to a clamped (holding) position C relative to the machining unit 10 .

FIG. 3 shows an outline by extracting the processing unit 10 . FIG. 4 shows a schematic configuration using a section of the machining unit 10 along the bending axis 11 . The processing unit 10 includes: a bending die jig 20 that rotates around a bending axis (first axis) 11; ; The first drive unit (bending mechanism) 40, which is used to rotate the bending mold clamp 20 around the bending axis 11; the second drive unit (bending mechanism) 50, which is used to make the pressure roller 30 relative to the first The drive unit 40 independently rotates around the bending axis 11; and the opening and closing unit 69 for opening and closing the bending die jig 20 and the pressure roller 30. The opening and closing unit 69 includes a mold opening and closing mechanism (first opening and closing unit) 60 for vertically opening and closing the bending mold jig 20 , and a die opening and closing mechanism 60 that moves the pressure roller 30 against the bending mold jig 20 . A link unit (pressor swing mechanism, second opening and closing unit) 70 for swinging. The machining unit 10 has a slide plate 49 slidably attached to the stand 2 via the moving unit 80 , and these mechanisms 40 to 70 are supported via the slide plate 49 .

The bending die jig 20 includes a pair of upper and lower parting die parts (upper die and lower die, first unit and second unit) 23 and 22 including an arc-shaped portion, in this example, an annular bending groove 24, It is used for bending a workpiece W such as a pipe along the bending groove 24 . The pressure roller 30 includes a holding groove 31 having a semicircular cross section for holding the bar-shaped workpiece W in the curved groove 24 of the bending die jig 20 from the outer peripheral side of the curved groove 24 . The holding groove 31 includes an arcuate portion, and in this example, an annular groove is provided along the entire circumference of the pressure roller 30 .

The stretch-bending mechanism (first drive unit) 40 for driving the bending die jig 20 to rotate the bending die jig 20 includes: a hollow shaft 45 supported to rotate around the bending axis 11 relative to a sliding plate 49; A motor (tension-bending motor) 41 for driving the hollow shaft 45 ; and gears 42 a and 42 b connecting the tension-bending motor 41 and the hollow shaft 45 . The stretch bending motor 41 is fixed to the slide plate 49 via the support plate 48a. The hollow shaft 45 is rotatably attached to support plates 48 b and 48 c fixed to the slide plate 49 via bearings 47 a and 47 b. When the hollow shaft 45 is driven by the stretch-bending motor 41 to rotate the hollow shaft 45, the bending die jig 20 is centered on the bending axis 11 via the upper die opening and closing shaft 63 and the lower die opening and closing shaft 62 that rotate together with the hollow shaft 45. driven by rotation.

The press bending mechanism (second driving unit) 50 for driving the pressure roller 30 to rotate the pressure roller 30 includes a housing 55 mounted rotatably around the hollow shaft 45, and for driving the housing 55 so that the housing 55 A rotating second motor (bending motor) 51 and gears 52 a and 52 b connecting the pressing motor 51 and the case 55 . The pressing roller 30 is mounted on the housing 55 via the pressing member swing mechanism 70 , and when the bending motor 51 drives the housing 55 to rotate the housing 55 , the pressing roller 30 and the housing 55 rotate around the bending axis 11 together. The housing 55 is attached to the hollow shaft 45 with bearings 57 a and 57 b provided on the outer periphery of the hollow shaft 45 . The press bending motor 51 is fixed to the slide plate 49 by the support plate 48c.

The mold opening and closing mechanism (first opening and closing unit) 60 together with the presser swing mechanism (second opening and closing unit) 70 constitutes an opening and closing unit 69 for making the upper mold (first unit) 23, The lower mold (second unit) 22 and the presser 30 are opened and closed in three different directions with respect to the set center C of the workpiece W. As shown in FIG. The mold opening and closing mechanism 60 as the first opening and closing unit is used to open the upper mold (first unit) 23 and the lower mold (second unit) 22 as the upper and lower paired mold parts of the bending mold clamp 20 up and down, closed body. The mold opening and closing mechanism 60 includes: a lower mold opening and closing shaft 62, which is inserted into the hollow shaft 45 in a manner capable of sliding up and down along the bending axis 11; The sliding mode is inserted into the inside of the lower mold opening and closing shaft 62; the left and right screw rod 65 has different threads from the left and right sides of the lower mold opening and closing shaft 62 and the upper mold opening and closing shaft 63; and the third motor (mold opening and closing motor, Opening and closing motor) 61, which is used to drive the left and right screw rod 65 to make the left and right screw rod 65 rotate. The mold opening and closing motor 61 is fixed to the slide plate 49 via the support part 48d, and the right-and-left screw 65 is rotatably attached to the support plate 48a via the bearing 67. As shown in FIG.

The upper die 23 of the bending die fixture 20 is threadedly fixed on the upper die opening and closing shaft 63 , and the lower die 22 is threaded and fixed on the lower die opening and closing shaft 62 . At least a part of the upper mold opening and closing shaft 63 and the lower mold opening and closing shaft 62, which are connected to the upper mold 23, the lower mold 22, and the hollow shaft 45 (through the portion) has a stop shape such as a square cross section. The opening and closing shaft 63 and the lower mold opening and closing shaft 62 rotate in conjunction with each other around the bending axis 11 . The right-handed screw 65 has, for example, a left-handed thread portion (left-handed external thread) 65b at a portion connected to the upper die opening and closing shaft 63, and a right-handed threaded portion (right-handed external thread) 65a at a portion connected to the lower die opening and closing shaft 62. . The upper mold opening and closing shaft 63 includes a left-handed internal thread portion 63 a , and the lower mold opening and closing shaft 62 includes a right-handed internal thread portion 62 a formed on the nut 64 . Left-handed and right-handed threads can also be reversed. Therefore, when utilizing the mold opening and closing motor 61 to make the left and right screw rods 65 rotate positively and negatively, the upper mold opening and closing shaft 63 and the lower mold opening and closing shaft 62 move in different directions up and down, so that the upper mold 23 and the lower mold 22 are balanced up and down ( Movement together) to open and close (balanced opening and closing). The moving distance of the upper die 23 and the lower die 22 also can be equal, and the moving distance of the upper die 23 and the lower die 22 can also be changed by changing the pitch of the screw threads corresponding to the upper die 23 and the lower die 22 . In order to be able to adjust the mold closing height, a nut 64 is attached to the lower mold opening and closing shaft 62 so that the nut 64 can be fixed at an arbitrary rotation phase.

The right-and-left screw 65 preferably adopts a trapezoidal thread or the like within a thread lead angle capable of self-locking by frictional force. The mold opening and closing motor 61 can be downsized by reducing the diameter around the bending axis and self-locking the mold opening force, compared to opening and closing by a normal ball screw or air-hydraulic cylinder. In addition, by adopting the left and right spiral screws 65, the interference area around the bending axis 11 can be reduced, the space efficiency can be improved, and the compact processing unit 10 can be provided.

The presser swing mechanism (link unit) 70 as an example of the second opening and closing unit is a mechanism for interlocking the casing 55 and the pressurizing roller 30 that rotate about the bending axis 11 . The pressure member swing mechanism 70 includes: a holder 71 that rotatably supports the pressure roller 30; a support member 74 that is supported by the housing 55 via a fulcrum pin 72 so that the holder 71 swings; an opening spring 77 that For imparting force to stretch the holder 71 to an open state; a cylindrical cam 75 which is integrated with the lower mold opening and closing shaft 62 and moves up and down; Contact and overcome the force of the opening spring 77 to swing the holder 71 .

When the upper mold 23 and the lower mold 22 of the bending die jig 20 are opened (when the mold is opened), the pressure roller 30 is opened by the opening spring 77 . When the upper mold 23 and the lower mold 22 are closed (when the mold is closed), the skirt-shaped cylindrical cam 75 that is arranged on the lower mold opening and closing shaft 62 to bend the mold clamp 20 is narrow and expands downward to make the cam move from The movable member 73 swings along the inclined surface 75 a of the cylindrical cam 75 . The retainer 71 integrated with the cam follower 73 and supported by the supporting member 74 by the fulcrum pin 72 so as to swing obliquely with respect to the bending axis 11 swings together with the cam follower 73 and closes the pressure roller 30 to the same position as the cam follower 73 . The position where the workpiece W contacts. During bending, the cam follower 73 contacts the outer cylindrical portion 75b outside the inclined surface 75a of the cylindrical cam 75, and the cam follower 73 rotates around the bending axis 11 at a position separated from the bending axis 11. The cam follower 73 receives the opening force of the pressure roller 30 and clamps the workpiece W together with the bending die jig 20 .

Therefore, in the processing unit 10, the holding energy of the mold clamping force is unnecessary. In addition, the mold opening and closing motor 61 can be used to open and close the upper mold 23, the lower mold 22, and the pressure roller 30, and the mold opening and closing mechanism 60 and the pressing member swing mechanism 70 can be used to realize a three-way opening and closing mechanism of a motor. Therefore, in the processing unit 10, the upper mold 23, the lower mold 22, and the pressure roller 30 are opened and closed synchronously by using a small energy-saving opening and closing member.

In addition, in the presser swing mechanism (link unit) 70, the support 74 that supports the holder 71 swingably via the fulcrum pin 72 includes a connecting portion rotatably connected around the lower mold opening and closing shaft 62. 74a. The connecting portion 74 a includes a slide bearing, and transmits the load near the fulcrum pin 72 of the support 74 to the lower mold opening and closing shaft 62 extending along the bending axis 11 . Therefore, when the workpiece W is clamped by the upper die 23 , the lower die 22 , and the pressure roller 30 for bending, the bending reaction force acting on the link unit 70 can be received near the bending die holder 20 as the bending portion. Therefore, the loads on the bearings 57a and 57b connected to the casing 55, the bearings 47a and 47b around the other bending axis 11, and the like can be reduced. In addition, the deformation caused by the bending moment of the link unit 70 including the support 74 and the like can be reduced, and the workpiece W can be grasped with higher precision. When it is not necessary to consider the influence of the bending moment of the link unit 70, the support member 74 may have a structure that does not include the connecting portion 74a.

FIG. 5 shows how the upper mold 23, the lower mold 22, and the pressure roller 30 are opened and closed. (a) of FIG. 5 shows a mold-opening state. The upper die 23 and the lower die 22 of the bending die jig 20 and the pressure roller 30 are opened in three directions centering on the position C where the workpiece W is set (the position on the central axis of the workpiece W, the setting center). (b) of Fig. 5 shows a closed mold state. A state in which the upper die 23 and the lower die 22 of the bending die jig 20 and the pressure roller 30 are closed is shown. However, in these figures, in order to show the movement of the cam follower 73 etc., the state which cut|disconnected the connection part 74a of the support 74 is shown.

In this processing unit 10, the mold opening and closing mechanism 60 for opening and closing the upper mold 23 and the lower mold 22 of the bending mold clamp 20 and the pressing member swing mechanism 70 for opening and closing the pressure roller 30 are The skirt-shaped cylindrical cam 75 moves in conjunction with opening and closing of the pressure roller 30 while being driven by the opening and closing of the upper die 23 and the lower die 22 . Therefore, an opening and closing driver of the pressure roller 30 is unnecessary, a sensor for detecting the opening and closing position, and a mechanism for controlling the operation of the pressure roller 30 are unnecessary.

