Tool posts and machine tools

Abstract

The present invention provides a tool post capable of easily removing chips adhering to terminals, and a machine tool equipped with such a tool post. [Solution] The tool post has a first surface (510) and a second surface (520) that is stepped with the first surface (510), and the first surface (510) is provided with a mounting portion (41) on which a tool holder (200) can be attached. The mounting portion (41) is provided with a recess (530) that is recessed from the first surface (510) and opens in one direction along the second surface (520), with the second surface (520) positioned at the bottom. The tool post is further provided with a terminal (140) located on the second surface (520) that forms an electrical contact with the tool holder (200).

Description

Technical Field

[0001] This invention relates to a tool rest and a machine tool.

Background Art

[0002] For example, Japanese Unexamined Patent Application 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 is detachably attached to the tool holder turret, and includes a support for supporting a tool that can be driven by the tool holder module, and a smart device that is detachably attached to the support, acquires data related to the tool holder module, and communicates with a cloud computing system.

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

[0004] In addition, Japanese Unexamined Patent Application Publication No. 2020-40202 (Patent Document 2) discloses a tool holder for a turret lathe that includes a servo motor for positioning a pedestal of a tool 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.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0006] A tool post is known to be fitted with a tool holder for holding tools. The tool holder may be equipped with various sensors such as proximity sensors, temperature sensors, or acceleration sensors, and / or actuators such as motors for rotating tools such as drills or for pivoting tools to change their orientation.

[0007] It is conceivable that terminals forming electrical contacts with the tool holder may be provided on the tool post to communicate signals between these sensors and / or actuators and the outside, or to supply power to the sensors and / or actuators. In this case, if chips adhere to the terminals and the tool holder is mounted on the tool post, the reliability of communication may be compromised, and power supply may not be performed properly.

[0008] The object of this invention is to provide a tool post that can easily remove chips adhering to terminals, and a machine tool equipped with such a tool post. [Means for solving the problem]

[0009] A tool post according to this invention has a first surface and a second surface that is stepped with the first surface, and the first surface is provided with a mounting portion on which a tool holder can be attached. The mounting portion is provided with a recess that is recessed from the first surface, opens in one direction along the second surface, and has the second surface as its bottom. The tool post is further provided with terminals located on the second surface that form electrical contacts with the tool holder.

[0010] A machine tool according to this invention is equipped with the above-described tool post. [Effects of the Invention]

[0011] According to this invention, it is possible to provide a tool post that can easily remove chips adhering to terminals, and a machine tool equipped with such a tool post. [Brief explanation of the drawing]

[0012] [Figure 1] It is a perspective view showing a tool rest in Embodiment 1 of this invention. [Figure 2] It is a front view showing the tool rest in FIG. 1. [Figure 3] It is a cross-sectional view showing the tool rest in FIG. 1. [Figure 4] It is a perspective view showing a reversing holder (0° position). [Figure 5] It is a perspective view showing a reversing holder (180° position). [Figure 6] It is a perspective view showing the bottom of the reversing holder. [Figure 7] It is a cross-sectional view showing the internal structure of the reversing holder in FIG. 4. [Figure 8] It is an enlarged cross-sectional view showing a part of the tool rest in FIG. 3. [Figure 9] It is a cross-sectional view schematically showing the rotary connector in FIG. 8. [Figure 10] It is a cross-sectional view showing the tool rest as viewed in the arrow direction on the X-X line in FIG. 3. [Figure 11] It is another enlarged cross-sectional view showing a part of the tool rest in FIG. 3. [Figure 12] It is a perspective view showing an enlarged view of the tool rest within the range surrounded by the two-dot chain line XII in FIG. 1. [Figure 13] It is a cross-sectional view showing the tool rest as viewed in the arrow direction on the XIII-XIII line in FIG. 12. [Figure 14] It is a cross-sectional view showing the mounting state of the second tool holder (reversing holder) with respect to the mounting portion. [Figure 15] It is an enlarged cross-sectional view showing the range surrounded by the two-dot chain line XV in FIG. 14. [Figure 16] It is a cross-sectional view showing the mounting state of the first tool holder with respect to the mounting portion. [Figure 17] It is a block diagram showing the electrical structure of the reversing holder in Embodiment 1 of this invention. [Figure 18] It is a block diagram showing a modification of the electrical structure of the reversing holder in FIG. 17. [Figure 19]It is a front view showing a machine tool using the jig in Embodiment 2 of this invention. [Figure 20] It is a block diagram showing the electrical structure of the jig in FIG. 19. [Figure 21] It is a block diagram showing a machine tool in an embodiment of this invention. [Figure 22] It is a block diagram showing a control system for screen display in the display unit in FIG. 21. [Figure 23] It is a diagram showing the first application screen in the display unit in FIG. 21. [Figure 24] It is a diagram showing the second application screen in the display unit in FIG. 21. [Figure 25] It is another diagram showing the second application screen in the display unit in FIG. 21. [Figure 26] It is yet another diagram showing the second application screen in the display unit in FIG. 21. [Figure 27] It is a flowchart showing the flow of display control of the display unit by the control device in FIG. 22. [Figure 28] It is a perspective view showing a machine tool.

Embodiments for Carrying Out the Invention

[0013] Embodiments of this invention will be described with reference to the drawings. In the drawings referred to below, the same or corresponding members are given the same numbers.

[0014] <00> (Embodiment 1) [Overall Structure of the Tool Holder] FIG. 1 is a perspective view showing a tool holder in Embodiment 1 of this invention. FIG. 2 is a front view showing the tool holder in FIG. 1. FIG. 3 is a cross-sectional view showing the tool holder in FIG. 1.

[0015] Referring to FIGS. 1 to 3, the tool holder 100 is a device for holding tools and is provided in a machine tool.

[0016] A typical example is a lathe, which performs workpiece machining (turning) by bringing a tool into contact with a rotating workpiece. A machine tool has a tool post 100 and a workpiece spindle for rotating the workpiece. The tool post 100 is equipped with a milling function for machining a workpiece by bringing a rotating tool into contact with a stationary workpiece.

[0017] As another example, the machine tool may be a multi-tasking machine that, in addition to the tool post 100 and workpiece spindle described above, further has a tool spindle for rotating the tool.

[0018] The machine tool is an NC (Numerically Controlled) machine tool, in which various operations for workpiece processing are automated by computer numerical control.

[0019] The tool post 100 is located in the machining area of ​​the machine tool. The machining area is the space where the workpiece is machined, and is sealed by a cover to prevent foreign matter such as chips or coolant from leaking out of the machining area.

[0020] The tool post 100 is configured to hold multiple tools. The tool post 100 is a turret-type tool post that moves the multiple tools it holds in the circumferential direction of the pivot axis 110 to index the tool to be used for machining. The pivot axis 110 extends parallel to the rotation axis of the workpiece in the machine tool.

[0021] The tool post 100 includes a base 12, a support 61, a built-in motor 66, and a rotating body (turret) 21.

[0022] The base 12 is supported by the bed of the machine tool. The support 61 is connected to the base 12. The built-in motor 66 is capable of outputting rotation about the rotation axis 120. The rotation axis 120 is perpendicular to the pivot axis 110. The built-in motor 66 is a milling motor for rotating a tool held by the tool holder 210 (described later), and is built into the tool post 100.

[0023] The slewing body 21 extends in a cylindrical shape around the pivot axis 110. The slewing body 21 is supported by a support 61 so as to be able to rotate around the pivot axis 110. The slewing body 21 rotates around the pivot axis 110 by receiving rotation from a motor (not shown) mounted on the base 12.

[0024] The support 61 comprises a motor housing 62 and an intermediate housing 67. The motor housing 62 supports a built-in motor 66. The stator of the built-in motor 66 is fixed to the motor housing 62. The rotor of the built-in motor 66 is supported by the motor housing 62 via bearings (not shown). The motor housing 62 is connected to one end (front end) of the intermediate housing 67 in the axial direction of the pivot axis 110.

[0025] The intermediate housing 67 has a cylindrical shape and extends around the pivot axis 110. The intermediate housing 67 is positioned between the motor housing 62 and the base 12 in the axial direction of the pivot axis 110. The base 12 is connected to the other end (rear end) of the intermediate housing in the axial direction of the pivot axis 110.

[0026] The support 61 further has a cylindrical portion 71. The cylindrical portion 71 has a cylindrical shape centered on the pivot axis 110. The cylindrical portion 71 is connected to one end of the motor housing 62 in the axial direction of the pivot axis 110. The motor housing 62 is positioned between the cylindrical portion 71 and the intermediate housing 67 in the axial direction of the pivot axis 110.

[0027] The slewing body 21 partitions the first internal space 191. The slewing body 21 as a whole has a hollow disc shape centered on the pivot axis 110. The first internal space 191 is formed inside the slewing body 21. The motor housing 62 and the intermediate housing 67 are arranged in the first internal space 191.

[0028] The slewing body 21 has a plurality of mounting parts 41. For example, the slewing body 21 has 12 mounting parts 41. The plurality of mounting parts 41 are arranged in the circumferential direction of the pivot axis 110. The plurality of mounting parts 41 are arranged at equal intervals in the circumferential direction of the pivot axis 110. The plurality of mounting parts 41 form a ring shape with the pivot axis 110 as the center. A motor housing 62 (built-in motor 66) is arranged inside the plurality of mounting parts 41.

[0029] A tool holder 210 is mounted on the mounting section 41. The tool holder 210 is capable of holding a tool. The tool holder 210 is fastened to the mounting section 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 also have a built-in clamping mechanism for clamping and unclamping the tool when the tool held in the tool holder 210 is automatically changed.

[0030] The tool holder 210 is classified into a first tool holder 210S and a second tool holder 210T based on whether or not it has electrical contacts with the tool post 100. The first tool holder 210S cannot make electrical contacts with the tool post 100. The second tool holder 210T has a holder-side terminal 220 (see Figure 6 below), and can make electrical contacts with the tool post 100 via this holder-side terminal 220.

[0031] The slewing body 21 further comprises a flange portion 32 and a housing portion 34. The flange portion 32, the housing portion 34, and the multiple mounting portions 41 are integrally molded from metal. The multiple mounting portions 41 are positioned between the flange portion 32 and the housing portion 34 in the axial direction of the pivot central axis 110.

[0032] The flange portion 32 flares out in a flange shape around the pivot axis 110. The flange portion 32 is located between the cylindrical portion 71 and the multiple mounting portions 41 in the radial direction of the pivot axis 110. The flange portion 32 is located between the rotary connector 81 (described later) and the multiple mounting portions 41 in the radial direction of the pivot axis 110. The flange portion 32 faces the motor housing 62 in the axial direction of the pivot axis 110.

