Cleaning holder and machine tool provided with the same

Abstract

To provide a cleaning holder capable of uniformly cleaning the inside of a device with high efficiency, and a machine tool provided with the same.SOLUTION: A cleaning holder 71 is used in a machine tool which includes: a tool spindle unit that includes a first spindle unit 10 having a first spindle 11 holding a workpiece W, a tool spindle 52 holding a tool holder on which a tool machining the workpiece W is mounted, and a tool spindle base 51 storing the tool spindle 52, and is moved in mutually different triaxial directions, where the tool spindle base 51 is turned around a first rotation shaft, and the tool spindle 52 is rotated around a second rotation shaft crossing the first rotation shaft; and a tool magazine 60 for storing the plurality of tool holders. The cleaning holder 71 includes a center hold 72a that is stored in the tool magazine 60, and to which a coolant is supplied, discharge holes 72b to 72h for discharging the coolant, and a tool mounting part 71g on which the tool is mounted.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a cleaning holder and a machine tool equipped with the same. [Background technology]

[0002] 2. Description of the Related Art In machine tools, in order to prevent machining defects and machine stoppages caused by the accumulation of cutting chips generated during machining, coolant is constantly run inside the machine to clean it.

[0003] Furthermore, Patent Document 1 discloses a technology for efficient cleaning in which the interior of the machine is photographed with a camera, the photographed image is analyzed, and the coolant spraying part is moved along a unidirectional rail installed at the top of the machine. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6774587 Summary of the Invention [Problem to be solved by the invention]

[0005] Methods that require constant coolant flow tend to consume large amounts of energy and coolant. In addition, there is a problem in that chips cannot be removed from areas where there is no coolant flow. To address this problem, even if the nozzle can be moved manually, the nozzle cannot be moved during machining, so chips cannot be removed sufficiently. For this reason, it is difficult to operate the machine continuously for long periods of time without human intervention.

[0006] The method disclosed in Patent Document 1 requires the installation of a dedicated rail and coolant spray unit, which increases costs. In addition, there is a problem that it is difficult to improve the efficiency of cleaning the entire interior or the desired location because the distance from the coolant spray unit to the chips is long with only a nozzle installed on a rail in one direction at the top of the machine.

[0007] The present invention has been made in consideration of the above-mentioned circumstances, and has an object to provide a cleaning holder capable of cleaning the inside of a machine tool thoroughly and with high efficiency, and a machine tool equipped with the cleaning holder. [Means for solving the problem]

[0008] In order to achieve the above-mentioned object, a cleaning holder according to a first aspect of the present invention is a cleaning holder used in a machine tool comprising a tool spindle unit having a spindle that holds a workpiece, a tool spindle that holds a tool holder to which a tool for machining the workpiece is attached, and a tool spindle stock that houses the tool spindle, the tool spindle unit moving in three axial directions facing different directions, the tool spindle stock rotating about a first rotation axis, and the tool spindle rotating about a second rotation axis intersecting the first rotation axis, and a tool magazine that houses a plurality of the tool holders, the cleaning holder being housed in the tool magazine and comprising a coolant inlet through which coolant is supplied, a coolant discharge hole from which the coolant is discharged, and a tool attachment portion to which the tool is attached.

[0009] In order to achieve the above object, a machine tool according to a second aspect of the present invention includes the above cleaning holder. Effect of the Invention

[0010] According to the present invention, the inside of a machine tool can be cleaned thoroughly and efficiently. [Brief description of the drawings]