In this example, the pressure roller 30 is in the form of supporting a round roller in a rotatable manner, but it may also be in the form of supporting a rectangular-shaped pressure member in a swingable manner within a range required for left and right bending, or in a form capable of A shape in which a rectangular-shaped pressure member is supported by swinging and sliding along the axial direction of the pipe.

As shown in (a) of FIG. 5 , the upper mold (first unit) 23 and the lower mold (second unit) 22 are opened and closed equally (balanced) up and down along the bending axis 11 by the mold opening and closing mechanism 60. The presser 30 is opened and closed in a direction (orthogonal direction) 12 substantially perpendicular to the bending axis 11 in conjunction with the mold opening and closing mechanism 60 by the presser swing mechanism 70 . Therefore, these upper mold 23, lower mold 22, and presser 30 can be bent in three different directions around the center (central axis, set center) C of the unprocessed workpiece W for bending. They are opened and closed at a distance that does not interfere with the movement of the workpiece W. Therefore, the workpiece W can be moved along the linear path 13 between the setting center C and the retracted position E. As shown in FIG.

In this processing device 1 , the position of the workpiece W is substantially stationary, and the processing unit 10 is moved up and down by the moving unit 80 . Therefore, when the workpiece W is moved in and out in the vertical direction (vertical direction), as shown in (c) of FIG. There is a gap for the workpiece W to move in the vertical direction without interference, the bending axis 11 is tilted (rotated, swung) to the left in the drawing with respect to the workpiece W, and the machining unit 10 is moved upward along the linear path 13 ( vertical direction) so that it can approach the workpiece W. At this time, the machining unit 10 can be inclined to an angle at which the clamping portion 23b of the upper die 23 does not interfere with the path 13, or the clamping portion 23b can be retracted to an angle where the clamping portion 23b does not interfere with the path 13 by rotating the bending mold clamp 20 around the bending axis 11. Where path 13 interferes. When the inclination of the processing unit 10 increases, the load (moment) of a heavy object such as a motor increases, so it is desirable to rotate the bending die jig 20 to avoid interference of the clamping portion 23b. By closing the upper mold 23 , the lower mold 22 , and the presser 30 in a state where the center of the workpiece W reaches the set center C, the workpiece W can be clamped and bending can be started.

When it is necessary to change the angle of the bending process, the bending axis 11 of the processing unit 10 can be rotated to a predetermined angle in the mold opening state of Fig. 5 (a), and the workpiece support unit 5 can also rotate the workpiece W to a predetermined angle. angle. When the workpiece W is released, the upper mold 23, the lower mold 22 and the pressing member 30 can also be opened in three directions again, so that the processing unit 10 can be lowered downward along the path 13, and the workpiece W can be released. In this state, the workpiece W is moved by an appropriate distance or rotated by a predetermined angle by the workpiece support unit 5 . In addition, instead of raising and lowering the machining unit 10 by the moving unit 80 , the machining unit 10 may be raised and lowered by the workpiece support unit 5 .

On the other hand, when performing right-hand bending on the workpiece W, as shown in FIG. 10 moves upward (in the vertical direction) along a linear path 13 so that it can approach the workpiece W. As shown in FIG. The linear path 13 in (c) of FIG. 5 and (d) of FIG. 5 is a common path for left and right curves. Therefore, right-hand and left-hand bending of the workpiece W can be easily switched only by changing the arrangement of the presser 30 around the bending axis 11 and the inclination of the bending axis 11 while moving the machining unit 10 up and down by the moving unit 80 .

FIG. 6 shows the outline of the bending die jig 20 . (a) of FIG. 6 magnifies a state in which the processing unit 10 is viewed from above, that is, the direction of the bending die jig 20 , and shows the part centering on the bending die jig 20 . (b) of FIG. 6 shows a state in which the workpiece W is gripped by the gripping groove 25 of the bending die jig 20 viewed from the extending direction of the workpiece W (the extending direction of the gripping groove 25 ). (c) of FIG. 6 shows a state in which the workpiece W is gripped by the second gripping groove 26 of the bending die jig 20 viewed from the extending direction of the second gripping groove 26 .

Fig. 7 representatively draws out the lower die 22 of the bending die fixture 20 to show, Fig. 7 (a) is a top view, Fig. 7 (b) is a side view of the extension direction of the holding groove 25, Fig. 7 (c) It is a side view in the extending direction of the second holding groove 26 . The structure of the upper mold 23 that forms a pair with the lower mold 22 is also shared with the lower mold 22 and is omitted from illustration.

The bending die jig 20 includes: a pair of upper and lower parting mold parts 23a and 22a, which include a curved groove 24 having an arc-shaped portion; and a pair of upper and lower clamping parts 23b and 22b, which are used to hold 24 rod-shaped workpiece W. The pair of upper and lower clamping portions 23b and 22b protrude from the pair of upper and lower split mold portions 23a and 22a in the circumferential direction of the curved groove. Therefore, the upper first clamping portion (upper clamping portion) 23b of the upper and lower pair of clamping portions and the upper first split mold portion (upper side split mold) of the upper and lower pair of split mold portions Die part) 23a is integrated, and constitutes the upper die (first unit) 23. In addition, the second clamping portion (lower clamping portion) 22b on the lower side of the upper and lower pair of clamping portions and the second split mold portion (lower side split mold portion) on the lower side of the upper and lower pair of split mold portions Die part) 22a is integrated to form the lower die (second unit) 22.

Each of the upper and lower pair of clamping parts 23b and 22b includes a clamping groove 25 and a second clamping groove 26 respectively connected to the curved groove 24 so as to intersect in an X shape and extend along the tangential direction of the curved groove 24 . The clamping parts 23b and 22b are protrusions that protrude in a trapezoidal shape from one of the upper and lower divisions of the outer periphery of the bending mold to the outer peripheral side, where they are left-right symmetrical and converged in a letter X shape and are connected to the bending groove 24 with a tangent The semicircular grooves 25 and 26 used by the left and right bends of the two pipeline clamps of the bending radius. One of the holding groove 25 and the second holding groove 26 is used as a pipe holding groove for left bending, and the other is used as a pipe holding groove for right bending. In this example, the gripping groove 25 is a gripping groove for bending the workpiece W to the left when viewed from above, and the second gripping groove 26 is a gripping groove for bending the workpiece W to the right when viewed from above. .

The bending die jig 20 is used for left bending and right bending, and is a common bending die jig for left and right bending. Therefore, in the processing unit 10 and the processing device 1 using the bending die jig 20 , rod-shaped members (workpieces) W such as pipes and tubes can be processed flexibly and efficiently.

FIG. 8 shows several bending processes that can be performed with the machining unit 10 . (a) of FIG. 8 shows left-hand bending (the first mode), (b) of FIG. 8 shows right-hand bending (the second mode), and (c) of FIG. 8 shows left-hand bending (the third mode). , (d) of FIG. 8 shows the left press bending process (the fourth mode). Each figure shows the bending start position. The bending die jig 20 is capable of rotating 360 degrees. The pressure roller 30 is rotatable within a range that does not interfere with the slide plate 49 , the support plate 48 b connecting the slide plate 49 and the processing unit 10 , and the like.

In the left-hand draw bending process (first mode) of FIG. Set in the bend direction. The stretch bending motor 41 is driven to use the stretch bending mechanism 40 to rotate the bending die jig 20 to the left (clockwise direction, first rotation direction) when viewed from above. The pressure roller 30 does not rotate, and the bending die jig 20 is rotated relative to the pressure roller 30 .

In the right-hand draw bending process (second mode) of FIG. Set in the bend direction. The stretch bending motor 41 is driven to rotate the bending die jig 20 to the right (counterclockwise, second direction) when viewed from above. The pressure roller 30 does not rotate, and the bending die jig 20 is rotated relative to the pressure roller 30 .

In the left press bending process (third mode) of FIG. Set in the bend direction. The press bending motor 51 is driven to use the press bending mechanism 50 to rotate the pressure roller 30 leftward (clockwise) when viewed from above. The bending die jig 20 does not rotate, and the pressure roller 30 is rotated relative to the bending die jig 20 .

In the right press bending process (fourth mode) of FIG. Set in the bend direction. The press bending motor 51 is driven to rotate the pressure roller 30 to the right (counterclockwise) when viewed from above. The bending die jig 20 does not rotate, and the pressure roller 30 is rotated relative to the bending die jig 20 .

In the processing unit 10, by independently and selectively rotating the bending die jig 20 with the stretch bending motor 41 and independently and selectively rotating the pressure roller 30 with the press bending motor 51, left and right bending and stretch bending can be performed. Press bending is a hybrid bending of these 4 modes.

In addition, in the bending mold jig 20, one of the outer peripheries of the upper split mold 22 and the lower split mold 23 that are opened and closed in the direction of the bending axis 11 is symmetrically collected and provided with a holding groove for left bending. 25 and the clamping groove 26 that right bending is used. Therefore, the interference of the clamp mechanisms (clamping portions) 23b and 22b in the radial direction and rotational direction of the bending axis 11 can be minimized. In addition, by independently rotating the pressure roller 30 and the bending die clamp 20, the pressing position and the clamping position can be freely rotated and moved to respective positions around the bending axis 11 including the start position and end position of the left and right stretch bending and bending. various angles. Therefore, the bending die jig 20 is a common bending die jig for left and right stretch-bending and pressure-bending that can handle large bending angles, and the processing unit 10 that can rotate independently with respect to the pressure roller 30 using the bending die jig 20 can perform various operations. Various bending processes can also be handled with large bending angles.

9 and 10 show a schematic configuration of the moving unit (rotation unit) 80 . (a) of Fig. 9, (b) of Fig. 9 and (c) of Fig. 9 show moving unit 80, (d) of Fig. 9, (e) of Fig. 9 and (f) of Fig. express. (a) of FIG. 9 , as shown in (d) of FIG. 9 , shows a state in which the processing unit 10 is set in a left bending state on the left side (clockwise direction) when viewed from above the bending mold jig 20 by the moving unit 80. (1st action). (c) of FIG. 9 shows a state in which the processing unit 10 is set in a right-curved state by the moving unit 80 (first operation), as shown in (f) of FIG. 9 . (b) of FIG. 9, as shown in (e) of FIG. 9 , shows that the processing unit 10 is temporarily moved downwards by the moving unit (quick turn unit) 80 to switch from left bending to right bending, or vice versa (fast turn). ) state (second action). In addition, (a) of FIG. 10 is a transverse cross-sectional view of the mobile unit 80, and (b) of FIG. 10 is a longitudinal cross-sectional view of the mobile unit 80 along the central axis.

