JP5082679B2 - Machine tool system - Google Patents

Description

  The present invention relates to a machine tool system including a machine tool that processes a workpiece that is gripped and rotated by a spindle chuck with a tool, and a loader that loads the workpiece into the spindle chuck of the machine tool.

  In the above machine tool system, when a workpiece is loaded into a spindle chuck of a machine tool such as a lathe by a loader, it is confirmed whether or not the workpiece is properly seated on the spindle chuck. As the seating confirmation means, for example, an air discharge port is provided on a locating surface perpendicular to the spindle axis of the main spindle chuck, and the back pressure of the air supply path following the air discharge port is detected, so that the workpiece is placed on the locating surface. Many air type devices that determine whether or not the front end surface is in contact are employed (for example, Patent Document 1). When seating confirmation is performed by such seating confirmation means, for a workpiece in which a convex portion and a concave portion are provided around the center of the workpiece on the tip surface, the seating confirmation means and the convex portion of the workpiece tip surface are It is necessary to adjust the phase. Further, in a machine tool such as a lathe, phase alignment is also required when machining with a rotary tool such as a drill in a state where the rotation of the spindle is stopped. Conventionally, this phase alignment is generally performed by a dedicated phase alignment device provided outside the apparatus (for example, Patent Document 2).

As an example in which a dedicated phase matching device is not used, for example, Patent Document 3 is cited. What is disclosed in this document is that a work pressing member that can press the end face of a work on the spindle is attached to a jig body mounted on a tool selection turret of a lathe so that the work can be rotated and moved back and forth, and temporarily attached to the spindle. The workpiece pressing member is pressed against the end surface of the workpiece and the main shaft is rotated at a low speed so that the positioning stopper provided on the main shaft engages with the engaged portion formed on the end surface of the workpiece and performs phase alignment. It is.
Japanese Patent No. 3456341 JP 2003-80435 A Japanese Utility Model Publication No. 6-46807

  In the above conventional phase alignment method, the method using the dedicated phase alignment means requires a phase alignment device separately from the machine tool and the loader, so that the cost is high. In the method described in Patent Document 3, it is necessary to replace the workpiece pressing member in accordance with the size and shape of the workpiece, and the line stop time may be prolonged due to the setup work.

An object of the present invention is to provide a machine tool system capable of accurately and quickly phasing workpieces with a simple mechanism provided in a machine tool and a loader without installing a dedicated device outside the machine.
Another object of the present invention is to make it possible to confirm the seating of the workpiece on the spindle chuck together with the phase alignment of the workpiece.
Still another object of the present invention is to disclose a control device suitable for accurately and quickly performing phase alignment of a workpiece.

A machine tool system according to the present invention includes a machine tool, a loader that loads a workpiece into the machine tool, and the machine tool and a machine tool system control device that controls the loader . The machine tool includes a spindle having a spindle chuck for gripping a workpiece, and a tool table having a tool for processing the workpiece gripped by the spindle chuck. The workpiece has at least one end face provided with a convex portion and a concave portion arranged around the center of the workpiece. The spindle chuck includes a locating member that is provided perpendicular to the spindle axis and has a locating surface that contacts a tip end surface of the convex portion of the workpiece to position the workpiece in the axial direction, and the spindle axis of the locating surface An engagement member which is provided so as to be able to protrude and retract at a position deviated from, and engages with an inner surface portion facing the circumferential direction of the concave portion of the workpiece in a projecting state, and the engagement member projects. A biasing member that biases in the direction and a chuck claw that grips the workpiece by moving back and forth in the radial direction with respect to the spindle axis. In addition, the recessed part of the said workpiece | work is a location dented relatively with respect to the convex part.

