Machine tool and drive control method

Abstract

A jig device (100) for a workpiece (W) in a machine tool is provided with: a holding mechanism (110) for holding the workpiece in a cantilevered state; and a main shaft direction support mechanism (120) that has at least one main shaft direction support member (121) disposed so as to face the workpiece held by the holding mechanism in a cantilevered state from the opposite side of the main shaft (200) in the main shaft direction of the machine tool, and also has a main shaft direction drive member (125) that drives the main shaft (200) in the main shaft direction of the machine tool. And a main shaft direction drive member (125) for driving the main shaft direction support member in the main shaft direction between a main shaft direction support position where the main shaft direction support member is in contact with the workpiece and a main shaft direction retracted position where the main shaft direction support member is separated from the workpiece. The contact position of the main axis direction support member and the workpiece can be changed in an orthogonal plane orthogonal to the main axis direction.

Description

[0001] This application is a divisional application of a patent application for a jig device and a jig unit, with an application date of February 13, 2023, an application number of 202380063613.7, and an invention title of "Jig Device and Jig Unit". Technical Field

[0002] The present invention relates to a jig device for a workpiece held in a cantilever state and a jig unit for the jig device. Background Art

[0003] A lower jig device for a six-sided machining center is described in Patent Document 1. The lower jig device includes a fixed lower jig that supports a workpiece using a workpiece support surface and a liftable lower jig. Moreover, when the liftable lower jig rises, the workpiece support surface of the liftable lower jig and the workpiece support surface of the fixed lower jig become coplanar. Moreover, when the liftable lower jig descends, the workpiece support surface of the liftable lower jig becomes lower than the workpiece support surface of the fixed lower jig.

[0004] Prior Art Documents

[0005] Patent Documents

[0006] Patent Document 1: Japanese Patent Application Laid-Open No. 2014-18944 Summary of the Invention

[0007] Problems to be Solved by the Invention

[0008] When machining a workpiece using a machine tool for machining a workpiece as a workpiece, such as a machine tool called a machining center, the workpiece is held by a jig device. Moreover, when machining a large number of mass-produced workpieces, a general jig device is used. On the other hand, when machining a small number of workpieces of multiple varieties each time, a dedicated jig device is used for each workpiece. In such a case of using a dedicated jig device, when changing the machining surface, a process of stopping the machine tool and removing the workpiece from the jig device is generated. In addition to this removal process, a process of mounting the removed workpiece on another jig device is also generated. As a result, the machining time becomes long due to the number of workpiece loading and unloading processes and the machine tool stop time. As a result, the machining efficiency of the workpiece is reduced.

[0009] Solutions to the Problems

[0010] The jig device of one mode is a jig device for a workpiece in a machine tool. Among them, the jig device includes: a holding mechanism that holds the workpiece in a cantilever state; and a main spindle direction support mechanism that has at least one main spindle direction support member and a main spindle direction driving component. The main spindle direction support member is disposed opposite to the workpiece held in a cantilever state by the holding mechanism from the opposite side of the main spindle in the main spindle direction of the machine tool, and the main spindle direction driving component drives the main spindle direction support member between a main spindle direction support position in contact with the workpiece and a main spindle direction retracted position away from the workpiece in the main spindle direction. The main spindle direction support mechanism is configured to be able to change the contact position where the main spindle direction support member contacts the workpiece in an orthogonal plane orthogonal to the main spindle direction.

[0011] In addition, the jig unit of another mode is a jig unit for a jig device of a workpiece held in a cantilever state in a machine tool. Among them, the jig unit includes a main spindle direction support mechanism that has at least one main spindle direction support member and a main spindle direction driving component. The main spindle direction support member is disposed opposite to the workpiece held in a cantilever state from the opposite side of the main spindle in the main spindle direction of the machine tool, and the main spindle direction driving component drives the main spindle direction support member between a main spindle direction support position in contact with the workpiece and a main spindle direction retracted position away from the workpiece in the main spindle direction. The main spindle direction support mechanism is configured to be able to change the contact position where the main spindle direction support member contacts the workpiece in an orthogonal plane orthogonal to the main spindle direction.

[0012] Effects of the Invention

[0013] Accordingly, it is possible to provide a jig device that can cope with various machining conditions applied to the workpiece and improve the machining efficiency of the workpiece. Description of the Drawings

[0014] Figure 1 It is a schematic perspective view of the jig device.

[0015] Figure 2 It is a schematic side view of the main support member in the support position.

[0016] Figure 3 It is a schematic perspective view of the sub-support mechanism in the standby position.

[0017] Figure 4 It is a schematic perspective view of the jig device.

[0018] Figure 5 It is a schematic perspective view of the jig device of the modified mode.

[0019] Figure 6Figure A is a schematic explanatory diagram showing the situation before pulling in. Figure 6 Figure B is a schematic explanatory diagram showing the situation after pulling in. Detailed implementation mode

[0020] Hereinafter, an exemplary implementation mode for implementing the present invention will be described in detail with reference to the accompanying drawings. However, the dimensions, materials, shapes, and relative positions of the constituent elements described in the following implementation modes can be arbitrarily set and can be changed according to the configuration of the device or method to which the present invention is applied or various conditions. In addition, unless otherwise specified, the scope of the present invention is not limited to the following specifically described implementation modes. Furthermore, in this specification, the side of the machine tool where the spindle is arranged corresponds to "up", and the opposite side corresponds to "down".

[0021] Example

[0022] Refer to Figure 1 , a jig device 100 for a workpiece W held in a cantilever state above a workbench 210 of a machine tool (not shown), that is, on the workbench 210, will be described. In addition, Figure 1 is a schematic perspective view of the jig device 100 observed from obliquely above. As an example, the jig device 100 of the present implementation mode is provided inside the machine tool and holds and supports the workpiece W to be machined in a cantilever state.

[0023] For example, the machine tool performs operations such as hole opening machining, milling machining, or chamfering machining on the workpiece W. As a specific example, the processing machine is a three-axis processing machine that processes three surfaces of the workpiece W when the workpiece W is a cuboid, or a five-axis processing machine that processes five surfaces of the workpiece W. Moreover, the processing machine is a vertical processing machine, a horizontal processing machine, or a gantry processing machine. However, in the following description, an example where the machine tool is a vertical three-axis processing machine will be mainly described.

[0024] The jig device 100 is provided between the workbench 210 of the machine tool and Figure 1 the spindle 200 of the machine tool indicated by a dashed line. In addition, the workbench 210 can also move in a state where the jig device 100 is provided. For example, the workbench 210 can move up and down in a direction parallel to the spindle direction of the machine tool (hereinafter also referred to as the Z direction), and can also rotate around a rotation axis parallel to the Z direction. Moreover, the workbench 210 can move parallel in a direction orthogonal to the spindle direction (hereinafter, also referred to as the X direction or the Y direction), and can also rotate around a rotation axis parallel to the X direction or the Y direction.

[0025] The jig device 100 includes a holding mechanism 110 that holds the workpiece W in a cantilever state, and a jig unit U. Moreover, the jig unit U includes a main support mechanism 120 as an example of a main axis direction support mechanism having a main axis direction support member and a main axis direction support mechanism described later. Moreover, the jig unit U includes a sub-support mechanism 130 as an example of a second axis direction support mechanism having a second axis direction support member described later.