The moving unit 80 includes a function as a first moving unit that moves the machining unit 10 vertically and swings left and right. The moving unit 80 has: a connecting plate (base) 81 which is connected and fixed to the stand 2; and a holder 83 which is plate-shaped and supported so as to swing left and right with respect to the connecting plate 81 around the swing shaft 82 (fulcrum). and the slide plate 49 that slides in the length direction (axis direction) 83c of the holder 83 . The processing unit 10 is attached to the slide plate 49 . The lower end 81 a of the connecting plate 81 is curved convexly about the center of the swing shaft 82 so as to form a part of an arc. The holder 83 includes a guide block 83a guided along the lower end 81a of the connecting plate 81 so that the holder 83 swings left and right. The upper surface 83b of the guide block 83a is a concave guide surface that contacts the lower end 81a of the connecting plate 81 .

The moving unit 80 includes: a rotating gear 84 installed in a position along an axis (axis direction) 83c in the center of the holder 83 so as to be able to guide and rotate on the outer periphery; and a rotating motor 85 held by the holder 83 , And the rotation gear 84 is driven by means of the connecting gears 86a and 86b. The rotating gear 84 is inserted into the holder 83 in a state of being sandwiched between the slide plate 49 and the connecting plate 81, and includes a rotating roller 84a protruding forward and backward (front and back) at a position along the axis 83c and at an eccentric position. . The back side of the turning roller 84a is inserted into the first cam groove 81x extending in the vertical direction (vertical direction) along the axis 81c of the connecting plate 81, and the turning roller 84a moves along the first cam groove when the turning gear 84 rotates. 81x up and down movement. The front side of the turning roller 84a is inserted into the second cam groove 49x extending in a direction perpendicular to the sliding direction (axis direction) 83c of the sliding plate 49, and when the turning gear 84 rotates, the turning roller 84a moves along the second cam groove 49x. The groove 49x moves so that the holder 83 swings left and right about the swing shaft 82 . The slide plate 49 moves up and down.

The workpiece W is supported on the axis 81c of the connecting plate 81 by the workpiece support unit 5 . The machining unit 10 is supported such that the bending axis 11 coincides with the axis 83 c of the holder 83 and the slide plate 49 . Therefore, when the rotating gear 84 is driven clockwise by the rotating motor 85 from the state shown in FIG. The swing shaft 82 rotates counterclockwise around the center. And the turning roller 84a moves along the 1st cam groove 81x, the slide plate 49 moves upward along the axis|shaft 83c, and it becomes the state shown in FIG.9(a).

As a result, as shown in (d) of FIG. 9 , the machining unit 10 attached to the sliding plate 49 moves upward with the bending axis 11 inclined by the first movement of the moving unit 80, and the workpiece W arrives at a left-hand bending position. The setting center C of the state where the upper mold 23, the lower mold 22, and the pressing member 30 are opened in the initial position. Therefore, the processing unit 10 closes the upper die 23 , the lower die 22 , and the presser 30 in this state, grips the workpiece W at a predetermined position, and starts the left bending process.

In the case of switching to the right bending process after the left bending process is completed, when the rotating gear 84 is driven by the rotating motor 85 to rotate the rotating gear 84 counterclockwise from the state shown in (a) of FIG. The state shown in (b) of FIG. 9 . Therefore, as shown in (e) of FIG. 9 , the processing unit 10 mounted on the sliding plate 49 moves downward by the second movement performed by the moving unit 80, and the workpiece W moves (relatively moves) from the set center C to its own position. The retreat position E where the machining unit 10 is separated upward.

And when the rotating gear 84 is driven by the rotating motor 85 to rotate counterclockwise, the rotating roller 84a moves along the second cam groove 49x, and the slide plate 49 rotates clockwise around the swing shaft 82. The turning roller 84a moves along the first cam groove 81x, and the slide plate 49 moves upward along the axis 83c, and the state shown in (c) of FIG. 9 is established.

As a result, as shown in (f) of FIG. 9 , the machining unit 10 attached to the sliding plate 49 moves upward while the bending axis 11 is inclined in the direction opposite to that of (d) of FIG. The setting center C of the state where the upper die 23 , the lower die 22 , and the pressing member 30 are opened at the initial position of bending. Therefore, the processing unit 10 closes the upper die 23 , the lower die 22 , and the presser 30 in this state, grips the workpiece W at a predetermined position, and starts right-hand bending.

Therefore, as shown in FIG. 2 , the processing unit 10 temporarily descends downward and swings in the opposite direction to the left and right, changes the orientation of the upper mold 23, the lower mold 22, and the pressing member 30, and then rises again, thereby bending from right to left, Or conversely, the workpiece W is bent. As shown in Fig. 8, both right bending and left bending can be either tension bending or compression bending.

The position of the swing shaft 82, the radius of rotation and the angle of rotation of the turning roller 84a can be selected so that when the processing unit 10 is moved upward, the movement of the bar-shaped member (workpiece) W bent left and right is consistent with the supply and discharge path 13 of the processing unit 10. . In addition, the position of the swing shaft 82, the turning radius and the turning angle of the turning roller 84a can be selected so that when switching the left and right of the bending axis 11, the machining unit 10 can detour to the position E where the workpiece W retreats with an appropriate clearance. Secure the required track and lift travel. At this time, if the clamping portion of the clamp-integrated bending die holder 20 interferes with the linear movement path 13 of the workpiece W, the interference can be avoided by rotating the bending die holder 20 around the first axis 11, and the workpiece can be supplied linearly. , Discharge workpiece W.

In addition, in the above content, it has been described that the rotating roller 84a is rotated by the rotating motor 85 through the connecting gears 86a and 86b and the rotating gear 84, and the lifting of the sliding plate 49 and the left and right swinging of the holder 83 are carried out simultaneously. 89 examples of movement. The second cam groove 49x provided on the sliding plate 49 can also be changed into a linear groove in the horizontal direction, and can be made into an arc groove or a V-shaped groove symmetrical to the center line. In addition, the vertical movement and the switching of the left and right inclinations of the processing unit 10 may be performed sequentially. It is also possible to appropriately change the stroke and rotation trajectory of the processing unit 10 as it moves up and down. It is desirable to rotate the upper mold 23, the lower mold 22, and the pressing member 30 by an appropriate angle around the bending axis 11 in the open state during the retraction period of the machining unit 10 from the workpiece W, and set (rotate and retract) the bending mold A position where the clamps (protrusions) 23 b and 22 b of the clamp 20 do not interfere with the workpiece W. As shown in FIG.

As shown in (b) of FIG. 10 , the moving unit 80 may further include a balance mechanism 87 for pressing (pressing) the sliding plate 49 upward, and a balance mechanism 87 for pressing the sliding plate 49 relative to the connecting plate 81 in a state where the holder 83 swings left and right. The lock mechanism 88 of the lock holder 83 . It is desirable that the balance mechanism 87 includes a pressing member such as an air cylinder or a spring for supplying all or part of the upward direction required to push the slide plate 49 upward together with the weight of the processing unit (bending unit) 10 . thrust. Since all or part of the weight of the machining unit 10 can be supported by the balance mechanism 87, the output of the rotation motor 85 for driving the rotation gear 84 to rotate the rotation gear 84 can be reduced.

The locking mechanism 88 includes a member for fixing the guide block 83 a fixed to the holder 83 and the connecting plate 81 , such as a key, and reliably supports the load applied to the rotation motor 85 attached to the holder 83 . In addition, the processing unit (bending unit) 10 can also be applied to the rotary bending process twisted around the set center C. In this case, the moment of inertia of the twist is easily applied to the turning motor 85, but by 88 is fixed to the connecting plate 81 and the holder 83 after the processing unit 10 is switched to the left-right bending position, and the influence of the moment of inertia can be suppressed.

In this example, the link plate 81 and the guide block 83a of the holder 83 are used to lock the processing unit 10 to prevent further swinging in the left and right bending position, but the locked position can also be performed by the holder 83 and the rotation gear 84 . In addition, instead of raising and lowering the machining unit 10 by the moving unit 80 , the workpiece support unit 5 may have a lifting function to move the workpiece W to the retracted position E. In this case, since the slide plate 49 and the holder 83 can be formed integrally, the horizontal groove (second cam groove) 49x for raising and lowering the slide plate 49 and the rotating roller penetrating the groove can also be omitted. 84a is a structure in which the bending axis 11 of the processing unit 10 is simply inclined left and right.

Another mechanism such as an XY orthogonal slide may be provided as a means (moving means) for switching the orientation of the processing unit 10 . This mobile unit 80 has the characteristics of fewer drivers and components, and can realize compactness and weight reduction, and can use the rotation moment of the rotating gear 84 for less than one revolution in superimposition with the pipeline transportation and twisting between the bending points when the pipeline axis is fixed. Switch to the side-to-side bend position. Therefore, it is possible to significantly shorten the left and right bending switching time.

FIG. 11 shows the outline of a method (processing method, processing device control method) for processing the workpiece W by the processing device 1 using a flowchart. In step 201, the clamp control function 9c of the control unit 9 controls the mold opening and closing mechanism 60, so that the upper mold 23, the lower mold 22, and the pressing member 30 are opened in three different directions around the set center C, and put Open workpiece W. Further, the machining position control unit 9 a controls the workpiece support unit 5 to move the workpiece W so that the machining position reaches the machining unit 10 . In addition, the angle (rotation angle) of the workpiece W is also controlled so that the bending direction faces a desired direction.

When the workpiece W arrives at the point of bending processing, the processing control unit 9b judges the processing mode in step 202, if it is the left-hand bending processing of the first mode M1, then the processing unit 10 is set to the first mode (left-hand bending) in step 203 bending processing). That is, in a state where the upper mold 23, the lower mold 22, and the pressing member 30 are opened in three different directions relative to the set center C of the workpiece W, the machining unit 10 is tilted so that the workpieces are opposed to each other in a straight line. Movement is set at the setting center C.

In step 209, the clamp control function 9c closes the upper mold 23, the lower mold 22, and the presser 30 to clamp the workpiece W, and performs bending in the set mode. If the mode is different from the previously performed bending process, in step 203 , the process control unit 9 b uses the moving unit 80 to raise and lower the process unit 10 as described above, and performs processing to change the orientation of the process unit 10 relative to the workpiece W.

As far as the clamping position of the bending mold fixture 20 and the left and right bending position switching of the pressure roller 30 are concerned, the pressure roller 30 is rotated and moved to the next bending start position after the processing unit 10 descends, and the bending mold fixture 20 is moved to the next bending start position at the rising end. The clamping portions (protrusions) 22b and 23b are rotationally moved to the bending start position. These switching processes of left and right bending, press bending, and stretch bending can also be performed in parallel with the workpiece conveyance in step 201 . The switching of the left and right bending positions can be performed by lifting the pipe chuck (work support unit) 5 side and moving left and right of the bending axis 11 of the processing unit 10, or by lifting and rotating the work support unit 5 side.

Similarly, if in step 204 it is the right-hand draw-bending process of the second mode M2, then in step 205, the processing unit 10 is set to the second mode (right-hand draw-bending process), and the workpiece W is clamped in step 209. Bend in good mode. If it is the left press bending process of the third mode M3 in step 206, then in step 207, the processing unit 10 is set to the third mode (left press bending process), and the workpiece W is clamped in step 209. mode for bending. If it is not in these modes, the machining unit 10 is set to the fourth mode (right press bending) in step 208, the workpiece W is clamped in step 209, and bending is performed in the set mode.