According to the machine tool system having this configuration, since the locating member having the locating surface is provided on the spindle chuck, the workpiece can be positioned in the axial direction. Moreover, since the engaging member which can be protruded and retracted from the locating surface of the locating member is provided, the workpiece can be positioned in the circumferential direction. By urging the engaging member in the protruding direction by the urging member, it is possible to satisfactorily cope with the shape of the workpiece end surface in which the convex portion and the concave portion are provided around the workpiece center.
Positioning of the workpiece is performed in a series of operations when the workpiece is loaded into the spindle chuck by the loader, so that unnecessary operations such as temporary mounting of the workpiece to the spindle chuck are unnecessary, and the workpiece positioning is performed accurately and It can be done quickly. Since the workpiece positioning mechanism has a simple configuration including a locating member, an engaging member, and an urging member, it can be equipped at a low cost. Since it is not necessary to equip a positioning device outside the machine, machining with a machine tool can be performed efficiently without stopping the line.

  In the present invention, there is provided seating confirmation means for detecting whether or not the workpiece is seated on the locating surface and having a detecting portion on the locating surface, wherein the detecting member is configured such that the engagement member is a circumference of the concave portion of the workpiece. It is preferable to dispose it at a position facing the front end surface of the convex portion of the workpiece while being engaged with the inner surface portion facing in the direction.

  With this configuration, when the workpiece is positioned in the circumferential direction, the detection portion of the seating confirmation means faces the tip surface of the convex portion of the workpiece. Therefore, the seating confirmation means can be operated as it is to confirm the seating of the workpiece on the spindle chuck.

The machine tool system control device that controls the machine tool and the loader has the following configuration . That is, the machine tool system control device includes a loader when the loader carries a workpiece into the machine tool and a loading control means for controlling a series of operations of the machine tool. The loading control means includes the loader In addition, the work is carried into the spindle chuck until the tip surface of the convex portion of the work comes into contact with the locating surface of the locating member, and the work is held by the loader chuck, and the work is rotated by the rotation support member. The loader control unit for carrying in freely and the rotation support member rotatably supporting the workpiece, the main shaft is always in contact with the inner surface portion of the concave portion of the workpiece facing the circumferential direction. A main spindle rotation control section for carrying in rotation for a predetermined rotation angle, and after the rotation of the main shaft at the predetermined angle, In shall have a loading time of chucking control unit for gripping a workpiece.

  According to this machine tool system control device, the loading loader control unit of the loading control means causes the loader control unit to load the workpiece into the spindle chuck until the tip surface of the convex portion of the workpiece contacts the locating surface of the locating member. The gripping of the workpiece by the loader chuck is released, and the workpiece is rotatably supported by the rotation support member, thereby positioning the workpiece in the axial direction. In addition, the main shaft rotation control unit of the loading control means makes sure that the main shaft is in contact with the inner surface of the concave portion of the workpiece facing the circumferential direction while the rotation support member rotatably supports the workpiece. The workpiece is positioned in the circumferential direction by being rotated by a predetermined rotation angle. Then, after the spindle is rotated by a predetermined angle by the carry-in chuck control unit of the carry-in control means, the work is positioned in the axial direction and the circumferential direction by causing the spindle chuck to grip the work with the chuck claws. The spindle chuck grips the workpiece.

The machine tool system of the present invention includes a machine tool and a loader that loads the workpiece into the machine tool. The machine tool includes a spindle having a spindle chuck that holds the workpiece, and a workpiece held by the spindle chuck. A workpiece table having a tool to be machined, wherein the workpiece is provided with a convex portion and a concave portion arranged at least around one end face around the center of the workpiece, and the spindle chuck is arranged with respect to the spindle axis. A locating member that has a locating surface that is provided vertically and contacts the tip end surface of the convex portion of the workpiece to position the workpiece in the axial direction, and is provided so as to be able to protrude and retract at a position off the main axis of the locating surface; An engaging member that engages with the inner surface of the concave portion of the workpiece facing in the protruding direction and positions the workpiece in the circumferential direction; and a biasing member that biases the engaging member in the protruding direction; Since it has a chuck claw that grips the workpiece by moving back and forth in the radial direction with respect to the shaft center, the phase of the workpiece can be obtained by a simple mechanism provided in the machine tool and loader without installing a dedicated device outside the machine. combined Ru can accurately and quickly.
The machine tool system controller for controlling the machine tool and the loader includes a loader chuck for gripping the workpiece, and the workpiece is rotated about the spindle axis in a state where the loader chuck releases the workpiece. A rotation support member that rotatably supports the machine tool system control device, wherein the loader controls a series of operations of the loader and the machine tool when the loader loads a workpiece into the machine tool. The loading control means causes the loader to load the workpiece into the spindle chuck until the tip surface of the convex portion of the workpiece contacts the locating surface of the locating member. The loader control unit at the time of loading that releases the grip and supports the workpiece rotatably by the rotation support member, and the rotation Spindle rotation during loading, with the holding member rotatably supporting the workpiece, rotating the spindle by a predetermined rotation angle at which the engaging member always comes into contact with the inner surface of the concave portion of the workpiece facing the circumferential direction. The machine tool system controller accurately adjusts the phase of the workpiece because it includes a controller and a loading chuck controller that causes the spindle chuck to grip the workpiece with chuck claws after the rotation of the spindle by the predetermined angle. And it will be suitable for quick execution.