[0033] The flange portion 32 has a disc portion 32p and a tapered portion 32q. The disc portion 32p as a whole has a disc shape in which the axial direction of the pivot axis 110 corresponds to the thickness direction. The disc portion 32p is provided at a position away from the plurality of mounting portions 41 in the axial direction of the pivot axis 110. The tapered portion 32q has a tapered cylindrical shape that extends around the pivot axis 110 while changing its diameter around the pivot axis 110. The end of the tapered portion 32q on the smaller diameter side is connected to the outer edge of the disc portion 32p. The end of the tapered portion 32q on the larger diameter side is connected to the plurality of mounting portions 41.

[0034] The flange portion 32 is fitted onto the outer circumference of the cylindrical portion 71. When the slewing body 21 rotates, the flange portion 32 rotates around the pivot axis 110 while sliding against the cylindrical portion 71. The flange portion 32 is supported by the cylindrical portion 71 so that it can rotate around the pivot axis 110.

[0035] The housing portion 34 has a cylindrical shape as a whole, centered on the pivot axis 110. One end of the housing portion 34 in the axial direction of the pivot axis 110 is connected to a plurality of mounting portions 41. The housing portion 34 is positioned on the outer circumference of the intermediate housing 67. A bearing 68 is interposed between the housing portion 34 and the intermediate housing 67.

[0036] The rotating body 21 further has 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. Together with the flange portion 32 (disk portion 32p), the cover portion 36 forms a second internal space 192. A rotating connector 81, described later, is located in the second internal space 192.

[0037] As shown in Figure 8 below, 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 pivot axis 110. The first flange surface 32a is located in the second internal space 192. The first flange surface 32a faces the cover portion 36 at a distance in the axial direction of the pivot axis 110. The second flange surface 32b is located on the back side of the first flange surface 32a. The second flange surface 32b is a plane perpendicular to the axial direction of the pivot axis 110. The second flange surface 32b is located in the first internal space 191. The second flange surface 32b faces the motor housing 62 at a distance in the axial direction of the pivot axis 110.

[0038] The cover portion 36 extends cylindrically around the pivot axis 110, and has a closed shape at one end in the axial direction of the pivot axis 110. 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.

[0039] The tool post 100 further includes a rotary connector 81. The rotary connector 81 is provided along the 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.

[0040] [Basic structure of the second tool holder (reversing holder)] Figure 4 is a perspective view showing the inversion holder (0° position). Figure 5 is a perspective view showing the inversion holder (180° position). Figure 6 is a perspective view showing the bottom of the inversion holder. Figure 7 is a cross-sectional view showing the internal structure of the inversion holder in Figure 4.

[0041] Referring to Figures 4 to 7, the figures show an example of a second tool holder 210T capable of forming an electrical contact with the tool post 100, which includes a reversing holder 200 equipped with a reversing mechanism for changing the orientation of the tool T by 180°.

[0042] The reversing 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 shaft portion 301 and a cutting edge portion 302. The shaft portion 301 has a shaft shape extending in one direction. One end of the shaft portion 301 is held by the holder body 310. The shaft portion 301 extends radially to the pivot center axis 150, which will be described later. The cutting edge portion 302 consists of a throwaway tip and is attached to the other end of the shaft portion 301.

[0043] The holder body 310 has a support portion 326 and a swivel portion 321. The support portion 326 is the part that is fixed to the mounting portion 41 of the tool post 100. The swivel portion 321 is supported by the support portion 326 so that it can swivel around the swivel axis 150. The swivel axis 150 extends in the tangential direction of the arc centered on the swivel axis 110 of the tool post 100. The tool T (shaft portion 301) is held by the swivel portion 321.

[0044] The reversing holder 200 further comprises a rotary input key 331, a shaft 332, a first bevel gear 336, and a second bevel gear 337. The shaft 332 extends along the rotational axis 160. The axial direction of the rotational axis 160 corresponds to the radial direction of the pivot axis 110 of the tool post 100. The shaft 332 is supported by a support portion 326 so as to be rotatable about the rotational axis 160.

[0045] The rotation input key 331 is connected to one end of the shaft 332 in the axial direction of the rotation center axis 160. The first bevel gear 336 is connected to the other end of the shaft 332 in the axial direction of the rotation center axis 160. When the reversing holder 200 is mounted on the mounting portion 41 of the tool post 100, the rotation input key 331 is connected to the rotor of the built-in motor 66 incorporated in 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 around the rotation center axis 160.

[0046] The second bevel gear 337 meshes with the first bevel gear 336. The second bevel gear 337 is supported so as to be rotatable around the pivot axis 150. The second bevel gear 337 is rotatable around the pivot axis 150 in conjunction with the slewing section 321. The rotation of the first bevel gear 336 is transmitted to the second bevel gear 337, causing the slewing section 321 to rotate around the pivot axis 150.

[0047] The swivel section 321 is capable of swiveling between the 0° position shown in Figure 4 and the 180° position shown in Figure 5. The orientation of the tool T held in the reversal holder 200 (the orientation of the cutting edge 302) is reversed between the 0° position shown in Figure 4 and the 180° position shown in Figure 5. In the 0° position shown in Figure 4, the tool T faces in one direction along the axial direction of the swivel center axis 110 of the tool post 100, and in the 180° position shown in Figure 5, it faces the other direction along the axial direction of the swivel center axis 110 of the tool post 100.

[0048] The reversing holder 200 is equipped with a locking mechanism for fixing the swivel section 321 in the 0° position shown in Figure 4 and the 180° position shown in Figure 5. The locking mechanism will be described below.

[0049] As shown in Figure 7, the swivel section 321 has a sleeve 322. The sleeve 322 is positioned radially outward from the swivel center axis 150, away from the second bevel gear 337. The sleeve 322 has a cylindrical shape that extends radially from the swivel center axis 150. The sleeve 322 is positioned to cover the shaft portion 301 of the tool T.

[0050] The reversing holder 200 has locking pieces 371 (371A, 371B). The locking pieces 371 are provided on the support portion 326. The locking pieces 371 are supported by the support portion 326 so as to be slidable in the axial direction of the pivot axis 110 of the tool post 100. The locking pieces 371A and 371B are provided spaced apart from each other in the axial direction of the pivot axis 110 of the tool post 100. The shaft 332 is positioned between the locking pieces 371A and 371B in the axial direction of the pivot axis 110 of the tool post 100.

[0051] The reversing holder 200 further comprises a spring member 366 and a piston cylinder 361 (361A, 361B).

[0052] The spring member 366 is provided on the support portion 326. The spring member 366 is interposed between the locking piece 371A and the locking piece 371B in the axial direction of the pivot axis 110 of the tool post 100. The spring member 366 acts an elastic force on the locking piece 371 in the axial direction of the pivot axis 110, in a direction that moves the locking piece 371A and the locking piece 371B away from each other.

[0053] The piston cylinder 361 is provided on the support portion 326. The piston cylinder 361 is air-operated and driven by the supply of 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.

[0054] The locking piece 371 has a claw portion 376. The claw portion 376 protrudes in the axial direction of the pivot axis 110 of the tool post 100 and has a claw shape capable of locking onto the edge of the sleeve 322. The claw portion 376 of locking piece 371A faces the edge of the sleeve 322 when the pivot portion 321 is positioned at the 0° position in the axial direction of the pivot axis 110. The claw portion 376 of locking piece 371B faces the edge of the sleeve 322 when the pivot portion 321 is positioned at the 180° position in the axial direction of the pivot axis 110.

[0055] The locking piece 371 receives the elastic force of the spring member 366, causing the claw portion 376 to slide in a direction approaching the edge of the sleeve 322. When the swivel portion 321 is positioned at 0°, the claw portion 376 of locking piece 371A engages with the edge of the sleeve 322, locking the swivel portion 321 in the 0° position. When the swivel portion 321 is positioned at 180°, the claw portion 376 of locking piece 371B engages with the edge of the sleeve 322, locking the swivel portion 321 in the 180° position.

[0056] As air is supplied to the piston cylinder 361, the piston cylinder 361A pushes the locking piece 371A toward the locking piece 371B against 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 against 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 axis 110 of the tool post 100. When the swivel section 321 is positioned at 0°, the claw portion 376 of the locking piece 371A moves away from the edge of the sleeve 322, and the lock on the swivel section 321 by the locking piece 371A is released. When the swivel section 321 is positioned at 180°, the claw portion 376 of the locking piece 371B moves away from the edge of the sleeve 322, and the lock on the swivel section 321 by the locking piece 371B is released.

[0057] The reversing holder 200 further includes proximity sensors 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 from 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.

[0058] The proximity sensor 381A detects the locking piece 371A and is positioned opposite the locking piece 371A in the axial direction of the pivot center axis 110. The proximity sensor 381B detects the locking piece 371B and is positioned opposite the locking piece 371B in the axial direction of the pivot center axis 110. The proximity sensor 381A can detect the locking and unlocking of the pivot section 321 by the locking piece 371A. The proximity sensor 381B can detect the locking and unlocking of the pivot section 321 by the locking piece 371B.

[0059] As shown in Figures 6 and 7, the holder body 310 has a base portion 320 and a block 341. The base portion 320 is composed of the above-mentioned swivel portion 321 and support portion 326 and is capable of holding the tool T. The base portion 320 (support portion 326) has a bottom surface 320c. The bottom surface 320c is in surface contact with the first surface 510 of the mounting portion 41, which will be described later. The rotary input key 331 is provided in a position that protrudes from the bottom surface 320c.

[0060] 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 each other in the planar direction of the bottom surface 320c. When viewing the bottom surface 320c from the front, the rotary input key 331 is provided in a position surrounded by the plurality of positioning pins 327.

[0061] Block 341 is detachably attached to the holder body 310. Block 341 is fastened to the holder body 310 (support portion 326) using bolts or the like. Block 341 is provided so as to protrude from the bottom surface 320c. Block 341 is provided between two adjacent positioning pins 327 in the axial direction of the pivot center axis 150. When the bottom surface 320c is viewed from the front, Block 341 is provided in the axial direction of the pivot center axis 110 of the tool post 100, alongside the rotation input key 331.

[0062] The reversing holder 200 further has 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 mounted on the mounting section 41.

[0063] The holder-side terminals 220 (220A, 220B) are provided in the block 341. The block 341 is provided with terminal holes 346 (346A, 346B). The terminal holes 346 are through holes that penetrate the block 341 in the axial direction of the rotational center axis 160. The holder-side terminals 220 are positioned in the terminal holes 346. The holder-side terminals 220A and 220B are positioned in terminal holes 346A and 346B, respectively.