[0011] [Figure 1] 1 is a front view of a machine tool according to a first embodiment of the present invention. [Diagram 2] 1 is a plan view of a machine tool according to a first embodiment of the present invention. [Diagram 3] 2 is a view taken along the arrow A1 in FIG. 1, and is a side view of a tool spindle unit, a guide bush device, a tool rest, etc. according to the first embodiment of the present invention. [Figure 4]2 is a view taken along the arrow A2 in FIG. 1, and is a side view of a tool magazine, a second spindle unit, etc. according to the first embodiment of the present invention. [Diagram 5] 1A is a diagram showing a tool spindle unit and a tool headstock moving mechanism of a machine tool according to a first embodiment of the present invention, and FIG. 1B is a view taken along the arrow A3 in FIG. 1A, and is a partial cross-sectional view showing a coolant flow passage. [Figure 6] FIG. 2 is a partially enlarged cross-sectional view showing a coolant flow passage of the machine tool according to the first embodiment of the present invention. [Figure 7] FIG. 1A is a view showing a cleaning tool unit of a machine tool according to a first embodiment of the present invention, FIG. 1B is a view taken along the line A4 in FIG. 1A and is a partial cross-sectional view showing a coolant hole, and FIG. 1C is a view taken along the line A5 in FIG. 1A. [Figure 8] 7(a) is a view taken along the arrow A6 in FIG. 7(a), which shows a cleaning tool unit of a machine tool according to a first embodiment of the present invention, (b) is a view taken along the arrow A7 in FIG. 7(a), and (c) is a view taken along the arrow A8 in FIG. [Figure 9] FIG. 1 is a front view showing a machining chamber in a machine tool according to a first embodiment and a second embodiment of the present invention. [Figure 10] FIG. 1 is a plan view showing a machining chamber in a machine tool according to a first embodiment and a second embodiment of the present invention. [Figure 11] FIG. 5 is a block diagram showing a configuration of a machine tool according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] (First embodiment) A machine tool according to a first embodiment of the present invention will be described below with reference to the drawings. First, an example of the basic configuration and operation of the machine tool 1 will be described with reference to Figs. 1 to 4, and then the configuration and operation of the machining chamber 100 and cleaning of the inside of the machining chamber 100 will be described with reference to Figs. 5 to 9. Below, appropriate configurations will be described using orthogonal X, Y, and Z axes as indicated by arrows in the figures. In addition, in each direction indicated by these arrows, the direction in which the arrow points is the "+" side, and the opposite direction is the "-" side.

[0013] As shown in FIG. 1, the machine tool 1, which is a turning center, comprises a bed S which is a base for the entire machine tool 1, a first spindle unit 10 having a first spindle 11, a second spindle unit 20 having a second spindle 21, a first spindle moving mechanism 13Z, a second spindle moving mechanism 25, a tool spindle unit 50, a tool spindle moving mechanism 42, a magazine support member 16, a moving mechanism support member 14, a guide bush support portion 15, a tool magazine 60, a machining chamber 100, a control portion 300, and, as shown in FIG. 2, a tool spindle rotation mechanism 45, a tool rest 30, and a tool rest moving mechanism 33Y.

[0014] The machine tool 1 is a machine for machining a bar stock, that is, a workpiece W. This bar stock is, for example, a cylindrical material having a diameter of about 40 mm. In the following, the axial direction of the rotation axes of the first main spindle 11 and the second main spindle 21 is defined as the Z-axis direction, the height direction perpendicular to the Z-axis direction is defined as the Y-axis direction, and the depth direction perpendicular to the Y-axis and Z-axis directions is defined as the X-axis direction. In this example, the X-axis and Z-axis directions are horizontal.

[0015] 1 holds a workpiece W and rotates it about the central axis of the workpiece W as a rotation axis. Specifically, the first spindle unit 10 includes a first spindle 11, a first spindle stock 12 that rotatably supports the first spindle 11, and a first workpiece holding portion 11a that rotates together with the first spindle 11 and holds an end portion of the workpiece W. A workpiece rotating motor (not shown) that rotates the first spindle 11 is built into the first spindle stock 12. The first workpiece holding portion 11a is a collet chuck that can grasp the workpiece W from its outer periphery.

[0016] The movement mechanism support member 14 is installed on the upper surface of the bed S, and supports the first spindle movement mechanism 13Z. The first spindle movement mechanism 13Z moves the first spindle unit 10 in the Z-axis direction.

[0017] A guide bush device 90 is removably attached to the guide bush support portion 15. The guide bush support portion 15 is fixed to the upper surface of the movement mechanism support member 14 on the side closer to the second spindle unit 20.

[0018] The guide bush device 90 is fastened to the guide bush support portion 15 by a fastening member such as a bolt. The guide bush device 90 is located on the tip side of the first spindle unit 10 (the side closer to the second spindle unit 20) and supports the outer periphery of the workpiece W held by the first spindle unit 10. A portion of the workpiece W protruding from the guide bush device 90 to the opposite side of the first spindle 11 is machined by the cleaning tool unit 70 or the tool unit 80 attached to the tool spindle unit 50. By the guide bush device 90 supporting the workpiece W, deflection or vibration of the workpiece W during machining is suppressed even for a long workpiece W.