  The detecting portion is provided on the locating surface, and seating confirmation means for detecting whether or not the workpiece is seated on the locating surface is provided, and the detecting portion is an inner surface in which the engaging member faces the circumferential direction of the concave portion of the workpiece. In a state in which the workpiece is engaged, when the workpiece is disposed at a position facing the tip surface of the convex portion of the workpiece, it is possible to confirm the seating of the workpiece on the spindle chuck together with the phase alignment of the workpiece.

  An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view schematically showing the machine tool system of this embodiment. The machine tool system includes a machine tool 1, a loader 11 that loads a workpiece W into the machine tool 1, and a machine tool system control device 50 that controls the machine tool 1 and the loader 11.

  The machine tool 1 includes a lathe and includes a spindle 2 and a tool table 5. The spindle 2 has a spindle chuck 3 that grips one end of a workpiece W at its tip, and is rotatably supported by a spindle table 4 provided on a bed 7 via a bearing (not shown). The spindle chuck 3 is provided with a plurality of chuck claws 3b that open and close in conjunction with each other on the chuck body 3a, and holds the workpiece W by the chuck claws 3b. The tool table 5 is a turret and has a plurality of tools 5a for machining the workpiece W gripped by the spindle chuck 3. The tool 5a is, for example, a rotary tool such as a cutting tool or a drill. The tool table 5 is movable via a feed table 6 in a direction along the spindle axis (Z-axis direction) and in a horizontal direction (X-axis direction) perpendicular to the spindle axis O. A drive source 5b (FIG. 7) for moving the tool table 5 in the Z-axis direction and a drive source 5c (FIG. 7) for moving the tool table 5 in the X-axis direction are, for example, servomotors. A workpiece W is transferred to the spindle chuck 3 by a loader 11.

  The loader 11 is of a gantry type that is installed above the machine tool 1 and driven by an orthogonal coordinate system. As shown in the front and side views of FIGS. 1 and 2, the loader 11 is provided with a lifting rod 15 on a traveling body 13 traveling along a construction rail 12 via a front / rear moving table 14, and a loader head at the lower end thereof. 16 is provided. The loader head 16 has a loader chuck 17 that holds the workpiece W. The loader chuck 17 is provided with a plurality of chuck claws 17b that open and close in conjunction with each other on the chuck body 17a, and holds the workpiece W by the chuck claws 17b. The loader head 16 is moved in the horizontal direction perpendicular to the spindle axis O by the X-direction moving drive source 13a (FIG. 7), the Y-direction moving drive source 15a (FIG. 7), and the Z-direction moving drive source 14a (FIG. 7). (X-axis direction), up-down direction (Y-axis direction), and direction along the spindle axis O (Z-axis direction) are freely movable. Each moving drive source 13a, 14a, 15a is, for example, a servo motor.

3 is a side view of the main part of the spindle and the loader head, FIG. 4 is a front view of the spindle chuck, and FIG. 5 is a front view of the loader chuck. The front view of the spindle chuck and the front view of the loader chuck are opposite to each other.
3 and 4, the main shaft 2 rotatably supported by the main shaft base 4 is a hollow shaft, and a pulley 21 is provided at the rear portion of the main shaft 2. The rotation of the main shaft rotation drive source 22a (FIG. 7) is transmitted to the main shaft 2 through the main shaft belt 22 hung on the pulley 21. The spindle rotation drive source 22a is, for example, a servo motor. As the main shaft 2 rotates, the main shaft chuck 3 provided at the tip of the main shaft 2 rotates.

