Tool turret

Abstract

This tool turret comprises: a support body (61); a rotating body (21) that has a plurality of attachment parts (41) to each of which a tool holder (200) can be attached, and that is supported by the support body (61) so as to be rotatable about a prescribed axis (110); a rotary connector (81) that has a movable part (82) that rotates together with the rotating body (21) and a fixed part (83) fixed to the support body (61) and forming an electrical contact with the movable part (82), and that is provided along the prescribed axis (110); a terminal (140) provided to the attachment part (41) and forming an electrical contact with the tool holder (200); a fixed-side wiring (130J) routed inside the tool turret and connected to the fixed part (83); and a movable-side wiring (130K) routed inside the tool turret and extending between the movable part (82) and the terminal (140).

Description

Tool rest

[0001] The present invention relates to a tool rest.

[0002] For example, Japanese Patent Application Laid-Open Publication No. 2021-35717 (Patent Document 1) discloses a tool holder module that can be attached to a tool holder turret. The tool holder module includes a support that can be detachably attached to the tool holder turret and that supports a tool that can be driven by the tool holder module, and a smart device that can be detachably attached to the support and that acquires data related to the tool holder module and communicates with a cloud computing system.

[0003] The smart device has a SIM card for communicating with the cloud computing system via a cellular communication network and a battery for power supply.

[0004] In addition, Japanese Patent Application Laid-Open Publication No. 2020-40202 (Patent Document 2) discloses a tool holder for a turret lathe, which includes a servo motor for positioning a tool base at a predetermined angular position, a transceiver module that communicates with an external source via Wi-Fi, NFC (Near Field Communication), or a Bluetooth network and transmits a drive signal to the servo motor, and a battery for supplying power to the servo motor and the transceiver module.

[0005] JP 2021-35717 A JP 2020-40202 A

[0006] A tool rest is known to have a tool holder attached thereto for holding a tool. The tool holder may be equipped with various sensors, such as a proximity sensor, a temperature sensor, or an acceleration sensor, and / or an actuator, such as a motor, for rotating a tool, such as a drill, or for pivoting the tool holder to change the orientation of the tool.

[0007] In the above-mentioned Patent Documents 1 and 2, wireless communication is used as a means for transmitting signals between the sensors and / or actuators and the outside. In this case, there is a possibility that communication reliability will be impaired due to crosstalk or restrictions on the amount of communication that can be performed simultaneously. Furthermore, in the above-mentioned Patent Documents 1 and 2, a battery is installed as a means for supplying power to the sensors and / or actuators. In this case, the installation of the battery may increase the size of the tool holder.

[0008] An object of the present invention is to provide a tool rest that improves the reliability of communication in electrical use in a tool holder and enables the tool holder to be made smaller.

[0009] A tool post according to the present invention comprises a support body, a rotating body which is supported by the support body so as to be rotatable about the predetermined axis and which has a plurality of mounting portions arranged circumferentially about a predetermined axis and each mounting portion can accommodate a tool holder, a movable portion which rotates about the predetermined axis together with the rotating body, a rotary connector which is fixed to the support body and has a fixed portion which makes electrical contact with the movable portion, and which is provided along the predetermined axis, terminals which are provided on the mounting portion and make electrical contact with the tool holder, fixed-side wiring which is routed inside the tool post and connected to the fixed portion, and movable-side wiring which is routed inside the tool post and extends between the movable portion and the terminal.

[0010] According to the present invention, it is possible to provide a tool rest that improves the reliability of communication in the electrical use of the tool holder and enables the tool holder to be made smaller.

[0011] 1 is a perspective view showing a tool rest in embodiment 1 of the present invention. FIG. 1 is a front view showing the tool rest in FIG. 1. FIG. 1 is a cross-sectional view showing the tool rest in FIG. 1. FIG. 2 is a perspective view showing the inverted holder (0° position). FIG. 3 is a perspective view showing the inverted holder (180° position). FIG. 4 is a cross-sectional view showing the bottom of the inverted holder. FIG. 5 is a cross-sectional view showing the internal structure of the inverted holder in FIG. 4. FIG. 6 is a cross-sectional view showing an enlarged view of a portion of the tool rest in FIG. 3. FIG. 7 is a cross-sectional view schematically showing the rotary connector in FIG. 8. FIG. 8 is a cross-sectional view showing the tool rest as viewed in the direction of the arrows on line X-X in FIG. 3. FIG. 9 is another cross-sectional view showing an enlarged view of a portion of the tool rest in FIG. 3. FIG. 10 is a perspective view showing an enlarged view of the tool rest in the range surrounded by the two-dot chain line XII in FIG. 1. FIG. 11 is a cross-sectional view showing the tool rest as viewed in the direction of the arrows on line XIII-XIII in FIG. 12. FIG. 12 is a cross-sectional view showing the attachment state of the second tool holder (inverted holder) to the attachment portion. FIG. 13 is a cross-sectional view showing an enlarged view of the area surrounded by the two-dot chain line XV in FIG. 14. FIG. 14 is a cross-sectional view showing the attachment state of the first tool holder to the attachment portion. FIG. 15 is a block diagram showing the electrical structure of the inverted holder in embodiment 1 of the present invention. 22. A block diagram showing a modified example of the electrical structure of the inverting holder in Figure 17. A front view showing a machine tool using a jig in embodiment 2 of the present invention. A block diagram showing the electrical structure of the jig in Figure 19. A block diagram showing a machine tool in an embodiment of the present invention. A block diagram showing a control system for screen display on the display unit in Figure 21. A diagram showing a first application screen on the display unit in Figure 21. A diagram showing a second application screen on the display unit in Figure 21. Another diagram showing the second application screen on the display unit in Figure 21. Yet another diagram showing the second application screen on the display unit in Figure 21. A flowchart showing the flow of display control of the display unit by the control device in Figure 22. A perspective view showing a machine tool.

[0012] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the accompanying drawings, in which the same or equivalent components are designated by the same reference numerals.

[0013] (Embodiment 1) [Overall Structure of Tool Post] Fig. 1 is a perspective view showing a tool post in embodiment 1 of the present invention. Fig. 2 is a front view showing the tool post in Fig. 1. Fig. 3 is a cross-sectional view showing the tool post in Fig. 1.

[0014] 1 to 3, a tool rest 100 is a device for holding a tool, and is provided in a machine tool.

[0015] A typical example of a machine tool is a lathe that performs workpiece machining (turning) by bringing a tool into contact with a rotating workpiece. The machine tool has a tool rest 100 and a workpiece spindle for rotating the workpiece. The tool rest 100 is equipped with a milling function for machining a workpiece by bringing a rotating tool into contact with a stationary workpiece.

[0016] As another example, the machine tool may be a multi-task machine that further has a tool spindle for rotating a tool in addition to the tool rest 100 and work spindle described above.

[0017] The machine tool is an NC (Numerically Controlled) machine tool in which various operations for machining a workpiece are automated by computer numerical control.

[0018] The tool rest 100 is provided in the machining area of ​​the machine tool. The machining area is a space where workpiece machining is performed, and is sealed by a cover to prevent foreign matter such as chips or coolant from leaking outside the machining area.

[0019] The tool rest 100 is configured to be able to hold a plurality of tools. The tool rest 100 is a turret-type tool rest that moves the held tools in the circumferential direction of a central rotation axis 110 to index the tool to be used for machining. The central rotation axis 110 extends parallel to the central axis of rotation of the workpiece in the machine tool.

[0020] The tool rest 100 includes a base 12 , a support 61 , a built-in motor 66 , and a rotating body (turret) 21 .

[0021] The base 12 is supported by the bed of the machine tool. The support body 61 is connected to the base 12. The built-in motor 66 is capable of outputting rotation about a rotation center axis 120. The rotation center axis 120 is perpendicular to the swivel center axis 110. The built-in motor 66 is a milling motor for rotating a tool held by a tool holder 210 (described later), and is built into the tool rest 100.

[0022] The revolving body 21 extends in a cylindrical shape around a revolving central axis 110. The revolving body 21 is supported by a support body 61 so as to be able to revolve around the revolving central axis 110. The revolving body 21 revolves around the revolving central axis 110 by transmitting rotation from a motor (not shown) mounted on the base 12.

[0023] The support body 61 has a motor housing 62 and an intermediate housing 67. The motor housing 62 supports a built-in motor 66. A stator of the built-in motor 66 is fixed to the motor housing 62. A rotor of the built-in motor 66 is supported by the motor housing 62 via a bearing (not shown). The motor housing 62 is connected to one end (front end) of the intermediate housing 67 in the axial direction of the turning center shaft 110.

[0024] The intermediate housing 67 has a cylindrical shape and extends around the central pivot axis 110. The intermediate housing 67 is disposed between the motor housing 62 and the base 12 in the axial direction of the central pivot axis 110. The base 12 is connected to the other end (rear end) of the intermediate housing in the axial direction of the central pivot axis 110.

[0025] The support body 61 further has a cylindrical portion 71. The cylindrical portion 71 has a cylindrical shape centered on the central pivot axis 110. The cylindrical portion 71 is connected to one end of the motor housing 62 in the axial direction of the central pivot axis 110. The motor housing 62 is disposed between the cylindrical portion 71 and the intermediate housing 67 in the axial direction of the central pivot axis 110.

[0026] The revolving unit 21 defines a first internal space 191. The revolving unit 21 has a hollow disk shape centered on the central revolving axis 110. The first internal space 191 is formed inside the revolving unit 21. The motor housing 62 and the intermediate housing 67 are disposed in the first internal space 191.

[0027] The revolving unit 21 has a plurality of mounting portions 41. As an example, the revolving unit 21 has twelve mounting portions 41. The mounting portions 41 are lined up in the circumferential direction of the revolving central axis 110. The mounting portions 41 are lined up at equal intervals in the circumferential direction of the revolving central axis 110. The mounting portions 41 form a ring shape centered on the revolving central axis 110. A motor housing 62 (built-in motor 66) is arranged inside the mounting portions 41.

[0028] A tool holder 210 is attached to the attachment portion 41. The tool holder 210 is capable of holding a tool. The tool holder 210 is fastened to the attachment portion 41 using bolts or the like. The tool holder 210 may have a built-in rotation transmission mechanism for transmitting the rotation output from the built-in motor 66 to the tool. The tool holder 210 may have a built-in clamping mechanism for clamping and unclamping the tool when the tool held in the tool holder 210 is automatically replaced.

[0029] The tool holders 210 are classified into a first tool holder 210S and a second tool holder 210T from the perspective of whether or not they have electrical contact with the tool rest 100. The first tool holder 210S cannot make electrical contact with the tool rest 100. The second tool holder 210T has a holder-side terminal 220 (see FIG. 6 described later) and can make electrical contact with the tool rest 100 via this holder-side terminal 220.

[0030] The revolving body 21 further includes a flange portion 32 and a housing portion 34. The flange portion 32, the housing portion 34, and the plurality of mounting portions 41 are integrally formed from metal. The plurality of mounting portions 41 are disposed between the flange portion 32 and the housing portion 34 in the axial direction of the revolving central axis 110.

[0031] The flange portion 32 widens like a brim around the central axis of rotation 110. The flange portion 32 is provided between the cylindrical portion 71 and the multiple mounting portions 41 in the radial direction of the central axis of rotation 110. The flange portion 32 is provided between a rotary connector 81 (described later) and the multiple mounting portions 41 in the radial direction of the central axis of rotation 110. The flange portion 32 faces the motor housing 62 in the axial direction of the central axis of rotation 110.

[0032] The flange portion 32 has a disk portion 32p and a tapered portion 32q. The disk portion 32p has an overall disk shape in which the axial direction of the central axis of rotation 110 corresponds to the thickness direction. The disk portion 32p is provided at a position spaced apart from the multiple mounting portions 41 in the axial direction of the central axis of rotation 110. The tapered portion 32q has a tapered cylindrical shape that extends around the central axis of rotation 110 while varying in diameter. The end of the tapered portion 32q on the small diameter side is connected to the outer periphery of the disk portion 32p. The end of the tapered portion 32q on the large diameter side is connected to the multiple mounting portions 41.

[0033] The flange portion 32 is fitted onto the outer periphery of the cylindrical portion 71. When the rotating body 21 rotates, the flange portion 32 rotates around the rotation central axis 110 while sliding relative to the cylindrical portion 71. The flange portion 32 is supported by the cylindrical portion 71 so as to be able to rotate around the rotation central axis 110.