[0026] The holding mechanism 110 holds the end portion (hereinafter, also referred to as the holding end portion) of the workpiece W in the first axis direction orthogonal to the main axis direction in a cantilever state. That is, when the holding mechanism 110 holds the holding end portion of the workpiece W in the X direction, which is defined as the first axis direction orthogonal to the main axis direction, the other end portion of the workpiece W in the X direction becomes a free end portion. On the other hand, when the holding mechanism 110 holds the holding end portion of the workpiece W in the Y direction, which is defined as the first axis direction orthogonal to the main axis direction, the other end portion of the workpiece W in the Y direction becomes a free end portion.

[0027] In addition, when the holding mechanism 110 holds the holding end portion of the workpiece W in the X direction, the second axis direction support member of the sub-support mechanism 130 faces the workpiece W in the Y direction, which is defined as the second axis direction orthogonal to the main axis direction and the X direction. On the other hand, when the holding mechanism 110 holds the holding end portion of the workpiece W in the Y direction, the second axis direction support member faces the workpiece W in the X direction, which is defined as the second axis direction orthogonal to the main axis direction and the Y direction. However, in the following description, mainly an example in which the holding mechanism 110 holds the holding end portion of the workpiece W in the X direction as the first axis direction will be described.

[0028] [Holding mechanism 110]

[0029] A chuck 111, which is a holding member for clamping the workpiece W, is mounted on the holding mechanism 110. As an example, the chuck 111 can be detached from and attached to the holding mechanism 110. For example, the chuck 111 has a pair of movable claw portions. Moreover, the holding mechanism 110 holds the workpiece W by clamping the holding end portion of the workpiece W with the pair of claw portions. Alternatively, the chuck 111 may have three or more claw portions. Moreover, the holding member may be a suction device that sucks and holds the holding end portion of the workpiece W.

[0030] In the case of so-called external changeover in which the processed workpiece W and the unprocessed workpiece W are exchanged without stopping the machine tool, the chuck 111 automatically clamps the workpiece W. For example, the processed workpiece W is sent out of the machine tool by a robot arm. After that, the unprocessed workpiece W is sent into the machine tool by the robot arm. Then, the chuck 111 automatically clamps the sent-in unprocessed workpiece W.

[0031] In addition, the holding mechanism 110 has a rotating mechanism 112 that rotates the workpiece W around a rotation axis orthogonal to the spindle direction. The rotating mechanism 112 is, for example, called an indexing table or a rotary table. Specifically, as a rotation axis orthogonal to the spindle direction, the rotating mechanism 112 rotates the chuck 111 around a rotation axis X1 parallel to the X direction within a range of 360 degrees. Thus, the rotating mechanism 112 can rotate the workpiece W held by the chuck 111 around the rotation axis X1.

[0032] By rotating the workpiece W by the rotating mechanism 112, the machine tool can machine four sides of the workpiece W. For example, when the workpiece W is a rectangular parallelepiped, the machine tool can machine a total of four sides, namely, two sides arranged in the Z direction as the spindle direction and two sides arranged in the Y direction orthogonal to the Z direction. In addition, the holding mechanism 110 incorporates a rotation drive component (not shown) that drives the rotating mechanism 112. As an example, the rotation drive component includes a drive device that outputs a rotational motion and a rotation transmission mechanism connected to the output shaft of the drive device.

[0033] In addition, the holding mechanism 110 may have a first rotating mechanism and a second rotating mechanism. The first rotating mechanism rotates the workpiece W around a first rotation axis orthogonal to the spindle direction. Moreover, the second rotating mechanism rotates the workpiece W around a second rotation axis orthogonal to the spindle direction and the first rotation axis. For example, the rotating mechanism 112 as the first rotating mechanism rotates the workpiece W around a rotation axis X1 parallel to the X direction, which is the first rotation axis orthogonal to the spindle direction, i.e., the Z direction. Moreover, a second rotating mechanism (not shown) rotates the workpiece W around a rotation axis Y2 parallel to the Y direction, which is the second rotation axis orthogonal to the Z direction and the rotation axis X1.

[0034] Specifically, the second rotating mechanism rotates the holding mechanism 110 by 90 degrees around the rotation axis Y2. Thus, the free end of the workpiece W held by the chuck 111 faces the spindle 200. That is, the free end of the workpiece W faces the Figure 1 upper side in. Therefore, the machine tool can machine a total of five sides, namely, two sides arranged in the Z direction, two sides arranged in the Y direction, and one side on the free end side. The one side on the free end side faced the side opposite to the holding mechanism 110 before rotating around the rotation axis Y2. In addition, the holding mechanism 110 incorporates a rotation drive component (not shown) that drives the second rotating mechanism.

[0035] As an example, the second rotation mechanism rotates the holding mechanism 110 about the rotation axis Y2 separately from the main support mechanism 120. That is, the second rotation mechanism rotates the holding mechanism 110 without rotating the main support mechanism 120. In this case, the workpiece W is not supported by the main support mechanism 120, and the load during machining in the rotated spindle direction is applied to the holding mechanism 110 that holds the workpiece W in a cantilever state. Therefore, the workpiece W is in a state of being supported by the holding mechanism 110, and deformation of the workpiece W due to the machining load can be suppressed.

[0036] [Spindle direction support mechanism]

[0037] As Figure 2 shown, the main support mechanism 120 has at least one main support member 121 as an example of a spindle direction support member. The main support member 121 is arranged relative to the workpiece W held by the holding mechanism 110 so as to face the workpiece W from the opposite side of the spindle 200 in the spindle direction of the machine tool. That is, the main support member 121 is located below the chuck 111 of the holding mechanism 110 and on the side closer to the spindle 200 relative to the holding mechanism 110.

[0038] In Figure 1 the example, the main support mechanism 120 has twenty-five main support members 121 arranged in a matrix of five columns in the X direction and five columns in the Y direction. Alternatively, the main support member 121 may be one, or may be twenty-four or less or twenty-six or more. In addition, the main support members 121 may be arranged in other forms such as a staggered grid pattern, or may be arranged irregularly.

[0039] In addition, the main support mechanism 120 has a main drive unit 125 ( Figure 1 ) as an example of a spindle direction drive component that drives the main support member 121. In the spindle direction, the main drive unit 125 drives the main support member 121 between the spindle direction support position where the main support member 121 contacts the workpiece W and the spindle direction retracted position where the main support member 121 moves away from the workpiece W. Specifically, in the Z direction as the spindle direction, the main drive unit 125 causes the main support member 121A located at Figure 2 the spindle direction retracted position shown to protrude upward toward the spindle direction support position. Moreover, in the Z direction, the main drive unit 125 causes the main support member 121B that has protruded to Figure 2 the spindle direction support position shown to retract downward toward the spindle direction retracted position.