  The plurality of chuck claws 3b of the spindle chuck 3 are arranged on the front surface of the spindle chuck 3 so as to be able to advance and retract in the radial direction in conjunction with the chuck center. Specifically, the chuck claw mount 3c is installed so as to be able to advance and retreat in the radial direction with respect to the chuck body 3a of the spindle chuck 3, and the chuck claw 3b can be attached to and detached from the chuck claw mount 3c with a bolt or the like. Installed. In the main shaft 2, a chuck claw operating shaft 9 is provided concentrically with the axis of the main shaft 2 so as to advance and retreat in a direction along the coaxial center (Z-axis direction). The tip of the chuck claw operating shaft 9 is connected to each chuck claw mounting base 3c via an operation converting mechanism 3d such as a link mechanism provided in the chuck body 3a. This is transmitted as an opening / closing operation to each chuck claw mount 3c via the operation conversion mechanism 3d. The chuck claw operating shaft 9 is driven forward / backward by a spindle chuck opening / closing device 10. The spindle chuck opening / closing device 10 is composed of, for example, a hydraulic cylinder.

  The chuck claw operating shaft 9 is a hollow shaft, and an air pipe 23 is provided therein, and a coolant pipe 24 is provided inside the air pipe 23. The front end portions of the air pipe 23 and the coolant pipe 24 are inserted into a plug member 25 that closes the front center opening of the spindle chuck 3. The plug member 25 is fixed to the chuck body 3a. The plug member 25 is provided with a first air passage 26 that communicates the air pipe 23 and the front surface of the plug member 25, and a first coolant passage 27 that communicates the coolant pipe 24 and the front surface of the plug member 25. Yes. The front end opening of the first coolant passage 27 is located at the main shaft axis O on the front surface of the plug member 25, and the front end opening of the first air passage 26 is located away from the main shaft axis O on the front surface of the plug member 25. .

  The spindle chuck 3 is provided with a locating member 30 fixed to the stopper member 25. The locating member 30 is for positioning the workpiece W in the axial direction, and has a locating surface 31 for positioning perpendicular to the spindle axis O. The locating surface 31 of this embodiment is formed in an annular shape corresponding to the shape of the workpiece W described later. Since the chuck claw 3b is configured to move back and forth in the radial direction with respect to the spindle axis O and grip the workpiece W, the locating member 30 can be disposed without causing interference with the chuck claw 3b.

  The locating member 30 is provided with an engaging member 32 for positioning the workpiece W in the circumferential direction. The engaging member 32 is a pin-shaped member, and is accommodated in an accommodating hole 33 provided in the locating member 30 that faces in the direction of the spindle axis O. One end of the engaging member 32 can protrude and retract from a predetermined position on the locating surface 31. ing. The engaging member 32 is urged toward the side protruding from the locating surface 31 by the urging member 34 provided in the accommodation hole 33. As the urging member 34, for example, a compression coil spring can be used. A large-diameter portion 32a is provided at the rear end of the engaging member 32, and the large-diameter portion 32a hits the step portion 33a of the accommodation hole 33 so that the engaging member 32 does not protrude from the locating surface 31 for a certain amount. It has become.

  The locating member 30 is provided with a second air passage 35 that communicates the first air passage 26 with a location on the locating surface 31 away from the engaging member 32. An opening at the locating surface 31 of the second air passage 35 is an air discharge port 36, and this air discharge port 36 is a detection part of the seating confirmation means 37. The seating confirmation means 37 is a means for confirming whether the workpiece W is properly seated on the spindle chuck 3, and the air supply device 38 (FIG. 7) and the air through which the air supplied from the air supply device 38 passes. A pressure gauge such as an air supply path including a pipe 23, a first air passage 26, a second air passage 35, an air discharge port 36 serving as a detection unit, and a pressure switch for measuring a back pressure in the air supply path. (Not shown).