[0019] The guide bush device 90 can be selectively attached to and detached from the guide bush support portion 15. For example, when machining a short workpiece W, the operator selects a state in which the guide bush device 90 is not attached to the guide bush support portion 15. On the other hand, when machining a long workpiece W, the operator selects a state in which the guide bush device 90 is attached to the guide bush support portion 15. The guide bushing device 90 may be of any type, such as a direct drive guide bushing device, a stationary guide bushing device, a Kelle type rotating guide bushing device, or a belt drive guide bushing device.

[0020] The second spindle unit 20 shown in FIG. 1 is provided at a position facing the first spindle unit 10 in the Z-axis direction. The second spindle unit 20 holds a workpiece W and rotates it about the central axis of the workpiece W as a rotation axis. The second spindle unit 20 includes a second spindle 21, a second spindle stock 22 that rotatably supports the second spindle 21, and a second workpiece holding portion 21a that rotates together with the second spindle 21 and holds an end portion of the workpiece W. A workpiece rotating motor (not shown) that rotates the second spindle 21 is built into the second spindle stock 22. The second workpiece holding portion 21a is a collet chuck that can grasp the workpiece W from its outer periphery.

[0021] 2, the second spindle moving mechanism 25 moves the second spindle unit 20 in the X-axis direction and the Z-axis direction, which are horizontal directions. The second spindle moving mechanism 25 includes a pair of rails 25R provided on the bed S, a slide base 25S, an X-movement mechanism 25X that moves the second spindle unit 20 in the X-axis direction, and a Z-movement mechanism 25Z that moves the second spindle unit 20 in the Z-axis direction.

[0022] As shown in FIG. 2, the second spindle moving mechanism 25 is disposed on the installation surface (upper surface) of the bed S in an area facing in the Z-axis direction with respect to the first spindle unit 10 and the tool rest 30, which are arranged in the X-axis direction. The second spindle moving mechanism 25 can move the second spindle unit 20 in the X-axis and Z-axis directions between a position where the workpiece W can be transferred between the second spindle unit 20 and the first spindle unit 10, and a position where the workpiece W can be machined by the tool 35 on the tool post 30.

[0023] The slide base 25S supports the second spindle unit 20. The second spindle unit 20 moves in the Z-axis direction by a Z movement mechanism 25Z attached to the slide base 25S. In addition, the slide base 25S moves in the X-axis direction on the rail 25R by an X movement mechanism 25X provided on the bed S.

[0024] As shown in FIGS. 1 and 2, the tool spindle moving mechanism 42 includes a rail 42R, a slide base 42S, an X moving mechanism 42X that moves the tool spindle unit 50 in the X-axis direction, a Y moving mechanism 42Y that moves the tool spindle unit 50 in the Y-axis direction, and a Z moving mechanism 42Z that moves the tool spindle unit 50 in the Z-axis direction.

[0025] The tool spindle moving mechanism 42 is located on the upper surface of the bed S in the +X direction relative to the first spindle unit 10, the first spindle moving mechanism 13Z, the second spindle unit 20, the second spindle moving mechanism 25 and the tool rest 30.

[0026] The pair of rails 42R are provided on the bed S at a fixed interval in the X-axis direction, and each extends in the Z-axis direction.

[0027] The slide base 42S is disposed on the rail 42R and supports the tool headstock moving mechanism 42. The tool headstock moving mechanism 42 moves in the X-axis direction by an X-moving mechanism 42X attached to the slide base 42S. In addition, the slide base 42S moves in the Z-axis direction on the rail 42R by a Z-moving mechanism 42Z provided on the bed S.

[0028] 2, the bed S has a substantially rectangular shape when viewed from the Y-axis direction, with one of four corners being recessed to form a recess Sk. The recess Sk of the bed S is located on an extension line of the rail 42R. The length in the Z-axis direction of the region on the top surface of the bed S where the tool spindle moving mechanism 42 is located is shorter than the length in the Z-axis direction of the region on the top surface of the bed S where the first spindle moving mechanism 13Z and the second spindle moving mechanism 25 are located.

[0029] 2 moves the tool rest 30 in the Y-axis direction. The tool rest moving mechanism 33Y is located on the upper surface of the bed S, to the side of the guide bush device 90 in the X-axis direction, and in the -X direction from the guide bush device 90.