[0040] Refer to Figure 2 for an explanation of the drive of the main support member 121. In addition, Figure 2is a schematic side view of the main support member 121, with a part of the main support member 121 located at the main shaft direction support position. In Figure 2 five main support members 121 are shown. In addition, the top end of the main support member 121 is flat, and its top end surface contacts the workpiece W. Alternatively, the top end of the main support member 121 may have other shapes such as spherical or hemispherical.

[0041] Each main support member 121 is a substantially cylindrical member that displaces from the main shaft direction retracted position toward the main shaft direction support position. Moreover, the main support member 121 rises toward the workpiece W under the action of the power supplied by the self-driving unit 125. For example, the main support member 121 is driven by electric power, air pressure, hydraulic pressure, or the spring force of a compression spring. As an example, the main support member 121 is a pin or rod of a linear actuator such as a solenoid actuator, a feed screw, a cylinder, or a hydraulic cylinder.

[0042] As Figure 2 shown, the rising of the main support member 121 stops when it contacts the workpiece W. After that, the rising and falling of the main support member 121 are restricted. Thus, the workpiece W held in a cantilever state by the chuck 111 is supported by the main support member 121. After that, when the machining is finished, the main support member 121 descends. Then, the descending main support member 121 stops at the main shaft direction retracted position.

[0043] The main support mechanism 120 is configured to be able to change the contact position where the main support member 121 contacts the workpiece W in the orthogonal plane orthogonal to the main shaft direction. That is, the main driving unit 125 of the main support mechanism 120 is configured to selectively drive the main support member 121 protruding to the contact position where it contacts the workpiece W in the XY plane, which is the orthogonal plane orthogonal to the Z direction as the main shaft direction.

[0044] Specifically, the main support mechanism 120 has a plurality of main support members 121 arranged at different positions in the orthogonal plane orthogonal to the main shaft direction. Moreover, the plurality of main support members 121 are divided in such a way that each driving unit driven by the main driving unit 125 includes at least one main support member 121. As an example, twenty-five driving units are set in the main support mechanism 120, each including one main support member 121. However, the driving unit can be set to include any number of main support members 121. For example, the driving unit can be set to include five main support members 121 arranged in a row.

[0045] Moreover, the main drive unit 125 drives each main support member 121 for each drive unit. For example, in the case where twenty-five drive units are set, the main drive unit 125 selectively drives each main support member 121. Additionally, in the case where five drive units are set in such a manner that each includes five main support members 121 arranged in a row, the main drive unit 125 selectively drives every five main support members 121.

[0046] For example, the main drive unit 125 is controlled by a control device (e.g., a processor), which is an example of a computer, provided in the machine tool. Moreover, the main drive unit 125 causes the main support member 121 at a position corresponding to the shape of the workpiece W recognized by the control device to protrude. In Figure 2 the example, the main drive unit 125 causes three main support members 121 located at positions corresponding to the shape of the workpiece W to protrude.

[0047] As an example, the control device acquires pin determination information (e.g., pin number) for determining the protruding main support member 121. This pin determination information can be acquired from a memory, which is an example of a storage device, provided in the machine tool or an external storage device provided outside the machine tool. Alternatively, the control device may also acquire pin determination information manually input by an operator. Then, the control device uses the pin determination information corresponding to the workpiece W to be machined to determine and select the protruding main support member 121.

[0048] Then, the control device causes the selected main support member 121 to protrude at a predetermined protruding moment by using the main drive unit 125. In addition, the protruding moment is, for example, the moment when the chuck 111 completes holding the workpiece W, or the moment when the rotation of the chuck 111 holding the workpiece W based on the rotation mechanism 112 is completed. Moreover, the control device causes the selected main support member 121 to retract at a predetermined retracting moment by using the main drive unit 125. In addition, the retracting moment is, for example, the moment when machining of one surface of the workpiece W is completed.

[0049] Alternatively, the control device may also use a detection device such as a sensor or a photographing device to identify the shape of the workpiece W. In this case, the control device determines the main support member 121 located at a position corresponding to the identified shape of the workpiece W. Then, the control device causes the determined main support member 121 to protrude at a predetermined protruding moment by using the main drive unit 125. Additionally, the control device causes the determined main support member 121 to retract at a predetermined retracting moment by using the main drive unit 125.

[0050] In this way, the main support mechanism 120 selects the prominent main support member 121. Thus, in the XY plane, the main support member 121 located at the position in contact with the workpiece W projects selectively. Therefore, the main support mechanism 120 can change the contact position where the main support member 121 contacts the workpiece W in the XY plane according to the shape of the workpiece W. As a result, the same jig device 100 can support workpieces W machined into various shapes.

[0051] In addition, when machining is performed near the free end away from the holding end, a downward load centered on the fixed position is applied to the workpiece W in a cantilever state. Therefore, the main support member 121 near the free end is raised, and the free end is supported from below. Thereby, deformation of the workpiece W during machining can be suppressed.

[0052] In addition, the jig device 100 includes a first moving mechanism (not shown) that moves the main support mechanism 120 on the worktable 210. This first moving mechanism moves the main support mechanism 120 in the X direction orthogonal to the Z direction which is the main shaft direction. As an example, the first moving mechanism includes a slider that moves linearly. Moreover, the stage 220 on which the main support mechanism 120 is placed is fixed to the slider, and the two move together. Further, the jig device 100 includes a second moving mechanism (not shown) that moves the main support mechanism 120 in the Y direction orthogonal to the Z direction.

[0053] Alternatively, the moving mechanism for moving the stage 220 may be an air-floating type moving mechanism that supplies air from below the main support mechanism 120 to move the floating stage 220. In addition, the jig device 100 may include a rotational moving mechanism that rotates the stage 220 about a rotation axis parallel to the main shaft direction as the moving mechanism for moving the stage 220. For example, the jig device 100 may include a rotating table on which the stage 220 is placed as the rotational moving mechanism.

[0054] Alternatively, the main support mechanism 120 may have one or a small number of main support members 121. In this case, the main support mechanism 120 moves in the X direction and the Y direction orthogonal to the Z direction which is the main shaft direction. Thus, the main support mechanism 120 can change the contact position where the main support member 121 contacts the workpiece W in the XY plane according to the shape of the workpiece W. For example, the movement of the main support mechanism 120 in the X direction and the Y direction is controlled by the control device of the machine tool. And when the main support member 121 moves to be located below the workpiece W, the main drive unit 125 drives the main support member 121.

[0055] In addition, when machining the workpiece W, a cover (not shown) for waterproofing or dustproofing is provided on the spindle side of the main support mechanism 120. Thus, the periphery of the main support member 121 is covered by the cover. Therefore, it is possible to prevent liquids such as water or dust such as chips from accumulating around the main support member 121.

[0056] In addition, through holes are formed in the cover at positions corresponding to the main support member 121. That is, the number of through holes corresponding to the number of main support members 121 is formed in the cover. Moreover, the tip of the main support member 121 protrudes from the through hole. Therefore, the main support member 121 driven by the main drive unit 125 protrudes through the through hole. As a result, the portion above the main support member 121 located at the spindle direction support position protrudes from the through hole.