  Further, the locating member 30 is provided with a second coolant passage 39 that communicates the first coolant passage 27 and the front surface of the locating member 31 on the inner peripheral side with respect to the locating surface 31. At the time of processing, the coolant is supplied to the coolant pipe 24 by a coolant supply device (not shown), and the coolant passes through the first and second coolant passages 27 and 39 and is on the spindle side of the workpiece W held by the spindle chuck 3. The ink is discharged into the end face or the through hole Wf (see FIG. 6).

  3 and 5, the plurality of chuck claws 17 b of the loader chuck 17 are disposed in front of the chuck body 17 a so as to face the chuck claws 3 b of the spindle chuck 3. Each chuck claw 17b can advance and retreat in the radial direction in conjunction with the chuck center, and the operation of the loader chuck opening / closing device 18 (FIG. 7) provided on the loader head 16 is linked to the link mechanism (see FIG. 7). (Not shown) is transmitted to each chuck claw 17b as an opening / closing operation. The loader chuck opening / closing device 18 is composed of, for example, a hydraulic cylinder.

  The loader chuck 17 is provided with a pusher plate 41 located on the inner periphery of the chuck claw 17b. The pusher plate 41 is used to press the workpiece W against the locating surface 31 of the locating member 30 when the workpiece is loaded, and is supported by the support plate 42. The support plate 42 has a shape in which branch portions 42a extend radially from the main axis O in three directions, and an advancing / retracting / biasing mechanism 43 is provided between each branch portion 42a and the chuck body 17a. . The advancing / retreating / biasing mechanism 43 is provided with a guide shaft 44 fixed to the support plate 42 and facing the direction of the spindle axis O, and the tip of the guide shaft 44 is inserted into the guide hole 45 of the chuck body 17a. A compression coil spring 46 is interposed between the outer periphery of the guide shaft 44 and between the support plate 42 and the chuck body 17a. As a result, the support plate 42 and the pusher plate 41 are movable forward and backward in the direction of the spindle axis O with respect to the chuck body 17a and are urged toward the spindle chuck 3 side.

  In addition, a rotation support member 47 that is inserted into a through-hole Wf (see FIG. 6) of the workpiece W and rotatably supports the workpiece W around the spindle axis O is disposed at the central portion of the pusher plate 41. And is provided integrally. The urging force that urges the pusher plate 41 toward the spindle chuck 3 by the advance / retreat / biasing mechanism 43 is when a rotational force is applied to the workpiece W while the workpiece W is pressed against the locating surface 31 by the pusher plate 41. Furthermore, the frictional force between the pusher plate 41 and the workpiece W is set so as not to prevent the workpiece W from rotating around the rotation support member 47.

  An example of a workpiece machined by this machine tool system is shown in FIG. In this work W, a plurality of (six in this example) convex portions Wb, Wc and concave portions Wd, We are arranged at equal intervals around the center of the workpiece on both end faces of a ring-shaped main body Wa having a central axis WO. Is provided. The convex portions Wb and Wc are cylindrical, and their tip surfaces Wba and Wca are perpendicular to the central axis WO. The concave portions Wd and We of the workpiece W are portions that are recessed relatively to the convex portions Wb and Wc. A through hole Wf penetrating in the direction of the central axis WO is provided at the center of the workpiece W.

  A control device for controlling the machine tool system will be described with reference to FIG. The machine tool system control device 50 includes a machine tool control device 51 that controls the machine tool 1 and a loader control device 52 that controls the loader 11. Each of the control devices 51 and 52 includes a computer type numerical control device and a programmable controller. The machine tool control device 51 includes a machining program 53 and an arithmetic control unit 54 that executes the machining program 53. The loader control device 52 includes a loader control program 55 and an arithmetic control unit 56 that executes the loader control program 55. Each arithmetic control unit 54, 56 shows a central processing unit, a memory, and the like including a programmable controller. The machine tool control device 51 and the loader control device 52 exchange information with each other.

  The calculation control unit 54 of the machine tool control device 51 issues an output command to each drive unit of the machine tool 1, and the calculation control unit 56 of the loader control device 52 issues an output command to each drive unit of the loader 11. The drive unit of the machine tool 1 includes a tool table Z-direction movement drive source 5b, a tool table X-direction movement drive source 5c, a spindle rotation drive source 22a, an air supply device 38, and a spindle chuck opening / closing device 10. The drive unit of the loader 11 is an X-axis direction movement drive source 14a, a Y-axis direction movement drive source 15a, a Z-axis direction movement drive source 13a, and a loader chuck opening / closing device 18.