[0030] The first spindle movement mechanism 13Z, the X movement mechanisms 25X, 42X, the Y movement mechanism 42Y, the Z movement mechanisms 25Z, 42Z, and the tool rest movement mechanism 33Y each have a motor, a ball screw, and a nut. The rotational force of the motor is converted into linear motion by the ball screw and the nut, whereby the corresponding first spindle unit 10, second spindle unit 20, tool spindle unit 50, or tool rest 30 moves linearly.

[0031] As shown in FIGS. 1 and 3, the tool headstock turning mechanism 45 turns the cleaning tool unit 70 or the tool unit 80 attached to the tool spindle unit 50 about a central rotation axis J in the X-axis direction.

[0032] 1 and 4, the tool magazine 60 houses a tool unit 80 including a tool holder and multiple types of tools, and a cleaning tool unit 70, and transfers the cleaning tool unit 70 or the tool unit 80 between the tool magazine 60 and the tool spindle unit 50. The tool unit 80 is a fixed tool such as a turning tool, or multiple types of rotating tools such as a milling tool. The cleaning tool unit 70 will be described later. The tool magazine 60 is located above the first spindle 11 when the first spindle 11 is closest to the guide bush device 90. The tool magazine 60 is supported by a magazine support member 16. The magazine support member 16 is formed as a support frame extending in the Y-axis direction, and is fixed to the top surface of the bed S on the rear side of the first spindle unit 10.

[0033] The tool magazine 60 includes a tool support portion 61 and a drive portion 62 . The tool support portion 61 has a substantially circular ring shape and is supported rotatably about a rotation axis Az that extends in the Z-axis direction. 4, the tool support part 61 includes a plurality of tool gripping parts 61a. The plurality of tool gripping parts 61a are located on the outer periphery of the tool support part 61 and are arranged to be aligned in the rotation direction of the tool support part 61. Each tool gripping part 61a has a U-shaped groove that opens toward the radial outside of the tool support part 61, and holds the tool unit 80 or the cleaning tool unit 70 by fitting the tool unit 80 or the cleaning tool unit 70 into this groove. The tool gripping part 61a holds the tool unit 80 or the cleaning tool unit 70 so that it faces the Z-axis direction. 1 has a motor, and rotates the tool support part 61 about a rotation axis Az. The drive part 62 is supported by the magazine support member 16.

[0034] 1, a tool unit 80 or a cleaning tool unit 70 is detachably attached to the tool spindle unit 50. The tool spindle unit 50 is located between the first spindle unit 10 and the second spindle unit 20 in the Z-axis direction. The tool spindle unit 50 uses the attached tool unit 80 or cleaning tool unit 70 to machine a workpiece W held by the first spindle unit 10 or the second spindle unit 20, and also cleans the inside of the machine using a cleaning holder 71, which will be described later.

[0035] The tool rest 30 shown in Fig. 3 is configured so that a plurality of tools 35 for machining the workpiece W held by the second spindle unit 20 can be attached to it. The plurality of tools 35 can be attached to the tool rest 30 so as to be aligned linearly in each of the Y-axis direction and the X-axis direction. In this example, a total of six tools 35 can be attached to the tool rest 30, three in the Y-axis direction and two in the X-axis direction. The plurality of tools 35 include rotating tools and fixed tools. The cutting edges of the tools 35 attached to the tool rest 30 are provided so as to face the second spindle movement mechanism 25.

[0036] 2, the tool rest 30 and the tool 35 are located in an area on the upper surface of the bed S, opposite in the X-axis direction to an area in which the tool spindle moving mechanism 42 is located with respect to the first spindle 11 or the guide bush unit 90. The tool rest 30 and the tool 35 are located on the front side of the first spindle 11 or the guide bush unit 90. The tool rest 30 includes a drive unit 31 and a gear train (not shown) that transmits the drive force of the drive unit 31 to the tool 35 (rotating tool) as a rotational force. The drive unit 31 and the gear train may be omitted.

[0037] The machining chamber 100 shown in FIGS. 1 to 3 encloses the workpiece W, the tool spindle unit 50, and the guide bush device 90, the second spindle unit 20, the tool rest 30, and part of the tool headstock rotating mechanism 45 located around them.