[0064] The base portion 320 (support portion 326) is provided with an air vent 342. The air vent 342 opens adjacent to the block 341 and extends toward the piston cylinders 361 (361A, 361B). Air is supplied to the reversing holder 200 from the mounting portion 41. The air is supplied to the piston cylinders 361 (361A, 361B) through the air vent 342 and piping (not shown).

[0065] [Wiring and piping structure in the tool post] Figure 8 is a cross-sectional view showing an enlarged portion of the tool post in Figure 3. Figure 9 is a cross-sectional view schematically showing the rotary connector in Figure 8. Figure 10 is a cross-sectional view showing the tool post as seen in the direction of the arrow on line XX in Figure 3.

[0066] Referring to Figures 3 and 8 to 10, the tool post 100 further has a plurality of turret-side terminals 140 (140A, 140B). Each of the plurality of turret-side terminals 140 is provided on a plurality of mounting parts 41.

[0067] When the reversing holder 200 is mounted on the mounting section 41, the turret-side terminal 140 makes an electrical contact with the reversing holder 200. When the reversing holder 200 is mounted on the mounting section 41, the turret-side terminal 140A is connected to the holder-side terminal 220A of the reversing holder 200 in Figure 6, and the turret-side terminal 140B is connected to the holder-side terminal 220B of the reversing holder 200 in Figure 6.

[0068] As shown in Figure 9, the rotary connector 81 has a movable part 82 and a fixed part 83. The movable part 82 is a movable component that can rotate together with the swivel body 21 around the pivot axis 110. The movable part 82 has a rotating shaft 86 and a drum 84. The rotating shaft 86 extends axially along the pivot axis 110. The drum 84 has a cylindrical shape centered on the pivot axis 110 and is fitted onto the outer circumference of the rotating shaft 86. Multiple conductive strips 85 are provided on the outer surface of the drum 84. The conductive strips 85 are made of metal. The conductive strips 85 have a ring shape that extends in the circumferential direction of the pivot axis 110. The multiple conductive strips 85 are provided spaced apart from each other in the axial direction of the pivot axis 110.

[0069] The fixed part 83 is fixed to the support body 61. The fixed part 83 is detachably attached to the cylindrical part 71. The fixed part 83 is fastened to the cylindrical part 71 using bolts or the like. The fixed part 83 is a fixed-side component that does not rotate together with the swivel body 21. The fixed part 83 is configured to make electrical contact with the movable part 82. More specifically, the fixed part 83 has a housing 87 and a plurality of brushes 88. The housing 87 has a cylindrical shape centered on the pivot axis 110 and is provided on the outer circumference of the drum 84. The housing 87 supports the rotating shaft 86 so that it can rotate around the pivot axis 110. The plurality of brushes 88 are supported by the housing 87. The plurality of brushes 88 are provided spaced apart from each other in the axial direction of the pivot axis 110. The brushes 88 are made of metal wires. The brush 88 extends from the housing 87 and is in contact with the energized strip 85.

[0070] The tool post 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 post 100. The fixed-side wiring 130J and the movable-side wiring 130K are not exposed in the machining area of ​​the machine tool.

[0071] The fixed-side wiring 130J is connected to the fixed part 83. The fixed-side wiring 130J is electrically connected to multiple brushes 88 in the fixed part 83. The movable-side wiring 130K extends between the movable part 82 and multiple turret-side terminals 140. The movable-side wiring 130K is electrically connected to multiple energized bands 85 in the movable part 82. The rotary connector 81 relays the fixed-side wiring 130J and the movable-side wiring 130K.

[0072] As shown in Figures 3 and 8, the fixed-side wiring 130J runs from outside the tool post 100, through the base 12 and the intermediate housing 67, and extends in the axial direction of the pivot axis 110. The motor housing 62 is provided with a wiring hole 63. The wiring hole 63 is a through hole that penetrates the motor housing 62 in the axial direction of the pivot axis 110. The fixed-side wiring 130J that runs through the intermediate housing 67 extends through the wiring hole 63 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 (multiple brushes 88).

[0073] The rotary connector 81 is provided spanning 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 pivot axis 110 is located in the second internal space 192. The rotary connector 81 is detachable from the cylindrical portion 71 through the second internal space 192.

[0074] As shown in Figures 8 to 10, the movable side wiring 130K from the movable part 82 (multiple energized strips 85) extends into the second internal space 192.

[0075] The tool post 100 further includes relay connectors 430 (430A, 430B). The relay connectors 430 are located in the second internal space 192. The relay connectors 430 are attached to the first flange surface 32a. Relay connectors 430A and 430B are spaced apart from each other in the circumferential direction of the pivot axis 110. The movable side wiring 130K from the movable part 82 is connected to the relay connectors 430. The relay connectors 430 relay the movable side wiring 130K in the second internal space 192.

[0076] 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, shifting radially outward from the pivot center axis 110. The movable side wiring 130K from the relay connector 430 is located in the wiring hole 35. The movable side wiring 130K extends through the wiring hole 35 into the first internal space 191.

[0077] The wiring hole 35 opens in the first flange surface 32a at an angular position between the intermediate connectors 430A and 430B in the circumferential direction of the pivot axis 110. The movable side wiring 130K from the movable part 82 is first routed from the radially inner to the radially outer direction 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 intermediate 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 intermediate connector 430B.

[0078] The relay connector 430 has a first connector section 431 and a second connector section 432. The first connector section 431 and the second connector section 432 are detachably connected to each other. The first connector section 431 is connected to the movable side wiring 130K from the rotary connector 81 (movable section 82). The second connector section 432 is connected to the movable side wiring 130K extending toward the turret side terminal 140.

[0079] As shown in Figure 8, the tool post 100 further has a plurality of turret internal base plates 420. The plurality of turret internal base plates 420 are arranged in the first internal space 191. The plurality of turret internal base plates 420 are attached to the second flange surface 32b. The plurality of turret internal base plates 420 are spaced apart from each other in the circumferential direction of the pivot axis 110. The plurality of turret internal base plates 420 are provided corresponding to a plurality of mounting parts 41 (a plurality of turret-side terminals 140). Movable-side wiring 130K from the wiring hole 35 is connected to the plurality of turret internal base plates 420.

[0080] Furthermore, a single turret internal circuit board 420, which integrates the functions of multiple turret internal circuit boards 420, may be mounted on the second flange surface 32b.

[0081] The movable wiring 130K from the circuit board 420 inside each turret is connected to the turret-side terminal 140 provided on each mounting section 41.

[0082] Figure 11 is another cross-sectional view showing a magnified portion of the tool post in Figure 3. The cross-sectional view in Figure 11 shows the tool post 100 at a different position than the cross-sectional view in Figure 8.

[0083] Referring to Figures 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 pivot axis 110. The air groove 561 extends in an annular shape in the circumferential direction of the pivot axis 110. The air groove 561 is composed of a groove recessed from the outer circumferential surface of the cylindrical portion 71 and circumferential around the pivot axis 110, and a groove recessed from the inner circumferential surface of the flange portion 32 and circumferential around the pivot axis 110.

[0084] The tool post 100 further includes a sealing member 571 and a sealing member 572. Each of the sealing members 571 and 572 extends annularly in the circumferential direction of the pivot axis 110. Each of the sealing 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 axis 110. The air groove 561 is located between the sealing members 571 and 572 in the axial direction of the pivot axis 110.

[0085] 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 pivot axis 110. The plurality of air holes 562 are spaced apart from each other in the circumferential direction of the pivot axis 110. Each air hole 562 extends from the radially inner side to the radially outer side of the pivot axis 110. Each air hole 562 spans the disc portion 32p and the tapered portion 32q in the radial direction of the pivot axis 110. One end of the air hole 562 on the radially inner side of the pivot axis 110 communicates with the air groove 561. The other end of the air hole 562 on the radially outer side of the pivot axis 110 communicates with an air hole 551, which will be described later.

[0086] Multiple mounting portions 41 are each provided with multiple air holes 551. The air holes 551 open into the 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 the block 43 and base portion 42 of the mounting portion 42, which will be described later.

[0087] With the reversing holder 200 mounted on the mounting portion 41, the air hole 551 communicates with the air hole 342 (see Figures 6 and 7) provided in the reversing holder 200. As shown in Figure 12 below, the mounting portion 41 (block 43) is provided with a sealing member 552. The sealing member 552 has a ring shape. The sealing member 552 is provided so as to encircle the opening surface of the air hole 551 on the second surface 520. The sealing member 552 seals the air passage between the air hole 551 and the air hole 342.

[0088] An air pipe (not shown) is connected to the rear end of the motor housing 62 to supply air from the outside. The motor housing 62 and the cylindrical portion 71 are provided with air holes (not shown) that guide air from the air pipe to an air channel 561. As the air flows through the air channel 561, it flows into an air hole 562 connected to the mounting portion 41 to which the reversing holder 200 is attached. The air flowing through the air hole 562 passes through air holes 551 and 342 in that order and is supplied to the piston cylinder 361 (361A, 361B).

[0089] To summarize the structure of the tool post 100 in Embodiment 1 of this invention, which has been mainly described in this section, the tool post 100 in this embodiment comprises a support 61, a swivel body 21 which is arranged in the circumferential direction of the pivot central axis 110 as a predetermined axis and has a plurality of mounting parts 41 on which a reversing holder 200 as a tool holder can be attached, and is supported by the support 61 so as to be able to rotatably around the pivot central axis 110, a movable part 82 which rotates together with the swivel body 21 around the pivot central axis 110, and support The rotating 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 provided along the pivot axis 110; the turret-side terminal 140 is provided on the mounting part 41 and serves as a terminal that makes electrical contact with the reversing holder 200; the fixed-side wiring 130J is routed inside the tool post 100 and connected to the fixed part 83; and the movable-side wiring 130K is routed inside the tool post 100 and extends between the movable part 82 and the turret-side terminal 140.

[0090] With this configuration, an electrical path including fixed-side wiring 130J, a rotary connector 81, movable-side wiring 130K, and a turret-side terminal 140 can be configured inside the tool post 100. This makes it possible to communicate with the reversing holder 200 via a wired connection, thereby improving the reliability of communication. Furthermore, since power can be supplied to the reversing holder 200 via a wired connection, it becomes unnecessary to install a battery in the reversing holder 200, allowing the reversing holder 200 to be made smaller.

[0091] As a result, in the use of electricity in the reversing holder 200, it is possible to realize a tool post 100 that improves the reliability of communication and allows for miniaturization of the reversing holder 200.

[0092] Furthermore, the swivel body 21 has a flange portion 32 provided between the rotary connector 81 and the plurality of mounting portions 41 in the radial direction of the pivot central axis 110, and a cover portion 36 that is detachably attached to the flange portion 32 and together with the flange portion 32 defines a second internal space 192, which is an internal space in which the rotary connector 81 is located.