  As shown in FIG. 8, the machine tool control device 51 includes a general operation control unit 61, a carry-in spindle rotation control unit 62, a seating confirmation control unit 63, and a carry-in chuck by a machining program 53 and a calculation control unit 54. A control unit 64 is configured. In addition, the loader control device 52 includes a loader control program 55 and a calculation control unit 56, and a loader control unit 65 at the time of conveyance / unloading and a loader control unit 66 at the time of loading. A combination of the carry-in spindle rotation control unit 62, the seating confirmation control unit 63, the carry-in chuck control unit 64, and the carry-in loader control unit 66 is the carry-in control means 67. The carrying-in control means 67 performs a series of controls of the loader 11 and the machine tool 1 when the loader 11 carries the workpiece W into the machine tool 1.

The control unit constituting the carry-in control means 67 will be described.
The transport loader control unit 66 outputs to the Z-axis direction moving drive source 13a, and moves the loader chuck 17 located on the extension line of the spindle axis O toward the spindle chuck 3 side to locate the locating surface of the locating member 30. The workpiece W is carried into the spindle chuck 3 until the tip end surface Wba of the convex portion Wb of the workpiece W comes into contact with 31 and output to the loader chuck opening / closing device 18 to release the gripping of the workpiece W by the loader chuck 17 and rotate. Control is performed so that the workpiece W is rotatably supported by the support member 46.

  The carry-in spindle rotation control unit 62 outputs the spindle 2 to the spindle rotation drive source 22a in a state where the rotation support member 47 rotatably supports the workpiece W after being controlled by the transfer loader control unit 66. The engagement member 32 is rotated by a predetermined rotation angle that always comes into contact with the inner surface portion of the concave portion Wd of the workpiece W facing the circumferential direction. When the number of convex portions (concave portions Wd) of the workpiece W is n, the predetermined rotation angle is represented by 360 ° / n + α. α is, for example, 5 ° to 10 °. In the case of this embodiment, since the number of convex portions Wb (concave portions Wd) is 6, the rotation angle of the main shaft 2 is set to 60 ° or more, for example, 65 ° to 70 °.

  The seating confirmation control unit 63 outputs to the air supply device 38 after the control by the carry-in main shaft rotation control unit 62, and measures the back pressure of the air supply path at that time with a pressure gauge, so that the locating member 30 Control is performed so as to determine whether or not the workpiece W is properly seated on the locating surface 31. That is, if the workpiece W is properly seated, air is not discharged from the air discharge port 36, so the back pressure increases. Conversely, if the workpiece W is not properly seated, air is discharged from the air discharge port 36. Therefore, the back pressure is lowered. From this, it is possible to determine whether or not the workpiece W is properly seated by measuring the back pressure.

  When the workpiece W is properly seated by the control by the seating confirmation control unit 63, the carry-in chuck control unit 64 outputs to the spindle chuck opening / closing device 10 to the spindle chuck 3 with the chuck claw 3b. Control to hold.

  The general operation control unit 61 of the machine tool control device 51 performs general control related to the machine tool 1 other than control by the carry-in spindle rotation control unit 62, the seating confirmation control unit 63, and the carry-in chuck control unit 64. Specifically, the spindle 2 for machining the workpiece W by appropriately outputting to the tool table Z direction movement drive source 5b, the tool table X direction movement drive source 5c, the spindle rotation drive source 22a, and the spindle chuck opening / closing device 10. Are controlled such as rotation and stop of the tool, movement of the tool base 5 in the Z-axis direction and X-axis direction, and release of the workpiece by the spindle chuck 3 after completion of machining.

  The loader control unit 65 of the loader control device 52 outputs to the X-axis direction movement drive source 14a, the Y-axis direction movement drive source 15a, the Z-axis direction movement drive source 13a, and the loader chuck opening / closing device 18, Control for conveying the workpiece W from a predetermined material workpiece storage area to an extension line of the spindle axis O and control for unloading the processed workpiece W and conveying it to a predetermined product workpiece storage area are performed.