In the bending process, in the state where the upper die 23, the lower die 22, and the pressure roller 30 of the bending die jig 20 are closed, the upper die 23 and the lower die 22 are gripped by the clamping groove portion 25 or 26 of one of the upper die 23 and the lower die 22. Workpiece W. In the case of stretch bending in which the upper die 23 and the lower die 22 are rotated, the upper die 23 and the lower die 22 are rotated together with the bending hollow shaft 45 by the stretch bending motor 41 via gears 42a and 42b. In the case of press bending that rotates the pressure roll 30 supported on the casing 55, the pressure roll 30 is rotated around the bending die jig 20 through the gears 52a and 52b by the press bending motor 51, along the The bending groove 24 of the mold 22 bends the workpiece W. As shown in FIG.

In step 210, it is judged whether the bending process is finished, and if there is a next bending process, it returns to step 201 and repeats the process. The control unit 9 for controlling the processing method (control method) can be realized by computer resources including a CPU and a memory, and the processing method (control method) can be provided as a program (program product) recorded in an appropriate recording medium.

In this method, the rear end of a rod-shaped workpiece W such as a pipe is clamped by the pipe conveying unit (work support unit) 5, and the workpiece W is bent from the first bending point on the front end side of the workpiece W to the final bending point on the chuck side by the pipe conveying unit 5. Bending conveying and twisting can process the workpiece W into various shapes.

The conveyance of the workpiece W in the axial direction may be carried out by mounting the processing unit 10 and the switching unit (moving unit) 80 for switching the left and right bending positions on the conveying unit, and twisting the pipe to the chuck (pipe conveying unit) side. The shape of the organization is fixed.

In this processing device 1 , continuous bending processing in which the left-right bending direction and the stretch bending method are mixed (combined) can be performed. Therefore, a control program (processing data) for bending processing can be generated by selecting and specifying a bending direction and a bending method without interference for each bending portion. For example, identification flags of bending direction and bending method may be added to the processing data table of conveying, twisting and bending for each bending part in the usual one-direction-one-mode bending control program (data). According to the control program corresponding to the selected identification mark, in the processing device 1, the bending die jig 20 and the pressure roller 30 are rotationally moved to the bending start position, and the left and right bending positions are switched by the moving unit 80 if necessary. Subsequent bending motions may be controlled in the same way as the usual one-direction-one-mode bending motion control. The switching operation of the bending direction and the bending method can be controlled, so that it can be automatically and continuously performed superimposed on the conveying and twisting operations between the bending points.

In addition, the control unit 9 may be provided with an automatic calculation function of the arc length corresponding to the bending radius and bending angle in order to transport the pipe by an amount corresponding to the arc length of the bend. The conveyance of the workpiece W can be controlled such that it is conveyed in synchronization with the bending rotation during stretch bending, and conveyed by the length of the straight pipe between bending points during press bending, and conveyed before the bending process.

The above-mentioned processing unit 10 can utilize the balanced opening and closing of the clamp-integrated bending mold to carry out conveying, twisting, and bending back with superimposed actions with the minimum opening and closing stroke. Therefore, high-speed bending is possible. And, using the mold opening and closing mechanism 60 and the pressing member swinging mechanism 70, the upper and lower bending molds (upper and lower dies) 23 and 22 and the pressing member 30 are opened and closed in three directions with one motor. By adopting such an energy-saving opening and closing member, it is possible to provide the processing unit 10 which is small and lightweight and capable of performing various bending processes at high speed.

In the conventional left-right bending machine, there is no function of releasing all the bending dies, jigs, and pressure members with respect to the pipe machining axis (jig center C). Therefore, in the case of automatic supply and discharge in the direction perpendicular to the pipe axis, short-distance supply and discharge on a straight path are difficult due to the interference of jigs or bending dies, and movement in multiple directions is required. Therefore, there are problems that the supply and discharge time becomes longer and the conveying member becomes complicated, and the switching of the left and right bending positions also has the same problem.

That is, in the case of pipe supply and discharge in the vertical direction with less interference with the bending mechanism and the curved pipe, if the structure in which the middle mold and the upper mold are opened and closed in one direction while the lower mold is fixed, In order to set the pipe in the clamping groove of the lower mold, it needs to be lowered to a position that does not interfere with the outer diameter of the upper mold and is in the middle of the mold opening gap, and then move horizontally to the clamping groove position of the bending radius, and then descend until it abuts against the clamping groove of the lower die. Therefore, switching the bending direction also requires the same lift and horizontal movement in the opposite direction. In the case of a structure in which the upper and lower dies are integrally clamped by the bending die from the horizontal direction, vertical and horizontal movements are also required to install the pipe in the bending groove on the outer periphery of the bending die.

In addition, when the mold is bent integrally with a jig that opens and closes in one direction and the lower mold is fixed, in the case of continuous bending at multiple places, the transportation, twisting, and bending operations between the bending points require the clamping of the pipe from the lower mold. Carry out after the trough rises and retreats. In the case of pressing and bending the pressing member, it is necessary to return the pressing member to the bending start position, and perform the retreat after opening the jig to avoid contact scratches between the bending die and the pipe. Therefore, the superimposition of conveying, twisting, and bending operations cannot be realized when the axis of the pipe is fixed, so there is a problem that the bending processing time becomes longer.

In contrast, the processing apparatus 1 described above can linearly supply and discharge a short distance in a direction perpendicular to the axis of the workpiece W (for example, the axis of the pipe) at the left-right bending common position. The processing device 1 is provided with a processing unit (bending unit) 10 for integrally bending the jig up and down with the die 20 and the pressing member 30 in three directions centering on the pipeline axis C of the processing object (bending unit) 10, and the upper die 23 and the pressing member The opening gap between the pressing parts 30 is set as the gap interval that does not interfere with the outer diameter of the pipeline on the straight line supply and discharge path 13 connecting the pipeline axis center (setting center) C. The bending axis 11 of the processing unit 10 is arranged obliquely so that the supply and discharge directions of the row loader (pipe transport unit) 5 are aligned. In addition, at the time of supply and discharge, the jig protrusions (clamping portions) 23 b and 22 b of the bending die jig 20 are rotated and withdrawn to a position where they do not interfere with the pipe supply and discharge path 13 . Thereby, it is possible to carry out straight path supply and discharge in the direction perpendicular to the pipeline axis, and one-way conveyance with the pipeline axis fixed. The mold fixture 20 detours under the workpiece W, and switches to the common pipeline axis and supply and discharge path 13 for left and right bending. With such a structure, it is possible to carry out straight path supply and discharge at the left and right curved common positions, and one-way conveyance where the axis of the pipe is fixed (the setting center C of the workpiece W is fixed). Therefore, it is possible to provide a high-speed pipe bending processing device that can perform superimposed operations of conveying, twisting, bending back, and switching between left and right bending positions when the axis of the pipe is fixed.

In addition, the above-mentioned processing device 1 is an example, and instead of fixing the processing unit 10 as a bending unit and twisting and transporting it on the pipe side (work side), one side of the processing unit 10 may be twisted, or it may be possible to A robot bending device that transports a rotary bending device and a bending unit is incorporated into the processing unit 10 of this example. In the case of using the robot to convey the processing unit 10, conveying and twisting are performed on the robot side, the processing unit 10 has a simple structure and can achieve light weight, so in addition to reducing the conveying weight and utilizing short-stroke opening and closing and superposition operations to perform high-speed In addition to bending, left and right bending can be used to halve the range of torsional motion that interferes a lot in robot bending and takes a long time to move. Therefore, robot bending can be performed at high speed.

FIG. 12 shows a different example of the processing unit 10 . The machining unit 10 performs stretch bending in one direction and press bending in the opposite direction. The machining unit 10 shown in (a) of FIG. 12 and (b) of FIG. 12 comprises: a unidirectional bending mold clamp 20a having a holding groove continuous with the bending groove 24; 30 pieces. As shown in FIG. 12( a ), when the workpiece W is pressed by the pressure roller 30 and the bending die jig 20 a is rotated clockwise, left-hand draw bending can be performed. When the workpiece W is pressed by the bending die jig 20 a to rotate the pressure roller 30 in the counterclockwise direction as shown in FIG. 12( b ), right press bending can be performed.

The bending mold fixture 20a shown in (a) of Figure 12 and (b) of Figure 12 is a bending mold for left pull bending and right pressing bending, as long as it is replaced with a bending mold whose clamping position is in the opposite direction, a kind of bending mold can be provided. A processing unit 10 that performs right stretch bending and left press bending contrary to the above.

In addition, in the case where only the normal stretch-bending function is sufficient, the pressing member 30 may be fixed, or the second drive unit (pressing member 30) for driving the pressing member 30 to rotate the pressing member 30 may be omitted. Bending mechanism) 50 adopts a structure in which a housing 55 for supporting the pressing member 30 is fixed to the sliding plate 49. In addition, the pressing member 30 may be rotated and moved to the left-right bending position by hand or a jig, and the processing unit 10 shared by the left-right bending may be constituted by a structure fixed at this position.

13 and 14 show yet another different example of the machining unit 10 . FIG. 13 is a plan view, and FIG. 14 is a side view. The processing unit 10 includes a bending die jig 20b having left and right bending jigs at two places on both sides, and two fixed type left and right pressure members 30a and 30b arranged left and right. The processing unit 10 includes a presser opening and closing mechanism (third drive mechanism) 90 for selectively opening and closing the pressers 30a and 30b instead of the press bending mechanism 50 for rotating the presser 30a.

The pressing member opening and closing mechanism 90 includes: a pressing member opening and closing cam 93 for operating the cam followers (opening and closing cams) 73a and 73b that open and close the respective pressing members 30a and 30b; The opening and closing motor 95 is used to drive the opening and closing cam 93 of the pressurizing part through the gears 94a, 94b and 94c. The pressing member opening and closing motor 95 is used to rotate the pressing member opening and closing cam 93 around the bending axis 11 to selectively swing the pressing member 30a or 30b on any one side to open and close.

In the case where the pressing pieces 30a and 30b are arranged on both sides of the bending axis 11, it is necessary to make the pressing piece 30a or 30b on the unused side not be in contact with the jig protrusion 23b and 22b and the curved workpiece W (for example, a pipe) interfere with each other, and the bending process is performed in a state where the curved surface of the pipe is opened. The presser opening and closing cam 93 opens and closes only one side of the presser 30a or 30b by rotation. Therefore, the presser opening and closing cam 93 has an inclined cylindrical cam shape, and has a portion that closes the presser 30a or 30b at the largest radius portion in the radial direction and opens the presser by a required gap at the smallest radius portion. , has a shape in which the largest radius portion and the smallest radius portion are smoothly connected by an inclined surface in accordance with the rocking trajectories of the cam followers 73a and 73b. Therefore, by rotating the presser opening and closing cam 93 by the presser opening and closing motor 95, the opening and closing cams 73a and 73b can be operated independently, and either presser 30a or 30b can be independently opened and closed.