[0034] The housing portion 34 has an overall cylindrical shape centered on the central pivot axis 110. One end of the housing portion 34 in the axial direction of the central pivot axis 110 is connected to the multiple mounting portions 41. The housing portion 34 is disposed on the outer periphery of the intermediate housing 67. A bearing 68 is interposed between the housing portion 34 and the intermediate housing 67.

[0035] The revolving unit 21 further includes a cover portion 36. The cover portion 36 is detachably attached to the flange portion 32 (disk portion 32p). The cover portion 36 is fastened to the flange portion 32 (disk portion 32p) using bolts or the like. The cover portion 36, together with the flange portion 32 (disk portion 32p), defines a second internal space 192. A rotary connector 81, which will be described later, is disposed in the second internal space 192.

[0036] As shown in FIG. 8 , the flange portion 32 has a first flange surface 32a and a second flange surface 32b. The first flange surface 32a is a plane perpendicular to the swivel axis 110. The first flange surface 32a is disposed in the second internal space 192. The first flange surface 32a faces the cover portion 36 with a gap in the axial direction of the swivel axis 110. The second flange surface 32b is disposed on the rear side of the first flange surface 32a. The second flange surface 32b is a plane perpendicular to the axial direction of the swivel axis 110. The second flange surface 32b is disposed in the first internal space 191. The second flange surface 32b faces the motor housing 62 with a gap in the axial direction of the swivel axis 110.

[0037] The cover portion 36 extends cylindrically around the pivot axis 110, and has a shape in which one end of the cover portion 36 in the axial direction of the pivot axis 110 is closed. The other end of the cover portion 36 in the axial direction of the pivot axis 110 abuts against the flange portion 32 (disk portion 32p). The cover portion 36 is provided at one end (front end) of the tool post 100 in the axial direction of the pivot axis 110.

[0038] The tool post 100 further includes a rotary connector 81. The rotary connector 81 is provided along the central pivot axis 110. The rotary connector 81 is provided inside the cylindrical portion 71. The structure of the rotary connector 81 will be described in detail later.

[0039] [Basic structure of second tool holder (reversed holder)] Fig. 4 is a perspective view showing the reversed holder (0° position). Fig. 5 is a perspective view showing the reversed holder (180° position). Fig. 6 is a perspective view showing the bottom of the reversed holder. Fig. 7 is a cross-sectional view showing the internal structure of the reversed holder in Fig. 4.

[0040] 4 to 7, the figures show an inversion holder 200 equipped with an inversion mechanism for changing the orientation of the tool T by 180° as an example of a second tool holder 210T capable of forming electrical contact with the tool post 100.

[0041] The inverted holder 200 has a holder body 310. The holder body 310 is capable of holding a tool T. As an example, the tool T is a turning tool having a shank 301 and a cutting edge 302. The shank 301 has a shaft shape extending in one direction. One end of the shank 301 is held by the holder body 310. The shank 301 extends in the radial direction of a swivel axis 150, which will be described later. The cutting edge 302 is made of a throw-away tip and is attached to the other end of the shank 301.

[0042] The holder main body 310 has a support portion 326 and a swivel portion 321. The support portion 326 is a portion that is fixed to the mounting portion 41 of the tool rest 100. The swivel portion 321 is supported by the support portion 326 so as to be swivelable about a swivel center axis 150. The swivel center axis 150 extends in the tangent direction of an arc that is centered on the swivel center axis 110 of the tool rest 100. The tool T (shank 301) is held by the swivel portion 321.

[0043] The reversing holder 200 further includes a rotation input key 331, a shaft 332, a first bevel gear 336, and a second bevel gear 337. The shaft 332 extends along the rotation center axis 160. The axial direction of the rotation center axis 160 corresponds to the radial direction of the swivel center axis 110 of the tool post 100. The shaft 332 is supported by a support portion 326 so as to be rotatable about the rotation center axis 160.

[0044] The rotation input key 331 is connected to one end of the shaft 332 in the axial direction of the rotation center shaft 160. The first bevel gear 336 is connected to the other end of the shaft 332 in the axial direction of the rotation center shaft 160. When the reversing holder 200 is attached to the attachment portion 41 of the tool post 100, the rotation input key 331 is coupled to the rotor of the built-in motor 66 built into the tool post 100. When rotation from the built-in motor 66 is input to the rotation input key 331, the shaft 332 rotates together with the first bevel gear 336 about the rotation center shaft 160.

[0045] The second bevel gear 337 meshes with the first bevel gear 336. The second bevel gear 337 is supported so as to be rotatable about the turning center axis 150. The second bevel gear 337 is integral with the turning part 321 and is rotatable about the turning center axis 150. The rotation of the first bevel gear 336 is transmitted to the second bevel gear 337, causing the turning part 321 to turn about the turning center axis 150.

[0046] The swivel unit 321 is capable of swiveling between a 0° position shown in Fig. 4 and a 180° position shown in Fig. 5. The orientation of the tool T (the orientation of the cutting unit 302) held by the reversing holder 200 is reversed between the 0° position shown in Fig. 4 and the 180° position shown in Fig. 5. At the 0° position shown in Fig. 4, the tool T faces in one direction along the axial direction of the swivel central axis 110 of the tool post 100, and at the 180° position shown in Fig. 5, the tool T faces in the other direction along the axial direction of the swivel central axis 110 of the tool post 100.

[0047] The reversing holder 200 includes a locking mechanism for fixing the swivel portion 321 at the 0° position shown in Fig. 4 and at the 180° position shown in Fig. 5. The locking mechanism will be described below.

[0048] 7 , the swivel portion 321 has a sleeve 322. The sleeve 322 is provided at a position spaced apart from the second bevel gear 337 radially outward from the swivel axis 150. The sleeve 322 has a cylindrical shape extending in the radial direction of the swivel axis 150. The sleeve 322 is provided so as to cover the shaft portion 301 of the tool T.

[0049] The reversing holder 200 has locking pieces 371 (371A, 371B). The locking piece 371 is provided on the support portion 326. The locking piece 371 is supported by the support portion 326 so as to be slidable in the axial direction of the pivot center shaft 110 of the tool post 100. The locking pieces 371A and 371B are provided at a distance from each other in the axial direction of the pivot center shaft 110 of the tool post 100. The shaft 332 is disposed between the locking pieces 371A and 371B in the axial direction of the pivot center shaft 110 of the tool post 100.

[0050] The reversal holder 200 further includes a spring member 366 and piston cylinders 361 (361A, 361B).

[0051] The spring member 366 is provided on the support portion 326. The spring member 366 is interposed between the locking pieces 371A and 371B in the axial direction of the pivot center shaft 110 of the tool post 100. The spring member 366 applies an elastic force to the locking piece 371 in the axial direction of the pivot center shaft 110, in directions that move the locking pieces 371A and 371B away from each other.

[0052] The piston cylinder 361 is provided on the support portion 326. The piston cylinder 361 is an air-operated type that is driven by supplying air. The piston cylinders 361A and 361B are provided apart from each other in the axial direction of the pivot axis 110 of the tool post 100. The locking piece 371A is provided between the spring member 366 and the piston cylinder 361A in the axial direction of the pivot axis 110. The locking piece 371B is provided between the spring member 366 and the piston cylinder 361B in the axial direction of the pivot axis 110.

[0053] The locking piece 371 has a claw portion 376. The claw portion 376 protrudes in the axial direction of the pivot center shaft 110 of the tool post 100 and has a claw shape that can lock onto an edge portion of the sleeve 322. The claw portion 376 of the locking piece 371A faces the edge portion of the sleeve 322 in the axial direction of the pivot center shaft 110 when the pivot part 321 is positioned at the 0° position. The claw portion 376 of the locking piece 371B faces the edge portion of the sleeve 322 in the axial direction of the pivot center shaft 110 when the pivot part 321 is positioned at the 180° position.

[0054] The elastic force of the spring member 366 causes the claw portion 376 of the locking piece 371 to slide in a direction approaching the edge of the sleeve 322. When the rotating part 321 is positioned at the 0° position, the claw portion 376 of the locking piece 371A engages with the edge of the sleeve 322, thereby locking the rotating part 321 at the 0° position. When the rotating part 321 is positioned at the 180° position, the claw portion 376 of the locking piece 371B engages with the edge of the sleeve 322, thereby locking the rotating part 321 at the 180° position.

[0055] When air is supplied to the piston cylinder 361, the piston cylinder 361A pushes the locking piece 371A toward the locking piece 371B while resisting the elastic force of the spring member 366, and at the same time, the piston cylinder 361B pushes the locking piece 371B toward the locking piece 371A while resisting the elastic force of the spring member 366. As a result, the locking pieces 371A and 371B slide toward each other in the axial direction of the pivot center shaft 110 of the tool post 100. When the swivel part 321 is positioned at the 0° position, the claw part 376 of the locking piece 371A moves away from the edge of the sleeve 322, and the lock on the swivel part 321 by the locking piece 371A is released; when the swivel part 321 is positioned at the 180° position, the claw part 376 of the locking piece 371B moves away from the edge of the sleeve 322, and the lock on the swivel part 321 by the locking piece 371B is released.

[0056] The inverting holder 200 further includes a proximity sensor 381 (381A, 381B) and a holder internal substrate 410. The proximity sensor 381 is provided on the support portion 326. The proximity sensor 381 is provided as a sensor for detecting the locked and unlocked states of the swivel portion 321. The holder internal substrate 410 is provided on the support portion 326. The holder internal substrate 410 is attached to the support portion 326. The proximity sensor 381 outputs a detection signal of the locking piece 371 to the holder internal substrate 410. The holder internal substrate 410 outputs a drive signal and power to the proximity sensor 381.

[0057] Proximity sensor 381A detects locking piece 371A and is provided opposite locking piece 371A in the axial direction of pivot center shaft 110. Proximity sensor 381B detects locking piece 371B and is provided opposite locking piece 371B in the axial direction of pivot center shaft 110. Proximity sensor 381A can detect locking and unlocking of pivot part 321 by locking piece 371A. Proximity sensor 381B can detect locking and unlocking of pivot part 321 by locking piece 371B.

[0058] 6 and 7 , the holder main body 310 has a base portion 320 and a block 341. The base portion 320 includes the above-described swivel portion 321 and support portion 326, and is capable of holding a tool T. The base portion 320 (support portion 326) has a bottom surface 320c. The bottom surface 320c is in surface contact with a first surface 510 of the mounting portion 41, which will be described later. The rotation input key 331 is provided at a position protruding from the bottom surface 320c.

[0059] The base portion 320 (support portion 326) further has a plurality of positioning pins 327. The positioning pins 327 have a pin shape that protrudes from the bottom surface 320c. The plurality of positioning pins 327 are provided at intervals from one another in the planar direction of the bottom surface 320c. When the bottom surface 320c is viewed from the front, the rotation input key 331 is provided at a position surrounded by the plurality of positioning pins 327.

[0060] The block 341 is detachably attached to the holder main body 310. The block 341 is fastened to the holder main body 310 (support portion 326) using bolts or the like. The block 341 is provided so as to protrude from the bottom surface 320c. The block 341 is provided between two positioning pins 327 that are adjacent in the axial direction of the pivot center shaft 150. When the bottom surface 320c is viewed from the front, the block 341 is provided alongside the rotation input key 331 in the axial direction of the pivot center shaft 110 of the tool post 100.

[0061] The reversing holder 200 further includes holder-side terminals 220 (220A, 220B). The holder-side terminals 220 make electrical contact with the tool post 100 when the reversing holder 200 is attached to the attachment portion 41.

[0062] The holder-side terminals 220 (220A, 220B) are provided in a block 341. The block 341 is provided with terminal holes 346 (346A, 346B). The terminal holes 346 are through-holes that pass through the block 341 in the axial direction of the rotation center shaft 160. The holder-side terminals 220 are disposed in the terminal holes 346. The holder-side terminals 220A and 220B are disposed in the terminal holes 346A and 346B, respectively.

[0063] An air hole 342 is provided in the base portion 320 (support portion 326). The air hole 342 opens at a position adjacent to the block 341 and extends toward the piston cylinders 361 (361A, 361B). Air is supplied from the mounting portion 41 to the reversing holder 200. The air is supplied to the piston cylinders 361 (361A, 361B) through the air hole 342 and piping (not shown).