[0057] [Second axial direction support mechanism]

[0058] As Figure 1 shown, the jig device 100 includes a sub-support mechanism 130 disposed on the side opposite to the holding mechanism 110 with respect to the main support mechanism 120. Moreover, as Figure 3 shown, the sub-support mechanism 130 has a sub-support member 131 as an example of a second axial direction support member. When a first axial direction orthogonal to the spindle direction and a second axial direction orthogonal to the spindle direction and the first axial direction are defined, the sub-support member 131 faces the workpiece W in the second axial direction. In addition, Figure 3 shows the sub-support mechanism 130 in the standby position as viewed from the viewing direction A of Figure 1 .

[0059] Here, the first axial direction refers to the direction from the end (holding end) of the workpiece W held by the holding mechanism 110 toward the free end. For example, in the Figure 3 example, the sub-support member 131 faces the workpiece W (not shown) in the Y direction orthogonal to the Z direction as the spindle direction. That is, in the Figure 3 example, the holding mechanism 110 holds one end of the workpiece W in the X direction.

[0060] In addition, when the direction extending from the holding end of the workpiece W held by the holding mechanism 110 toward the free end is the X direction, the second axial direction is the Y direction. And the sub-support member 131 supports the workpiece W in the Y direction. On the other hand, when the direction extending from the holding end of the workpiece W held by the holding mechanism 110 toward the free end is the Y direction, the second axial direction is the X direction. And the sub-support member 131 supports the workpiece W in the X direction. That is, the sub-support mechanism 130 supports the workpiece W by supporting the load applied to the sub-support mechanism 130 via the held workpiece W.

[0061] In addition, the sub-support mechanism 130 includes a sub-driving unit 135 as an example of a second axial direction driving component that drives the sub-support member 131. In the second axial direction, the sub-driving unit 135 drives the sub-support member 131 between a second axial direction support position where the sub-support member 131 contacts the workpiece W and a second axial direction retracted position where the sub-support member 131 is separated from the workpiece W. Specifically, in the Y direction as the second axial direction, the sub-driving unit 135 causes the sub-support member 131 located at Figure 3 the second axial direction retracted position shown to protrude toward the second axial direction support position. Moreover, in the Y direction, the sub-driving unit 135 causes the sub-support member 131 that has protruded to the second axial direction support position to retract toward the second axial direction retracted position.

[0062] Specifically, with reference to Figure 3 and Figure 4 , the driving of the sub-support member 131 will be described. In addition, Figure 3 is a schematic perspective view of the sub-support member 131 located at the second axial direction retracted position. In addition, Figure 4 is a schematic perspective view of the jig device 100 in which the sub-support member 131 is located at the second axial direction support position. In Figure 3 and Figure 4 , one of a pair of sub-support members 131 arranged in a manner of sandwiching the workpiece W is shown. The tip of the sub-support member 131 is flat, and its tip surface contacts the workpiece W. Alternatively, the tip of the sub-support member 131 may have other shapes such as a spherical shape or a hemispherical shape.

[0063] Each sub-support member 131 is a substantially cylindrical member that is displaced from the second axial direction retracted position toward the second axial direction support position. Moreover, the sub-support member 131 is driven under the action of the power supplied from the sub-driving unit 135. For example, the sub-support member 131 is driven by electricity, air pressure, hydraulic pressure, or the spring force of a compression spring. As an example, the sub-support member 131 is a pin or a rod of a linear actuator such as a solenoid actuator, a feed screw, a cylinder, or a hydraulic cylinder.

[0064] Moreover, the protrusion of the sub-support member 131 stops when it contacts the workpiece W. After that, the protrusion and retraction of the sub-support member 131 are restricted. Thus, the load applied to the workpiece W held in a cantilever state by the chuck 111 in the Y direction is supported by the sub-support member 131. After that, when the machining is completed, the sub-support member 131 retracts. Moreover, the retracted sub-support member 131 stops at the second axial direction retracted position.

[0065] The sub-support mechanism 130 is configured to be able to change the position of the sub-support member 131 in a parallel plane parallel to the spindle direction and the first axis direction. Specifically, the sub-support mechanism 130 has a parallel rotation mechanism 136 that rotates the sub-support member 131 about a parallel rotation axis Y3 parallel to the second axis direction, so as to be able to change the position of the sub-support member 131 in the parallel plane. In Figure 3 In the example, the parallel rotation mechanism 136 of the sub-support mechanism 130 rotates the sub-support member 131 in the ZX plane, which is a parallel plane parallel to the Z direction as the spindle direction and the X direction as the first axis direction.

[0066] That is, in Figure 3 the parallel rotation axis Y3 indicated by the one-dot chain line is parallel to the Y direction as the second axis direction. Moreover, the parallel rotation mechanism 136 rotates the sub-support member 131 about the parallel rotation axis Y3. For this purpose, the parallel rotation mechanism 136 includes a drive device that outputs a rotational motion, a transmission mechanism such as gears that transmits the rotation output from the drive device, and a rotating shaft. The rotating shaft is inserted into a shaft hole (not shown) of the sub-support arm 138. Moreover, the sub-support arm 138 provided with the sub-support member 131 rotates together with the rotating shaft inserted into the shaft hole.

[0067] Thereby, the sub-support member 131 rotates in the ZX plane along the Figure 3 rotation direction B. Moreover, along the rotation locus of the sub-support member 131, the position of the sub-support member 131 and the contact position between the sub-support member 131 and the workpiece W change. In addition, the parallel rotation mechanism 136 can adjust the position of the sub-support member 131 in the ZX plane by adjusting the rotation angle.

[0068] In addition, the jig device 100 has a first moving mechanism that moves the sub-support mechanism 130. Moreover, the first moving mechanism moves the sub-support mechanism 130 on the workbench 210. Specifically, the first moving mechanism moves the sub-support mechanism 130 together with the main support mechanism 120 in the X direction as the second axis direction orthogonal to the Z direction. That is, the sub-support mechanism 130 is fixed to the stage 220 shared with the main support mechanism 120.

[0069] Moreover, the jig device 100 has a second moving mechanism (not shown) that moves the sub-support mechanism 130 in the Y direction orthogonal to the Z direction. Moreover, the second moving mechanism moves the sub-support mechanism 130 together with the main support mechanism 120 in the Y direction. Alternatively, the sub-support mechanism 130 may be configured to move in at least one of the X direction and the Y direction separately from the main support mechanism 120. That is, the jig device 100 may have an independent moving mechanism that only moves the sub-support mechanism 130 in at least one of the X direction and the Y direction.

[0070] For example, the sub-driving unit 135 and the parallel rotation mechanism 136 are controlled by the control device of the machine tool. Moreover, the parallel rotation mechanism 136 rotates the sub-support member 131 to a position corresponding to the shape of the workpiece W recognized by the control device. As an example, the parallel rotation mechanism 136 rotates the sub-support member 131 located at the Figure 3 standby position shown by 90 degrees, and rotates and moves the sub-support member 131 to the Figure 4 operation position shown. After that, the sub-driving unit 135 causes the sub-support member 131 to protrude according to the control of the control device.

