JP2865260B2 - Tubing clamping device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention is mainly applied to a case where an end portion of a steel pipe is fixedly held when a groove is formed on the end face of the steel pipe. A transfer end portion of a work transfer device for transferring a pipe to be processed (including a cylindrical body as well as a tubular body, hereinafter referred to as a work) along its axial direction, and a processing machine for processing an end of the work. The present invention relates to a clamp device that is installed between the two and fixedly holds an end of a work.

(Prior Art) Conventionally known clamp devices of this type include: (A) a lower clamp having a flat clamp surface 1a that makes point contact with a lower peripheral surface of a work W as shown in FIG. By using a block 1 and an inverted V-shaped upper clamp block 2 having oppositely inclined clamp surfaces 2a and 2b which are in point contact with the left and right sides of the upper peripheral surface of the work W, respectively, (B) clamped at three points P1, P2, and P3; and (B) V is placed at mutually opposing positions as shown in FIG.
The work W is clamped at four points P1, P2, P3, and P4 on the peripheral surface thereof using a pair of left and right clamp blocks 3 and 4 that form the clamp surfaces 3a, 3b and 4a, 4b of the shape. There is, and.

(Problems to be Solved by the Invention) Among the above-described conventional tubing clamping devices, (A)
Since the shape of the upper clamp block 2 is not changed, the three clamp points P1, P2, and P3 are changed to the outer peripheral surface of the work W as shown in FIG. When the workpiece W is displaced along
The force applied to each of the clamp points P1, P2, and P3 becomes non-uniform, and as a result, there is a problem that the work W is deformed, or the fixing is unstable, and the intended end processing cannot be performed as predetermined. .

In the case shown in (B), although a stable clamped state can be obtained regardless of the change in the diameter of the work W, the center position of the work W at the time of clamping is the same regardless of the difference in the diameter of the work W. Since the height is constant as shown in FIG.
When the work W is carried into the clamp device, a device that raises and lowers the work W itself and aligns the center is required, which has a disadvantage that the configuration of the entire device is complicated and large.

The present invention has been made in order to solve the above-described problems, and applies a uniform force to three equally dividing points on the outer periphery of the work regardless of a change in the diameter of the work W, thereby causing deformation of the work. An object of the present invention is to provide a clamp device for pipes that can securely and stably clamp without requiring a centering device and can simplify the entire structure.

(Means for Solving the Problems) In order to achieve the above object, a tubing clamping device according to the present invention is provided with a pair of right and left clamp blocks having equal clamping angles with respect to a horizontal plane and mutually oppositely inclined clamping surfaces. And a clamp block driving mechanism for moving the pair of left and right clamp blocks in the horizontal direction at equal speeds and in opposite directions to each other, a lower clamp block incorporated at a central position in a lower portion of the device, and the lower clamp block. An elevating drive mechanism for driving up and down with respect to the transport surface of the pipe transport device, and at a plurality of locations appropriately spaced in the transport direction of the pipe transport device, the left and right sides of the lower peripheral surface of the pipe to be processed are provided. A pair of arms capable of contacting both sides, a left and right arm lifting mechanism for individually lifting and lowering the pair of left and right arms, and a left and right arm for simultaneously lifting and lowering the pair of left and right arms A centering device consisting of a right arm simultaneous lifting mechanism is installed.

According to the present invention, the work is transferred onto the lower clamp block by raising the lower clamp block in a state where the work is transported to the predetermined processing position via the transport device. By horizontally moving the pair of right and left clamp blocks horizontally at equal speeds in a direction approaching each other via a driving device, the three clamp surfaces of the pair of left and right clamp blocks and the upper surface of the lower clamp block are inclined. The points abut on the outer peripheral surface of the work respectively to clamp the work. Therefore, a uniform force can be applied to the three points regardless of a change in the diameter of the work, and the work can be stably bent without deforming the work. Also,
When the work has a bend or the like, by vertically moving the pair of left and right arms individually or simultaneously moving the pair of left and right arms up and down, the center of the work and the height of the work can be freely adjusted.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is an overall schematic plan view of a pipe groove processing equipment including a clamp device according to an embodiment of the present invention, and FIG.
It is a side view of a figure.

1 and 2, reference numeral 10 denotes a groove processing machine, which is provided with a rotating face plate 12 on which a groove processing tool 11 is mounted so as to be movable up and down. Reference numeral 20 denotes a roller conveyor (an example of a conveying device) that conveys a pipe W, which is an example of a work, along an axial direction thereof.
A plurality of drum-shaped rollers 22 are arranged on an underframe 21, and these rollers are
22 is linked to a motor 24 via a chain 23.

Reference numeral 30 denotes a pipe clamp device, which is provided between the conveyance end portion of the roller conveyor 20 and the groove making machine 10 to fix and hold an end of the pipe W. This pipe clamp device
Details of 30 will be described later.