[0064] [Wiring and piping structure in tool post] Fig. 8 is an enlarged cross-sectional view of a portion of the tool post in Fig. 3. Fig. 9 is a cross-sectional view schematically showing the rotary connector in Fig. 8. Fig. 10 is a cross-sectional view showing the tool post as seen in the direction of the arrows on line X-X in Fig. 3.

[0065] 3 and 8 to 10, the tool rest 100 further includes a plurality of turret terminals 140 (140A, 140B). The plurality of turret terminals 140 are provided on the plurality of mounting portions 41, respectively.

[0066] When the inverting holder 200 is attached to the attachment portion 41, the turret-side terminal 140 makes electrical contact with the inverting holder 200. When the inverting holder 200 is attached to the attachment portion 41, the turret-side terminal 140A is connected to the holder-side terminal 220A of the inverting holder 200 in Fig. 6, and the turret-side terminal 140B is connected to the holder-side terminal 220B of the inverting holder 200 in Fig. 6.

[0067] As shown in FIG. 9 , the rotary connector 81 has a movable part 82 and a fixed part 83. The movable part 82 is a movable part that can rotate together with the rotating body 21 around the central axis of rotation 110. The movable part 82 has a rotating shaft 86 and a drum 84. The rotating shaft 86 extends axially along the central axis of rotation 110. The drum 84 has a cylindrical shape centered on the central axis of rotation 110 and is fitted onto the outer periphery of the rotating shaft 86. A plurality of conductive bands 85 are provided on the outer periphery of the drum 84. The conductive bands 85 are made of metal. The conductive bands 85 have a ring shape that extends circumferentially around the central axis of rotation 110. The plurality of conductive bands 85 are provided at intervals from one another in the axial direction of the central axis of rotation 110.

[0068] The fixed portion 83 is fixed to the support body 61. The fixed portion 83 is detachably attached to the cylindrical portion 71. The fixed portion 83 is fastened to the cylindrical portion 71 using bolts or the like. The fixed portion 83 is a fixed component that does not rotate integrally with the rotating body 21. The fixed portion 83 is configured to form an electrical contact with the movable portion 82. More specifically, the fixed portion 83 has a housing 87 and a plurality of brushes 88. The housing 87 has a cylindrical shape centered on the central axis of rotation 110 and is provided on the outer periphery of the drum 84. The housing 87 supports the rotating shaft 86 so that it can rotate about the central axis of rotation 110. The plurality of brushes 88 are supported by the housing 87. The plurality of brushes 88 are provided at intervals from one another in the axial direction of the central axis of rotation 110. The brushes 88 are made of metal wires. The brush 88 extends from the housing 87 and contacts the conductive band 85 .

[0069] The tool rest 100 further includes a fixed-side wiring 130J and a movable-side wiring 130K. The fixed-side wiring 130J and the movable-side wiring 130K are routed inside the tool rest 100. The fixed-side wiring 130J and the movable-side wiring 130K are not exposed to the machining area of ​​the machine tool.

[0070] The fixed-side wiring 130J is connected to the fixed portion 83. The fixed-side wiring 130J is electrically connected to the plurality of brushes 88 in the fixed portion 83. The movable-side wiring 130K extends between the movable portion 82 and the plurality of turret-side terminals 140. The movable-side wiring 130K is electrically connected to the plurality of conductive bands 85 in the movable portion 82. The rotary connector 81 relays the fixed-side wiring 130J and the movable-side wiring 130K.

[0071] 3 and 8 , the fixed-side wiring 130J is passed from the outside of the tool post 100 through the base 12 and the intermediate housing 67, and extends in the axial direction of the pivot shaft 110. A wiring hole 63 is provided in the motor housing 62. The wiring hole 63 is a through-hole that penetrates the motor housing 62 in the axial direction of the pivot shaft 110. The fixed-side wiring 130J that has passed through the intermediate housing 67 passes through the wiring hole 63 and extends into a first internal space 191 between the flange portion 32 and the motor housing 62. The fixed-side wiring 130J that extends into the first internal space 191 is connected to the fixed portion 83 (plurality of brushes 88).

[0072] The rotary connector 81 is provided across both the first internal space 191 and the second internal space 192. One end (front end) of the rotary connector 81 in the axial direction of the central pivot shaft 110 is disposed in the second internal space 192. The rotary connector 81 is attachable to and detachable from the cylindrical portion 71 through the second internal space 192.

[0073] As shown in FIGS. 8 to 10 , the movable-side wiring 130K extending from the movable portion 82 (the plurality of conductive bands 85 ) extends into the second internal space 192 .

[0074] The tool post 100 further includes relay connectors 430 (430A, 430B). The relay connector 430 is disposed in the second internal space 192. The relay connector 430 is attached to the first flange surface 32a. The relay connectors 430A and 430B are spaced apart from each other in the circumferential direction of the pivot central shaft 110. The movable-side wiring 130K extending from the movable part 82 is connected to the relay connector 430. The relay connector 430 relays the movable-side wiring 130K in the second internal space 192.

[0075] A wiring hole 35 is provided in the flange portion 32. The wiring hole 35 is a through-hole that penetrates the flange portion 32 between the first flange surface 32a and the second flange surface 32b. The wiring hole 35 extends from the first flange surface 32a toward the second flange surface 32b while shifting outward in the radial direction of the pivot axis 110. A movable-side wiring 130K from the relay connector 430 is disposed in the wiring hole 35. The movable-side wiring 130K passes through the wiring hole 35 and extends into the first internal space 191.

[0076] The wiring hole 35 opens to the first flange surface 32a at an angular position between the relay connectors 430A and 430B in the circumferential direction of the pivot axis 110. The movable-side wiring 130K from the movable section 82 is first routed from the radially inner side to the radially outer side of the pivot axis 110. A portion of the movable-side wiring 130K extends in one direction along the circumferential direction of the pivot axis 110 and reaches the wiring hole 35 via the relay connector 430A. The remaining portion of the movable-side wiring 130K extends in the other direction along the circumferential direction of the pivot axis 110 and reaches the wiring hole 35 via the relay connector 430B.

[0077] The relay connector 430 has a first connector portion 431 and a second connector portion 432. The first connector portion 431 and the second connector portion 432 are detachably connected to each other. The first connector portion 431 is connected to the movable-side wiring 130K from the rotary connector 81 (movable portion 82). The second connector portion 432 is connected to the movable-side wiring 130K extending toward the turret-side terminal 140.

[0078] As shown in Figure 8, the tool rest 100 further has a plurality of turret internal boards 420. The plurality of turret internal boards 420 are arranged in the first internal space 191. The plurality of turret internal boards 420 are attached to the second flange surface 32b. The plurality of turret internal boards 420 are provided at intervals from one another in the circumferential direction of the central pivot shaft 110. The plurality of turret internal boards 420 are provided corresponding to the plurality of mounting portions 41 (the plurality of turret terminals 140). The movable side wiring 130K from the wiring hole 35 is connected to the plurality of turret internal boards 420.

[0079] It should be noted that a single turret internal board 420 that combines the functions of multiple turret internal boards 420 may be attached to the second flange surface 32b.

[0080] The movable side wiring 130K from each turret internal substrate 420 is connected to a turret side terminal 140 provided in each mounting portion 41.

[0081] Fig. 11 is another enlarged cross-sectional view showing a part of the tool rest in Fig. 3. The cross-sectional view in Fig. 11 shows the tool rest 100 in a different position from that in the cross-sectional view in Fig. 8.

[0082] 2, 3, and 11, an air groove 561 is provided between the cylindrical portion 71 and the flange portion 32 in the radial direction of the swivel center axis 110. The air groove 561 extends annularly in the circumferential direction of the swivel center axis 110. The air groove 561 is configured by combining a groove portion recessed from the outer circumferential surface of the cylindrical portion 71 and circumferentially around the swivel center axis 110 with a groove portion recessed from the inner circumferential surface of the flange portion 32 and circumferentially around the swivel center axis 110.

[0083] The tool post 100 further includes a seal member 571 and a seal member 572. Each of the seal members 571 and 572 extends annularly in the circumferential direction of the pivot shaft 110. Each of the seal members 571 and 572 is provided at the boundary between the cylindrical portion 71 and the flange portion 32 in the radial direction of the pivot shaft 110. The air groove 561 is disposed between the seal members 571 and 572 in the axial direction of the pivot shaft 110.

[0084] The flange portion 32 is further provided with a plurality of air holes 562. The plurality of air holes 562 extend radially from the air groove 561 toward the plurality of mounting portions 41, centered on the swivel central axis 110. The plurality of air holes 562 are provided at intervals from one another in the circumferential direction of the swivel central axis 110. Each air hole 562 extends from the radially inner side of the swivel central axis 110 to the radially outer side. Each air hole 562 is provided across the disk portion 32p and the tapered portion 32q in the radial direction of the swivel central axis 110. One end of each air hole 562 located radially inner of the swivel central axis 110 is connected to the air groove 561. The other end of each air hole 562 located radially outer of the swivel central axis 110 is connected to an air hole 551, which will be described later.

[0085] Each of the multiple mounting portions 41 is provided with multiple air holes 551. The air holes 551 open to a second surface 520 of the mounting portion 41, which will be described later. The air holes 551 extend in a direction perpendicular to the second surface 520. The air holes 551 extend between the air holes 562 and the second surface 520. The air holes 551 are provided across between a block 43 and a base portion 42 of the mounting portion 41, which will be described later.

[0086] When the inverted holder 200 is attached to the attachment portion 41, the air hole 551 communicates with the air hole 342 (see FIGS. 6 and 7 ) provided in the inverted holder 200. As shown in FIG. 12 (described later), the attachment portion 41 (block 43) is provided with a seal member 552. The seal member 552 has a ring shape. The seal member 552 is provided so as to surround the opening surface of the air hole 551 in the second surface 520. The seal member 552 seals the air flow path between the air hole 551 and the air hole 342.

[0087] An air pipe (not shown) through which air is supplied from the outside is connected to the rear end of the motor housing 62. Air holes (not shown) that guide air from the air pipe to the air groove 561 are provided in the motor housing 62 and the cylindrical portion 71. While flowing through the air groove 561, the air flows into the air hole 562 that is connected to the mounting portion 41 to which the reversing holder 200 is attached. The air flowing through the air hole 562 passes through the air hole 551 and the air hole 342 in the listed order, and is supplied to the piston cylinder 361 (361A, 361B).

[0088] To summarize the structure of the tool rest 100 in the first embodiment of the present invention, which has been mainly described in this section, the tool rest 100 in the present embodiment includes a support 61, a rotating body 21 which is aligned in the circumferential direction of a rotation center axis 110 as a predetermined axis and has a plurality of mounting portions 41 to which a reversal holder 200 as a tool holder can be attached, and which is supported by the support 61 so as to be rotatable about the rotation center axis 110, a movable portion 82 which rotates together with the rotating body 21 about the rotation center axis 110, and a support The rotary connector 81 is fixed to the body 61 and has a fixed part 83 that makes electrical contact with the movable part 82, and is arranged along the central axis of rotation 110; a turret side terminal 140 is provided on the mounting part 41 and serves as a terminal that makes electrical contact with the inversion holder 200; a fixed side wiring 130J that is routed inside the tool holder 100 and connected to the fixed part 83; and a movable side wiring 130K that is routed inside the tool holder 100 and extends between the movable part 82 and the turret side terminal 140.

[0089] With this configuration, an electrical path including the fixed-side wiring 130J, the rotary connector 81, the movable-side wiring 130K, and the turret-side terminal 140 can be configured inside the tool post 100. This allows communication with the reversing holder 200 to be performed via a wire, improving communication reliability. Furthermore, because power can be supplied to the reversing holder 200 via a wire, there is no need to install a battery in the reversing holder 200, allowing the reversing holder 200 to be made smaller.

[0090] As a result, it is possible to realize a tool rest 100 that improves the reliability of communication in the electrical use of the inverting holder 200 and enables the inverting holder 200 to be made smaller.