[0071] The sub-support mechanism 130 has at least two sub-support members 131 that sandwich the workpiece W from both sides in the second axis direction. Specifically, as shown in Figure 3 , the tip of the sub-support arm 138 branches into two. Moreover, sub-support members 131 are respectively arranged at the two tips. Thus, it is possible to support the workpiece W from both sides in the second axis direction (for example, the Y direction). In addition, the number of the sub-support members 131 is not limited to two, and three or more sub-support members 131 may be arranged in such a manner as to sandwich the workpiece W from both sides in the second axis direction.

[0072] When machining a workpiece W in a cantilever state, a load is sometimes applied to the workpiece W in the second axis direction (for example, the X direction or the Y direction) orthogonal to the main axis direction (for example, the Z direction) and in the second axis direction orthogonal to the direction extending from the holding end portion of the workpiece W toward the free end portion. For example, when machining a plate-shaped workpiece W with the narrower-width end face facing upward, the wider-width sides are arranged in the second axis direction. At this time, the second axis direction becomes the direction corresponding to the thinner wall thickness, and thus if a load is applied in the second axis direction, the workpiece W will be deformed. For example, when cutting the above-mentioned end face using an end mill, a load is applied in the tangential direction of the end mill, and as a result, a load is applied to the workpiece W in the second axis direction. In this regard, according to the jig device 100 provided with the sub-support mechanism 130, even if a load is applied in the second axis direction, the workpiece W can be supported to suppress deformation of the workpiece W.

[0073] Alternatively, the sub-support member 131 may also be arranged to support the workpiece W from one side in the second axis direction. That is, the sub-support member 131 may be arranged only at a position opposite to one side of the workpiece W. In this case, it is also possible to support the workpiece W from one side. That is, when machining a workpiece W in a cantilever state, in the second axis direction, a load is sometimes mainly applied from one side of the workpiece W toward the other side. In this case, the sub-support member 131 may also be arranged only at a position opposite to the other side of the workpiece W.

[0074] The jig device 100 according to the embodiment described above can improve the machining efficiency of the workpiece W corresponding to various machining conditions applied to the workpiece W. For example, when changing the machining surface, the workpiece W can be switched inside the machine tool without stopping the machine tool. Thereby, the stop time of the machine tool can be reduced, and the machining efficiency of the workpiece W can be improved. In addition, the jig device 100 of the present embodiment can be provided on various machine tools. For example, the jig device 100 can be loaded and unloaded with respect to machine tools such as a five-axis machining center or a three-axis machining center. Further, as an example, the driving device of the main support member 121 or the sub-support member 131 described above is a hydraulic motor, an electric motor, an ultrasonic motor, or the like.

[0075] The present invention has been described above with reference to each embodiment, but the present invention is not limited to the above embodiments. Inventions modified within the scope not violating the present invention and inventions equivalent to the present invention are also included in the present invention. In addition, each embodiment, each modification, and the technical means included in each embodiment or each modification can be appropriately combined within the scope not violating the present invention.

[0076] For example, the workpiece W may be machined while being supported by the main support mechanism 120, and then the chuck 111 may be rotated 90 degrees. Thereby, for example, after machining the upper surface on the spindle 200 side of the workpiece W, the side surface of the workpiece W (i.e., the surface orthogonal to the upper surface and the lower surface) can be machined while being supported by the main support mechanism 120 and the sub-support mechanism 130. Therefore, the workpiece W can be machined into a complex shape without stopping the machine tool.

[0077] Specifically, as shown in the schematic perspective view of the jig device 100, Figure 4 the side surface of the workpiece W can be machined while being supported by the main support mechanism 120 and the sub-support mechanism 130. That is, first, as shown in Figure 2 , while the workpiece W is supported by the main support mechanism 120, the upper surface of the workpiece W is machined. After that, the chuck 111 of the holding mechanism 110 is rotated 90 degrees about a rotation axis parallel to the X direction. Thereby, the side surface of the workpiece W located on the Figure 2 inner side or the front side in the figure faces the spindle 200. Therefore, the side surface of the workpiece W can be machined without stopping the machine tool.

[0078] As other examples, the jig device 100 may be arranged in a suspended state on the upper side in the gravitational direction, and the main spindle 200 of the machine tool may be arranged on the lower side in the gravitational direction. In this case, powdery substances generated by machining, such as chips, fall toward the main spindle 200. Therefore, accumulation of powdery substances at the machining position can be suppressed. In addition, the jig device 100 may be installed in a posture rotated 90 degrees with respect to the worktable 210. In this case, the main spindle direction is orthogonal to the gravitational direction. Thus, the jig device 100 can be installed on a five-axis machining center or a horizontal machining center to machine the workpiece W.

[0079] In addition, the main support mechanism 120 may be configured to rotate integrally with the sub-support mechanism 130 about a rotation axis parallel to the X direction or the Y direction. That is, the main support mechanism 120 may include a rotation device that rotates the main support mechanism 120 and the sub-support mechanism 130 about this rotation axis. For example, the rotation device rotates the stage 220 on which the main support mechanism 120 and the sub-support mechanism 130 are placed about a rotation axis parallel to the X direction or the Y direction. As an example, the rotation device rotates the stage 220 90 degrees about a rotation axis parallel to the X direction. In this case, the main spindle direction is orthogonal to the gravitational direction. Thus, the jig device 100 can be installed on a five-axis machining center or a horizontal machining center to machine the workpiece W.

[0080] Moreover, the main support mechanism 120 may be configured to rotate separately from the sub-support mechanism 130 about a rotation axis parallel to the X direction or the Y direction. That is, the main support mechanism 120 may include a rotation device that rotates only the main support mechanism 120 about this rotation axis without rotating the sub-support mechanism 130 about this rotation axis. Similarly, the sub-support mechanism 130 may be configured to rotate separately from the main support mechanism 120 about a rotation axis parallel to the X direction or the Y direction. That is, the sub-support mechanism 130 may include a rotation device that rotates only the sub-support mechanism 130 about this rotation axis without rotating the main support mechanism 120 about this rotation axis.

[0081] In addition, one of the main support mechanism 120 and the sub-support mechanism 130 may be omitted. For example, the jig device 100 may include only the main support mechanism 120. Moreover, the jig device 100 may include only the sub-support mechanism 130. As an example, in the jig device 100 including only the sub-support mechanism 130, the workpiece W fixed on the stage 220 can be machined. In this case, the workpiece W can also be supported from the Y direction or the Z direction orthogonal to the main spindle direction.

[0082] [Modification method]

[0083] Refer to Figure 5 and Figure 6, the jig device 300 for the deformation method will be described. Figure 5 is a schematic perspective view of the jig device 300 observed from obliquely above. Additionally, Figure 6 is a schematic explanatory view for explaining the hole clamping device 140. Furthermore, in the description of the deformation method, the differences from the above-described embodiment will be mainly described, and the same reference numerals will be assigned to the components that have been described, and their descriptions will be omitted. Unless otherwise specified, the components assigned the same reference numerals perform substantially the same operations and functions, and their effects are also substantially the same.