[0038] 1 controls the first spindle unit 10, the second spindle unit 20, the first spindle movement mechanism 13Z, the second spindle movement mechanism 25, the tool rest 30, the tool rest movement mechanism 33Y, the tool spindle unit 50, the tool spindle movement mechanism 42, the tool spindle stock turning mechanism 45, the tool magazine 60, etc. The control unit 300 includes a CPU (Central Processing Unit) (not shown), a ROM (Read Only Memory) that stores a program that defines the procedure of processing by the CPU, etc.

[0039] As shown in FIG. 1, the control unit 300 controls the swivel angle of the tool spindle unit 50 about the rotation central axis J. This swivel angle is an angle formed by an axis line extending downward in the Y-axis direction with the rotation central axis J as an end point and an axis line extending from the rotation central axis J of the tool spindle stock swivel mechanism 45 toward the cutting edge of the cleaning tool unit 70. The side of the swivel angle where the cutting edge of the tool faces the second spindle unit 20 is a positive angle, and the side of the swivel angle where the cutting edge of the tool faces the first spindle unit 10 is a negative angle. When this swivel angle is +90°, the attached tool unit 80 or cleaning tool unit 70 faces the Z-axis direction, and the end face of the workpiece W held by the second spindle unit 20 can be machined by the tool. On the other hand, when this swivel angle is -90°, the attached tool unit 80 or cleaning tool unit 70 faces the Z-axis direction, and the end face of the workpiece W held by the first spindle unit 10 can be machined by the tool. When the rotation angle is −90°, the tool unit 80 or the cleaning tool unit 70 can be transferred between the tool magazine 60 and the tool holder 62 . When performing the first or second machining described below, the control unit 300 can adjust the direction in which the cutting edge of the tool enters with respect to the axial direction of the workpiece W by controlling the rotation angle of the tool spindle unit 50.

[0040] Next, a description will be given of an example of processing executed by the control unit 300. The control unit 300 executes this processing in accordance with an NC (Numerical Control) program created in advance. First, the control unit 300 performs a first machining process on the workpiece W held by the first spindle unit 10 using the tool unit 80 or cleaning tool unit 70 attached to the tool spindle unit 50. When performing this first machining process, the control unit 300 retracts the second spindle unit 20 in the -X direction to create a space for the tool unit 80 or cleaning tool unit 70 to machine the workpiece W held by the first spindle unit 10.

[0041] Next, the control unit 300 moves the second spindle 21 via the second spindle moving mechanism 25 to a position facing the first spindle 11, and transfers the workpiece W from the first spindle 11 to the second spindle 21. Then, the control unit 300 performs a second machining of the workpiece W held by the second spindle unit 20 using the tool 35 attached to the tool rest 30, or the tool unit 80 or cleaning tool unit 70 attached to the tool spindle unit 50. For example, in this second machining, the control unit 300 moves the workpiece W together with the second spindle 21 and machines the workpiece W using the cleaning tool unit 70 attached to the tool spindle unit 50, and then further moves the workpiece W together with the second spindle 21 and machines the workpiece W using the tool 35 on the tool rest 30. Thereafter, the workpiece W is discharged by a work discharge unit (not shown). This completes the processing. This processing is repeatedly performed every time a workpiece W is supplied.

[0042] As the above-mentioned first processing, turning processing, milling processing, or the like is performed. When turning is performed, a cutting tool bit is attached in advance to the tool unit 80 or cleaning tool unit 70 of the tool spindle unit 50 as a cutting tool. In this state, the control unit 300 rotates the first spindle 11 together with the workpiece W, causes the cutting tool to cut into the outer circumferential surface of the workpiece W with the cutting edge, and feeds the cutting tool in the Z-axis direction relative to the workpiece W via the tool spindle moving mechanism 42 or the first spindle moving mechanism 13Z. This cuts the outer circumferential surface of the workpiece W. When cutting a long workpiece W, the workpiece W is supported by the guide bush device 90, thereby improving the machining accuracy of the long workpiece W.

[0043] Thereafter, when milling is performed, a rotating tool is attached to the tool spindle unit 50 by tool exchange between the tool spindle unit 50 and the tool magazine 60. In this state, the control unit 300 rotates the rotating tool via the tool spindle unit 50 while moving the rotating tool via the tool spindle moving mechanism 42, so that the cutting edge of the rotating tool cuts into the outer circumferential surface or end surface of the workpiece W. At this time, the control unit 300 can adjust the direction in which the cutting edge of the rotating tool enters with respect to the axial direction of the workpiece W by controlling the rotation angle of the tool spindle unit 50.