Reference numeral 50 denotes a chain conveyor for feeding the pipe W. A multiplicity of strips are provided on one side of the roller conveyor 20, and the pipe W is fed in the arrow X direction together with the fixed guide rail 51 for feeding and the kick-in device 52. , And is configured to be supplied onto the roller conveyor 20. 53 is a kick-out device, 54 is a fixed delivery guide rail, and discharges the pipe W after groove processing from the roller conveyor 20 to the other side of the roller conveyor 20 in the direction of arrow Y from above. It is configured.

Reference numeral 60 denotes a centering device, which is installed at a plurality of locations below the underframe 21 of the roller conveyor 20 at appropriate intervals in the pipe conveying direction by the roller conveyor 20. Details of the centering device 50 will also be described later.

3 and 4 are a partially cutaway front view and a partially cutaway side view showing the detailed structure of the pipe clamp device 30. At the same time, 31L and 31R are a pair of right and left clamped bunlocks, Angle of inclination θ1, θ2
And have clamping surfaces 31l and 31r that are opposite to each other. 32U and 32D are trapezoidal screws which are supported on the upper and lower sides of the clamp device underframe 33 in a horizontal posture, respectively.The trapezoidal screws 32U and 32D are formed with left and right portions formed with reverse screws across their central portions. These upper and lower trapezoidal screws
Left and right movable frames 35L, 35R holding nut members 32Ul, 34Ur and 34Dl, 34Dr respectively screwed on left and right reverse screw portions 32Ul, 32Ur and 32Dl, 32Dr of 32U, 32D at upper and lower ends are upper end portions of the underframe 33. And guide rails 36U and 36D fixed to the lower end
Is supported movably in the horizontal direction. The left and right movable frames 35L and 35R are mounted on the pair of left and right clamp blocks.
31L and 31R are fixed.

Reference numeral 37 denotes a hydraulic motor, which is disposed at an upper and lower intermediate position on one side of the underframe 33. The hydraulic motor 37 is connected to the upper and lower trapezoidal screws via sprockets 38U, 38D and chains 39U, 39D. 32U and 32D are interlockingly connected, and a clamp block driving mechanism for horizontally moving the pair of left and right clamp blocks 31L and 31R at equal speeds and in opposite directions in the left and right directions is constituted by the above components.

In FIGS. 3 and 4, reference numeral 40 denotes a lower clamp block, which is arranged at the center of the lower side of the underframe 33, and which receives a transfer surface of the roller conveyor 20 via a hydraulic cylinder 41. It can be driven up and down freely.

5 and 6 are a front view and a side view showing a detailed structure of the centering device 60. In FIG.
61R is a pair of left and right arms that can swing up and down individually around the support shaft 62 arranged on a vertical line including the center 0 of the pipe W, and can contact the left and right sides of the lower peripheral surface of the pipe W Is configured. 63L and 63R are double-acting hydraulic cylinders that make up the left and right arm lifting mechanisms, with movable piston rods
The upper ends of 63l and 63r are pivotally connected to an intermediate portion between the pair of left and right arms 61L and 61R so that the pair of left and right arms 61L and 61R can be individually driven up and down.

Reference numeral 64 denotes a single-acting hydraulic cylinder mounted on the underframe 21 of the roller conveyor 20, and a bracket 65 for holding the support shaft 62 is fixed to the upper end of a movable piston rod 64a. A left and right arm simultaneous elevating mechanism that simultaneously elevates the pair of left and right arms 61L and 61R by expansion and contraction is configured.

 Next, the operation of the above configuration will be described.

A pipe W disposed on one side of the roller conveyor 20 is guided by a guide rail 51 via a chain conveyor 50 and a kick-in device 52, is fed in the direction of arrow X in FIG. 1, and is supplied onto the roller conveyor 20. Then, with the driving of the roller conveyor 20, the roller is conveyed to a predetermined groove processing position along the pipe axis direction.

The tip of the pipe W conveyed as described above is a pair of left and right clamp blocks 31L in the pipe clamp device 30,
The pipe is clamped at three points on the outer peripheral surface by the 31R and the lower clamp block 40. This pipe clamp operation will be described in more detail.

That is, at the time when the pipe W is conveyed to the predetermined groove processing position by the roller conveyor 20 and stopped, by raising the lower clamp block 40 slightly above the conveying surface of the roller conveyor 20 via the hydraulic cylinder 41,
The tip of the pipe W is transferred from the roller conveyor 20 onto the lower clamp block 40.