[0091] The rotating body 21 also has a flange portion 32 that is provided between the rotary connector 81 and the multiple mounting portions 41 in the radial direction of the rotation center axis 110, and a cover portion 36 that is detachably attached to the flange portion 32 and that, together with the flange portion 32, defines a second internal space 192 as an internal space in which the rotary connector 81 is arranged.

[0092] According to this configuration, an operator can access the rotary connector 81 by removing the cover portion 36 from the flange portion 32. This improves the workability during maintenance of the rotary connector 81.

[0093] Additionally, the movable-side wiring 130K from the movable portion 82 extends into the second internal space 192. The flange portion 32 has a first flange surface 32a that is disposed in the second internal space 192. The tool post 100 further includes a relay connector 430 that is attached to the first flange surface 32a and relays the movable-side wiring 130K in the second internal space 192.

[0094] With this configuration, in the relay connector 430, the movable-side wiring 130K extending from the rotary connector 81 (movable portion 82) can be separated from the movable-side wiring 130K extending toward the turret-side terminal 140. This further improves the workability during maintenance of the rotary connector 81.

[0095] The flange portion 32 further has a second flange surface 32b disposed on the rear side of the first flange surface 32a. The flange portion 32 is provided with a wiring hole 35, which is a through hole extending between the first flange surface 32a and the second flange surface 32b and through which the movable-side wiring 130K from the relay connector 430 is disposed. The tool rest 100 further includes a turret internal circuit board 420, which is attached to the second flange surface 32b and to which the movable-side wiring 130K from the wiring hole 35 is connected.

[0096] With this configuration, by using the second flange surface 32b of the flange portion 32 as the mounting surface for the substrate, the turret internal substrate 420 can be arranged on the path of the movable side wiring 130K between the relay connector 430 and the turret side terminal 140.

[0097] The support body 61 also has a cylindrical portion 71 having a cylindrical shape centered on the central axis of rotation 110. The rotary connector 81 is disposed inside the cylindrical portion 71. The rotating body 21 is fitted onto the outer periphery of the cylindrical portion 71 and rotates around the central axis of rotation 110 while sliding relative to the cylindrical portion 71. The rotating body 21 further has a flange portion 32 provided between the cylindrical portion 71 and the multiple mounting portions 41 in the radial direction of the central axis of rotation 110. An air groove 561 is provided between the cylindrical portion 71 and the flange portion 32 in the radial direction of the central axis of rotation 110, extending in the circumferential direction of the central axis of rotation 110 and serving as a fluid groove through which air is supplied as a fluid. The flange portion 32 is provided with a plurality of air holes 562 extending radially from the central axis of rotation 110 from the air groove 561 toward the multiple mounting portions 41, and serving as a fluid hole through which air flows from the air groove 561.

[0098] According to this configuration, an electrical path is formed by rotary connector 81 on the radially inner side of turning center shaft 110, sandwiching cylindrical portion 71 therebetween, and an air flow path is formed by air groove 561 and multiple air holes 562 on the radially outer side of turning center shaft 110, sandwiching cylindrical portion 71 therebetween. This makes it possible to provide an electrical path and air flow path toward mounting portion 41 in a compact manner in the axial direction of turning center shaft 110.

[0099] In this embodiment, the fluid flowing through the fluid groove and the plurality of fluid holes of the present invention is air supplied to the piston cylinder 361, but this is not limiting. The fluid of the present invention may be, for example, oil for operating a clamping mechanism for a tool mounted on the tool holder, air for detecting the clamping of the tool using air pressure, air for confirming seating of the tool holder on the mounting portion (first surface 510 described below), or coolant discharged toward the cutting edge of the tool. Multiple sets of the fluid groove and the plurality of fluid holes of the present invention may be provided in pairs spaced apart from each other in the axial direction of a predetermined axis, thereby forming multiple fluid flow paths.

[0100] [Structure of Mounting Portion (Turret Side Terminal) in Tool Post] Fig. 12 is an enlarged perspective view of the tool post in the area surrounded by the two-dot chain line XII in Fig. 1. Fig. 13 is a cross-sectional view of the tool post as viewed in the direction of the arrows on the line XIII-XIII in Fig. 12.

[0101] 13 and 14 to 16, the turret-side terminals 140A and / or the holder-side terminals 220A are shown as representatives, but the turret-side terminals 140A and 220A and the turret-side terminals 140B and 220B have the same structure but with different numbers of pins. The number of pins of the turret-side terminals 140A and 220A is greater than the number of pins of the turret-side terminals 140B and 220B.

[0102] With reference to FIGS. 2, 8, 12 and 13, the mounting portion 41 has a first surface 510 and a second surface 520.

[0103] Each of the first surface 510 and the second surface 520 is a plane perpendicular to the radial direction of the central axis of rotation 110. Each of the first surface 510 and the second surface 520 faces radially outward from the central axis of rotation 110. When viewed in the axial direction of the central axis of rotation 110, the first surface 510 extends along the sides of a regular polygon (regular dodecagon) centered on the central axis of rotation 110. The second surface 520 forms a step with respect to the first surface 510. The second surface 520 is disposed radially inward from the central axis of rotation 110.

[0104] Each of the tool holders 210, the first tool holder 210S and the second tool holder 210T, is mounted on the first surface 510. A bottom surface 320c (see FIGS. 6 and 7) of the reversing holder 200 serving as the second tool holder 210T is in surface contact with the first surface 510. The mounting portion 41 is provided with a plurality of pin insertion holes 49. The pin insertion holes 49 extend in a direction perpendicular to the first surface 510 and open to the first surface 510. When the reversing holder 200 is mounted on the mounting portion 41, the plurality of positioning pins 327 shown in FIGS. 6 and 7 are inserted into the plurality of pin insertion holes 49, respectively, thereby positioning the reversing holder 200 with respect to the mounting portion 41.

[0105] The mounting portion 41 is further provided with a recess 530. The recess 530 has a recessed shape recessed from the first surface 510. The direction perpendicular to the first surface 510 (the radial direction of the central axis of rotation 110) corresponds to the depth direction of the recess 530. The second surface 520 is disposed at the bottom of the recess 530. The second surface 520 corresponds to the bottom surface of the recess 530. The recess 530 is open facing in one direction along the second surface 520. The recess 530 is open facing in one direction along the axial direction of the central axis of rotation 110.

[0106] The second surface 520 (bottom surface of the recess 530) is surrounded by a wall portion formed by the mounting portion 41 in the other direction along the axial direction of the pivot center axis 110, in one direction along the tangential direction of the arc centered on the pivot center axis 110, and in the other direction along the tangential direction of the arc centered on the pivot center axis 110.

[0107] The turret-side terminals 140 are arranged on the second surface 520. The turret-side terminals 140 are provided so as to protrude from the second surface 520. The mounting portion 41 is further provided with terminal holes 44 (44A, 44B). The terminal holes 44 open to the second surface 520. The terminal holes 44 extend in a direction perpendicular to the second surface 520 and communicate with the first internal space 191. The turret-side terminals 140 are arranged in the terminal holes 44. The turret-side terminals 140A and 140B are arranged in the terminal holes 44A and 44B, respectively.

[0108] The mounting portion 41 has a base portion 42 and a block 43. The base portion 42 has a first surface 510. The flange portion 32, the housing portion 34, and the base portion 42 are integrally molded from metal. The tool holder 210 is mounted to the base portion 42. The block 43 has a second surface 520. The block 43 is a metal block that is separate from the base portion 42. The block 43 is detachably attached to the base portion 42. The block 43 is fastened to the base portion 42 using bolts or the like.

[0109] The terminal holes 44 are provided across the block 43 and the base portion 42. The turret side terminals 140 are disposed in the terminal holes 44 provided in the block 43. The movable side wiring 130K from the turret internal substrate 420 passes through the terminal holes 44 provided in the base portion 42 and the block 43 and extends to the turret side terminals 140.

[0110] The base portion 42 is provided with a block placement groove 540. The block placement groove 540 has a concave shape recessed from the first surface 510. The block placement groove 540 is open facing one direction along the axial direction of the pivot axis 110. As shown in FIG. 8 , the base portion 42 has a bottom surface 525. The bottom surface 525 is located at the bottom of the block placement groove 540. The depth Hb of the block placement groove 540 from the first surface 510 (the length between the first surface 510 and the bottom surface 525 in the radial direction of the pivot axis 110) is greater than the depth Ha of the recess 530 from the first surface 510 (the length between the first surface 510 and the second surface 520 in the radial direction of the pivot axis 110) (Hb>Ha).

[0111] The block 43 is disposed in the block placement groove 540. The block 43 has a rectangular parallelepiped shape with the second surface 520 as the top surface. The second surface 520 is disposed between the first surface 510 and a bottom surface 525 of the block placement groove 540. The second surface 520 is located closer to the first surface 510 than the bottom surface 525 in the radial direction of the turning center axis 110. The depth Ha of the recess 530 may be in a range from 1 / 20 to 1 / 3 times the depth Hb of the block placement groove 540 (1 / 20 × Hb ≦ Ha ≦ 1 / 3 × Hb). The depth Ha of the recess 530 may be in a range from 1 / 15 to 1 / 5 times the depth Hb of the block placement groove 540 (1 / 15 × Hb ≦ Ha ≦ 1 / 5 × Hb). The depth Ha of the recess 530 may be in the range of 1 / 100 to 1 / 10 of the length Hc between the central axis of rotation 110 and the first surface 510 in the radial direction of the central axis of rotation 110 (1 / 100 × Hc ≦ Ha ≦ 1 / 10 × Hc). The depth Ha of the recess 530 may be in the range of 1 / 50 to 1 / 20 of the length Hc between the central axis of rotation 110 and the first surface 510 in the radial direction of the central axis of rotation 110 (1 / 50 × Hc ≦ Ha ≦ 1 / 20 × Hc). The depth Ha of the recess 530 may be in the range of 5 mm to 50 mm (5 mm ≦ Ha ≦ 50 mm) or in the range of 10 mm to 30 mm (10 mm ≦ Ha ≦ 30 mm).

[0112] When the block 43 is removed from the base portion 42, the block placement groove 540 may be used as a space to prevent interference between the tool protruding from the first tool holder 210S and the base portion 42.

[0113] The tool rest 100 further includes a seal member 45. The seal member 45 has a ring shape. A seal groove 570 is further provided in the mounting portion 41 (block 43). The seal groove 570 is recessed from the second surface 520 and has a groove shape that runs around the opening edge of the terminal hole 44. The seal member 45 is disposed in the seal groove 570. The seal member 45 runs around the outer peripheral surface of the turret-side terminal 140. The seal member 45 seals a space where electrical contacts between the turret-side terminal 140 and the holder-side terminal 220 are disposed.

[0114] 1 to 3, either the first tool holder 210S or the second tool holder 210T can be selectively attached to each attachment portion 41. In the drawings, the second tool holder 210T (inverted holder 200) is attached to one attachment portion 41, and the first tool holders 210S are attached to the remaining eleven attachment portions 41.

[0115] The tool rest 100 further includes a lid 91. The lid 91 is attached to the mounting portion 41 to which the first tool holder 210S is attached. The lid 91 is not attached to the mounting portion 41 to which the second tool holder 210T (inverted holder 200) is attached.

[0116] Fig. 14 is a cross-sectional view showing the state in which the second tool holder (inverted holder) is mounted on the mounting portion, and Fig. 15 is an enlarged cross-sectional view showing the area surrounded by the two-dot chain line XV in Fig. 14 .

[0117] 14 and 15, in the mounting portion 41 to which the second tool holder 210T (inverted holder 200) is mounted, the turret side terminal 140 is exposed to the second surface 520 because the cover 91 is not attached.

[0118] When the inverted holder 200 is attached to the attachment portion 41, the block 341 is fitted into the recess 530. The bottom surface 320c of the base portion 320 is in surface contact with the first surface 510. The block 341 is in surface contact with the second surface 520. The block 341 abuts against the seal member 45.

[0119] The turret-side terminal 140 has a resin portion 47 and a plurality of pins 46. The resin portion 47 has a top surface 47a. The top surface 47a faces the holder-side terminal 220 with a gap therebetween. The resin portion 47 has a plurality of pin holes 48. The plurality of pin holes 48 are spaced apart from one another and open to the top surface 47a. The plurality of pins 46 are respectively arranged in the plurality of pin holes 48. The plurality of pins 46 are held together by the resin portion 47. The pins 46 have a pin shape that extends in one direction. The pins 46 are made of metal.