[0093] With this configuration, the worker can access the rotary connector 81 by removing the cover portion 36 from the flange portion 32. This improves the ease of maintenance of the rotary connector 81.

[0094] Furthermore, the movable side wiring 130K from the movable part 82 extends into the second internal space 192. The flange portion 32 has a first flange surface 32a located in the second internal space 192. The tool post 100 further includes a relay connector 430 attached to the first flange surface 32a, which relays the movable side wiring 130K in the second internal space 192.

[0095] With this configuration, the movable side wiring 130K extending from the rotary connector 81 (movable part 82) can be separated at the relay connector 430 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.

[0096] Furthermore, the flange portion 32 has a second flange surface 32b located on the back side of the first flange surface 32a. The flange portion 32 is provided with a wiring hole 35, which consists of 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 arranged. The tool post 100 further includes a turret internal substrate 420, which is attached to the second flange surface 32b and serves as a substrate to which the movable side wiring 130K from the wiring hole 35 is connected.

[0097] 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 placed on the path of the movable wiring 130K between the relay connector 430 and the turret-side terminal 140.

[0098] Furthermore, the support 61 has a cylindrical portion 71 having a cylindrical shape centered on the pivot axis 110. The rotating connector 81 is positioned inside the cylindrical portion 71. The swivel body 21 is fitted onto the outer circumference of the cylindrical portion 71 and rotates around the pivot axis 110 while sliding relative to the cylindrical portion 71, and further has a flange portion 32 provided between the cylindrical portion 71 and the plurality of mounting portions 41 in the radial direction of the pivot axis 110. Between the cylindrical portion 71 and the flange portion 32 in the radial direction of the pivot axis 110, there is an air groove 561 which extends in the circumferential direction of the pivot axis 110 and is supplied with air as a fluid. The flange portion 32 is provided with a plurality of air holes 562 which extend radially from the air groove 561 toward the plurality of mounting portions 41 around the pivot axis 110 and are supplied with air from the air groove 561.

[0099] With this configuration, an electrical path is formed by a rotary connector 81 on the radially inner side of the pivot axis 110, flanking the cylindrical portion 71, and an air passage is formed by an air groove 561 and multiple air holes 562 on the radially outer side of the pivot axis 110, flanking the cylindrical portion 71. This allows the electrical path and air passage toward the mounting portion 41 to be compactly provided in the axial direction of the pivot axis 110.

[0100] In this embodiment, the fluid flowing through the fluid grooves and fluid holes in the present invention is described as air supplied to the piston cylinder 361, but the invention is not limited to this. The fluid in the present invention may be, for example, oil for operating the clamping mechanism of a tool mounted on a tool holder, air for detecting the clamping of the tool using air pressure, air for confirming the seating of the tool holder on the mounting portion (first surface 510, described later), or coolant discharged toward the cutting edge of the tool. Multiple fluid flow channels may be configured by providing multiple pairs of fluid grooves and fluid holes in the present invention, spaced apart from each other in the axial direction of a predetermined axis.

[0101] [Structure of the mounting section (turret-side terminal) on the tool post] Figure 12 is a magnified perspective view of the tool post area enclosed by the dashed line XII in Figure 1. Figure 13 is a cross-sectional view of the tool post as seen in the direction of the arrow along the line XIII-XIII in Figure 12.

[0102] Note that while Figure 13 and subsequent Figures 14 to 16 show typical examples of the turret-side terminal 140A and / or the holder-side terminal 220A, the turret-side terminal 140A and holder-side terminal 220A, and the turret-side terminal 140B and holder-side terminal 220B, have the same structure, differing only in the number of pins. The number of pins in the turret-side terminal 140A and holder-side terminal 220A is greater than the number of pins in the turret-side terminal 140B and holder-side terminal 220B.

[0103] Referring to Figures 2, 8, 12, and 13, the mounting portion 41 has a first surface 510 and a second surface 520.

[0104] Each of the first surface 510 and the second surface 520 is a plane perpendicular to the radial direction of the pivot axis 110. Each of the first surface 510 and the second surface 520 faces radially outward from the pivot axis 110. The first surface 510 extends along the sides of a regular polygon (regular dodecagon) centered on the pivot axis 110, when viewed in the axial direction of the pivot axis 110. The second surface 520 is stepped over the first surface 510. The second surface 520 is positioned radially inward from the pivot axis 110 than the first surface 510.

[0105] The first tool holder 210S and the second tool holder 210T are mounted on the first surface 510. The bottom surface 320c (see Figures 6 and 7) of the reversing holder 200 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 onto the first surface 510. When the reversing holder 200 is mounted on the mounting portion 41, the plurality of positioning pins 327 shown in Figures 6 and 7 are inserted into the plurality of pin insertion holes 49, thereby positioning the reversing holder 200 relative to the mounting portion 41.

[0106] The mounting portion 41 is further provided with a recess 530. The recess 530 has a concave shape that is recessed from the first surface 510. The direction perpendicular to the first surface 510 (the radial direction of the pivot center axis 110) corresponds to the depth direction of the recess 530. The second surface 520 is located 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 in one direction along the second surface 520. The recess 530 is open in one direction along the axial direction of the pivot center axis 110.

[0107] The second surface 520 (the bottom surface of the recess 530) is surrounded by the wall formed by the mounting portion 41 in one direction along the axial direction of the pivot axis 110, one direction along the tangential direction of the arc centered on the pivot axis 110, and the other direction along the tangential direction of the arc centered on the pivot axis 110.

[0108] The turret-side terminal 140 is located on the second surface 520. The turret-side terminal 140 is 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 onto 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 terminal 140 is located in the terminal holes 44. The turret-side terminal 140A and the turret-side terminal 140B are located in terminal holes 44A and 44B, respectively.

[0109] 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, housing portion 34, and base portion 42 are integrally molded from metal. The tool holder 210 is mounted on the base portion 42. The block 43 has a second surface 520. The block 43 is a separate metal block 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.

[0110] Terminal holes 44 are provided between block 43 and base portion 42. Turret-side terminals 140 are located in terminal holes 44 provided in block 43. Movable-side wiring 130K from the turret internal circuit board 420 extends to turret-side terminals 140 through terminal holes 44 provided in base portion 42 and block 43.

[0111] The base portion 42 is provided with a block arrangement groove 540. The block arrangement groove 540 has a concave shape that recesses from the first surface 510. The block arrangement groove 540 is open in one direction along the axial direction of the pivot axis 110. As shown in Figure 8, the base portion 42 has a bottom surface 525. The bottom surface 525 is located at the bottom of the block arrangement groove 540. The depth Hb of the block arrangement 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).

[0112] Block 43 is positioned in the block placement groove 540. Block 43 has a rectangular parallelepiped shape with the second face 520 as its apex. The second face 520 is positioned between the first face 510 and the bottom face 525 of the block placement groove 540. The second face 520 is located closer to the first face 510 than the bottom face 525 in the radial direction of the pivot axis 110. The depth Ha of the recess 530 may be in the range of 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 also be in the range of 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 times the length Hc between the pivot axis 110 and the first surface 510 in the radial direction of the pivot axis 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 times the length Hc between the pivot axis 110 and the first surface 510 in the radial direction of the pivot axis 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).

[0113] Furthermore, if the block 43 is removed from the base portion 42, the block placement groove 540 may be used as a space to avoid interference between the tool protruding from the first tool holder 210S and the base portion 42.

[0114] The tool post 100 further includes a sealing member 45. The sealing member 45 has a ring shape. The mounting portion 41 (block 43) is further provided with a sealing groove 570. The sealing groove 570 is recessed from the second surface 520 and has a groove shape that circles around the opening edge of the terminal hole 44. The sealing member 45 is positioned in the sealing groove 570. The sealing member 45 is positioned to circle around the outer circumferential surface of the turret-side terminal 140. The sealing member 45 seals the space where the electrical contacts between the turret-side terminal 140 and the holder-side terminal 220 are located.

[0115] Referring to Figures 1 to 3, it is possible to selectively mount either the first tool holder 210S or the second tool holder 210T to each mounting section 41. In the figures, the second tool holder 210T (reversing holder 200) is mounted to one mounting section 41, and the first tool holder 210S is mounted to the remaining 11 mounting sections 41.

[0116] The tool post 100 further includes a cover 91. The cover 91 is attached to the mounting section 41 on which the first tool holder 210S is mounted. The cover 91 is not attached to the mounting section 41 on which the second tool holder 210T (reversing holder 200) is mounted.

[0117] Figure 14 is a cross-sectional view showing the mounting state of the second tool holder (reversing holder) to the mounting section. Figure 15 is a cross-sectional view showing an enlarged view of the area enclosed by the dashed line XV in Figure 14.

[0118] Referring to Figures 14 and 15, in the mounting section 41 where the second tool holder 210T (reversing holder 200) is attached, the turret-side terminal 140 is exposed to the second surface 520 because the cover 91 is not attached.

[0119] With the reversal holder 200 mounted on the mounting 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 is in contact with the sealing member 45.

[0120] The turret-side terminal 140 has a resin part 47 and a plurality of pins 46. The resin part 47 has a top surface 47a. The top surface 47a faces the holder-side terminal 220 with a gap between them. The resin part 47 is provided with a plurality of pin holes 48. The plurality of pin holes 48 open to the top surface 47a at intervals from each other. The plurality of pins 46 are each positioned in the plurality of pin holes 48. The plurality of pins 46 are held integrally by the resin part 47. The pins 46 have a pin shape that extends in one direction. The pins 46 are made of metal.

[0121] The turret-side terminal 140 is provided so as to protrude from the second surface 520. The turret-side terminal 140 is 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.

[0122] The holder-side terminal 220 has a resin portion 221 and a plurality of pin components 222. The resin portion 221 corresponds to the resin portion 47 on the turret-side terminal 140, and the plurality of pin components 222 correspond to the plurality of pins 46 on the turret-side terminal 140. The plurality of pin components 222 are held integrally by the resin portion 221. Each of the plurality of pin components 222 contacts one of the plurality of pins 46, thereby forming an electrical contact between the holder-side terminal 220 and the turret-side terminal 140.

[0123] 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 positioned recessed in the pin hole 48 compared to the opening surface of the pin hole 48 on the top surface 47a. The difference in height 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.

[0124] 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 that extends in a predetermined direction. The contact 223 is made of metal. The contact 223 is supported by the support portion 225 so that it can slide 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 wire 135. The contact 223 is electrically connected to the holder internal substrate 410 (see Figure 7) by the wire 135.