[0084] In addition, in Figure 5 , for ease of explanation, the illustration of the sub-support mechanism 130 ( Figure 1 ), which is an example of the second-axis direction support mechanism, is omitted. However, the jig device 300 includes a sub-support mechanism 130 not shown. As an example, the sub-support mechanism 130 is disposed at a position sandwiching the hole clamping device 140 with the main support mechanism 120, which is an example of the main-axis direction support mechanism. In other words, the sub-support mechanism 130 is disposed on the side opposite to the main support mechanism 120 with respect to the hole clamping device 140.

[0085] As Figure 5 shows, the jig device 300 includes a holding mechanism 110 that holds the workpiece W3 in a cantilever state, and a jig unit U3. Moreover, the jig unit U3 includes a hole clamping device 140, which is an example of a restraining mechanism that restrains a part of the workpiece W3, to restrict the displacement of the workpiece W3 in the direction parallel to the spindle direction of the machine tool (hereinafter, also referred to as the Z direction). And the jig unit U3 includes a main support mechanism 120 and a sub-support mechanism 130 not shown. Alternatively, the jig unit U3 may not include at least one of the main support mechanism 120 and the sub-support mechanism 130.

[0086] In addition, the hole clamping device 140 is disposed at a position sandwiching the main support mechanism 120 with the holding mechanism 110. In other words, the hole clamping device 140 is disposed on the side opposite to the holding mechanism 110 with respect to the main support mechanism 120. Moreover, the hole clamping device 140 restrains the protruding portion PP that protrudes from the main body of the workpiece W3 as a part of the workpiece W3. The protruding portion PP extends from the main body of the workpiece W3 to be processed and is the remaining portion that is not to be processed.

[0087] In Figure 5In the example, the protruding portion PP is the free end of the workpiece W3. That is, when the holding mechanism 110 holds the holding end of the workpiece W3 in the X direction, the other end of the workpiece W3 in the X direction is the protruding portion PP. However, the protruding portion PP may not be a free end. For example, it may also be a side edge portion extending in the X direction of the workpiece W3. In addition, the outer shape of the protruding portion PP is arbitrary. As an example, it may also have a polygonal shape, a circular shape, an elliptical shape, and other shapes. Moreover, a part of the workpiece W3 constrained by the hole clamping device 140 may also be the remaining part continuous with the main body of the workpiece W3 (such as a side edge portion).

[0088] With such a hole clamping device 140, during machining, displacement of the workpiece W3 in the Z direction can be suppressed, that is, position deviation or vibration of the workpiece W3 in the main shaft direction can be suppressed. Therefore, during machining, it is possible to prevent the workpiece W3 from leaving the main support mechanism 120, that is, the workpiece W3 from displacing toward the main shaft 200. For example, sometimes the holding mechanism 110 holds the workpiece W3 with the X direction or the Y direction parallel to the gravity direction. Specifically, sometimes the main shaft direction is orthogonal to the gravity direction, and the hole clamping device 140 is located below or above the main support mechanism 120.

[0089] For the workpiece W3 in this state, a force from the machining device is applied in the Z direction horizontal with respect to the gravity direction. Moreover, gravity is not applied in the Z direction from the workpiece W3 toward the main support mechanism 120. Therefore, gravity that presses the workpiece W3 is not applied to the main support mechanism 120, and displacement of the workpiece W3 in the direction away from the main support mechanism 120 cannot be suppressed. However, according to the hole clamping device 140, even in this case, by constraining the protruding portion PP, separation of the workpiece W3 from the main support mechanism 120 can be suppressed.

[0090] Alternatively, the jig unit U3 may also be provided with other constraint mechanisms instead of or in addition to the hole clamping device 140. As an example, the other constraint mechanism is an adsorption device that adsorbs and constrains a part of the workpiece W3, a hook that hooks onto a part of the workpiece W3, or a holding device that grasps a part of the workpiece W3, etc. In this case, the part constrained by the other constraint mechanism may also be a part of the machining object part of the workpiece W3 or the remaining part of the workpiece W3, etc. In addition, the other constraint mechanism may also be a mechanism that constrains the workpiece W3 from the main shaft 200 side. However, by constraining the workpiece W3 from the side opposite to the main shaft 200, it is possible to avoid interfering with the support of the workpiece W3 by the sub-support mechanism 130.

[0091] Moreover, the jig unit U3 is provided with a moving device 149 that moves the hole clamping device 140 forward and backward in the Z direction. When the hole clamping device 140 restrains the workpiece W3, the moving device 149 moves the hole clamping device 140 in a manner approaching the workpiece W3. In addition, after releasing the restraint based on the hole clamping device 140, the moving device 149 moves the hole clamping device 140 away from the workpiece W3. Alternatively, the moving device 149 may move the workpiece support portion 141 of the hole clamping device 140 forward and backward in the Z direction.

[0092] [Constraint mechanism]

[0093] Refer to Figure 6 A of Figure 6 and B of Figure 6 to describe the hole clamping device 140. In addition, Figure 6 both A of Figure 6 and B of Figure 6 are cross-sections extending in the wall thickness direction of the workpiece W3 and are schematic views of cross-sections passing through the central axis (not shown) of the hole H. Moreover,

[0094] The hole clamping device 140 performs the following operation: It pushes inward inside the hole H formed in the protrusion PP and pulls the workpiece W3 toward the hole clamping device 140. For this purpose, as shown in Figure 6 A of Figure 6 and B of Figure 6 the hole clamping device 140 has a workpiece support portion 141 and a rod 142 that moves forward and backward relative to the workpiece support portion 141. In addition, in the examples of Figure 6 A of

[0095] and B of Figure 6 the hole H is a through hole, but the hole H may also be a non-through hole (i.e., a blind hole). Moreover, for the workpiece W3, as the portion restrained by the hole clamping device 140, it may also have a hole formed in the portion to be processed instead of the protrusion PP.

[0096] As shown in Figure 6 A of before pulling in, the pushing member 144 retracts inside the cap 143. After that, the rod 142 moves towardFigure 6 in the direction indicated by arrow A1 of B (i.e., Figure 6 the downward direction in B). Then, the pushing member 144 moves along the tapered surface at the top of the rod 142 from the cap 143 to the outside in the direction of arrow A2 (i.e., Figure 6 the left - right direction in B). Then, the pushing member 144 abuts against and bites into the inner surface of the hole H. Then, the hole clamping device 140 pulls the workpiece W3 in the direction of arrow A3 (i.e., Figure 6 the downward direction in B) by using air pressure or the like. Thus, the workpiece W3 is pressed against the supporting surface of the workpiece supporting portion 141, and the workpiece W3 is constrained by the hole clamping device 140.

[0097] Moreover, when releasing the constraint on the workpiece W3, the hole clamping device 140 moves the rod 142 in the direction opposite to the direction of arrow A1 (i.e., Figure 6 the upward direction in B) by supplying air pressure. Thus, the force applied to the pushing member 144 by the top of the rod 142 is released. Then, the pushing member 144 is urged by an elastic member (not shown) (such as a spring or an elastic ring, etc.) and moves to its original position inside the cap 143. That is, the pushing member 144 retracts in the direction opposite to the direction of arrow A2. Thus, the constraint of the hole clamping device 140 on the workpiece W3 is released.