[0120] The turret-side terminals 140 are provided so as to protrude from the second surface 520. The turret-side terminals 140 are provided so as not to protrude from the first surface 510. The top surface 47a is located between the first surface 510 and the second surface 520 in the depth direction of the recess 530.

[0121] The holder-side terminal 220 has a resin part 221 and a plurality of pin components 222. The resin part 221 corresponds to the resin part 47 of the turret-side terminal 140, and the plurality of pin components 222 correspond to the plurality of pins 46 of the turret-side terminal 140. The plurality of pin components 222 are held together by the resin part 221. The plurality of pin components 222 come into contact with the plurality of pins 46, respectively, thereby forming electrical contacts between the holder-side terminal 220 and the turret-side terminal 140.

[0122] The structures of the turret-side terminal 140 and the holder-side terminal 220 will be described in more detail. The pin 46 has a tip portion 46a. The tip portion 46a is located at a position recessed in the pin hole 48 relative to the opening of the pin hole 48 in the top surface 47a. The size of the step between the top surface 47a and the tip portion 46a is preferably 0.1 mm or more, and more preferably 0.2 mm or more.

[0123] The pin component 222 has a support portion 225, a contact 223, and a spring member 224. The resin portion 221 covers the support portion 225. The contact 223 has a pin shape extending in a predetermined direction. The contact 223 is made of metal. The contact 223 is supported by the support portion 225 so as to be slidable along the predetermined direction. One end (tip) of the contact 223 protrudes from the support portion 225. The tip of the contact 223 has a curved surface and is in contact with the pin 46 (tip 46a) of the turret-side terminal 140. The other end of the contact 223 is connected to a wiring 135. The contact 223 is electrically connected to the holder internal substrate 410 (see FIG. 7 ) by the wiring 135.

[0124] The spring member 224 is provided on the support portion 225. The spring member 224 is parallel to a predetermined direction and applies an elastic force in a direction pressing the contactor 223 toward the pin 46. When the inverted holder 200 is attached to the attachment portion 41, the contactor 223 is pressed into the support portion 225 by the pin 46 against the elastic force of the spring member 224. This configuration ensures sufficient contact pressure between the pin part 222 and the pin 46, thereby improving the reliability of the electrical contact between the holder-side terminal 220 and the turret-side terminal 140.

[0125] 16 is a cross-sectional view showing the first tool holder 210S mounted on the mounting portion 41. The mounting portion 41 has a cover 91 attached thereto, so that the turret-side terminals 140 are not exposed on the second surface 520.

[0126] The lid 91 is detachably attached to the second surface 520. The lid 91 is disposed in the recess 530. The lid 91 is detachably attached to the block 43. The lid 91 is fastened to the block 43 using bolts or the like. The lid 91 is provided so as to cover the turret-side terminals 140 protruding from the second surface 520. The lid 91 abuts against the seal member 45. The lid 91 is provided so as to close the air hole 551 (see FIGS. 11 and 12 ) opening in the second surface 520. The lid 91 abuts against the seal member 552 (see FIGS. 11 and 12 ).

[0127] The depth direction of the recess 530 corresponds to the thickness direction of the lid 91, and the lid 91 is made of a plate material having a rectangular shape corresponding to the second surface 520 when viewed in the depth direction of the recess 530. The lid 91 has a thickness smaller than the step formed by the first surface 510 and the second surface 520. The lid 91 has a top surface 91a. The top surface 91a is disposed between the first surface 510 and the second surface 520 in the depth direction of the recess 530.

[0128] The first tool holder 210S is attached to the first surface 510. A gap is provided between the first tool holder 210S and the lid 91.

[0129] To summarize the structure of the tool rest 100 according to the first embodiment of the present invention, which has been mainly described in this section, the tool rest 100 according to the present embodiment has a first surface 510 and a second surface 520 that forms a step with the first surface 510, and is provided with a mounting portion 41 on which an inverted holder 200 serving as a tool holder can be mounted on the first surface 510. The mounting portion 41 is provided with a recess 530 that is recessed from the first surface 510, opens in one direction along the second surface 520, and has the second surface 520 located at its bottom. The tool rest 100 further includes a turret-side terminal 140 that is located on the second surface 520 and serves as a terminal that makes electrical contact with the inverted holder 200.

[0130] In this configuration, because the recess 530 is recessed from the first surface 510, chips tend to accumulate on the second surface 520 located at the bottom of the recess 530. In this case, because the recess 530 is open facing one direction along the second surface 520, an operator can easily remove chips that have accumulated on the second surface 520 and adhere to the turret-side terminals 140 through the open position. This prevents the tool holder 210 from being attached to the attachment portion 41 with chips still adhering to the turret-side terminals 140.

[0131] The tool post 100 has a plurality of mounting portions 41 arranged in the circumferential direction of the central pivot axis 110 as a predetermined axis, and is provided with a rotating body 21 that can rotate around the central pivot axis 110. The one direction in which the recess 530 is open corresponds to the axial direction of the central pivot axis 110.

[0132] With this configuration, in the turret-type tool rest 100, the operator can easily remove chips that accumulate on the second surface 520 through the open position of the recess 530 that is open facing the axial direction of the pivot center axis 110.

[0133] The tool rest 100 further includes a lid 91 that is detachably attached to the second surface 520 and placed in the recess 530. The lid 91 has a thickness that is smaller than the step formed by the first surface 510 and the second surface 520.

[0134] With this configuration, when the first tool holder 210S, which cannot make electrical contact with the tool post 100, is attached to the mounting portion 41, attaching the lid 91 to the second surface 520 can prevent foreign matter such as chips or coolant from adhering to the turret side terminal 140.

[0135] The mounting portion 41 includes a base portion 42 having a first surface 510 and on which the inverting holder 200 is mounted, and a block 43 having a second surface 520 and removably attached to the base portion 42. The turret-side terminal 140 is provided on the block 43.

[0136] According to this configuration, by attaching the block 43 to the base portion 42, the specifications can be changed from a tool post that can only accommodate the first tool holder 210S to a tool post 100 that can selectively accommodate either the first tool holder 210S or the second tool holder 210T.

[0137] The turret-side terminal 140 also includes a resin portion 47 having a plurality of pin holes 48 formed therein, and a plurality of metal pins 46 that are respectively disposed in the plurality of pin holes 48 and held together by the resin portion 47. The pins 46 have tip portions 46a. The resin portion 47 has a top surface 47a through which the plurality of pin holes 48 open. The tip portions 46a are disposed at positions within the pin holes 48 that are recessed from the opening surfaces of the pin holes 48 on the top surface 47a.

[0138] With this configuration, unintended conduction between the tip 46 a of the pin 46 and a conductive material such as chips present in the space above the top surface 47 a of the resin part 47 can be suppressed.

[0139] The machine tool in this embodiment includes a tool rest 100. With this configuration, a machine tool can be realized that can easily remove chips adhering to the turret side terminals 140 in the tool rest 100.

[0140] [Electrical Structure of Tool Holder (Inverted Holder)] FIG. 17 is a block diagram showing the electrical structure of the inverted holder in the first embodiment of the present invention.

[0141] 17 , an inverted holder 200 serving as a tool holder in this embodiment is mounted on a tool post 100 serving as a machine tool body and is capable of holding a tool. The inverted holder 200 includes: proximity sensors 381 (381A, 381B) serving as sensors and / or actuators; a holder internal circuit board 410 serving as a board on which a first electronic circuit 721 serving as an electronic circuit capable of converting electrical signals from the proximity sensors 381 (381A, 381B) into digital signals that can be serially transmitted; a holder-side terminal 220A that makes electrical contact with the tool post 100 and serves as a serial terminal for serially transmitting the digital signals; and a holder-side terminal 220B that makes electrical contact with the tool post 100 and serves as a power supply terminal for supplying power to the proximity sensors 381 (381A, 381B).

[0142] More specifically, four of the pins 222 of the holder-side terminal 220A in FIG. 14 are responsible for transmitting and receiving signals to and from the proximity sensor 381 (381A, 381B). The signal transmitted to the proximity sensor 381 may include a signal commanding the operation of the proximity sensor 381. The signal received from the proximity sensor 381 may include a detection signal for locking and a detection signal for unlocking the swivel portion 321. The remaining pins 222 of the holder-side terminal 220A may be used for grounding the proximity sensor 381.

[0143] Two of the pins 222 of the holder-side terminal 220B are responsible for supplying power to the proximity sensor 381 (381A, 381B).

[0144] A first electronic circuit 721 is mounted on the holder internal substrate 410. The first electronic circuit 721 functions as an analog-to-digital (A / D) conversion circuit for converting analog electrical signals output from the proximity sensors 381 (381A, 381B) into digital signals that can be serially transmitted. The first electronic circuit 721 may also function as a circuit for converting digital electrical signals output from the proximity sensors 381 into digital signals that can be serially transmitted.

[0145] The tool post 100 includes a turret-side terminal 140A for serially transmitting digital signals and a turret-side terminal 140B for supplying power to the proximity sensors 381 (381A, 381B). When the reversing holder 200 is attached to the tool post 100, the turret-side terminal 140A and the holder-side terminal 220A are connected to each other, thereby forming an electrical contact for serially transmitting digital signals between the tool post 100 and the reversing holder 200. The turret-side terminal 140B and the holder-side terminal 220B are connected to each other, thereby forming an electrical contact for transmitting power from the tool post 100 to the reversing holder 200.

[0146] With this configuration, the first electronic circuit 721 on the holder internal substrate 410 converts the electrical signal from the proximity sensor 381 (381A, 381B) into a digital signal that can be transmitted serially, and the holder-side terminal 220A makes electrical contact with the tool post 100, thereby serially transmitting the digital signal from the holder internal substrate 410 to the tool post 100. This ensures a sufficient amount of communication that can be carried out simultaneously between the reversing holder 200 and the tool post 100. Furthermore, the holder-side terminal 220B makes electrical contact with the tool post 100, making it possible to supply power to the proximity sensor 381 via a wired connection. This eliminates the need to install a battery in the reversing holder 200, allowing the reversing holder 200 to be made more compact.

[0147] As a result, the inverting holder 200 can be made smaller while ensuring a sufficient amount of communication power when using electricity in the inverting holder 200.

[0148] Note that inverting holder 200 may further include a temperature sensor 911 and an acceleration sensor 912, which will be described in embodiment 3. Substrate 410 within holder 410 may further include a second electronic circuit 722 capable of converting an electrical signal from temperature sensor 911 into a digital signal that can be serially transmitted, and a third electronic circuit 723 capable of converting an electrical signal from acceleration sensor 912 into a digital signal that can be serially transmitted.

[0149] 6, inverting holder 200 further includes a base portion 320 capable of holding a tool, and a block 341 detachably attached to base portion 320 and provided with holder-side terminals 220A and 220B.

[0150] With this configuration, the block 341 can be removed from the base portion 320, which improves workability when cleaning or maintaining the holder-side terminals 220A and 220B.

[0151] Fig. 18 is a block diagram showing a modified example of the electrical structure of the inverting holder in Fig. 17. Referring to Fig. 18, an inverting holder 200D in this modified example further includes an actuator 711.

[0152] Actuator 711 is a motor for rotating swivel unit 321, replacing built-in motor 66 in Fig. 3, and is built into reversing holder 200D. Reversing holder 200D does not have a mechanism for transmitting rotation from built-in motor 66 to swivel unit 321 (rotation input key 331, shaft 332, first bevel gear 336, second bevel gear 337, etc. in Fig. 7), but instead has a mechanism for transmitting rotation output from actuator 711 to swivel unit 321.

[0153] A fourth electronic circuit 724 is further mounted on the holder internal substrate 410. The fourth electronic circuit 724 functions as an analog-to-digital (A / D) conversion circuit for converting an analog electrical signal output from the actuator 711 into a digital signal that can be serially transmitted. The fourth electronic circuit 724 may also function as a circuit for converting a digital electrical signal output from the actuator 711 into a digital signal that can be serially transmitted.

[0154] The holder-side terminal 220A forms an electrical contact with the tool post 100 and is provided as a serial terminal for serially transmitting a digital signal from the holder internal circuit board 410. The holder-side terminal 220B is provided as a power supply terminal for supplying power to the proximity sensor 381 (381A, 381B) and the actuator 711.