[0044] In the above-mentioned second machining, similarly to the above-mentioned first machining, turning or milling is performed on the workpiece W held by the second spindle unit 20 with the tool of the tool spindle unit 50. As a second machining process different from the second machining process by the tool of the tool spindle unit 50, turning or milling is performed by the tool 35 of the tool rest 30. When performing turning or milling, for example, the control unit 300 moves the tool 35 relatively to the workpiece W via the X-movement mechanism 25X or the Z-movement mechanism 25Z while contacting the cutting edge of the tool 35 of the tool rest 30 with the workpiece W held by the second spindle unit 20 while rotating the second spindle 21 or the tool 35.

[0045] Furthermore, in the above-mentioned machining process, the control unit 300 may perform a first machining operation on the workpiece W held by the first spindle unit 10 using a tool of the tool spindle unit 50, simultaneously with a second machining operation on the workpiece W held by the second spindle unit 20 using the tool 35 of the tool post 30. Hereinafter, the operation of the machine tool 1 when the first and second machining processes are performed simultaneously will be described. For example, the control unit 300 moves the second spindle unit 20 via the second spindle moving mechanism 25, and the second spindle unit 20 receives the workpiece W on which the first machining has been completed from the first spindle unit 10. Then, as the second machining, the workpiece W held by the second spindle unit 20 is machined by the tool of the tool spindle unit 50. Thereafter, the control unit 300 moves the workpiece W held by the second spindle unit 20 to a machining position via the second spindle moving mechanism 25, and as the second machining, the end face of the workpiece W held by the second spindle unit 20 is machined by the tool 35 of the tool rest 30. At the same time, the control unit 300 uses the space freed by the movement of the second spindle unit 20 to perform the first machining on the workpiece W held by the first spindle unit 10 with the tool of the tool spindle unit 50. In this way, by at least partially overlapping the time of the first machining and the time of the second machining, the cycle time, which is the time required to machine one workpiece W, can be shortened.

[0046] Next, a tool exchange process for exchanging the type of tool used in the tool spindle unit 50 will be described. This tool exchange process is executed during the above-mentioned machining process, for example, between the turning process and the milling process, or between the first machining process and the second machining process. Note that, although the tool unit 80 is used as an example here, the cleaning tool unit 70 may also be used.

[0047] First, as shown in FIG. 1, the control unit 300 rotates the tool support part 61 via the drive unit 62, and rotates the tool gripping part 61a of the tool support part 61, to which the tool unit 80 is not attached, to the tool change position Pc (see FIG. 4). Next, the control unit 300 rotates the turning angle of the tool unit 80 attached to the tool spindle unit 50 via the tool headstock turning mechanism 45 to -90°, and faces the cutting edge of the tool of the tool unit 80 toward the tool magazine 60. Then, the control unit 300 moves the tool spindle unit 50 so that the tool gripping portion 61a of the tool support portion 61 grips the tool holder of the tool unit 80. Then, the tool spindle unit 50 releases the state in which the tool unit 80 is clamped, and the tool spindle unit 50 is separated from the tool support portion 61. As a result, the tool unit 80 is removed from the tool spindle unit 50.

[0048] Next, the control unit 300 rotates the tool support unit 61 to rotate the tool unit 80 to be used in the next machining to the tool change position Pc. Then, the control unit 300 moves the tool spindle unit 50 to attach the tool unit 80 located at the tool change position Pc to the tool spindle unit 50, and clamps the tool unit 80 by the tool spindle unit 50. Then, the control unit 300 moves the tool spindle unit 50 away from the tool support unit 61, and finally, rotates the tool unit 80 attached to the tool spindle unit 50 so that it faces the workpiece W. This completes the tool change process.

[0049] Next, the configuration of the machining chamber 100 and cleaning of the inside of the machining chamber 100 (inside the machine) will be described. First, with reference to Fig. 5 to Fig. 8, the configuration of the cleaning tool unit 70 provided in the tool spindle unit 50 and having a cleaning function using coolant, and the coolant flow path will be described. Note that in the following description, it is assumed that the cleaning tool unit 70 is located in the -Y direction from the tool holder attachment portion 56 of the tool spindle unit 50 as shown in Fig. 1.