In addition, the pressure pieces 30a and 30b in FIG. 13 are linear pressure pieces that adopt the semicircular holding groove 31 on a straight line, and the pressure pieces 30a and 30b slide in the sliding groove of the holder 71 along the axial direction of the pipeline to follow and bend. As an example of the situation, it is returned to the bending start position by a return cylinder (Japanese: 戻しシリンダー) 78 or a spring or the like. In addition, the aforementioned roller-type pressing member (pressing roller) 30 may also be used as the pressing members 30a and 30b.

FIG. 15 shows an example of a processing unit 10 including a roll-type pressure roll 30 in a plan view. The processing unit 10 includes: a bending die jig 20b having clamping portions 23b and 22b for left and right bending at two places on both sides; and two pressure rollers 30 arranged left and right. Right and left stretch bending can be performed by providing a mechanism for avoiding one of the pressure rollers 30 arranged on the left and right.

The bending die jig 20 in FIGS. 13 to 15 can also be formed by converging the holding grooves for left and right bending described in FIGS. 6 to 8 described above in an X shape and collectively provided at one location. As mentioned above, the structure of Fig. 13 to Fig. 15 corresponds to the mixed bending of left and right stretching and bending, but if the left and right bending is not required, it is also possible to set the pressure piece only on either one. In this case, it is also possible to have a manual The mechanism for switching the left and right positions of the pressurizing member. In addition, the pressing member opening and closing mechanism 90 may be omitted, and one pressing member mechanism may be opened by using the skirt-shaped cylindrical cam 75 included in the lower mold opening and closing shaft 62 described in FIGS. 3 to 5 described above. , closed form.

The processing unit 10 also includes a jig that is opened and closed in a balanced manner around the pipe axis (setting center) C, and a clamp that is integrally opened and closed up and down, and a pressure member 30a that opens and closes in a direction at right angles to the direction of opening and closing of the mold. and 30b (or two pressure rollers 30), have the characteristics of the processing unit 10 as a three-way opening and closing structure. Therefore, the open gap between the upper die 23 and the press members 30a and 30b (or the two press rollers 30) can be set to be free of any contact with the pipeline on the straight line supply and discharge path 13 connecting the gap and the center C of the pipeline axis. The outer diameters interfere with each other, and the bending axis 11 of the processing unit 10 is arranged obliquely so that the supply and discharge direction of the supply and discharge loader coincides with the direction of the linear supply and discharge path 13 . In addition, it is desirable to retract the jig protrusions 23 b and 22 b of the bending die jig 20 b to a position where they do not interfere with the pipe supply and discharge path 13 during supply and discharge. In this processing unit 10, it is possible to perform short-distance linear path supply and discharge in a direction perpendicular to the pipeline axis and one-way conveyance in which the pipeline axis is fixed.

In addition, in the above, the skirt-shaped cylindrical cam 75 is formed integrally with the lower mold opening and closing shaft 62, but it may also be configured to be rotatably attached to the lower mold opening and closing shaft 62 via a bearing, and pressurized The cam follower 73 of the member swing mechanism (link unit) 70 becomes a non-rotating cam block.

FIG. 16 shows a simultaneous double-bend bending apparatus that sequentially bends the workpiece W while holding the middle portion of the workpiece W with a chuck and moving the torsion unit from the distal end side to the middle portion direction in FIG. 16 . Fig. 17 is a plan view of the processing device 1a.

The processing apparatus 1a has a stand 2, a chuck unit 160 arranged in the center of the stand 2, a pair of twisting units 100 arranged to face each other across the chuck unit 160, and a pair of bending units respectively mounted on the pair of twisting units 100. (Processing unit) 10, a pair of conveying units 140 for controlling the respective distances of the pair of twisting units 100 relative to the chuck unit 160, and a control unit 90 for controlling these components. The pair of twisting units 100 , the pair of bending units 10 , and the pair of conveying units 140 are arranged so that the units having the same structure face each other across the chuck unit 160 .

The control unit 90 includes: a position control function (position control unit) 93, which controls the conveying unit 140 to determine the bending processing position of the workpiece W (alignment); a processing control function (processing control unit) 95, which controls the The bending processing method performed by the twisting unit 100 and the bending unit 10; the supply and discharge control function (supply and discharge control unit) 97, which controls the supply and discharge of the workpiece W; and the grip change control function (grip change control unit) 98, which controls the workpiece W's change of hold (change of grip). The processing control unit 95 includes a mode 1 (M1) for left-side bending, a mode 2 (M2) for right-side bending, a mode 3 (M3) for left-side bending, and a mode 4 (M3) for right-side bending. M4). The processing control unit 95 can also combine these four bending processing modes with the control by the twisting unit 100 to perform bending processing in three-dimensional directions (rotary bending processing).

The processing device 1 includes two sets of bending and conveying units 150. The bending and conveying units 150 are equipped with a rotating bending unit including a bending unit 10 and a twisting unit 100 on the conveying unit 140. These bending and conveying units 150 are arranged along the The second axis 200 (on the same axis) is arranged opposite to each other. The processing device 1 controls the chuck unit 160 and the conveying and bending units 150 on both sides according to the program (bending data) 91 installed in the control unit 90, and automatically bends both ends of the pipe W simultaneously from both end sides toward the middle part. In addition, the twisting unit 100 of each conveying and bending unit 150 can perform rotational bending by twisting the bending unit 10 around the second axis 200, and can perform twisting to determine the bending direction and bending at a predetermined angle.

Each conveying unit 140 includes a moving stand 148 mounted on a rail 149 of the stand 2 in a front-rear (left-right) sliding manner and a conveying motor 145 driving the moving stand 148 via a ball screw 147 . The twisting unit 100 is mounted on the moving stand 148 , and the distance between the twisting unit 100 and the chuck unit 160 can be controlled by the transport unit 140 .

The torsion unit 100 supports a bending unit (processing unit) 10 for rotating a rod-shaped member (workpiece, pipe) W around a first axis 11 so as to rotate around a second axis (setting center) 200. Perform bending. The torsion unit 100 includes: a torsion gear 101, which is ring-shaped, and is used to support the bending unit 10; a torsion drive unit 110, which is used to drive the torsion gear 101; a guide roller 120, which is centered on the second axis 200 with the torsion gear 101 An outer peripheral surface (outer peripheral portion) 106 of the torsion gear 101 is rotationally supported; and a support plate (support unit) 130 which supports the torsion gear 101 via a guide roller 120 . The support plate 130 is mounted on the moving stand 148 , and the distance between the twisting unit 100 and the chuck unit 160 can be controlled by the transport unit 140 . The bending unit 10 is attached to the torsion gear 101 via the turning unit (moving unit) 80 that controls the angle of the first axis (bending axis) 11 .

The torsion gear 101 includes a first notch 102 partially cut away toward the center. The support plate 130 includes a second opening (through area) 135 larger than the inner opening (first opening, internal space) 105 of the annular torsion gear 101 , and in this example, the torsion gear 101 is housed in the second opening 135 . That is, the support plate 130 includes a second opening 135 that is larger than the first opening 105 in the annular torsion gear 101 around the second axis 200 . Desirably, the first opening 105 is substantially circular, and the second opening 135 is a circular opening having a diameter larger than the inner diameter of the first opening 105 .

The support plate (support unit) 130 further includes a second notch 132 reaching the second opening 135 and opening in a direction perpendicular to the second axis 200 . When the first notch 102 of the ring gear (torsion gear) 101 and the second notch 132 of the support plate 130 are arranged in a straight line, a position (second axis) 200 for machining the workpiece W is formed for supply and discharge. The supply and discharge passage 139. In the processing apparatus 1a of this example, the supply and discharge path 139 is provided in the vertical direction, and the workpiece W held by the chuck unit 160 moves in the vertical direction (up and down) when being supplied and discharged (loaded, unloaded). The support unit 130 is plate-shaped, but may also be constituted by a frame.

The chuck unit 160 includes: a chuck plate 161, which extends along the second axis 200 during workpiece processing; an opening and closing cylinder 163, which is used to open and close the chuck plate 161; , moving the chuck plate 161 up and down when discharging the workpiece W; The chuck plate 161 protrudes in a concave shape at the center relative to the opening and closing cylinder 163 along the second axis 200 in the moving direction of the transport unit 140 (hereinafter referred to as left and right). The central recessed portion of the chuck plate 161 is an escape portion 168 for gripping the workpiece W so as to escape the processed part of the workpiece W, and the portion protruding to the left and right is a gripping portion (work gripping portion) 167 for gripping the workpiece W.

18 to 20 are shown with the twist unit 100 extracted. 18 is a front view of the twist unit 100 , FIG. 19 is a longitudinal sectional view including the second axis 200 of the twist unit 100 , and FIG. 20 is a plan view of the twist unit 100 . 18 shows the state where the first axis (bending axis) 11 of the bending unit 10 is set to supply and discharge the workpiece W, and FIGS. 19 and 20 show the state where the first axis 11 is set in the vertical direction. In addition, in FIG. 19, for description, the structure of the torsion drive unit 110 is shown by the solid line overlapping with a cross-sectional view.

The torsion unit 100 includes: a torsion gear 101 that is annular and supports the bending unit 10 so as to rotate around the second axis 200 via the rotation unit 80; a support plate 130 that supports the torsion gear 101 via the guide roller 120; and a torsion drive unit. 110, which is used to drive the torsion gear 101. In addition, the bending unit (processing unit) 10 and the rotating unit (moving unit 80 ) share the same basic structure as the processing unit 10 and the moving unit 80 employed in the above-mentioned processing device 1 , and therefore description thereof will be omitted below.

The torsion gear 101 is an annular and shaftless spur gear, and includes a first opening (annular opening, internal space, through hole) whose inner diameter (annular inner diameter) R1 is about 1/3 or larger than the outer diameter of the torsion gear 101 105. The first opening 105 of the torsion gear 101 has a size for not only passing the workpiece W but also allowing the gripping portion 167 of the chuck plate 161 of the chuck unit 160 to come in and out (insert), and functions as a chuck through hole. The torsion gear 101 further includes a first notch 102 opened in a direction perpendicular to the second axis 200 , and the first notch 102 functions as an open groove for feeding and discharging the workpiece W into and out of the first opening 105 .

The support plate (support unit) 130 is a plate-shaped member extending in the vertical direction, and has a second opening 135 for accommodating the torsion gear 101 in its central upper portion. In the processing device 1a of this example, the torsion gear 101 is accommodated in the support plate 130, but the torsion gear 101 can also be installed on the outside of the support plate 130. In this case, in order to make the first opening 105 of the torsion gear 101 To function as the chuck through hole, the inner diameter of the second opening 135 is desirably equal to or greater than the inner diameter R1 of the first opening 105 . In this example, the torsion gear 101 is housed in the support plate 130 to prevent the torsion gear 101 from protruding to the front and back of the support plate 130 . Therefore, the diameter (inner diameter) of the second opening 135 is equal to or larger than the outer diameter of the torsion gear 101 . By accommodating the torsion gear 101 inside the support plate 130, the torsion gear 101 is prevented from jumping out, the distance L1 between the support plate 130 and the first axis (bending axis) 11 can be reduced, and the area where the workpiece W is difficult to process can be shortened. (length).