[0155] The signals sent to the actuator 711 may include signals that command the operation of the actuator 711. The signals received from the actuator 711 may include feedback signals from the motor's encoder.

[0156] In addition, in the case where the piston cylinder 361 in FIG. 7 is provided with an electromagnetic valve for controlling the flow of air supplied to the piston cylinder 361, the actuator 711 may be the piston cylinder 361 equipped with the electromagnetic valve.

[0157] The machine tool body in the present invention is a component of a machine tool that processes a workpiece. The machine tool body is not limited to a tool post and may be, for example, a tool spindle or a table. The tool held by the tool holder in the present invention is not limited to a tool used to process a workpiece and may be, for example, a measuring instrument (touch probe) used to measure the shape of the workpiece.

[0158] (Embodiment 2) [Electrical Structure of Jig] Fig. 19 is a front view showing a machine tool using a jig in embodiment 2 of the present invention. Fig. 20 is a block diagram showing the electrical structure of the jig in Fig. 19.

[0159] In this embodiment, the electrical structure of inverted holder 200 in embodiment 1 will be described as being expanded to a jig 800 for holding a workpiece. Therefore, the electrical structure of jig 800 in this embodiment is basically the same as the electrical structure of inverted holder 200 in embodiment 1. Hereinafter, the description of the overlapping structures will not be repeated.

[0160] 19 and 20, a jig 800 in this embodiment is attached to a tool rest 100 serving as a turret-type tool rest, and is capable of holding a workpiece W.

[0161] The machine tool 760 is a multi-tasking machine having a tool rest 100, a workpiece spindle 860, and a tool spindle (not shown). A workpiece W is held on the workpiece spindle 860. The workpiece W is rotated around a rotation center axis 880. The workpiece W is an elongated body whose axial direction of the rotation center axis 880 corresponds to its longitudinal direction. A tool spindle (not shown) is disposed opposite the workpiece spindle 860 in the axial direction of the rotation center axis 880. The workpiece W is machined by bringing a tool held by the tool spindle into contact with the workpiece W while rotating.

[0162] A jig 800 is attached to the tool rest 100. The jig 800 holds the workpiece W at a position spaced apart from the workpiece spindle 860 in the axial direction of the rotation center axis 880. The jig 800 functions as a vibration prevention device that prevents the workpiece W from vibrating.

[0163] The jig 800 has a pair of arms 810 that hold the workpiece W using rollers, an actuator 820 that operates hydraulically and rotates the pair of arms 810 to match the diameter of the workpiece W, and a proximity sensor 830 that detects the rotation position of the pair of arms 810.

[0164] The jig 800 has a substrate 840 corresponding to the holder internal substrate 410 in Fig. 17, a serial terminal 850A corresponding to the holder side terminal 220A in Fig. 17, and a power supply terminal 850B corresponding to the holder side terminal 220B in Fig. 17. A first electronic circuit 841 and a second electronic circuit 842 are mounted on the substrate 840. The first electronic circuit 841 functions as an analog-to-digital (A / D) conversion circuit for converting an analog electrical signal output from the actuator 820 into a digital signal that can be serially transmitted. The second electronic circuit 842 functions as an analog-to-digital (A / D) conversion circuit for converting an analog electrical signal output from the proximity sensor 830 into a digital signal that can be serially transmitted.

[0165] To summarize the structure of jig 800 according to the second embodiment of the present invention as described above, jig 800 according to the present embodiment is attached to turret-type tool post 100 and is capable of holding a workpiece. Jig 800 includes: proximity sensor 830 and actuator 820 as sensors and / or actuators; a substrate 840 on which are mounted first electronic circuit 841 and second electronic circuit 842 capable of converting electrical signals from proximity sensor 830 and actuator 820 into digital signals that can be serially transmitted; a serial terminal 850A that makes electrical contact with tool post 100 and transmits the digital signals serially; and a power supply terminal 850B that makes electrical contact with tool post 100 and supplies power to proximity sensor 830 and actuator 820.

[0166] The tool post 100 includes a turret terminal 140A for serially transmitting digital signals, and a turret terminal 140B for supplying power to the actuator 820 and the proximity sensor 830. When the jig 800 is attached to the tool post 100, the turret terminal 140A and the serial terminal 850A are connected to each other, thereby forming an electrical contact for serially transmitting digital signals between the tool post 100 and the jig 800. The turret terminal 140B and the power supply terminal 850B are connected to each other, thereby forming an electrical contact for transmitting power from the tool post 100 to the jig 800.

[0167] With this configuration, for the same reasons as in the inverted holder 200 described above, the jig 800 can be made smaller while ensuring a sufficient amount of communication when using electricity in the jig 800.

[0168] (Embodiment 3) [Screen display of signals from tool holder] Figure 21 is a block diagram showing a machine tool 900 according to an embodiment of the present invention. Machine tool 900 according to the present embodiment includes tool rest 100 and inverted holder 200 as described in embodiment 1. Hereinafter, the description of the structures of tool rest 100 and inverted holder 200 according to embodiment 1 will not be repeated.

[0169] Referring to FIG. 21, machine tool 900 has, as sensors S, proximity sensor 381, a temperature sensor 911, and an acceleration sensor 912.

[0170] The proximity sensor 381, the temperature sensor 911, and the acceleration sensor 912 are provided on the inverting holder 200. The temperature sensor 911 detects the temperature of the inverting holder 200, which rises as the workpiece is machined by the tool T. The acceleration sensor 912 detects vibrations of the inverting holder 200, which occur as the workpiece is machined by the tool T.

[0171] The type of sensor S provided in the inverting holder 200 is not particularly limited, and for example, a strain sensor for detecting the cutting force generated when the workpiece is machined by the tool T may be provided in the inverting holder 200.

[0172] For simplicity, it is assumed that the tool post 100 has four mounting parts 41 referred to as station 1, station 2, station 3, and station 4. The inverting holders 200 mounted to station 1, station 2, station 3, and station 4 are referred to as inverting holder 200-1, inverting holder 200-2, inverting holder 200-3, and inverting holder 200-4, respectively.

[0173] The sub-numbers "-1," "-2," "-3," and "-4" assigned to the proximity sensor 381, the temperature sensor 911, and the acceleration sensor 912 correspond to the sub-numbers of the inverting holder 200-1, the inverting holder 200-2, the inverting holder 200-3, and the inverting holder 200-4, respectively. For example, the temperature sensor 911-3 is the temperature sensor 911 provided in the inverting holder 200-3.

[0174] Machine tool 900 further has a control panel 920 and an operation panel 930. Control panel 920 is a device that mounts electric control devices and electric devices for controlling machine tool 900. Operation panel 930 has an operation unit 931 that accepts various operations on machine tool 900, and a display unit 932 that displays various information related to machining. Operation unit 931 is composed of various buttons that can be pressed, numeric keys that can input numbers, dials, etc. Display unit 932 is composed of a touch panel display that can be operated by an operator, and performs some of the functions of the operation unit.

[0175] The substrate in the holder 410 receives signals from the proximity sensors 381 (381-1, 2, 3, 4), the temperature sensors 911 (941-1, 2, 3, 4), and the acceleration sensors 912 (912-1, 2, 3, 4). The substrate in the holder 410 receives a command to transmit a sensor signal from the control panel 920, and in accordance with the command, selectively transmits some of the signals from the proximity sensors 381 (381-1, 2, 3, 4), the temperature sensors 911 (911-1, 2, 3, 4), and the acceleration sensors 912 (912-1, 2, 3, 4) to the control panel 920.

[0176] The turret internal circuit board 420 controls the power supply to the inverting holder 200. The turret internal circuit board 420 may be equipped with a safety circuit for protecting the power supply system in the event that poor contact occurs between the movable part 82 and the fixed part 83 of the rotary connector 81 in Fig. 8 or poor contact occurs between the turret side terminal 140 and the holder side terminal 220 in Fig. 14 .

[0177] Fig. 22 is a block diagram showing a control system for screen display on the display unit in Fig. 21. Fig. 23 is a diagram showing a first application screen on the display unit in Fig. 21. Figs. 24 to 26 are diagrams showing second application screens on the display unit in Fig. 21.

[0178] 21 to 26 , machine tool 900 has a control device 950. Each component of control device 950 is implemented by hardware including a computing unit such as a CPU (Central Processing Unit) and various computer processors, a storage device such as a memory or storage, and wired or wireless communication lines connecting them, as well as software stored in the storage device and supplying processing instructions to the computing unit. The computer program constituting the software may be implemented by a device driver, an operating system, various application programs located at higher levels thereof, or a library providing common functions to these programs. The computer program may be recorded on a computer-readable storage medium or a non-transitory computer-readable storage medium. The computer program may be included in a computer program product.

[0179] Each component of the control device 950 described below represents a functional block. Typically, each component of the control device 950 is provided on a control panel 920 and an operation panel 930.

[0180] The control device 950 controls the machine tool 900. The control device 950 has a communication unit 960, a signal monitoring unit 966, a display control unit 970, a storage unit 980, and an operation receiving unit 990.

[0181] The communication unit 960 processes communication of signals from the proximity sensor 381, the temperature sensor 911, and the acceleration sensor 912. The signal monitoring unit 966 monitors the signals from the proximity sensor 381, the temperature sensor 911, and the acceleration sensor 912.

[0182] The display control unit 970 controls image display on the display unit 932. The storage unit 980 stores signals from the proximity sensor 381, the temperature sensor 911, and the acceleration sensor 912. The operation accepting unit 990 accepts operations by the operator via the display unit 932, which is a touch panel display. The operation accepting unit 990 outputs a signal corresponding to the operator's operation on the display unit 932 to the communication unit 960 and / or the display control unit 970.

[0183] The proximity sensors 381 (381-1, 2, 3, 4) in the reversing holder 200 (200-1, 2, 3, 4), the temperature sensors 911 (911-1, 2, 3, 4), and the acceleration sensors 912 (912-1, 2, 3, 4) constitute a first sensor group Sa.

[0184] The communication unit 960 has a transmission command unit 962 and a signal acquisition unit 961. The worker performs an operation to select sensors S that constitute the second sensor group Sb from the sensors S that constitute the first sensor group Sa via the display unit 932, which is a touch panel display. The sensors S that constitute the second sensor group Sb are part of the sensors S that constitute the first sensor group Sa. The operation acceptance unit 990 accepts an operation by the worker on the display unit 932, and outputs a signal that identifies the sensors S that constitute the second sensor group Sb to the transmission command unit 962.

[0185] The transmission command unit 962 outputs a transmission command for signals from the sensors S that make up the second sensor group Sb to the holder internal substrate 410 based on a signal from the operation receiving unit 990. Upon receiving the transmission command from the transmission command unit 962, the holder internal substrate 410 transmits the signals received from the sensors S that make up the second sensor group Sb to the control device 950. The holder internal substrate 410 does not transmit signals from the sensors S that make up the first sensor group Sa but that do not make up the second sensor group Sb to the control device 950.

[0186] The intervals at which signals are transmitted from the sensors S are determined in advance. The intervals at which signals are transmitted from the sensors S may differ depending on the type of sensor S. For example, the intervals at which signals are transmitted from the temperature sensor 911 may be 1 / 1000 seconds, and the intervals at which signals are transmitted from the proximity sensor 381 may be 1 second. If the sensor S is part of the second sensor group Sb, the holder internal substrate 410 continuously transmits the signal of that sensor S at predetermined intervals, and if the sensor S is not part of the second sensor group Sb, the holder internal substrate 410 stops transmitting the signal of that sensor S.

[0187] The signal acquisition unit 961 acquires signals from the sensors S that make up the second sensor group Sb, which signals are transmitted by the holder internal substrate 410. The signal acquisition unit 961 outputs the acquired signals from the sensors S that make up the second sensor group Sb to the storage unit 980, the signal monitoring unit 966, and the display control unit 970.

[0188] The storage unit 980 stores signals from the sensors S that make up the second sensor group Sb for a predetermined period of time (e.g., 24 hours). The signal monitoring unit 966 monitors whether the signal values ​​of the sensors S that make up the second sensor group Sb exceed a predetermined threshold. When the signal monitoring unit 966 determines that the signal value of a specific sensor S exceeds the threshold, it outputs a signal indicating the occurrence of an abnormality to the display control unit 970.