[0098] As described above, the jig device 300 and the jig unit U3 include a constraint mechanism for constraining a part of the workpiece W3. Thus, during the machining of the workpiece W3, it is possible to suppress the deflection and displacement of the workpiece W3 in the Z - direction. Therefore, during the machining of the workpiece W3, it is possible to prevent the workpiece W3 from separating from the self - supporting mechanism 120.

[0099] In addition, the constraint mechanism such as the hole clamping device 140 only needs to restrict the movement of the workpiece W3 in the direction away from the main supporting mechanism 120. Therefore, the constraint mechanism may not pull the workpiece W3 toward the constraint mechanism or the main supporting mechanism 120. For example, the constraint mechanism may also constrain the workpiece W3 only by holding it in a way that grasps a part of the workpiece W3. Moreover, the hole clamping device 140 may not pull the workpiece W3, but only restrict its movement in the direction away from the hole clamping device 140.

[0100] Part or all of the above - described embodiments may be described as follows in the following supplementary notes, but are not limited to the following.

[0101] (Supplementary Note 1)

[0102] A jig device, which is a jig device for a workpiece in a machine tool, wherein,

[0103] This jig device includes:

[0104] A holding mechanism that holds the workpiece in a cantilever state; and

[0105] A main axis direction support mechanism having at least one main axis direction support member and a main axis direction drive member. The main axis direction support member is disposed opposite to the workpiece held in a cantilever state by the holding mechanism from the opposite side of the main axis in the main axis direction of the machine tool, and the main axis direction drive member drives the main axis direction support member between a main axis direction support position in contact with the workpiece and a main axis direction retracted position away from the workpiece in the main axis direction,

[0106] The main axis direction support mechanism is configured to be able to change a contact position where the main axis direction support member contacts the workpiece in an orthogonal plane orthogonal to the main axis direction.

[0107] (Supplementary Note 2)

[0108] The jig device according to Supplementary Note 1, wherein,

[0109] The main axis direction support mechanism has a plurality of the main axis direction support members disposed at different positions in the orthogonal plane,

[0110] The plurality of main axis direction support members are divided such that each driving unit driven by the main axis direction drive member includes at least one of the main axis direction support members,

[0111] The main axis direction drive member drives each main axis direction support member for each of the driving units.

[0112] (Supplementary Note 3)

[0113] The jig device according to Supplementary Note 1 or 2, wherein,

[0114] The holding mechanism has a rotation mechanism that rotates the workpiece about one rotation axis orthogonal to the main axis direction.

[0115] (Supplementary Note 4)

[0116] The jig device according to Supplementary Note 1 or 2, wherein,

[0117] The holding mechanism has: a first rotation mechanism that rotates the workpiece about a first rotation axis orthogonal to the main axis direction; and a second rotation mechanism that rotates the workpiece about a second rotation axis orthogonal to the main axis direction and the first rotation axis.

[0118] (Supplementary Note 5)

[0119] The jig device according to any one of Supplementary Notes 1 to 4, wherein,

[0120] The jig device further includes a second-axis-direction support mechanism having a second-axis-direction support member. When a first axis direction orthogonal to the main axis direction and a second axis direction orthogonal to both the main axis direction and the first axis direction are defined, the second-axis-direction support member faces the workpiece in the second axis direction.

[0121] The holding mechanism holds one end portion of the workpiece in the first axis direction.

[0122] The second-axis-direction support mechanism has a second-axis-direction driving member that drives the second-axis-direction support member between a second-axis-direction support position in contact with the workpiece and a second-axis-direction retracted position away from the workpiece in the second axis direction.

[0123] (Supplementary Note 6)

[0124] The jig device according to Supplementary Note 5, wherein

[0125] The second-axis-direction support mechanism is configured to be able to change the position of the second-axis-direction support member in a parallel plane parallel to the main axis direction and the first axis direction.

[0126] (Supplementary Note 7)

[0127] The jig device according to Supplementary Note 5 or 6, wherein

[0128] The second-axis-direction support mechanism has at least two second-axis-direction support members to sandwich the workpiece from both sides in the second axis direction.

[0129] (Supplementary Note 8)

[0130] The jig device according to any one of Supplementary Notes 1 to 7, wherein

[0131] The jig device further includes a restraint mechanism that restrains a part of the workpiece in a manner that restricts displacement of the workpiece in the main axis direction.

[0132] The restraint mechanism is disposed at a position sandwiching the main-axis-direction support mechanism with the holding mechanism.

[0133] (Supplementary Note 9)

[0134] A jig unit for a jig device for a workpiece held in a cantilever state in a machine tool, wherein

[0135] The jig unit includes a spindle-direction support mechanism. The spindle-direction support mechanism has at least one spindle-direction support member and a spindle-direction drive component. The spindle-direction support member is disposed opposite to the workpiece on the side opposite to the spindle in the spindle direction of the machine tool, relative to the workpiece held in a cantilever state. The spindle-direction drive component drives the spindle-direction support member in the spindle direction between a spindle-direction support position in contact with the workpiece and a spindle-direction retracted position away from the workpiece.

[0136] The spindle-direction support mechanism is configured to be able to change the contact position where the spindle-direction support member contacts the workpiece in an orthogonal plane orthogonal to the spindle direction.

[0137] (Supplementary Note 10)

[0138] A jig device, which is a jig device for a workpiece in a machine tool, wherein,

[0139] The jig device includes:

[0140] A holding mechanism that holds the workpiece in a cantilever state; and

[0141] A second-axis-direction support mechanism that has a second-axis-direction support member. When a first axis direction orthogonal to the spindle direction and a second axis direction orthogonal to both the spindle direction and the first axis direction are defined, the second-axis-direction support member faces the workpiece in the second axis direction.

[0142] The holding mechanism holds one end of the workpiece on the first axis direction side.

[0143] The second-axis-direction support mechanism has a second-axis-direction drive component that drives the second-axis-direction support member in the second axis direction between a second-axis-direction support position in contact with the workpiece and a second-axis-direction retracted position away from the workpiece.

[0144] (Supplementary Note 11)

[0145] The jig device according to Supplementary Note 10, wherein,

[0146] The second-axis-direction support mechanism is configured to be able to change the position of the second-axis-direction support member in a parallel plane parallel to the spindle direction and the first axis direction.

[0147] (Supplementary Note 12)

[0148] The jig device according to Supplementary Note 11, wherein,

[0149] The second-axis direction support mechanism has a parallel rotation mechanism that rotates the second-axis direction support member about a parallel rotation axis parallel to the second-axis direction, so as to be able to change the position of the second-axis direction support member in the parallel plane.

[0150] (Appendix 13)

[0151] The jig device according to Appendix 10 or 11, wherein,

[0152] The second-axis direction support mechanism has at least two of the second-axis direction support members to sandwich the workpiece from both sides in the second-axis direction.

[0153] (Appendix 14)

[0154] The jig device according to any one of Appendices 10 to 13, wherein,

[0155] The holding mechanism has a rotation mechanism that rotates the workpiece about a rotation axis orthogonal to the main axis direction.