A plurality of guide rollers 120 are arranged in the second opening 135 to face inward. These guide rollers 120 rotatably support the outer peripheral portion 106 of the torsion gear 101 housed in the second opening 135 in such a way as to be sandwiched from front to back (left and right). The inside rotates smoothly. The rotational support form of the torsion gear 101 is a form in which inclined surfaces for guide surfaces are provided on both outer peripheral surfaces of the torsion gear 101 , and the guide surfaces are sandwiched from both sides by guide rollers 120 such as cam followers. A mechanism serving as a stopper for restricting the movement of the torsion gear 101 in the front-back direction may be provided on the support plate 130 , and the guide roller 120 supports the torsion gear 101 horizontally.

The support plate 130 further includes a second notch 132 that opens in the vertical direction with respect to the second axis 200 and is connected to the second opening 135 . The second notch portion 132 functions as an open groove for moving the workpiece W in and out (supply, discharge) to the second opening 135 . Therefore, by rotating the torsion gear 101 rotating inside the second opening 135 so that the first notch 102 is in the vertical direction, the first notch 102 and the second notch 132 are arranged in a straight line to form a configuration for The workpiece W enters and exits the supply and discharge groove 139 of the first opening 105 of the twist gear 101 . As described above, the bending unit (processing unit) 10 can move the workpiece W in and out (supply and discharge) linearly by opening the upper mold 23, the lower mold 22, and the presser 30 in three directions as a device during processing. The position of the second axis 200 at the fixed position (setting center) C. Therefore, the workpiece W can be moved to the retracted position E in the vertical direction by the linear path 13 via the supply and discharge chute (supply and discharge path) 139 . In addition, at this time, by rotating the upper die 23 and the lower die 22 around the bending axis 11 , the clamping portion of the upper die 23 on the route 13 in FIG. 18 can retreat from the route 13 .

The torsion unit 100 also includes a torsion drive unit 110 for rotating the torsion gear 101 by driving the torsion gear 101 using a plurality of pairs, in this example, eight pairs of left and right guide rollers 120 installed inside the support plate 130 . It is sandwiched from the front and back and is rotatably supported. The twist driving unit 110 includes a twist motor 115 fixed to a support plate 130 via a mounting plate 119 and a plurality of driving gears 112 for transmitting a driving force of the twist motor 115 to the twist gear 101 . The torsion gear 101 is torsionally rotated within a range of 360 degrees by the torsion motor 115 inside the support plate 130 .

The plurality of driving gears 112 includes: a pair of driving gears 112a and 112b, which are connected with the torsion gear 101; a driving gear 112c, which is used to drive these driving gears 112a and 112b synchronously; Common drive gear 112c. The drive shaft of the twist motor 115 is changed by 90 degrees by bevel gears 112d and 112e so as to extend along the support plate 130, and the length (dimension) of the twist motor 115 protruding from the support plate 130 is shortened. In addition, when the first notch 102 rotates and comes between the drive gears 112a and 112b, the pair of drive gears 112a and 112b contact the twist gear 101 on both sides via the first notch 102, and the twist gear can be stably secured. 101 drive. In addition, half of the pair of drive gears 112 a and 112 b in the axial direction contact the torsion gear 101 inside the support plate 130 , and half contact the synchronization gear 112 c outside the support plate 130 . By bringing a plurality of drive gears into contact with the partially missing torsion gear 101 and synchronously driving them, no matter where the missing portion 102 moves, the rotation angle can be controlled with high precision.

In this way, the torsion unit 100 has a torsion unit structure without a torsion shaft: the guide roller 120 is directly supported by the guide roller 120 to be able to rotate and drive within the plate thickness of the support plate 130 having the second notch portion 132 as an open groove. The first opening 105 of the disc penetration hole and the torsion gear 101 as the first notch portion 102 of the open groove for supply and discharge do not have a dedicated torsion shaft. By placing the rotation guide mechanism (guide roller) 120 and the torsion gear 101 within the plate thickness of the support plate 130 in a structure without a torsion shaft, the L dimension (L1) from the end surface of the support plate to the center of the bending axis 11 can be shortened, and the The length between bend points for the final bend where both ends are bent at the same time.

That is, in terms of the length between the bending points of the final bending of the middle part of the pipe, even if the chuck holding part 167 of the final bending enters into the vicinity of the bending axis 11, for example, the Japanese katakana U-shaped bending of 90 degrees on both sides In this case, in order to discharge after bending, the space inside the U-shaped bend in Japanese katakana needs to be greater than or equal to the L dimension, and the length below this length becomes an unbendable region. Therefore, it is possible to shorten the length of the unbendable region in final bending by an amount corresponding to the thickness of the torsion unit 100 without the torsion shaft.

FIG. 21 shows that the chuck unit 160 is pulled out. (a) of FIG. 21 is a front view of the chuck unit 160 and shows a state seen from a direction perpendicular to the second axis 200 . (b) of FIG. 14 is a side view of the chuck unit 160, showing a situation seen from the direction of the second axis 200. As shown in FIG. The chuck unit (pipe chuck) 160 includes: a pair of chuck plates 161 extending along the second axis 200; an opening spring 162 that keeps the pair of chuck plates 161 in an open state; and an opening and closing cylinder 163, which overcomes the opening spring 162 to open and close the pair of chuck plates 161. A pair of chuck plates 161 are supported so as to rotate around the chuck shaft 166 like a pitch, and the rollers 163a move in and out toward the working side 161a of the chuck plate 161 by the opening and closing cylinder 163, so that the chuck plates 161 can be opened and closed. .

The pair of chuck plates 161 protrude in the direction of the second axis 200 (left and right) with respect to the cylinders 163 to 165, and have a concave shape in the center, and the two parts on the left and right sides are used to hold a cylindrical member W such as a pipe. And the holding part 167 of a cylindrical groove is formed. The central portion (middle portion, escaping portion) 168 of the chuck plate 161 is cut in a concave shape to open below the lower surface of the workpiece (pipe) W, and the workpiece can be gripped by the gripping portion 167 at one position on one side. Near the bent portion of W. Therefore, when the workpiece W is changed, the workpiece W can be gripped again by the one gripping portion 167 by avoiding the processed portion by the escape portion 168 .

The entire grip portion 167 protruding to the left and right with respect to the cylinders 163 to 165 is smaller than the central opening 105 of the twist gear 101 . In addition, the torsion drive mechanism 110 of the torsion unit 100 is disposed at the front and rear ends of the support plate 130, and the torsion drive mechanism 110 is disposed on the cylinders 163 to 165 in a state separated from the second axis 200 to the front and rear. The chuck unit 160 and the torsion unit 100 does not interfere at the closest approach. Therefore, when the twist unit 100 is moved closest to the chuck unit 160 by the transport unit 140 , the twist unit 100 is transported to a position where the support plate 130 is close to the cylinders 163 to 165 .

At this time, the holding portion 167 is inserted into the first opening 105 at the center of the twist gear 101 , and basically passes through the support plate 130 and the twist gear 101 . Therefore, the position where the workpiece W is clamped by the chuck unit 160 can be brought close to the position where the bending unit 10 is supported on the side opposite to the support plate 130, and the workpiece W can be bent until it is clamped by the chuck unit 160. Near the living part.

In addition, the workpiece W can be changed (re-gripped) by the bending unit 10 of the one twisting unit 100 closest to the chuck unit 160 . That is, the workpiece W is temporarily held by the upper and lower units (upper and lower dies) 22 and 23 of the bending unit 10 and the pressing member 30, the chuck plate 161 is opened to release the workpiece W, and the chuck plate 161 is moved relative to the second by the retreat cylinder 164. 2 The axis 200 retracts downward, and after the torsion unit 100 is separated from the chuck unit 160 by an appropriate distance, the chuck plate 161 can be raised to grip the workpiece W again. At this time, since the chuck plate 161 includes the escape portion 168 , the portion bent by the other torsion unit 100 can be escaped by the escape portion 168 , and seven workpieces W can be gripped by one gripping portion 16 . Therefore, it is possible to bend the workpiece W while leaving the minimum straight pipe portion (straight portion) required to be gripped by one gripping portion 167 .

FIG. 22 shows the outline of a method (processing method, control method of the processing device) of processing the workpiece W by the processing device 1a using a flowchart. If it is time to supply and discharge the workpiece W in step 211, the supply and discharge control unit 97 of the control unit 90 rotates the twist gear 101 in step 212 to connect the first notch 102 and the second notch 132 of the support plate 130 Aligning in the vertical direction, a supply and discharge passage 139 is provided. Before and after step 212 or at the same time, in step 213, the supply and discharge control unit 97 controls the rotating unit 80 and the bending unit 10, so that the upper mold (the first unit) 23, the lower mold (the second unit) 22 and the pressing member 30 Open in three directions, the supply passage (supply and discharge passage) 139 and the supply and discharge direction (supply and discharge path) 13 become a straight line, and the angle of the bending axis 11 of the bending unit 10 is set so that the workpiece W can enter and exit in the vertical direction . At this time, if necessary, the bending die jig 20 is rotated, and the clamping parts 23b and 22b are retracted to a position where they do not interfere with supply and discharge.

Afterwards, in step 214, the supply and discharge control unit 97 can lift the chuck unit 160 to discharge (unload) the workpiece W from the second axis 200 as the processing position, or supply (set, load) the workpiece W to the second axis 200. W. The workpiece W is supplied and discharged mainly when the workpiece W is set on the processing device 1a to start a series of bending processing on the workpiece W, and when the workpiece W is discharged from the processing device 1 after the series of bending processing is completed. In the processing apparatus 1 in which the turning unit 80 does not have a lift function, the supply and discharge function can be used for switching between right-curve and left-curve.

In step 221, it is determined whether it is time to change the workpiece W. The replacement of the workpiece W is an operation in which the bending process on the left and right sides that can be processed at the initial chucking position of the chuck unit 160 is completed, and the workpiece W is moved to the retracted position by raising the chuck unit 160 in step 211. If the unprocessed part remains within the chuck width after position E, change the unprocessed part within the chuck width to a machinable position outside the chuck width.

If it is necessary to change the timing, the control unit 98 of the control unit 90 controls the bending conveying unit 150. In step 222, any one side of the pair of left and right bending conveying units 150 is set as the bending completion side, and the bending is completed. The unit on the finishing side retracts to a retracted position where no interference occurs when the workpiece W that has been processed on one side is lowered (the position separated from the chuck unit is usually the first bending start position on the distal end side). In step 223, the chuck unit 160 is lowered to the setting center C, and the grip change control unit 98 closes the upper mold 23, the lower mold 22, and the pressure member 30 of the bending unit 10 on the opposite side of the bending completion side, and temporarily holds the Workpiece W.

In step 224 , the grip change control unit 98 temporarily releases the workpiece W from the chuck unit 160 , retracts the chuck plate 161 downward, and adjusts the position of one twisting unit 100 by the transport unit 140 . The position of the twisting unit 100 is controlled so that at least the portion gripped by one gripping portion 167 of the chuck plate 161 becomes a straight pipe, and then, in step 225 , the chuck plate 161 is raised again to grip the workpiece W again. By performing this exchange of grips, it is possible to target substantially the entire area of the workpiece W except for the portion gripped by one gripping portion 167 .