[0189] The display control unit 970 has a first image control unit 971 , a second image control unit 972 , and an operation image control unit 973 .

[0190] 23 , display unit 932 displays first application screen 932A for setting the transmission conditions and storage time of the signal from sensor S. Operation image control unit 973 in FIG. 22 displays first operation image 947 and fourth operation image 949 on display unit 932 (first application screen 932A).

[0191] The first operation image 947 is configured to allow the operator to select a sensor S to be included in the second sensor group Sb from among the sensors S that make up the first sensor group Sa. More specifically, the first operation image 947, when operated by the operator, displays items of the sensors S that make up the first sensor group Sa as a drop-down list. Each item of the sensor S is provided with a check box that the operator can use to select the sensor S to be included in the second sensor group Sb.

[0192] The fourth operation image 949 is configured to allow the operator to set a predetermined time for storing the signal from the sensor S in the storage unit 980. The fourth operation image 949, when operated by the operator, displays candidates for the predetermined time as a drop-down list. Each candidate for the predetermined time is provided with a check box that the operator can select as the predetermined time. The fourth operation image 949 may be configured to allow the operator to directly input the predetermined time.

[0193] 24 to 26, the display unit 932 displays a second application screen 932B for monitoring signals from the sensors S. The first image control unit 971 in Fig. 22 causes the display unit 932 (second application screen 932B) to display a first image 941 indicating items of the sensors S that make up the second sensor group Sb.

[0194] The items of the sensors S displayed in the first image 941 are based on the selection of the sensors S constituting the second sensor group Sb in the first operation image 947. In the first image 941 in FIG. 25 , the items of the sensors S constituting the second sensor group Sb are displayed as "Station 1_Temperature" (corresponding to the temperature sensor 911-1), "Station 2_Temperature" (corresponding to the temperature sensor 911-2), "Station 3_Temperature" (corresponding to the temperature sensor 911-3), "Station 4_Temperature" (corresponding to the temperature sensor 911-4), and "Station 1_Proximity" (corresponding to the proximity sensor 381-1). By stroking the display portion 932 downward, the items of the other sensors S constituting the second sensor group Sb are displayed.

[0195] 25 , the operator operates the display unit 932, which is a touch panel display, to select the sensors S that will constitute the third sensor group Sc from the sensors S that constitute the second sensor group Sb. The sensors S that constitute the third sensor group Sc are part of the sensors S that constitute the second sensor group Sb. The upper limit of the number of sensors S that will constitute the third sensor group Sc is predetermined, and in this embodiment, it is three.

[0196] 24 , the second image control unit 972 in FIG. 22 causes the display unit 932 (second application screen 932B) to display a second image 942, which graphs changes over time in the signals of the sensors S that make up the third sensor group Sc. The second image control unit 972 generates the second image 942 based on the signals of the sensors S acquired by the signal acquisition unit 961, and causes the generated second image 942 to be displayed on the display unit 932. The second image control unit 972 updates the graph display in the second image 942 every time the signal acquisition unit 961 acquires a signal from the sensor S.

[0197] 24 , the upper row 942A of the second image 942 graphically displays the change over time (temperature change) of the signal of "Station 1_Temperature" (corresponding to temperature sensor 911-1), the middle row 942B of the second image 942 graphically displays the change over time (temperature change) of the signal of "Station 2_Temperature" (corresponding to temperature sensor 911-2), and the lower row 942C of the second image 942 graphically displays the change over time (temperature change) of the signal of "Station 3_Temperature" (corresponding to temperature sensor 911-3). In these graphical displays in the second image 942, the vertical axis corresponds to "temperature (K)" and the horizontal axis corresponds to "time (s)." "0 (zero)" on the horizontal axis represents the present, and the temperature change over a certain period of time (120 s) going back from the present is shown.

[0198] 22 receives a signal indicating that the signal value of a specific sensor S exceeds a predetermined threshold from the signal monitoring unit 966. When the second image control unit 972 receives the signal from the signal monitoring unit 966, it changes the appearance of the graph corresponding to the specific sensor S in the second image 942.

[0199] In the second image 942 in Fig. 24, a threshold value used as a criterion for determining whether or not an abnormality exists is indicated by a dotted line. The threshold value is set for each type of sensor by the machine tool manufacturer. The control device 950 may be configured so that the operator can change the threshold value. In the upper section 942A and the lower section 942C of the second image 942, the graph is displayed in blue. In the middle section 942B of the second image 942, the graph display exceeds the threshold value indicated by the dotted line, so the graph is displayed in red. The aspect of the graph that is changed is not limited to color, and may be, for example, the type of line or the thickness of the line.

[0200] Operation image control unit 973 in FIG. 22 further causes display unit 932 to display third operation image 943 which is operated to change the time scale of the graph in second image 942 .

[0201] As shown in FIG. 24 , third operation image 943 is made up of a bar whose horizontal axis corresponds to "time (s)." Third operation image 943 also includes point 944. The operator can adjust the time range of the graph display in second image 942 by pressing point 944 with a finger and sliding it along the horizontal axis of the bar. For example, by moving point 944 from the left end position of the bar indicating "-120 s" to the center position of the bar in the left-right direction indicating "-60 s," the operator can adjust the time scale (display width) on the horizontal axis by half while maintaining the temperature scale on the vertical axis.

[0202] As shown in FIGS. 25 and 26, the operation image control unit 973 in FIG. 22 further displays second operation images 946 (946j, 946k) on the display unit 932 (second application screen 932B).

[0203] The second operation image 946 is configured to allow the operator to select the sensors S that make up the third sensor group Sc from among the sensors S that make up the second sensor group Sb. The operator can select the sensors S that make up the third sensor group Sc by using either the second operation image 946j or the second operation image 946k.

[0204] The second operation image 946j is provided as a check box (indicating "Display") that the operator can select as a sensor S that constitutes the third sensor group Sc, associated with each item of the sensors S that constitute the second sensor group Sb displayed in the first image 941. When the operator selects the check box associated with the item of a specific sensor S, a graph showing the change in the signal of the selected sensor S over time is displayed in the second image 942. The graph showing the change in the signal of the first selected sensor S over time is displayed in the upper section 942A of the second image 942, the graph showing the change in the signal of the next selected sensor S over time is displayed in the middle section 942B of the second image 942, and the graph showing the change in the signal of the last selected sensor S over time is displayed in the lower section 942C of the second image 942.

[0205] The second operation image 946k is displayed in each of the upper 942A, middle 942B, and lower 942C positions of the second image 942. When operated by the operator, the second operation image 946k displays items of the sensors S that make up the second sensor group Sb as a drop-down list. From the drop-down list, the operator can select the sensor S to be displayed graphically in each of the upper 942A, middle 942B, and lower 942C positions of the second image 942.

[0206] In Figure 25, the upper row 942A of the second image 942 displays a second operation image 946k that shows items of sensors S that make up the second sensor group Sb as a drop-down list, such as "Station 1_Temperature" (corresponding to temperature sensor 911-1), "Station 2_Temperature" (corresponding to temperature sensor 911-2), and "Station 3_Temperature" (corresponding to temperature sensor 911-3).

[0207] 26, when the operator selects "Station 1_Temperature" (corresponding to temperature sensor 911-1) from the drop-down list in second operation image 946k, a graph of the change over time (temperature change) of the signal of "Station 1_Temperature" (corresponding to temperature sensor 911-1) is displayed in the upper row 942A of second image 942. At this time, the item "Station 1_Temperature" (corresponding to temperature sensor 911-1) is deleted from first image 941.

[0208] 22 and 24 , a first region Ra and a second region Rb are defined on the display unit 932 (second application screen 932B). The second region Rb is located below the first region Ra on the display unit 932 (second application screen 932B). The second image control unit 972 displays multiple sensing results sensed by the sensor S in the first region Ra as a second image 942. Graphs showing changes over time in the signal of the sensor S in the second image 942 (upper row 942A, middle row 942B, lower row 942C) correspond to the multiple sensing results sensed by the sensor S.

[0209] The first image control unit 971 displays the type of sensing performed by the sensor S in the second region Rb as a first image 941. The item for the sensor S in the first image 941 corresponds to the type of sensing performed by the sensor S.

[0210] 25 , the second operation image 946k is used in the first region Ra to select the sensing result to be displayed in the first region Ra. The second operation image (operation unit) 946k has a function of accepting an operation by the operator to select the sensing result to be displayed in the first region Ra. The second operation image 946k displays sensor S items as a drop-down list, and the sensing result of the sensor S for the checked item in the drop-down list is selected. The second operation image 946k is displayed in the first region Ra. The second operation image 946k is displayed in each of the upper row 942A, middle row 942B, and lower row 942C of the second image 942 displayed in the first region Ra.

[0211] The second operation image 946j is used in the second region Rb to select the sensing result to be displayed in the first region Ra. The second operation image (operation unit) 946j has a function of accepting an operation by the operator to select the sensing result to be displayed in the first region Ra. The second operation image 946j displays check boxes corresponding to each item of the sensor S in the first image 941, and selects the sensing result of the sensor S for the item whose check box is checked. The second operation image 946j is displayed in the second region Rb. The second operation image 946j is displayed in association with each item of the sensor S in the first image 941.

[0212] 22 , 25 , and 26 , second operation image 946 (946j, 946k) accepts an operation by the worker and outputs a selection signal of the sensing result to be displayed in first region Ra to control device 950. Operation accepting unit 990 accepts the selection signal from second operation image 946. Second image control unit 972 causes second image 942 to display the sensing result corresponding to the selection signal from second operation image 946.

[0213] In the tool rest 100, the rotating body 21 is rotated to index a station holding a tool to be used for machining to a predetermined workpiece machining position. Meanwhile, sensors S such as the temperature sensor 911 and acceleration sensor 912 are provided to detect events associated with workpiece machining, such as temperature rise and vibration, at the station indexed to the workpiece machining position. In this case, the control device 950 may read an NC program to identify the sensor S to be located at the station indexed to the workpiece machining position, and automatically select the identified sensor S as the sensor S that constitutes the third sensor group Sc.

[0214] FIG. 27 is a flowchart showing the flow of display control of the display unit by the control device in FIG.

[0215] 22, 23, and 27, first, the control device 950 (display control unit 970) causes the display unit 932 to display the first application screen 932A (S101). In this step, the operation image control unit 973 causes the first operation image 947 to be displayed on the first application screen 932A.

[0216] Next, the control device 950 (operation receiving unit 990) receives a selection of sensors that make up the second sensor group Sb (S102).

[0217] The worker operates the first operation image 947 to select the sensors S that make up the second sensor group Sb from the sensors S that make up the first sensor group Sa. The first operation image 947 accepts the worker's operation and outputs a selection signal for the sensors S that make up the second sensor group Sb to the control device 950. The operation acceptance unit 990 accepts the selection signal from the first operation image 947 and outputs a signal that identifies the sensors S that make up the second sensor group Sb to the transmission command unit 962.

[0218] Next, the control device 950 (transmission command unit 962) outputs a transmission command to the substrate in holder 410 (S103).

[0219] The transmission command unit 962 outputs a command to transmit signals from the sensors S constituting the second sensor group Sb to the holder internal substrate 410 based on a signal from the operation receiving unit 990. The holder internal substrate 410 transmits the signals received from the sensors S constituting the second sensor group Sb to the control device 950.

[0220] Next, the control device 950 (signal acquisition unit 961) acquires signals from the sensors S that make up the second sensor group Sb (S104). The signal acquisition unit 961 outputs the acquired signals from the sensors S that make up the second sensor group Sb to the display control unit 970.

[0221] 22 , 25 , and 27 , next, the control device 950 (display control unit 970) causes the display unit 932 to display the second application screen 932B (first image 941) (S105). The first image control unit 971 causes the second application screen 932B to display items of the sensors S that make up the second sensor group Sb, based on the selection signal from the first operation image 947 in step S102. The operation image control unit 973 causes the second application screen 932B to display the second operation image 946 (946j, 946k) based on the selection signal from the first operation image 947 in step S102.

[0222] Next, the control device 950 (operation receiving unit 990) receives a selection of sensors that make up the third sensor group Sc (S106).