[0125] 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 that presses the contact 223 toward the pin 46. When the reversing holder 200 is mounted on the mounting portion 41, the contact 223 is pushed into the support portion 225 by the pin 46, resisting the elastic force of the spring member 224. With this configuration, sufficient contact pressure can be ensured between the pin component 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.

[0126] Figure 16 is a cross-sectional view showing the mounting state of the first tool holder to the mounting section. Referring to Figure 16, in the mounting section 41 to which the first tool holder 210S is mounted, the turret-side terminal 140 is not exposed to the second surface 520 because the cover 91 is attached.

[0127] The cover 91 is detachably attached to the second surface 520. The cover 91 is positioned in the recess 530. The cover 91 is detachably attached to the block 43. The cover 91 is fastened to the block 43 using bolts or the like. The cover 91 is provided to cover the turret-side terminal 140 that protrudes from the second surface 520. The cover 91 is in contact with the sealing member 45. The cover 91 is provided to close the air hole 551 (see Figures 11 and 12) that opens to the second surface 520. The cover 91 is in contact with the sealing member 552 (see Figures 11 and 12).

[0128] The lid 91 is made of a plate material having a rectangular shape that corresponds to the second surface 520 when viewed in the depth direction of the recess 530, with the depth direction of the recess 530 corresponding to the thickness direction. The lid 91 has a thickness smaller than the step difference between the first surface 510 and the second surface 520. The lid 91 has a top surface 91a. The top surface 91a is located between the first surface 510 and the second surface 520 in the depth direction of the recess 530.

[0129] The first tool holder 210S is mounted on the first surface 510. A gap is provided between the first tool holder 210S and the cover 91.

[0130] To summarize the structure of the tool post 100 in Embodiment 1 of this invention, which is mainly described in this section, the tool post 100 in this embodiment has a first surface 510 and a second surface 520 that is stepped with the first surface 510, and the first surface 510 is provided with a mounting portion 41 on which a reversing holder 200 as a tool holder can be attached. The mounting portion 41 is provided with a recess 530 that is recessed from the first surface 510 and opens in one direction along the second surface 520, with the second surface 520 positioned at the bottom. The tool post 100 is further provided with a turret-side terminal 140 located on the second surface 520, which serves as a terminal that makes electrical contact with the reversing holder 200.

[0131] In this configuration, since 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, since the recess 530 is open and faces in one direction along the second surface 520, the operator can easily remove the chips that have accumulated on the second surface 520 and adhered to the turret-side terminal 140 through its open position. This prevents the tool holder 210 from being mounted on the mounting section 41 while chips are still attached to the turret-side terminal 140.

[0132] Furthermore, the tool post 100 has a plurality of mounting parts 41 arranged in the circumferential direction of the pivot central axis 110, which is a predetermined axis, and includes a swivel body 21 that can rotate around the pivot central axis 110. The one direction in which the recess 530 is opened corresponds to the axial direction of the pivot central axis 110.

[0133] With this configuration, in the turret-type tool post 100, the operator can easily remove the chips that accumulate on the second surface 520 through the open position of the recess 530, which is open in the axial direction of the pivot axis 110.

[0134] The tool post 100 also includes a lid 91 that is detachably attached to the second surface 520 and positioned in the recess 530. The lid 91 has a thickness smaller than the step between the first surface 510 and the second surface 520.

[0135] With this configuration, when a first tool holder 210S, which cannot make electrical contact with the tool post 100, is mounted on the mounting section 41, attaching the cover 91 to the second surface 520 prevents foreign matter such as chips or coolant from adhering to the turret-side terminal 140.

[0136] Furthermore, the mounting portion 41 includes a base portion 42 having a first surface 510 to which the reversing holder 200 is mounted, and a block 43 having a second surface 520 that is detachably attached to the base portion 42. The turret-side terminal 140 is provided on the block 43.

[0137] With this configuration, by attaching the block 43 to the base portion 42, the tool post can be changed from one that can only mount the first tool holder 210S to one that can selectively mount either the first tool holder 210S or the second tool holder 210T.

[0138] Furthermore, the turret-side terminal 140 includes a resin part 47 provided with a plurality of pin holes 48, and a plurality of metal pins 46, each positioned in one of the pin holes 48 and held integrally by the resin part 47. Each pin 46 has a tip portion 46a. The resin part 47 has a top surface 47a through which the plurality of pin holes 48 open. The tip portion 46a is positioned further back in the pin holes 48 than the opening surface of the pin holes 48 on the top surface 47a.

[0139] With this configuration, unintended electrical conductivity between the tip portion 46a of the pin 46 and conductive materials such as chips present in the space on the top surface 47a of the resin portion 47 can be suppressed.

[0140] The machine tool in this embodiment includes a tool post 100. With this configuration, it is possible to realize a machine tool in which chips adhering to the turret-side terminal 140 can be easily removed from the tool post 100.

[0141] [Electrical structure of tool holder (reversing holder)] Figure 17 is a block diagram showing the electrical structure of the reversing holder in Embodiment 1 of this invention.

[0142] Referring to Figure 17, the reversing holder 200 as a tool holder in this embodiment is mounted on the tool post 100 as the machine tool body and is capable of holding a tool. The reversing holder 200 includes proximity sensors 381 (381A, 381B) as sensors and / or actuators, a holder internal circuit board 410 as a board on which a first electronic circuit 721 is mounted as an electronic circuit capable of converting electrical signals from the proximity sensors 381 (381A, 381B) into serially transmittable digital signals, a holder-side terminal 220A as a serial terminal that makes electrical contact with the tool post 100 and serially transmits digital signals, and a holder-side terminal 220B as a power supply terminal that makes electrical contact with the tool post 100 and supplies power to the proximity sensors 381 (381A, 381B).

[0143] More specifically, four of the multiple pins 46 on the holder-side terminal 220A in Figure 14 are responsible for sending and receiving signals to and from the proximity sensor 381 (381A, 381B). The signals sent to the proximity sensor 381 may include signals that command the operation of the proximity sensor 381. The signals received from the proximity sensor 381 may include detection signals for locking and unlocking the swivel unit 321. The remaining pins 46 on the holder-side terminal 220A may be used for the ground of the proximity sensor 381.

[0144] Two of the multiple pins 46 on the holder-side terminal 220B are responsible for supplying power to the proximity sensor 381 (381A, 381B).

[0145] A first electronic circuit 721 is mounted on the holder substrate 410. The first electronic circuit 721 functions as an analog-to-digital (A / D) conversion circuit for converting analog electrical signals output from proximity sensors 381 (381A, 381B) into serially transmittable digital signals. The first electronic circuit 721 may also function as a circuit for converting digital electrical signals output from proximity sensors 381 into serially transmittable digital signals.

[0146] The tool post 100 includes a turret-side terminal 140A for serial transmission of digital signals and a turret-side terminal 140B for supplying power to the proximity sensors 381 (381A, 381B). When the reversing holder 200 is mounted on the tool post 100, the turret-side terminal 140A and the holder-side terminal 220A are connected to each other, forming an electrical contact for serial transmission of 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, forming an electrical contact for transmitting power from the tool post 100 to the reversing holder 200.

[0147] With this configuration, the first electronic circuit 721 on the holder's internal circuit board 410 converts the electrical signals from the proximity sensors 381 (381A, 381B) into serially transmittable digital signals, and the holder-side terminal 220A makes an electrical contact with the tool post 100, thereby serially transmitting the digital signals from the holder's internal circuit board 410 to the tool post 100. This ensures a sufficient amount of simultaneous communication between the inverting holder 200 and the tool post 100. Furthermore, the holder-side terminal 220B makes an electrical contact with the tool post 100, enabling wired power supply to the proximity sensors 381. This eliminates the need to install a battery in the inverting holder 200, thus allowing the inverting holder 200 to be miniaturized.

[0148] As a result, the inverting holder 200 can be miniaturized while ensuring sufficient communication capacity in terms of electrical usage.

[0149] The inversion holder 200 may further include a temperature sensor 911 and an acceleration sensor 912, as described in Embodiment 3. The holder's internal substrate 410 may further include a second electronic circuit 722 capable of converting an electrical signal from the temperature sensor 911 into a serially transmittable digital signal, and a third electronic circuit 723 capable of converting an electrical signal from the acceleration sensor 912 into a serially transmittable digital signal.

[0150] Referring to Figure 6, the reversing holder 200 further comprises a base portion 320 capable of holding a tool, and a block 341 that is detachably attached to the base portion 320 and is provided with holder-side terminals 220A and 220B.

[0151] With this configuration, the block 341 can be removed from the base 320, which improves the ease of cleaning or maintaining the holder-side terminals 220A and 220B.

[0152] Figure 18 is a block diagram showing a modified example of the electrical structure of the inversion holder in Figure 17. Referring to Figure 18, the inversion holder 200D in this modified example further includes an actuator 711.

[0153] Actuator 711 is a motor that rotates the swivel section 321, replacing the built-in motor 66 in Figure 3, and is built into the reversing holder 200D. The reversing holder 200D does not have a mechanism for transmitting rotation from the built-in motor 66 to the swivel section 321 (such as the rotation input key 331, shaft 332, first bevel gear 336, and second bevel gear 337 in Figure 7), but instead has a mechanism for transmitting rotation output from actuator 711 to the swivel section 321.

[0154] A fourth electronic circuit 724 is further mounted on the holder substrate 410. The fourth electronic circuit 724 functions as an analog-to-digital (A / D) conversion circuit for converting the analog electrical signal output from the actuator 711 into a digital signal that can be transmitted serially. The fourth electronic circuit 724 may also function as a circuit for converting the digital electrical signal output from the actuator 711 into a digital signal that can be transmitted serially.

[0155] The holder-side terminal 220A makes an electrical contact with the tool post 100 and is provided as a serial terminal for serially transmitting digital signals from the holder's 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.

[0156] The signals transmitted 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 encoder.

[0157] Furthermore, if the piston cylinder 361 in Figure 7 is equipped with an electromagnetic valve for controlling the airflow supplied to it, the actuator 711 may be the piston cylinder 361 equipped with the electromagnetic valve.

[0158] The machine tool body in this invention is a component of a machine tool that performs workpiece machining. The machine tool body is not limited to a tool post, but may also be, for example, a tool spindle or a table. The tool held by the tool holder in this invention is not limited to a tool for machining a workpiece, but may also be, for example, a measuring instrument (touch probe) for measuring the shape of a workpiece.

[0159] (Embodiment 2) [Electrical structure of the jig] Figure 19 is a front view showing a machine tool using the jig in Embodiment 2 of this invention. Figure 20 is a block diagram showing the electrical structure of the jig in Figure 19.