If the feeding and discharging and changing of grips are completed or there is no such need, then in step 200, the position control unit 93 and the processing control unit 95 of the control unit 90 move the twisting units 100 of the two according to the processing data 91, and the predetermined position of the workpiece W is adjusted. Carry out predetermined bending processing. In step 230, it is confirmed whether the bending process is completed, and if the next process including the supply and discharge process remains, the process returns to step 211 to repeat the above-mentioned processes.

Each process of the bending process in step 200 includes steps 201 to 209 of the processing method described with reference to FIG. 11 . That is, in step 201, the position control unit 92 controls the mold opening and closing mechanism 60, so that the upper mold 23, the lower mold 22, and the pressing member 30 are opened in three different directions around the set center C, and the workpiece is released. W. And, the pair of twisting units 100 are installed at the position of the next bending process by the conveying units 140 on both sides. When the twisting unit 100 reaches the point of bending, the machining control unit 95 judges the machining mode, and the chuck unit 160 and the twisting unit 100 move relatively in a linear direction to set the workpiece W at the set center C. Thereafter, processing of each of the modes M1 to M4 is performed. At this time, if it is necessary to control the bending direction, the twist gear 101 of each twist unit 100 is rotated by a predetermined angle. In each torsion unit 100, since the rotation angle of the torsion gear 101 can be independently controlled, the angle of the bending axis 11 of each bending unit 10 can be independently controlled, and bending can be performed independently from both ends.

In addition, when processing in each processing mode, if the mode is different from the previously performed bending processing, the processing control unit 95 uses the rotation unit 80 to raise and lower the bending unit 10 as described above, and changes the relative position of the bending unit 10. Processing of the orientation of the workpiece W. After processing in step 209, return to the flow shown in FIG. 22 .

The control unit 90 for controlling the processing method (control method) can be realized by using computer resources including a CPU and a memory similarly to the above-mentioned control unit 9, and the processing method (control method) can be recorded in an appropriate recording medium as a program (program product). to provide.

With this method, the center (near the middle portion) of a rod-shaped workpiece W such as a pipe is clamped by the chuck unit 160, and the workpiece W can be processed into various shapes while the twisting unit 100 is conveyed from both ends of the workpiece W toward the center. shape. In particular, in the processing device 1a, two sets of rotary bending units (twisting units) 100 are coaxially arranged to face each other, and the vicinity of the middle part of the pipe is held by the pipe chuck 160, and the rotating bending units 100 are sequentially moved from both end sides toward the middle part. Bend both ends at the same time. In addition, in this processing device 1a, the process of changing the clamping die using the bending die jig 20 of the bending unit 10 is prepared, and the length of the unbendable region in the middle portion can be shortened without adding an auxiliary chuck or a pipe chuck without retreating from the pipe axis. .

In addition, the processing device 1 is a simultaneous bending device at both ends, and has a structure in which two sets of bending and conveying units 150 are coaxially arranged opposite each other around the pipe chuck 160 provided near the center of the stand 2. , the bending unit 10 is provided on the side opposite to the pipe chuck 160 via each support plate 130 . In addition, the holding portion 167 of the pipe chuck 160 can be inserted into the opening (chuck penetration hole) 105 of the twist gear 101 . Therefore, the chuck 160 can be brought close to the bending unit 10, and the length of the unbendable region of the workpiece W can also be shortened at this point.

At the beginning of the bending operation, the gripping parts 167 on both sides of the chuck plate 161 are used to grip the vicinity of the bending points at the intervals between the bending points that can be finally bent with approximately the same amount of bending on the left and right sides of the pipe W. Bending in a range that does not interfere with the chuck plate 161 is simultaneously performed at both ends while moving in the direction. Any one side bent at the initial holding position is defined as the bending completion side, and the vicinity of the final bending point on the bending completion side is switched to the holding portion 167 on the opposite side of the chuck plate 161 . By changing the grip, the bending point remaining within the chuck width at the initial clamping position is moved to a bendable position outside the chuck width, and the remaining bending is performed.

It is also possible to perform the hand-changing process of steps 222 to 225 including the supply and discharge process. That is, first, the upper die 23, the lower die 22, and the presser 30 of the bending unit 10 are opened in three directions, and the bending transport unit 150 is clamped along the bend in order to allow the pipe W to be bent next to rise. Micro-feeding (Japanese: inch sending り) in the direction and rotation avoidance of the clamping parts 23b and 22b, twisting back so that the center of the open groove 102 of the twist gear 101 is in a vertical position. Next, the pipeline W is raised above the upper surface of the support plate 130 of the twisting unit 100 using the lifting cylinder 165 and the retracting cylinder 164, and then the bending transfer unit 150 on the side where the bending is completed is retreated to a position where it does not interfere with the pipeline W. The position is then lowered to the bending processing height again, and then the bending die jig 20 of the bending transport unit 150 on the side where the remaining bending is performed is returned to the bending start position to hold the pipe W. The chuck plate 161 is opened by the opening and closing cylinder 163, and retracted downward by the retraction cylinder 164, and then the curved conveying unit 150 holding the pipe W is retracted by the amount of the gripping stroke, and the chuck plate 161 is returned to the original position. The pipe W is clamped again by bending the pipe W so that the vicinity of the final bending point on the side where the bending is completed can be changed to the gripping portion 167 on the opposite side of the chuck plate 161 .

Since the above grip change is carried out using the fixture function of the bending unit 10, the delivery function of the delivery unit 140, the chuck function and the lifting function of the pipe chuck 160, which are required for pipe bending, there is no need to add a new grip for the grip change. Mobile mechanism just can carry out.

In addition, when the bending path of the bending completion side after both ends are simultaneously bent is from the horizontal to the downward direction and interferes with the retreat of the bending transport unit 150 or the chuck plate 161, by setting the initial chuck position at The bending point without interference, or using the twisting function of the rotary bending unit 100 to add a twisting action to change the twisting direction of the pipe before the initial bending can avoid the interference of changing the grip.

These processes can be automatically performed based on the flag indicating the grip-changing point and the processing data 91 including grip-changing stroke data.

In this way, the processing device 1a includes: a rotary bending unit (twisting unit) 100, which shortens the length of the unbendable region where both ends are bent at the same time and the middle part is finally bent by using a structure without a twisted shaft, and can perform linear path supply and discharge; and an overhang The chuck-type chuck unit 160 holds the vicinity of the bending portion and can be raised and lowered, and is exchanged using the gripper function and the transfer function of the bending transfer unit 150 required for pipe bending. Therefore, the non-bendable region of the middle portion can be shortened without adding a retracting mechanism for the pipe chuck 160 in the direction of travel from the bending transport unit 150 , a lifting/retracting mechanism for the rotary bending unit 100 , an auxiliary chuck, and the like. Thus, the processing device 1a is a device in which both ends are bent at the same time, and the structure can be simplified. In addition, in this processing apparatus 1a, continuous bending processing in which rotation bending (three-dimensional bending) is mixed (combined) in the left-right bending direction and the stretch bending method can be performed.

23 to 28 show different examples of the twist unit 100 . The twisting unit 100 is equipped with a bending unit 10 dedicated to left-handed bending. Since switching between left and right bending is unnecessary, the bending unit 10 omits the rotating unit, and is directly attached to the torsion gear 101 with the first axis (bending axis) 11 inclined by the connecting plate 81 . Therefore, the structure of the torsion unit 100 is further simplified, the distance L1 between the support plate 130 and the bending axis 11 becomes shorter, and the unbendable region of the middle portion of the workpiece W can be further shortened.

FIG. 23 is a front view of the twisting unit 100 , FIG. 24 is a side view of the twisting unit 100 , and FIG. 25 is a top view of the twisting unit 100 .

FIG. 26 is a plan view showing the bending unit 10 dedicated to stretch bending mounted on the torsion unit 100 with extraction. FIG. 27 is a cross-sectional view of a bending unit 10 dedicated to stretch bending, which includes a mold opening and closing motor 61 and a stretch bending motor 41 . The structure of the upper mold (first unit) 23, the lower mold (second unit) 22, and the mold opening and closing mechanism 60 of the presser 30 is shared. Therefore, as shown in (a) and (b) of FIG. 28 , the upper mold 23 , the lower mold 22 , and the pressing member 30 are aligned with the second axis 200 by using the mold opening and closing mechanism 60 and the pressing member swing mechanism 70 . Open and close in 3 directions as the center. Therefore, by opening the upper mold 23, the lower mold 22, and the press member 30, and rotating the bending mold jig 20 including the upper mold 22 and the lower mold 23 to a position where the clamping portion 23b does not interfere, it is possible to The discharge path) 13 supplies and discharges the workpiece W.

In addition, the conveyance unit 140 of the processing apparatus 1a shown above is an example of a ball screw, but the conveyance motor 145 may be provided in the rotary bending unit 100 side as a rack-and-pinion mechanism. In addition, the lift cylinder 165 and the retraction cylinder 164 of the chuck unit 160 may be electric sliders that can correspond to both strokes.

As described above, the processing device 1a shortens the non-bendable region of the middle part by using a simple device structure, and can efficiently process long pipes with high precision and high speed by using short-distance linear path supply and discharge and one-way transportation with a fixed pipe axis. Both ends of the workpiece W of the bar-shaped member are simultaneously bent. In addition, by including the left and right stretch bending unit 10 and the quick turn unit 80 , it is possible to efficiently perform mixed bending of left and right stretch bending and pressure bending when the axis of the pipe is fixed.

In addition, the processing device 1a can bend the small-diameter and long-length pipes with high precision by twisting the pipes at a high speed so that the shape deformed by the bending process by the inertial force can eliminate the twisting of the pipes so that the side of the bending unit 10 can be aligned with the pipes. Pipes are processed by the so-called rotary bending method that rotates around the axis. Use the pipe chuck 160 to hold the vicinity of the middle part of the pipe, and use two sets of rotating bending parts 100 and conveying parts 140 arranged on both sides of the pipe chuck 160 opposite to the pipe axis to make the bending part face from the end side of the pipe. Bending is performed sequentially while the middle part is moving. In this processing device 1a, both ends are rotated and bent at the same time, so that there is no deformation caused by the torsion of the pipe, and the bending swing length can be halved by bending at both ends, and the wave caused by bending can also be reduced. ) caused out of shape. Therefore, it is possible to perform bending of a small-diameter and vertically-long pipe with high precision in a short time by simultaneous bending at both ends with increased twisting speed and bending speed.

In addition, in the above-mentioned conventional bending method, when supplying and discharging pipes to the bending part, the opening direction of the semicircular groove for bending forming of the upper and lower integral bending molds and the center of the opening groove for supply and discharge of the twisting mechanism are in the right angle direction, so it is necessary to The movement of vertically lifting and lowering the pipe supply and discharge path in the open groove for supply and discharge and the movement in two directions in the horizontal direction entering the semicircular groove of the bending mold have the disadvantages of longer supply and discharge time and complicated supply and discharge mechanism question.