[0223] The worker operates second operation image 946 (946j, 946k) to select sensors S that constitute the third sensor group Sc from among the sensors S that constitute the second sensor group Sb. The second operation image 946 accepts the worker's operation and outputs a selection signal for the sensors S that constitute the third sensor group Sc to the control device 950. The operation accepting unit 990 accepts the selection signal from the second operation image 946 and outputs a signal that identifies the sensors S that constitute the third sensor group Sc to the display control unit 970.

[0224] 22 , 24 , 26 and 27 , next, the control device 950 (display control unit 970) causes the display unit 932 to display the second image 942 (S107). The second image control unit 972 causes the second application screen 932B to display a graph showing the change over time in the signal of the sensor S, based on the selection signal from the second operation image 946.

[0225] The operation panel 930 as an operation device in this embodiment is equipped with a first display means (second image control unit 972) that is capable of holding a tool and that displays in a first area Ra a plurality of sensing results sensed by a sensor S provided on an inverted holder 200 that serves as a tool holder attached to the tool rest 100, a second display means (first image control unit 971) that is capable of holding a tool and that displays in a second area Rb below the first area Ra the type of sensing sensed by the sensor S provided on the inverted holder 200 that is attached to the tool rest 100, a first selection means (second operation image 946k) that is capable of selecting in the first area Ra a sensing result to be displayed in the first area Ra, and a second selection means (second operation image 946j) that is capable of selecting in the second area Rb a sensing result to be displayed in the first area Ra.

[0226] According to this configuration, it is possible to select the sensing result to be displayed in the first region Ra using the second operation image 946k in the first region Ra or the second operation image 946j in the second region Rb, while checking the sensing result candidates to be displayed in the first region Ra based on the type of sensing performed by the sensor S, which is displayed in the second region Rb. This improves the operability of the operation panel 930 when displaying an arbitrary sensing result from multiple candidates.

[0227] The operation panel 930 includes a display unit 932 that defines a first area Ra and a second area Rb located below the first area Ra, and a display control unit 970 that controls image display on the display unit 932. The display control unit 970 includes a second image control unit 972 that displays in a first area Ra a plurality of sensing results sensed by a sensor S provided on an inverted holder 200 that is a tool holder mounted on the tool rest 100 and capable of holding a tool; a first image control unit 971 that displays in a second area Rb the type of sensing sensed by the sensor S provided on the inverted holder 200 that is capable of holding a tool and mounted on the tool rest 100; an operation image control unit 973k that displays in the first area Ra a second operation image 946k that allows the user to select the sensing result to be displayed in the first area Ra; and an operation image control unit 973j that displays in the second area Rb a second operation image 946j that allows the user to select the sensing result to be displayed in the first area Ra.

[0228] To summarize the configuration of machine tool 900 according to the third embodiment of the present invention as described above, machine tool 900 according to the present embodiment includes a display unit 932, at least one tool holder, an inverted holder 200, that is attached to tool rest 100 and is capable of holding a tool, a plurality of sensors S that are provided on at least one inverted holder 200 and that constitute a first sensor group Sa, and a control device 950. By accepting a selection of a sensor S that constitutes a second sensor group Sb from among the sensors S that constitute the first sensor group Sa, control device 950 acquires signals from the sensors S that constitute the second sensor group Sb and displays a first image 941 that indicates the items of the sensors S that constitute the second sensor group Sb on display unit 932, and by accepting a selection of a sensor S that constitutes a third sensor group Sc from among the sensors S that constitute the second sensor group Sb, control device 950 displays a second image 942 that graphs changes over time in the signals from the sensors S that constitute the third sensor group Sc on display unit 932.

[0229] With this configuration, the items of the sensors S constituting the second sensor group Sb from which signals are acquired by the control device 950 can be confirmed through the first image 941, and changes over time in the signals of the sensors S constituting the third sensor group Sc can be visually confirmed through the second image 942. In this case, the sensors S constituting the second sensor group Sb from which signals are acquired by the control device 950 are selected from the sensors S constituting the first sensor group Sa provided in at least one inverting holder 200, and further, the sensors S constituting the third sensor group Sc from which graphs are displayed in the second image 942 are selected from the sensors S constituting the second sensor group Sb, thereby reducing the signal processing load on the control device 950.

[0230] In addition, the control device 950 displays on the display unit 932 a first operation image 947 that is operated to select a sensor S that constitutes the second sensor group Sb from the sensors S that constitute the first sensor group Sa.

[0231] With this configuration, the worker can easily select the sensors S that make up the second sensor group Sb from among the sensors S that make up the first sensor group Sa by operating the first operation image 947.

[0232] In addition, the control device 950 displays on the display unit 932 a second operation image 946 that is operated to select a sensor S that constitutes the third sensor group Sc from the sensors S that constitute the second sensor group Sb.

[0233] With this configuration, the worker can easily select the sensors S that make up the third sensor group Sc from among the sensors S that make up the second sensor group Sb by operating the second operation image 946.

[0234] Furthermore, when the signal value of a specific sensor S exceeds a predetermined threshold, the control device 950 changes the appearance of the graph corresponding to that specific sensor S in the second image 942 .

[0235] With this configuration, the operator can easily recognize an abnormality in the signal value of a specific sensor S through changes in the appearance of the graph in the second image 942.

[0236] In addition, the control device 950 causes the display unit 932 to display a third operation image 943 that is operated to change the time scale of the graph in the second image 942 .

[0237] With this configuration, the operator can easily change the time scale of the graph in second image 942 by operating third operation image 943 .

[0238] Fourth Embodiment Fig. 28 is a perspective view showing a machine tool. In this embodiment, a machine tool 50 including the tool rest 100 shown in Fig. 1 will be described.

[0239] 28, machine tool 50 has tool rest 100 in FIG. 1, a work spindle (not shown) for rotating a workpiece, a cover body 51, and a door 54.

[0240] Cover body 51 defines machining area 56 and also forms the exterior of machine tool 50. Machining area 56 is a space where workpieces are machined, and is sealed by cover body 51 and door 54 to prevent foreign matter such as chips or coolant generated during workpiece machining from leaking outside machining area 56.

[0241] An opening 53 is provided in the cover body 51. The opening 53 opens the processing area 56 to the outside space. A door 54 is provided in the opening 53. The door 54 is attached to the cover body 51 so as to be slidable in the horizontal direction. The door 54 slides to open or close the opening 53.

[0242] The tool rest 100 and work spindle (not shown) are arranged in the machining area 56. Basically, the work is machined by rotating the work by the work spindle and bringing a tool held by the tool rest 100 into contact with the rotating work.

[0243] The embodiments disclosed herein should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is defined by the claims, not by the above description, and is intended to include all modifications within the meaning and scope of the claims.

[0244] This application is based on Japanese Patent Application No. 2024-154104, filed with the Japan Patent Office on September 6, 2024, the entire contents of which are incorporated herein by reference.

[0245] 12 Base, 21 Swivel body, 32 Flange portion, 32a First flange surface, 32b Second flange surface, 32p Disk portion, 32q Tapered portion, 34 Housing portion, 35, 63 Wiring hole, 36 Cover portion, 41 Mounting portion, 42, 320 Base portion, 43, 341 Block, 44, 44A, 44B, 346, 346A, 346B Terminal hole, 45, 552, 571, 572 Seal member, 46 Pin, 46a Tip portion, 47, 221 Resin portion, 47a, 91a Top surface, 48 Pin hole, 49 Pin insertion hole, 50, 760, 900 Machine tool, 51 Cover body, 53 Opening, 54 Door, 56 Processing area, 61 Support body, 62 Motor housing, 66 Built-in motor, 67 Intermediate housing, 68 Bearing, 71 Cylindrical portion, 81 Rotation connector, 82 Movable portion, 83 Fixed portion, 84 Drum, 85 Conductive band, 86 Rotation shaft, 87 Housing, 88 Brush, 91 Cover, 100 Tool rest, 110, 150 Swivel central axis, 120, 160, 880 Rotation central axis, 130J Fixed side wiring, 130K Movable side wiring, 135 Wiring, 140, 140A, 140B Turret side terminal, 191 First internal space, 192 Second internal space, 200, 200D Reversing holder, 210 Tool holder, 210S First tool holder, 210T Second tool holder, 220, 220A, 220B Holder side terminal, 222 Pin part, 223 Contactor, 224, 366 Spring member, 225, 326 Support portion, 301 Shaft portion, 302 Blade portion, 310 Holder body, 320c, 525 Bottom surface, 321 Swivel portion, 322 Sleeve, 327 Positioning pin, 331 Rotation input key, 332 Shaft, 336 First bevel gear, 337 Second bevel gear, 342, 551, 562 Air hole, 361, 361A, 361B Piston cylinder, 371, 371A, 371B Locking piece, 376 Claw portion, 381, 381A, 381B, 830 Proximity sensor, 410 Holder internal circuit board, 420 Turret internal circuit board, 430, 430A, 430B Relay connector, 431 First connector portion, 432 Second connector portion, 510 First surface, 520: Second surface, 530: Recess, 540: Block placement groove, 561: Air groove, 570: Seal groove, 711, 820: Actuator, 721, 841: First electronic circuit, 722,842 Second electronic circuit, 723 Third electronic circuit, 724 Fourth electronic circuit, 800 Jig, 810 Arm, 840 Board, 850A Serial terminal, 850B Power supply terminal, 860 Work spindle, 911 Temperature sensor, 912 Acceleration sensor, 920 Control panel, 930 Operation panel, 931 Operation unit, 932 Display unit, 932A First application screen, 932B Second application screen, 941 First image, 942 Second image, 942A Upper row, 942B Middle row, 942C Lower row, 943 Third operation image, 944 Point, 946, 946j, 946k Second operation image, 947 First operation image, 949 Fourth operation image, 950 Control device, 960 Communication unit, 961 Signal acquisition unit, 962 Transmission command unit, 966 Signal monitoring unit, 970 display control unit, 971 first image control unit, 972 second image control unit, 973 operation image control unit, 980 memory unit, 990 operation reception unit, Ra first area, Rb second area, S sensor, Sa first sensor group, Sb second sensor group, Sc third sensor group, T tool, W workpiece.

Claims

1. A tool post comprising: a support body; a rotating body that is supported by the support body so as to be rotatable about a predetermined axis and has a plurality of mounting portions that are arranged circumferentially about the predetermined axis and that each have a tool holder mountable thereon; a movable portion that rotates about the predetermined axis together with the rotating body; a rotary connector that is provided along the predetermined axis and has a fixed portion that is fixed to the support body and makes electrical contact with the movable portion; terminals that are provided on the mounting portion and make electrical contact with the tool holder; fixed-side wiring that is routed inside the tool post and connected to the fixed portion; and movable-side wiring that is routed inside the tool post and extends between the movable portion and the terminal.

2. The tool post of claim 1, wherein the rotating body has a flange portion provided between the rotary connector and the plurality of mounting portions in the radial direction of the specified axis, and a cover portion that is detachably attached to the flange portion and that, together with the flange portion, defines an internal space in which the rotary connector is disposed.

3. A tool post as described in claim 2, wherein the movable side wiring from the movable part extends into the internal space, the flange part has a first flange surface disposed in the internal space, and further comprises a relay connector attached to the first flange surface and relaying the movable side wiring in the internal space.

4. A tool post as described in claim 3, wherein the flange portion further has a second flange surface arranged on the back side of the first flange surface, the flange portion is provided with a wiring hole consisting of a through hole extending between the first flange surface and the second flange surface and in which the movable side wiring from the relay connector is arranged, and further comprising a board attached to the second flange surface and to which the movable side wiring from the wiring hole is connected.

5. A tool post as described in claim 1, wherein the support has a cylindrical portion having a cylindrical shape centered on the specified axis, the rotary connector is arranged inside the cylindrical portion, the swivel body is fitted onto the outer periphery of the cylindrical portion and swivels around the specified axis while sliding relative to the cylindrical portion, and further has a flange portion provided between the cylindrical portion and the plurality of mounting portions in the radial direction of the specified axis, a fluid groove extending circumferentially about the specified axis and through which a fluid is supplied is provided between the cylindrical portion and the flange portion in the radial direction of the specified axis, and the flange portion is provided with a plurality of fluid holes extending radially from the fluid groove toward the plurality of mounting portions, centered on the specified axis, through which the fluid from the fluid groove flows.

Images