[0160] This embodiment describes a case where the electrical structure of the reversing holder 200 in Embodiment 1 is applied to a jig 800 for holding a workpiece. Therefore, the electrical structure of the jig 800 in this embodiment is basically the same as that of the reversing holder 200 in Embodiment 1. Hereafter, redundant structural descriptions will not be repeated.

[0161] Referring to Figures 19 and 20, the jig 800 in this embodiment is mounted on the tool post 100, which is a turret-type tool post, and is capable of holding the workpiece W.

[0162] The machine tool 760 is a multi-tasking machine having a tool post 100, a workpiece spindle 860, and a tool spindle (not shown). The workpiece spindle 860 holds the workpiece W. The workpiece spindle 860 rotates the workpiece W around the rotation axis 880. The workpiece W is a long body whose longitudinal direction corresponds to the axial direction of the rotation axis 880. The tool spindle (not shown) is positioned opposite the workpiece spindle 860 in the axial direction of the rotation axis 880. The workpiece W is machined by rotating the workpiece W and bringing the tool held on the tool spindle into contact with the workpiece W.

[0163] A jig 800 is mounted on the tool post 100. The jig 800 holds the workpiece W at a position away from the workpiece spindle 860 in the axial direction of the rotational axis 880. The jig 800 functions as a steady rest to prevent runout of the workpiece W.

[0164] The jig 800 includes a pair of arms 810 that hold the workpiece W with rollers, an actuator 820 that operates hydraulically to rotate the pair of arms 810 to match the diameter of the workpiece W, and a proximity sensor 830 for detecting the rotational position of the pair of arms 810.

[0165] The jig 800 has a circuit board 840 corresponding to the holder-internal circuit board 410 in Figure 17, a serial terminal 850A corresponding to the holder-side terminal 220A in Figure 17, and a power supply terminal 850B corresponding to the holder-side terminal 220B in Figure 17. A first electronic circuit 841 and a second electronic circuit 842 are mounted on the circuit board 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 transmitted serially. 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 transmitted serially.

[0166] To summarize the structure of the jig 800 in Embodiment 2 of the present invention described above, the jig 800 in this embodiment is mounted on a turret-type tool post 100 and is capable of holding a workpiece. The jig 800 includes a proximity sensor 830 and an actuator 820 as a sensor and / or actuator, a circuit board 840 on which a first electronic circuit 841 and a second electronic circuit 842 capable of converting electrical signals from the proximity sensor 830 and actuator 820 into serially transmittable digital signals, a serial terminal 850A that makes electrical contact with the tool post 100 and serially transmits digital signals, and a power supply terminal 850B that makes electrical contact with the tool post 100 and supplies power to the proximity sensor 830 and actuator 820.

[0167] The tool post 100 includes a turret-side terminal 140A for serial transmission of digital signals and a turret-side terminal 140B for supplying power to the actuator 820 and proximity sensor 830. When the jig 800 is mounted on the tool post 100, the turret-side terminal 140A and the serial terminal 850A are connected to each other, forming an electrical contact for serial transmission of digital signals between the tool post 100 and the jig 800. The turret-side terminal 140B and the power supply terminal 850B are connected to each other, forming an electrical contact for supplying power from the tool post 100 to the reversing holder 200.

[0168] With this configuration, for the same reasons as with the inversion holder 200 described above, it is possible to miniaturize the jig 800 while ensuring sufficient communication capacity in the use of electricity in the jig 800.

[0169] (Embodiment 3) [Screen display of signals from the tool holder] Figure 21 is a block diagram showing a machine tool in an embodiment of the present invention. The machine tool 900 in this embodiment includes the tool post 100 described in Embodiment 1 and a reversing holder 200. The structure of the tool post 100 and the reversing holder 200 in Embodiment 1 will not be repeated below.

[0170] Referring to Figure 21, the machine tool 900 has a proximity sensor 381, a temperature sensor 911, and an acceleration sensor 912 as sensors S.

[0171] The proximity sensor 381, temperature sensor 911, and acceleration sensor 912 are provided on the reversing holder 200. The temperature sensor 911 detects the temperature of the reversing holder 200, which rises as the workpiece is processed by the tool T. The acceleration sensor 912 detects vibrations of the reversing holder 200 that occur as the workpiece is processed by the tool T.

[0172] The type of sensor S provided on the reversing holder 200 is not particularly limited. For example, a strain sensor for detecting the cutting force generated during workpiece machining by the tool T may be provided on the reversing holder 200.

[0173] In simple terms, it is assumed that the tool post 100 has four mounting sections 41, referred to as stations 1, 2, 3, and 4. The reversing holders 200 mounted on stations 1, 2, 3, and 4 are referred to as reversing holder 200-1, reversing holder 200-2, reversing holder 200-3, and reversing holder 200-4, respectively.

[0174] The sub-numbers "-1", "-2", "-3", and "-4" assigned to the proximity sensor 381, temperature sensor 911, and acceleration sensor 912, respectively, correspond to the sub-numbers of the inversion holders 200-1, 200-2, 200-3, and 200-4, respectively. For example, temperature sensor 911-3 is the temperature sensor 911 located in the inversion holder 200-3.

[0175] The machine tool 900 further comprises a control panel 920 and an operation panel 930. The control panel 920 is a device that houses electrical control equipment and electrical equipment for controlling the machine tool 900. The operation panel 930 has an operation unit 931 that receives various operations on the machine tool 900 and a display unit 932 for displaying various information related to machining. The operation unit 931 consists of various pressable buttons, numeric keys for inputting numbers, or a dial. The display unit 932 consists of a touch panel display that can be operated by the operator and performs some of the functions of the operation unit.

[0176] The holder-internal circuit board 410 receives signals from the proximity sensor 381 (381-1,2,3,4), the temperature sensor 911 (941-1,2,3,4), and the acceleration sensor 912 (912-1,2,3,4). The holder-internal circuit board 410 receives a command to transmit sensor signals from the control panel 920, and in accordance with that command, selectively transmits a portion of the signals from the proximity sensor 381 (381-1,2,3,4), the temperature sensor 911 (941-1,2,3,4), and the acceleration sensor 912 (912-1,2,3,4) to the control panel 920.

[0177] The turret internal circuit board 420 controls the power supply to the reversing holder 200. The turret internal circuit board 420 may also be equipped with a safety circuit to protect the power supply system in the event of poor contact between the movable part 82 and the fixed part 83 of the rotary connector 81 in Figure 8, or between the turret-side terminal 140 and the holder-side terminal 220 in Figure 14.

[0178] Figure 22 is a block diagram showing the control system for screen display in the display unit shown in Figure 21. Figure 23 shows the first application screen in the display unit shown in Figure 21. Figures 24 to 26 show the second application screens in the display unit shown in Figure 21.

[0179] Referring to Figures 21 to 26, the machine tool 900 has a control device 950. Each component of the control device 950 is realized by hardware including a CPU (Central Processing Unit) and various computer processors, memory or storage devices, and wired or wireless communication lines connecting them, and software stored in the storage devices that supplies processing instructions to the processors. The computer program that constitutes the software may consist of device drivers, operating systems, various application programs located at a higher layer, or libraries that provide common functions to these programs. The computer program may be recorded on a computer-readable storage medium or on a non-transitory computer-readable storage medium. The computer program may be included in a computer program product.

[0180] The components of the control device 950 described below represent functional units. Typically, the components of the control device 950 are located in the control panel 920 and the operation panel 930.

[0181] The control device 950 controls the machine tool 900. The control device 950 includes a communication unit 960, a signal monitoring unit 966, a display control unit 970, a storage unit 980, and an operation reception unit 990.

[0182] The communication unit 960 processes the 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.

[0183] The display control unit 970 controls the image display on the display unit 932. The storage unit 980 stores signals from the proximity sensor 381, temperature sensor 911, and acceleration sensor 912. The operation reception unit 990 receives operator operations through the display unit 932, which consists of a touch panel display. The operation reception unit 990 outputs signals corresponding to the operator's operations on the display unit 932 to the communication unit 960 and / or the display control unit 970.

[0184] The first sensor group Sa is formed by the proximity sensor 381 (381-1,2,3,4), temperature sensor 911 (911-1,2,3,4), and acceleration sensor 912 (912-1,2,3,4) in the inversion holder 200 (200-1,2,3,4).

[0185] The communication unit 960 includes a transmission command unit 962 and a signal acquisition unit 961. The operator performs an operation to select a sensor S that constitutes the second sensor group Sb from among the sensors S that constitute the first sensor group Sa, via a display unit 932 which is a touch panel display. The sensors S that constitute the second sensor group Sb are a part of the sensors S that constitute the first sensor group Sa. The operation reception unit 990 receives the operator's operation on the display unit 932 and outputs a signal to the transmission command unit 962 that identifies the sensor S that constitute the second sensor group Sb.

[0186] The transmission command unit 962 outputs a transmission command to the holder board 410 for the signals of the sensors S constituting the second sensor group Sb, based on the signal from the operation reception unit 990. The holder board 410 receives the transmission command from the transmission command unit 962 and transmits the signals received from the sensors S constituting the second sensor group Sb toward the control device 950. The holder board 410 does not transmit signals from sensors S constituting the first sensor group Sa that do not constitute the second sensor group Sb toward the control device 950.

[0187] The signal transmission interval from sensor S is predetermined. The signal transmission interval from sensor S may vary depending on the type of sensor S. For example, the signal transmission interval from temperature sensor 911 may be 1 / 1000 of a second, and the signal transmission interval from proximity sensor 381 may be 1 second. The holder substrate 410 continuously transmits signals from sensor S at predetermined intervals if the sensor S is part of the second sensor group Sb, and stops transmitting signals from sensor S if the sensor S is not part of the second sensor group Sb.

[0188] The signal acquisition unit 961 acquires signals from the sensors S that constitute the second sensor group Sb, which are transmitted by the holder-internal substrate 410. The signal acquisition unit 961 outputs the acquired signals from the sensors S that constitute the second sensor group Sb to the storage unit 980, the signal monitoring unit 966, and the display control unit 970.

[0189] The storage unit 980 stores the signals of the sensors S that make up the second sensor group Sb for a predetermined time (for example, 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. If the signal monitoring unit 966 determines that the signal value of a particular sensor S exceeds that threshold, it outputs a signal indicating the occurrence of an abnormality to the display control unit 970.

[0190] The display control unit 970 includes a first image control unit 971, a second image control unit 972, and an operation image control unit 973.

[0191] As shown in Figure 23, the display unit 932 displays a first application screen 932A for setting the signal transmission conditions and storage time of the sensor S. The operation image control unit 973 in Figure 22 displays the first operation image 947 and the fourth operation image 949 on the display unit 932 (first application screen 932A).