In addition, in the torsion structure of the rotary bending unit, since the torsion shaft (torsion plate) supporting the rotation of the bending unit and the torsion gear for rotation driving are independent, and the torsion gear is arranged outside the support plate, the distance from the end surface of the support plate to the bending axis is independent. The distance between the centers becomes longer by a corresponding amount, and there is a disadvantage that the unbendable region of the middle portion that is bent last in the simultaneous bending of both ends becomes longer. In the absence of a retraction mechanism for the pipe chuck from the bending unit’s conveying direction, the non-bendable region of the middle part and the end surface of the support plate become more than twice the distance between the centers of the bending axis and the sum of the width of the pipe chuck mechanism. Deals with bends with short bend intervals. In order to shorten the unbendable area of the middle part, it is also possible to provide a mechanism for retracting the pipe chuck from the axis of the pipe, other auxiliary chucks that hold the pipe when the pipe chuck retracts, and a lowering and retracting mechanism for the bending mechanism on one side, etc. , but there is a problem that the device structure becomes complicated. In addition, even when such a retraction mechanism is provided, the bending point interval of the final bending portion needs to be about the distance from the center of the bending axis of the end surface of the support plate.

The above-mentioned processing device 1a can solve these problems, use a simple structure to shorten the length of the non-bendable region in the middle of the pipe, and can provide a bending method that uses a straight line path in a direction perpendicular to the axis of the pipe and one-way transportation to shorten the processing time. processing device.

In addition, in the case of automatic supply and discharge, it is sufficient to position the workpiece W such as a pipe in the axial direction and the rotational direction by the positioning unit before supply, and supply it to the bending device of the present invention while maintaining its position. In the case of manual supply and discharge, it is sufficient to provide a pipe positioning unit movable in the axial direction on the reference end side.

In addition, in the above, an example of a processing apparatus having a pair of twisting units 100 arranged so as to face each other across the chuck unit 160 was shown, but a single twisting unit 100 arranged on one side of the chuck unit 160 may also be used. end bending device.

The processing device 1a disclosed above uses a simple structure that can perform linear path supply and discharge and pipeline axis fixed one-way transportation, and reduces the number of drivers to make the rotary bending unit small and lightweight. By twisting and transporting on the side of the rotary bending unit, When the pipe is fixed, both ends are bent at the same time, and the bending caused by the increase of the swing length and the deformation caused by the inertia force of the pipe torsion can be suppressed, and the high-precision high-speed bending process can be made, and the pipe chuck The grip part can pass through the through hole of the bending mechanism and its torsion gear without the torsion shaft and the short unbendable area can shorten the unbendable area of the middle part which is the weak point of simultaneous bending of both ends.

As described above, the processing unit and the processing apparatus of the present invention are not limited to the above-mentioned embodiments at all, and can be implemented in various forms within a range not departing from the gist of the present invention.

Claims (19)

1. A processing unit wherein, The processing unit includes: The first unit has a first split mold part on the upper side of the upper and lower pair of split mold parts and a first clamping part on the upper side of the upper and lower pair of clamp parts, and the upper and lower pair of split mold parts have a pair of a curved groove for bending the rod-shaped member, and the upper and lower pair of clamping parts are used to hold the rod-shaped member inserted into the curved groove; The second unit includes a second split mold part on the lower side of the pair of upper and lower split mold parts and a second clamping part on the lower side of the pair of upper and lower clamping parts; a pressing member having a holding groove for holding a rod-shaped member in the curved groove from an outer peripheral side of the curved groove; and An opening and closing unit for setting the first unit, the second unit, and the pressing member relative to the central axis of the rod-shaped member in the state of being attached to the bending groove at a center of 3 Open and close in different directions. 2. The processing unit according to claim 1, wherein, The opening and closing unit includes: a first opening and closing unit for opening and closing the first unit and the second unit in a balanced manner; and The second opening and closing unit is used to move the pressing member away from or close to the set center in conjunction with the first opening and closing unit. 3. The processing unit according to claim 2, wherein, The second switch unit includes: a skirt-shaped cylindrical cam that moves up and down in conjunction with the first opening and closing unit; and The cam follower moves while contacting the peripheral surface of the skirt-shaped cylindrical cam, and the skirt-shaped cylindrical cam moves up and down to open and close in conjunction with the first unit and the second unit. The pressure piece moves relative to the curved groove in such a way that the pressure piece opens and closes. 4. A processing unit according to claim 2 or 3, wherein, The first opening and closing unit includes a first opening and closing shaft for moving the first unit up and down, a second opening and closing shaft for moving the second unit up and down, and a second opening and closing shaft for moving the first opening and closing unit up and down. The closing shaft and the second opening and closing shaft are left and right screw members that move in opposite directions up and down, and an opening and closing motor for rotating the left and right screw members. 5. A processing unit according to any one of claims 2 to 4, wherein The second switch unit includes: a holder that supports the pressing member so that the pressing member swings relative to the first opening and closing shaft and the second opening and closing shaft; and The support part supports the holder so as to be rotatable with respect to the first opening and closing shaft and the second opening and closing shaft. 6. A processing unit according to any one of claims 1 to 5, wherein The pressing member includes a pressing roller including the holding groove having an arcuate portion, The processing unit includes: a first drive unit that rotates around a first axis in a state in which the first unit and the second unit are closed; and A second drive unit that rotates independently of the first drive unit around the first axis in a state in which the presser is closed. 7. A processing unit according to claim 6, wherein, The pressing member includes a pressing member disposed at least one of left and right. 8. A processing unit according to claim 7, wherein, The second drive unit includes an opening and closing cam follower for opening and closing at least one of the pressurizing members, and an opening and closing cam follower that rotates around the first axis to close the opening and closing cam follower. Tilt barrel cam. 9. A processing unit according to any one of claims 1 to 8, wherein The upper and lower pair of clamping parts are common clamping parts for left and right bending with clamping grooves intersecting in the shape of a letter X. 10. A processing device wherein, The processing unit includes: The processing unit according to any one of claims 1-9; a workpiece supporting unit for supporting the bar-shaped member; and a moving unit for moving at least one of the processing unit and the workpiece supporting unit, performing setting of the central axis of the unprocessed portion of the bar-shaped member supported by the workpiece supporting unit on the processing unit The first operation of setting the center and the second operation of setting the central axis at a retracted position away from the setting center. 11. The processing apparatus of claim 10, wherein: The moving unit relatively moves the central axis of the unprocessed portion of the bar-shaped member supported by the workpiece support unit linearly in a first direction between the set center and the retracted position, so that the The processing unit is supported such that the opening and closing directions of the first unit and the second unit are inclined relative to the first direction. 12. The processing device according to any one of claims 10 or 11, wherein, The processing unit includes a mechanism for bending the bar-shaped member to either left or right, and the moving unit includes a first moving unit for moving the processing unit up and down and swinging left and right. 13. The processing device of claim 12, wherein: The first mobile unit includes: base; a holder that swings relative to the base; a slide plate supporting the machining unit in a manner to slide up and down within the holder; The first cam groove is arranged on the base and is in the vertical direction; a second cam groove provided on the sliding plate in a direction perpendicular to the direction in which the sliding plate slides; a rotating gear having a rotating roller moving inside the first cam groove and the second cam groove; and The rotation motor is held by the holder and is used to drive the rotation gear to rotate the rotation gear. 14. A processing device wherein, The processing device has the processing unit according to any one of claims 1 to 9 and a torsion unit that supports the processing unit in a manner to rotate around a second axis passing through the setting center, The torsion unit includes: a torsion gear, which is annular and used to support the processing unit, and has a first notch partially cut toward the center; a torsion drive unit for driving said torsion gear; a plurality of guide rollers supporting the outer peripheral surface of the torsion gear so that the torsion gear rotates about the second axis; and a support unit for supporting the plurality of guide rollers, The supporting unit includes: a second opening, centered on said second axis, larger than the first opening in the ring of said torsion gear; and The second notch, which reaches the second opening, opens in a direction perpendicular to the second axis, and, In this machining device, the plurality of guide rollers are disposed facing the second opening, and at least a part of the torsion gear is supported so that at least a part of the torsion gear rotates in the second opening. 15. The processing device of claim 14, wherein: The processing device has: a chuck unit supporting an unprocessed portion of a bar-shaped member on a side opposite to the processing unit along the second axis via the supporting unit; and a conveying unit relatively controlling the distance between the chuck unit and the supporting unit, The chuck unit has a workpiece gripping portion extending along the second axis, and the workpiece gripping portion penetrates the first opening when the distance between the support unit and the chuck unit is close. 16. A method wherein, The method includes the step of bending a rod-shaped member using a processing device having a processing unit, The processing unit includes: A pair of upper and lower parting mold parts, which have curved grooves; a pair of upper and lower clamping parts for holding the rod-shaped member inserted into the curved groove; and a pressing member having a holding groove for holding a rod-shaped member in the curved groove from an outer peripheral side of the curved groove, The method includes the steps of: Before the bending process, the split mold part on the upper side and the clamping part on the upper side, the split mold part on the lower side and the clamping part on the lower side, and the clamping part on the lower side The press piece is installed in a state in which the bar-shaped member relatively linearly moves relative to the setting center of the position of the central axis of the bar-shaped member installed in the bending groove in three different directions. in the center of the setting. 17. The method of claim 16, wherein, Said setup includes the steps of: The processing unit is tilted, and the rod-shaped member is moved in a straight line to be supplied and discharged in a left and right curved common path, Described bending process comprises such steps: The rod-shaped member provided at the set center is bent left and right at the set center. 18. The method of claim 16, wherein, The processing device has a torsion unit supporting the processing unit in a manner to rotate around a second axis passing through the setting center, The torsion unit includes: a torsion gear, which is annular and used to support the processing unit, and has a first notch partially cut toward the center; a torsion drive unit for driving the torsion gear; and a support unit for rotatably supporting the torsion gear, the support unit having a second opening centered on the second axis and larger than the first opening in the ring of the torsion gear, and reaching the second opening and a second notch open in a direction perpendicular to the second axis, The processing device also includes: a rotation unit for inclining an installation angle of the machining unit with respect to the twist gear with respect to a direction of the first notch; and a chuck unit that supports an unprocessed portion of a bar-shaped member on a side opposite to the processing unit along the second axis via the support unit, The method includes the steps of: prior to the setting, the twist drive unit rotates the twist gear so that the first cutout and the second cutout are aligned; and The rotation unit sets the installation angle to a direction in which the first unit, the second unit, and the pressing member are opened to release the rod-shaped member and the first notch and the second notch. The direction of the two parts becomes a linear mounting angle, Said setup includes the steps of: The chuck unit and the torsion unit are relatively moved in the linear direction to place the rod-shaped member on the second axis. 19. The method of claim 18, wherein, The processing device further includes a conveying unit relatively controlling a distance between the chuck unit and the supporting unit, The chuck unit includes a workpiece holding portion extending along the second axis, The method includes the steps of: Before the bending process, the transport unit closes the distance between the support unit and the chuck unit, and the workpiece holding portion penetrates the second opening; and When the rod-shaped member is gripped by the processing unit, the conveyance unit separates the distance between the support unit and the chuck unit, and the workpiece gripping portion grips the rod-shaped member again.