[0156] (Appendix 15)

[0157] The jig device according to any one of Appendices 10 to 13, wherein,

[0158] The holding mechanism has: a first rotation mechanism that rotates the workpiece about a first rotation axis orthogonal to the main axis direction; and a second rotation mechanism that rotates the workpiece about a second rotation axis orthogonal to the main axis direction and the first rotation axis.

[0159] (Appendix 16)

[0160] A jig unit for a jig device of a workpiece held in a cantilever state in a machine tool, wherein,

[0161] The jig unit includes a second-axis direction support mechanism having a second-axis direction support member that faces the workpiece in the second-axis direction when a first axis direction orthogonal to the main axis direction and a second axis direction orthogonal to the main axis direction and the first axis direction are defined.

[0162] The second-axis direction support mechanism has a second-axis direction drive member that drives the second-axis direction support member between a second-axis direction support position in contact with the workpiece and a second-axis direction retracted position away from the workpiece in the second-axis direction.

[0163] This application claims priority from Japanese Patent Application No. 2022-140675 filed on September 5, 2022, Japanese Patent Application No. 2022-140666 filed on September 5, 2022, and Japanese Patent Application No. 2023-18112 filed on February 9, 2023, the entire contents of which are incorporated herein by reference as part of this application.

[0164] Explanation of Reference Numerals

[0165] 100, jig device; 110, holding mechanism; 112, rotating mechanism (first rotating mechanism); 120, main support mechanism (main shaft direction support mechanism); 121, main support member (main shaft direction support member); 125, main drive unit (main shaft direction drive component); 130, sub-support mechanism (second axis direction support mechanism); 131, sub-support member (second axis direction support member); 135, sub-drive unit (second axis direction drive component); 136, parallel rotation mechanism; 140, hole clamping device (constraint mechanism); 200, main shaft; 210, worktable; 300, jig device; U, jig unit; W, workpiece; W3, workpiece; X1, rotation axis (first rotation axis); Y2, rotation axis (second rotation axis); Y3, parallel rotation axis.

Claims

1. A machine tool, comprising a jig device for a workpiece and a control device, wherein: The jig device includes: A holding mechanism that holds the workpiece in a cantilever state; And A main axis direction support mechanism having a plurality of main axis direction support members and a main axis direction drive member. The main axis direction support members are arranged opposite to the workpiece on the opposite side of the main axis in the main axis direction of the machine tool with respect to the workpiece held in a cantilever state by the holding mechanism, and the main axis direction drive member drives the main axis direction support members between a main axis direction support position in contact with the workpiece and a main axis direction retracted position away from the workpiece in the main axis direction. The control device selects the main axis direction support member located at a position corresponding to the shape of the workpiece among the plurality of main axis direction support members located at the main axis direction retracted position. The control device controls the main axis direction drive mechanism to drive the selected main axis direction support member to the main axis direction support position at the moment when the holding of the workpiece by the holding mechanism is completed, or at the moment when the rotation of the holding mechanism holding the workpiece is completed.

2. The machine tool according to claim 1, wherein: The control device acquires determination information for determining the main axis direction support member to be the driving object. Selects the main axis direction support member located at a position corresponding to the shape of the workpiece according to the determination information.

3. The machine tool according to claim 1, wherein: The control device identifies the shape of the workpiece through a detection device. Selects the main axis direction support member located at a position corresponding to the identified shape of the workpiece.

4. The machine tool according to claim 1, wherein: The main axis direction support mechanism is configured to be movable in a direction orthogonal to the main axis direction. The control device moves the main axis direction support mechanism according to the shape of the workpiece.

5. The machine tool according to any one of claims 1 to 4, wherein: The control device controls the main axis direction drive mechanism to drive the selected main axis direction support member to the main axis direction retracted position at the moment when the workpiece is processed after the selected main axis direction support member is driven to the main axis direction support position.

6. A machine tool, having a jig device for a workpiece and a control device, wherein: The jig device includes: A holding mechanism that holds the workpiece in a cantilever state; and A second axis direction support mechanism having a second axis direction support member. When a first axis direction orthogonal to the main axis direction and a second axis direction orthogonal to the main axis direction and the first axis direction are defined, the second axis direction support member faces the workpiece in the second axis direction. The holding mechanism holds one end of the workpiece on one side in the first axis direction. The second-axis direction support mechanism includes a second-axis direction drive member that drives the second-axis direction support member between a second-axis direction support position in contact with the workpiece and a second-axis direction retracted position away from the workpiece in the second-axis direction, and the second-axis direction support mechanism is configured to be able to change the position of the second-axis direction support member in a parallel plane parallel to the spindle direction and the first-axis direction. The control device controls the second-axis direction drive mechanism so that the second-axis direction support member located at the second-axis direction retracted position moves to an operating position in the parallel plane and drives the second-axis direction support member located at the operating position toward the second-axis direction support position.

7. A drive control method, which is a drive control method for a jig device that uses a computer to drive and control the jig device. The jig device includes: A holding mechanism that holds a workpiece in a cantilever state; and A spindle direction support mechanism having a plurality of spindle direction support members and a spindle direction drive member. The spindle direction support members are arranged opposite to the workpiece from the opposite side of the spindle in the spindle direction of the machine tool with respect to the workpiece held in a cantilever state by the holding mechanism. The spindle direction drive member drives the spindle direction support member between a spindle direction support position in contact with the workpiece and a spindle direction retracted position away from the workpiece in the spindle direction. Among them, The drive control method includes the following steps: A step in which the computer selects the spindle direction support member located at a position corresponding to the shape of the workpiece among the plurality of spindle direction support members located at the spindle direction retracted position; and A step in which the computer controls the spindle direction drive member to drive the selected spindle direction support member toward the spindle direction support position at the moment when the holding of the workpiece by the holding mechanism is completed or when the rotation of the holding mechanism holding the workpiece is completed.

8. The drive control method according to claim 7, wherein, The drive control method further includes the following steps: A step in which the computer controls the spindle direction drive mechanism to drive the selected spindle direction support member toward the spindle direction retracted position after the selected spindle direction support member is driven to the spindle direction support position and at the moment when the machining of the workpiece is completed.

9. A driving control method, which is a driving control method for a jig device that uses a computer to drive and control the jig device. The jig device includes: a holding mechanism that holds a workpiece in a cantilever state; and a second-axis direction support mechanism that has a second-axis direction support member. When a first axis direction orthogonal to the main axis direction and a second axis direction orthogonal to both the main axis direction and the first axis direction are defined, the second-axis direction support member faces the workpiece in the second axis direction. The holding mechanism holds one end of the workpiece on the first axis direction side, and the second-axis direction support mechanism has a second-axis direction driving component that drives the second-axis direction support member between a second-axis direction support position in contact with the workpiece and a second-axis direction retracted position away from the workpiece in the second axis direction. Moreover, the second-axis direction support mechanism is configured to be able to change the position of the second-axis direction support member in a parallel plane parallel to the main axis direction and the first axis direction. Among them, the driving control method includes the following steps: a step in which the computer moves the second-axis direction support member located at the second-axis direction retracted position to an action position in the parallel plane; and a step in which the computer controls the second-axis direction driving component to drive the second-axis direction support member located at the action position to the second-axis direction support position.

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