[0192] The first operation image 947 is configured so that the operator can select a sensor S that constitutes the second sensor group Sb from among the sensors S that constitute the first sensor group Sa. More specifically, the first operation image 947 displays the items of the sensors S that constitute the first sensor group Sa as a dropdown list when operated by the operator. Each item of sensor S is provided with a checkbox that the operator can select as a sensor S that constitutes the second sensor group Sb.

[0193] The fourth operation image 949 is configured to allow setting a predetermined time for storing the signal from the sensor S in the storage unit 980. When operated by the operator, the fourth operation image 949 displays a dropdown list of candidate predetermined times. Each candidate predetermined time is provided with a checkbox that the operator can select as the predetermined time. The fourth operation image 949 may also be configured to allow the operator to directly input the predetermined time.

[0194] As shown in Figures 24 to 26, the display unit 932 displays a second application screen 932B for monitoring the signals of the sensor S. The first image control unit 971 in Figure 22 causes the first image 941, which shows the items of the sensor S constituting the second sensor group Sb, to be displayed on the display unit 932 (second application screen 932B).

[0195] The sensor S items displayed in the first image 941 are based on the selection of sensor S constituting the second sensor group Sb in the first operation image 947. In the first image 941 in Figure 25, the sensor S items constituting the second sensor group Sb are shown as "Station 1_Temperature" (corresponding to temperature sensor 911-1), "Station 2_Temperature" (corresponding to temperature sensor 911-2), "Station 3_Temperature" (corresponding to temperature sensor 911-3), "Station 4_Temperature" (corresponding to temperature sensor 911-4), and "Station 1_Proximity" (corresponding to proximity sensor 381-1). By stroking the display unit 932 downwards, the items of other sensor S constituting the second sensor group Sb are shown.

[0196] As shown in Figure 25, the operator performs an operation to select a sensor S that constitutes the third sensor group Sc from among the sensors S that constitute the second sensor group Sb, via a display unit 932 consisting of a touch panel display. The sensors S that constitute the third sensor group Sc are a part of the sensors S that constitute the second sensor group Sb. The upper limit of the number of sensors S that constitute the third sensor group Sc is predetermined, and in this embodiment, it is three.

[0197] As shown in Figure 24, the second image control unit 972 in Figure 22 displays a second image 942 on the display unit 932 (second application screen 932B), which shows a graph of the time-dependent changes in the signals of the sensors S constituting 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 displays the generated second image 942 on the display unit 932. The second image control unit 972 updates the graph display in the second image 942 each time the signal acquisition unit 961 acquires a signal from the sensors S.

[0198] In Figure 24, the upper section 942A of the second image 942 shows a graph of the time-dependent change (temperature change) of the signal for "Station 1_Temperature" (corresponding to temperature sensor 911-1), the middle section 942B of the second image 942 shows a graph of the time-dependent change (temperature change) of the signal for "Station 2_Temperature" (corresponding to temperature sensor 911-2), and the lower section 942C of the second image 942 shows a graph of the time-dependent change (temperature change) of the signal for "Station 3_Temperature" (corresponding to temperature sensor 911-3). In these graphs 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 period of time (120s) prior to the present is shown.

[0199] In Figure 22, the second image control unit 972 receives a signal from the signal monitoring unit 966 indicating that the signal value of a specific sensor S exceeds a predetermined threshold. When the second image control unit 972 receives this signal from the signal monitoring unit 966, it changes the shape of the graph corresponding to the specific sensor S in the second image 942.

[0200] In the second image 942 of Figure 24, the threshold value used to determine whether or not there is an abnormality is shown by a dotted line. The threshold value is set by the machine tool manufacturer for each type of sensor. The control device 950 may be configured so that the operator can change the threshold value. In the upper section 942A and 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 is displayed in red because the graph display has exceeded the threshold value shown by the dotted line. The form of the graph that can be changed is not limited to color, but may also be, for example, line type or line thickness.

[0201] In Figure 22, the operation image control unit 973 causes the display unit 932 to further display the third operation image 943, which is operated in the second image 942 to change the time scale of the graph.

[0202] As shown in Figure 24, the third operation image 943 consists of a bar on the horizontal axis corresponding to "time (s)". The third operation image 943 includes a point 944. The operator can adjust the time range of the graph display in the second image 942 by sliding point 944 along the horizontal axis of the bar while holding it down with their finger. For example, by moving point 944 from the left end of the bar indicating "-120s" to the center of the bar in the left-right direction, indicating "-60s", the operator can adjust the time scale (display width) on the horizontal axis to half while maintaining the temperature scale on the vertical axis.

[0203] As shown in Figures 25 and 26, the operation image control unit 973 in Figure 22 further displays the second operation image 946 (946j, 946k) on the display unit 932 (second application screen 932B).

[0204] The second operation image 946 is configured so that the operator can select a sensor S that constitutes the third sensor group Sc from among the sensors S that constitute the second sensor group Sb. The operator can select a sensor S that constitutes the third sensor group Sc using either the second operation image 946j or the second operation image 946k.

[0205] The second operation image 946j is provided as a checkbox ("Display") associated with each item of sensor S that constitutes the second sensor group Sb displayed in the first image 941, allowing the operator to select sensor S that constitute the third sensor group Sc. When the operator selects a checkbox associated with a specific sensor S, a graph showing the time-series change of the signal of the selected sensor S is displayed in the second image 942. The graph showing the time-series change of the signal of the first selected sensor S is displayed in the upper section 942A of the second image 942, the graph showing the time-series change of the signal of the next selected sensor S is displayed in the middle section 942B of the second image 942, and the graph showing the time-series change of the signal of the last selected sensor S is displayed in the lower section 942C of the second image 942.

[0206] The second operation image 946k is displayed in the upper section 942A, middle section 942B, and lower section 942C of the second image 942. When operated by the operator, the second operation image 946k displays the items of the sensors S that constitute the second sensor group Sb as a drop-down list. The operator can select the sensor S to be displayed as a graph in the upper section 942A, middle section 942B, and lower section 942C of the second image 942 from this drop-down list.

[0207] In Figure 25, the upper section 942A of the second image 942 displays the second operation image 946k, which shows the items of the sensors S that make up the second sensor group Sb as a dropdown 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).

[0208] When the operator selects "Station 1_Temperature" (corresponding to temperature sensor 911-1) from the dropdown list in the second operation image 946k, the time-dependent change (temperature change) of the signal for "Station 1_Temperature" (corresponding to temperature sensor 911-1) is displayed as a graph in the upper section 942A of the second image 942, as shown in Figure 26. At this time, the item "Station 1_Temperature" (corresponding to temperature sensor 911-1) is deleted from the first image 941.

[0209] Referring to Figures 22 and 24, the display unit 932 (second application screen 932B) is defined as having a first region Ra and a second region Rb. The second region Rb is located below the first region Ra in the display unit 932 (second application screen 932B). The second image control unit 972 displays the multiple sensing results sensed by the sensor S as the second image 942 in the first region Ra. The graphs showing the time-dependent changes in the signal of the sensor S in the second image 942 (upper section 942A, middle section 942B, lower section 942C) correspond to the multiple sensing results sensed by the sensor S.

[0210] The first image control unit 971 displays the type of sensing detected by the sensor S as the first image 941 in the second region Rb. The item for sensor S in the first image 941 corresponds to the type of sensing detected by the sensor S.

[0211] Referring to Figure 25, the second operation image 946k is in the first region Ra, and selects the sensing result to be displayed in the first region Ra. The second operation image (operation unit) 946k has the function of receiving an operation from the operator and selecting the sensing result to be displayed in the first region Ra. The second operation image 946k shows the items of sensor S as a drop-down list, and selects the sensing result of sensor S for the checked item in the drop-down list. The second operation image 946k is displayed in the first region Ra. The second operation image 946k is displayed in the upper row 942A, middle row 942B, and lower row 942C of the second image 942 displayed in the first region Ra.

[0212] The second operation image 946j is in the second region Rb and selects the sensing result to be displayed in the first region Ra. The second operation image (operation unit) 946j has the function of receiving operations from the operator and selecting the sensing result to be displayed in the first region Ra. The second operation image 946j shows checkboxes 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 checked in the checkbox. The second operation image 946k is displayed in the second region Rb. The second operation image 946k is displayed in conjunction with each item of the sensor S in the first image 941.

[0213] Referring to Figures 22, 25, and 26, the second operation image 946 (946j, 946k) receives an operation from the operator and outputs a selection signal for the sensing result to be displayed in the first region Ra to the control device 950. The operation reception unit 990 receives the selection signal from the second operation image 946. The second image control unit 972 displays the sensing result corresponding to the selection signal from the second operation image 946 in the second image 942.

[0214] In the tool post 100, the station holding the tool used for machining is positioned at a predetermined workpiece machining location by rotating the swivel body 21. Meanwhile, sensors S, such as the temperature sensor 911 and the acceleration sensor 912, are provided at the station positioned at the workpiece machining location to detect events associated with workpiece machining, such as temperature rise and vibration. In this case, the control device 950 may read the NC program to identify the sensors S placed at the station positioned at the workpiece machining location, and automatically select the identified sensors S as sensors S constituting the third sensor group Sc.

[0215] Figure 27 is a flowchart showing the flow of display control of the display unit by the control device in Figure 22.

[0216] Referring to Figures 22, 23, and 27, first the control device 950 (display control unit 970) displays the first application screen 932A on the display unit 932 (S101). In this step, the operation image control unit 973 displays the first operation image 947 on the first application screen 932A.

[0217] Next, the control device 950 (operation reception unit 990) accepts the selection of sensors that constitute the second sensor group Sb (S102).

[0218] The operator selects a sensor S that constitutes the second sensor group Sb from among the sensors S that constitute the first sensor group Sa by operating the first operation image 947. The first operation image 947 receives the operator's operation and outputs a selection signal for the sensor S that constitutes the second sensor group Sb to the control device 950. The operation reception unit 990 receives the selection signal from the first operation image 947 and outputs a signal that identifies the sensor S that constitutes the second sensor group Sb to the transmission command unit 962.

[0219] Next, the control device 950 (transmission command unit 962) outputs a transmission command to the holder-internal circuit board 410 (S103).

[0220] The transmission command unit 962 outputs a transmission command to the holder board 410 for the signals of the sensors S constituting the second sensor group Sb, based on the signal from the operation reception unit 990. The holder board 410 transmits the signals received from the sensors S constituting the second sensor group Sb to the control device 950.

[0221] Next, the control device 950 (signal acquisition unit 961) acquires signals from the sensors S that constitute the second sensor group Sb (S104). The signal acquisition unit 961 outputs the acquired signals from the sensors S that constitute the second sensor group Sb to the display control unit 970.