Next, the hydraulic motor 37 is operated, and its rotational force is transmitted to the upper and lower trapezoidal screws 32U, 32D via the sprockets 38U, 38D and the chains 39U, 39D, and the trapezoidal screws 32U, 32D are driven and rotated, whereby: The pair of left and right clamp blocks 31L, 31R fixed to the left and right movable frames 35L, 35R are horizontally moved in the direction approaching each other at an equal speed, and the clamp surfaces 31l, 31r having mutually opposite inclinations and the lower clamp described above. Block 4
The three points with the upper surface of 0 abut on the outer peripheral surface of the pipe W, respectively, and clamp the pipe W. At this time, the three clamp points P1, P2, and P3 on the outer peripheral surface of the pipe W by the clamp blocks 31L, 31R, and 40 are set even if the outer diameter D of the pipe W is different as shown in FIG. 3 equally divided points in the direction, and therefore, regardless of the pipe diameter, 3 equally divided points P1, P2, P3 in the circumferential direction
Can be applied uniformly, and even if a strong clamping force is applied, the pipe W can be securely and strongly clamped without causing deformation of the pipe W.

After the completion of the above clamping operation, the beveling machine is used in response to the change in the pipe center position due to the difference in the diameter of the pipe W.
By moving the rotating face plate 12 up and down so that the pipe center matches the groove processing center, the groove processing machine
By the operation of 10, the end face of the pipe W is grooved as specified.

After the groove processing, the unclamped pipe W is conveyed backward by the roller conveyor 20 to a position where the tip of the pipe W is separated from the clamp device 30, and then the kick-out device 53
Is kicked out in the direction of arrow Y in FIG. 1 and discharged to the other side of the roller conveyor 20.

In the above series of operations, the pipe W to be grooved is
If there is a bend in the left arm 61L or the right arm 61R via the double-acting hydraulic cylinder 63L or 63R when the tip of the pipe W is carried into the clamp device 30,
Is individually raised to correct the core of the pipe W to the left or right so that the open end face of the pipe W and the groove machine 10 are perpendicular to each other, and the desired groove processing is performed accurately. Can do well.

Further, by simultaneously raising or lowering the pair of left and right arms 61L and 61R via the single-acting hydraulic cylinder 64,
The core height of the pipe W can also be adjusted.

(Effects of the Invention) As is apparent from the above description, according to the present invention, a uniform force can be applied to three points on the outer peripheral surface of the work regardless of the diameter of the work. Can be stably clamped without deformation. In addition, even if the work has a bend as a whole, the core and the height of the core can be easily adjusted, so that the effect of improving the accuracy of the intended end processing can be achieved. . Moreover, when loading the work,
According to the diameter of the work, a special device for raising and lowering the work is not required, and the structure of the entire device can be simplified.

[Brief description of the drawings]

FIG. 1 is an overall schematic plan view of a pipe beveling equipment according to one embodiment of the present invention, FIG. 2 is a side view of FIG. 1, and FIG. 3 is a partially cutaway front view showing a detailed structure of a pipe clamp device. Fig. 4, Fig. 4 is a partially cutaway side view of Fig. 3, Fig. 5 is a front view showing a detailed structure of the centering device, Fig. 6 is a side view of Fig. 5, and Fig. 7 is a pipe clamp state. 8 and FIG. 9 are schematic front views of a conventional example. 10 ... beveling machine, 20 ... roller conveyor (work transfer device), 31L, 31R ... a pair of left and right clamp blocks, 31
l, 31r …… Clamp surface, 32U, 32D …… Trapezoidal screw, 37 …… Hydraulic motor, 40 …… Lower clamp block, 41 …… Hydraulic cylinder, 60 …… Centering device, 61L, 61R …… Arm, 63L, 63R …… Double acting hydraulic cylinder, 64 …… Hydraulic cylinder.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Seiki Tateishi 1-2-2, Terauchi, Toyonaka-shi, Osaka Inside Kusakabe Machine Co., Ltd. (72) Inventor Yasuhiko Kawabata 1-2-2, Terauchi, Toyonaka-shi, Osaka No. Kusakabe Machine Co., Ltd. (56) References JP-A-57-163034 (JP, A) (58) Field surveyed (Int. Cl. ⁶ , DB name) B23Q 3/06

Claims (1)

(57) [Claims] An object of the present invention is provided between a transfer end of a pipe transfer device for transferring pipes to be processed along an axial direction thereof and a processing machine for processing an end of the pipes to be processed. A clamp device for tubing for fixing and holding an end of tubing, comprising: a pair of right and left clamp blocks having an equal angle with respect to a horizontal plane and having mutually oppositely inclined clamp surfaces; A clamp block driving mechanism for moving at equal speed in the direction and in opposite directions to each other, a lower clamp block incorporated at a central position of a lower portion of the device, and the lower clamp block with respect to a transport surface of the pipe transport device. A pair of arms capable of contacting the left and right sides of the lower peripheral surface of the pipe to be processed at a plurality of locations appropriately spaced in the transport direction of the pipe transport device. When Left and right arm lifting mechanism for raising and lowering the pair of right and left arms individually clamping device tubing have established centering device comprising a lateral arm co-lift mechanism for simultaneously elevating the pair of right and left arms.