The operation of the machine tool system under the control of the machine tool system control device 50 will be described with reference to FIG.
First, the loader 11 operates so that the loader chuck 17 grips the material workpiece W in the material workpiece storage area and conveys it to the extension line of the spindle axis O by the control of the loader control unit 65 during conveyance / unloading (the same figure). (A)).

Next, the loader chuck 17 is moved to the spindle chuck 3 side by the control of the loader control unit 66 at the time of conveyance, and the tip surface Wba of the projection Wb on the spindle chuck 3 side of the workpiece W is located on the locating surface of the spindle chuck locating member 30. It is made to contact 31 (the figure (B)). At this time, when the engaging member 32 of the locating member 30 is in a position facing the convex portion Wb of the workpiece W as shown in FIG. 5B, the engaging member 32 is pushed by the convex portion Wb and located on the locating surface 31. Immerse yourself from. Further, when the engaging member 32 is at a position facing the concave portion Wd of the workpiece W (not shown), the engaging member 32 remains protruding from the locating surface 31.
When the front end surface Wba of the convex portion Wb comes into contact with the locating surface 31, the chuck claw 17b of the loader chuck 17 is opened to release the workpiece W ((C) in the figure). The loader chuck 17 is in a state in which the pusher plate 41 is pushed into the chuck body 17a side by the workpiece W when the workpiece W is gripped in the material workpiece storage area. Therefore, when the chuck claw 17 b is opened, the work W is pressed against the locating surface 31 by being pushed by the pusher plate 41 that receives the elastic repulsion force of the compression coil spring 46. Thereby, the workpiece | work W is positioned to an axial direction.

  Next, the main shaft 2 rotates by the predetermined rotation angle under the control of the main shaft rotation control unit 62 at the time of loading. Even if the engaging member 32 faces either the convex portion Wb or the concave portion Wd of the workpiece W before the main shaft is rotated, the engaging member 32 is always in contact with the inner surface portion of the concave portion Wd of the workpiece W facing in the circumferential direction ( (D) of FIG. As a result, the workpiece W is positioned in the circumferential direction. After the engaging member 32 comes into contact with the inner surface of the concave portion Wd of the workpiece W, the workpiece W idles around the rotation support member 47 by the rotation of the main shaft 2. Since the engaging member 32 is urged in the protruding direction by the urging member 34, the workpiece W has a shape of a workpiece end surface in which the convex portion Wb and the concave portion Wd are provided around the workpiece center like the workpiece W in this example. Can cope well.

  When the workpiece W is positioned in the circumferential direction, the seating confirmation control unit 63 confirms the seating of the workpiece W by the above method. By positioning in the circumferential direction, the air discharge port 36, which is a detection part of the seating confirmation means 37, is always in a position facing the convex part Wb of the workpiece W, so that seating confirmation can be performed accurately.

  If the seating confirmation confirms that the workpiece W is properly seated on the spindle chuck 3, the chuck claw 3b is closed and the spindle chuck 3 grips the workpiece W under the control of the chuck controller 64 at the time of loading. (Figure (E)).

  Thereafter, the workpiece W is processed under the control of the general operation control unit 61. When the machining is completed, the spindle chuck 3 releases the product workpiece W after the machining ((F) in the figure). Subsequently, the loader chuck 17 grips the product workpiece W released from the spindle chuck 3 under the control of the loader control unit 65 at the time of conveyance / unloading, and the product workpiece W is unloaded from the spindle chuck 3 and conveyed to the product workpiece storage area. To do.

  In the machine tool system of the present invention, the axial and circumferential positioning of the workpiece W is performed by a series of operations when the workpiece W is loaded into the spindle chuck 3 by the loader 11 under the control of the loading control means 67. Therefore, an extra operation such as temporary mounting of the workpiece W to the spindle chuck 3 is unnecessary, and the workpiece W can be positioned accurately and quickly. Since the workpiece positioning mechanism has a simple configuration including the locating member 30, the engaging member 32, and the urging member 34, it can be equipped at a low cost. There is no need to equip a positioning device outside the machine. Since the workpiece positioning mechanism does not need to be changed in accordance with the workpiece W, the machining can be efficiently performed without stopping the line for a long time.