[0222] Referring to Figures 22, 25, and 27, the control device 950 (display control unit 970) then displays the second application screen 932B (first image 941) on the display unit 932 (S105). The first image control unit 971 displays the items of the sensors S constituting the second sensor group Sb on the second application screen 932B based on the selection signal from the first operation image 947 in step S102. The operation image control unit 973 displays the second operation image 946 (946j, 946k) on the second application screen 932B based on the selection signal from the first operation image 947 in step S102.

[0223] Next, the control device 950 (operation reception unit 990) accepts the selection of sensors that constitute the third sensor group Sc (S106).

[0224] The operator selects a sensor S that constitutes the third sensor group Sc from among the sensors S that constitute the second sensor group Sb by manipulating the second operation image 946 (946j, 946k). The second operation image 946 receives the operator's operation and outputs a selection signal for the sensor S that constitutes the third sensor group Sc to the control device 950. The operation reception unit 990 receives the selection signal from the second operation image 946 and outputs a signal that identifies the sensor S that constitutes the third sensor group Sc to the display control unit 970.

[0225] Referring to Figures 22, 24, 26, and 27, the control device 950 (display control unit 970) then displays the second image 942 on the display unit 932 (S107). Based on the selection signal from the second operation image 946, the second image control unit 972 displays a graph showing the change in the signal of the sensor S over time on the second application screen 932B.

[0226] The control panel 930 in this embodiment, as an operating device, includes a first display means (second image control unit 972) that displays a plurality of sensing results sensed by a sensor S provided on a reversing holder 200, which is a tool holder mounted on the tool post 100 and capable of holding a tool, in a first region Ra; a second display means (first image control unit 971) that displays the type of sensing sensed by a sensor S provided on a reversing holder 200, which is a tool holder mounted on the tool post 100, in a second region Rb below the first region Ra; a first selection means (second operation image 946k) in the first region Ra for selecting the sensing results to display in the first region Ra; and a second selection means (second operation image 946j) in the second region Rb for selecting the sensing results to display in the first region Ra.

[0227] With this configuration, the sensing result to be displayed in the first region Ra can be selected by checking the candidate sensing result displayed in the second region Rb based on the type of sensing detected by the sensor S, using the second operation image 946k in the first region Ra or the second operation image 946j in the second region Rb. This improves the operability of the control panel 930 when displaying an arbitrary sensing result from multiple candidates.

[0228] The control panel 930 includes a display unit 932 which defines a first region Ra and a second region Rb located below the first region Ra, and a display control unit 970 which controls the image display in the display unit 932. The display control unit 970 includes a second image control unit 972 which displays multiple sensing results sensed by a sensor S provided on a reversing holder 200 which is a tool holder that can hold a tool and is mounted on the tool post 100, in the first region Ra; a first image control unit 971 which displays the type of sensing sensed by a sensor S provided on a reversing holder 200 which is a tool holder that is mounted on the tool post 100, in the second region Rb; an operation image control unit 973k which displays a second operation image 946k which allows the user to select the sensing result to be displayed in the first region Ra, in the first region Ra; and an operation image control unit 973j which displays a second operation image 946j which allows the user to select the sensing result to be displayed in the first region Ra, in the second region Rb.

[0229] To summarize the configuration of the machine tool 900 in Embodiment 3 of the present invention described above, the machine tool 900 in this embodiment comprises a display unit 932, a reversing holder 200 as at least one tool holder mounted on the tool post 100 and capable of holding a tool, a plurality of sensors S provided on at least one reversing holder 200 and constituting a first sensor group Sa, and a control device 950. The control device 950 accepts the selection of a sensor S constituting a second sensor group Sb from among the sensors S constituting the first sensor group Sa, acquires the signal of the sensor S constituting the second sensor group Sb, and displays a first image 941 showing the items of the sensor S constituting the second sensor group Sb on the display unit 932. The control device 950 accepts the selection of a sensor S constituting a third sensor group Sc from among the sensors S constituting the second sensor group Sb, and displays a second image 942 on the display unit 932 that shows the change in the signal of the sensor S constituting the third sensor group Sc as a graph.

[0230] With this configuration, the items of the sensors S constituting the second sensor group Sb whose signals are acquired by the control device 950 can be confirmed through the first image 941, and the changes in the signals of the sensors S constituting the third sensor group Sc over time can be visually confirmed through the second image 942. In this case, the sensors S constituting the second sensor group Sb whose signals are acquired by the control device 950 are selected from among the sensors S constituting the first sensor group Sa provided in at least one inversion holder 200, and furthermore, the sensors S constituting the third sensor group Sc whose graph display in the second image 942 is selected from among the sensors S constituting the second sensor group Sb, thereby reducing the signal processing burden on the control device 950.

[0231] Furthermore, the control device 950 displays a first operation image 947 on the display unit 932, which is used to select a sensor S that constitutes the second sensor group Sb from among the sensors S that constitute the first sensor group Sa.

[0232] With this configuration, the operator can easily select a sensor S constituting the second sensor group Sb from among the sensors S constituting the first sensor group Sa by manipulating the first operation image 947.

[0233] Furthermore, the control device 950 displays a second operation image 946 on the display unit 932, which is used to select a sensor S that constitutes the third sensor group Sc from among the sensors S that constitute the second sensor group Sb.

[0234] With this configuration, the operator can easily select a sensor S constituting the third sensor group Sc from among the sensors S constituting the second sensor group Sb by manipulating the second operation image 946.

[0235] Furthermore, when the signal value of a specific sensor S exceeds a predetermined threshold, the control device 950 changes the shape of the graph corresponding to that specific sensor S in the second image 942.

[0236] With this configuration, the operator can easily recognize abnormalities in the signal value of a particular sensor S through changes in the graph's appearance in the second image 942.

[0237] Furthermore, the control device 950 causes the display unit 932 to display a third operation image 943, which is operated in the second image 942 to change the time scale of the graph.

[0238] With this configuration, the operator can easily change the time scale of the graph in the second image 942 by manipulating the third operation image 943.

[0239] (Embodiment 4) Figure 28 is a perspective view showing a machine tool. In this embodiment, a machine tool 50 equipped with the tool post 100 shown in Figure 1 will be described.

[0240] Referring to Figure 28, the machine tool 50 includes the tool post 100 in Figure 1, a workpiece spindle (not shown) for rotating the workpiece, a cover body 51, and a door 54.

[0241] The cover body 51 demarcates the machining area 56 and also forms the exterior of the machine tool 50. The machining area 56 is the space where the workpiece is machined, and the cover body 51 and door 54 seal it to prevent foreign matter such as chips or coolant generated during workpiece machining from leaking out of the machining area 56.

[0242] The cover body 51 is provided with an opening 53. 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 able to slide horizontally. By sliding the door 54, the opening 53 is opened or closed.

[0243] The tool post 100 and the workpiece spindle (not shown) are located in the machining area 56. Basically, the workpiece is machined by rotating the workpiece with the workpiece spindle and bringing the tool held in the tool post 100 into contact with the rotating workpiece.

[0244] The embodiments disclosed herein should be considered in all respects to be illustrative and not restrictive. The scope of the present invention is indicated by the claims rather than by the foregoing description, and all modifications within the meaning and scope equivalent to the claims are intended to be included. [Explanation of symbols]

[0245] 12 Base, 21 Swivel body, 32 Flange section, 32a First flange surface, 32b Second flange surface, 32p Disc section, 32q Tapered section, 34 Housing section, 35, 63 Wiring holes, 36 Cover section, 41 Mounting section, 42, 320 Base section, 43, 341 Block, 44, 44A, 44B, 346, 346A, 346B Terminal holes, 45, 552, 571, 572 Seal member, 46 Pin, 46a Tip section, 47, 221 Resin section, 47a, 91a Top surface, 48 Pin hole, 49 Pin insertion hole, 50, 760, 900 Machine tool, 51 Cover body, 53 Opening, 54 Door, 56 Machining area, 61 Support, 62 Motor housing, 66 Built-in motor, 67 Intermediate housing, 68 Bearing, 71 Cylindrical section, 81 Rotating connector, 82 Movable section, 83 Fixed section, 84 Drum, 85 Conductive band, 86 Rotating shaft, 87 Housing, 88 Brush, 91 Cover, 100 Tool post, 110, 150 Swivel center axis, 120, 160, 880 Rotation center axis, 130J Fixed side wiring, 130K Movable side wiring, 135 Wiring, 140, 140A, 140B Turret side terminals, 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 terminals, 222 Pin component, 223 Contact, 224, 366 Spring member, 225, 326 Support part, 301 Shaft part, 302 Blade part, 310 Holder body, 320c, 525 Bottom surface, 321 Swivel part, 322 Sleeve, 327 Positioning pin, 331 Rotation input key, 332 Shaft, 336 First bevel gear, 337 Second bevel gear, 337d Gear shaft, 342, 551, 562 Air holes, 361, 361A, 361B Piston cylinder, 371, 371A, 371B Locking piece, 376 Claw part, 381, 381A, 381B, 830 Proximity sensor, 410 Holder internal circuit board, 420 Turret internal circuit board, 430, 430A, 430B Intermediate connector, 431 First connector part, 432 Second connector part, 510 First surface, 520 Second surface, 530 Recess, 540 Block arrangement 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 Circuit 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 section, 942B Middle section, 942C Lower section, 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 Storage 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. It has a first surface and a second surface that is stepped with the first surface, and the first surface is provided with a mounting portion on which a tool holder can be attached. The aforementioned mounting portion includes: A recess is provided that is recessed from the first surface, open in one direction along the second surface, with the second surface positioned at the bottom, and further, A tool rest, provided on the second surface and equipped with terminals that make electrical contact with the tool holder.

2. The rotating body has a plurality of mounting parts arranged in the circumferential direction of a predetermined axis and is capable of pivoting around the predetermined axis, The tool rest according to claim 1, wherein the aforementioned one direction corresponds to the axial direction of the predetermined axis.

3. The second surface further comprises a lid that is detachably attached and positioned in the recess, The blade holder according to claim 1 or 2, wherein the lid has a thickness less than the step between the first surface and the second surface.

4. The aforementioned mounting portion is A base portion having the first surface and to which the tool holder is attached, The block includes having the second surface and being detachably attached to the base portion, The terminal is provided on the block, as described in claim 1 or 2.

5. The aforementioned terminal is A resin part having multiple pin holes, It includes a plurality of metal pins, each of which is positioned in a plurality of pin holes and held integrally by the resin part, The aforementioned pin has a tip, The resin part has a top surface through which multiple pin holes are opened. The cutting edge is positioned at a location recessed from the pin hole on the top surface, according to claim 1 or 2.

6. A machine tool comprising a tool post according to claim 1 or 2.

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