  In this embodiment, the case where the workpiece W has the shape shown in FIG. 6 has been described. However, the machine tool system of the present invention is not limited to the shape shown in FIG. 6, and at least one end face has a convex portion and a concave portion. It can be applied to workpieces arranged side by side around the workpiece center.

1 is a front view schematically showing a machine tool system according to an embodiment of the present invention. It is a side view which mainly shows the loader of the machine tool system. It is a partially broken side view of the principal part of the machine tool system. It is a front view of the spindle chuck of the machine tool system. It is a front view of the loader chuck of the machine tool system. It is a perspective view of an example of a work. It is a block diagram which shows the conceptual structure of the machine tool system control apparatus of the machine tool system. It is a block diagram which shows the functional structure of the machine tool system control apparatus. It is explanatory drawing which shows operation | movement at the time of the workpiece | work carrying-in of the machine tool system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Machine tool 2 ... Main shaft 3 ... Main shaft chuck 3b ... Chuck claw 5 ... Tool stand 5a ... Tool 11 ... Loader 17 ... Loader chuck 30 ... Locate member 31 ... Locate surface 32 ... Engagement member 34 ... Energizing member 36 ... Air Discharge port (detector)
37 ... Seating confirmation means 41 ... Pusher plate 47 ... Rotation support member 50 ... Machine tool system controller 62 ... Carry-in spindle rotation controller 63 ... Seating confirmation controller 64 ... Carry-in chuck controller 66 ... Carry-in loader controller 67 ... Control means O at the time of loading ... Spindle axis W ... Work Wb ... Projection Wba ... Tip surface Wd ... Concave

Claims (2)

A machine tool system comprising a machine tool, a loader for carrying a workpiece into the machine tool, and the machine tool and a machine tool system control device for controlling the loader ,
The machine tool includes a spindle having a spindle chuck for gripping a workpiece, and a tool table having a tool for processing the workpiece gripped by the spindle chuck,
The workpiece is provided with a convex portion and a concave portion arranged around the workpiece center on at least one end face,
The spindle chuck includes a locating member that is provided perpendicular to the spindle axis and has a locating surface that contacts a tip end surface of the convex portion of the workpiece to position the workpiece in the axial direction, and the spindle axis of the locating surface An engagement member which is provided so as to be able to protrude and retract at a position deviated from, and engages with an inner surface portion facing the circumferential direction of the concave portion of the workpiece in a projecting state, and the engagement member projects. e Bei a biasing member for biasing in a direction, a chuck claws for gripping a workpiece to advance and retreat in a radial direction relative to the spindle axis,
The loader includes a loader chuck that grips a workpiece, and a rotation support member that rotatably supports the workpiece around the spindle axis in a state where the loader chuck releases the workpiece.
The machine tool system control device includes a loader when the loader carries a workpiece into the machine tool and a loading control means for controlling a series of operations of the machine tool,
This carrying-in control means is
The loader is loaded into the spindle chuck until the tip surface of the convex portion of the workpiece comes into contact with the locating surface of the locating member, and the gripping of the workpiece by the loader chuck is released, and the work is supported by the rotation support member. A loader control unit at the time of loading that rotatably supports
When the rotation support member rotatably supports the workpiece, the main shaft is rotated by a predetermined rotation angle at which the engagement member always comes into contact with the inner surface portion of the concave portion of the workpiece facing the circumferential direction. A spindle rotation control unit;
A chuck control unit at the time of loading that causes the spindle chuck to grip a workpiece with chuck claws after the rotation of the spindle by the predetermined angle;
A machine tool system.   The detecting portion is provided on the locating surface, and seating confirmation means for detecting whether or not the workpiece is seated on the locating surface is provided, and the detecting portion is an inner surface in which the engaging member faces the circumferential direction of the concave portion of the workpiece. The machine tool system according to claim 1, wherein the machine tool system is disposed at a position facing a front end surface of the convex portion of the workpiece while being engaged with the portion.

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