[0050] 5, a pipe connection part 42b is provided behind (in the +X direction) the column 42a of the tool spindle moving mechanism 42. The pipe connection part 42b is provided with a coolant supply port 42c for connecting to a pipe from an external high-pressure pump X.

[0051] A coolant flow passage 42d is formed in the coolant supply port 42c, which passes through the piping connection part 42b, the tool headstock rotating mechanism 45, and the inside of the tool headstock mounting base 58, and continues to the upper inside of the tool headstock 51 of the tool spindle unit 50. In addition, in Figs. 5 and 6, the coolant flow passage 42d and the components that configure the other flow passages are hatched around the flow passages to make the drawings easier to see.

[0052] 6, tool spindle unit 50 includes tool spindle stock 51, tool spindle 52, rotary joint 53, drawbar 54, tool gripping mechanism 55, tool holder attachment portion 56, and tool spindle rotation mechanism 57. A part of rotary joint 53, drawbar 54, tool gripping mechanism 55, and tool holder attachment portion 56 form a rotating body. This rotating body passes through the center of the entire tool spindle unit 50 and rotates together with tool spindle 52. As shown in FIGS. 7(a) to (c) and 8(a) to (c), the cleaning tool unit 70 includes a cleaning holder 71, a cutting tool 73, and a set screw 74.

[0053] The tool headstock 51 is attached to the tool headstock swivel mechanism 45 so as to be rotatable about a central rotation axis J, and accommodates various components such as the tool spindle 52. The tool spindle 52 supports the cleaning tool unit 70 so as to be rotatable about a central rotation axis Jh.

[0054] The rotary joint 53 is a piping joint that supplies the coolant flowing through the coolant flow passage 42d to the rotating body of the tool spindle unit 50. An upper fixed portion of the rotary joint 53 is connected to the coolant flow passage 42d.

[0055] The upper end of the drawbar 54 is connected to a rotating portion below the rotary joint 53, and coolant flows through a central hole 54a provided in the drawbar 54. A piston portion (not shown) is also connected to the upper end of the drawbar 54, and the piston portion enables the drawbar 54 to move in the Y-axis direction.

[0056] The tool gripping mechanism 55 includes a main body 55a, a clamp portion 55b, and a center hole 55c.

[0057] The upper end of the main body 55a is connected to the lower end of the draw bar 54, and the coolant flows through a center hole 55c provided in the main body 55a. The main body 55a moves in the Y-axis direction in accordance with the movement of the draw bar 54. In addition, a clamp portion 55b is attached to the lower end of the main body 55a.

[0058] The clamp portion 55b is disposed around the rotation axis of the main body portion 55a and has a plurality of claws that open and close radially in response to movement of the main body portion 55a in the Y-axis direction. The tips of the claws come into contact with the inner diameter portion of the recess 71i at the upper end portion of the cleaning holder 71. When the draw bar 54 moves upward, the tool gripping mechanism 55 also moves upward in conjunction with the tool holder attachment part 56, and the clamp part 55b clamps the cleaning holder 71 between the tool holder attachment part 56 and the tool holder gripping mechanism 55. When the draw bar 54 moves downward, the cleaning holder 71 is put into an unclamped state.

[0059] The tool holder attachment portion 56 is attached to the lower end portion of the tool spindle 52. The tool holder attachment portion 56 is provided with a central hole 56a into which the third portion 71c shown in Figures 7(a) to (c) is inserted.

[0060] The tool spindle rotating mechanism 57 includes a motor (not shown) and rotates the tool spindle 52 about a central rotation axis Jh.

[0061] The cleaning holder 71 is formed in three stages, from the bottom up, of a first section 71a, a second section 71b, and a third section 71c. The first section 71a has the largest outer diameter, and the second section 71b and the third section 71c have smaller outer diameters in that order.

[0062] The first portion 71a includes a flat portion 71d and a flat portion 71e, which are two parallel flat surfaces formed on the outer diameter portion of a cylindrical shape. A tapered surface portion 71f is formed at the lower end of the flat portion 71d, and the tapered surface continues from the edge of the flat portion 71d toward the center of the first portion 71a. The second portion 71b is a portion that is gripped by the tool gripping portion 61a of the tool magazine 60. The third portion 71c is a portion that is inserted into the tool holder attachment portion 56. As shown in Fig. 7(c) , when viewed from the axial direction of the cleaning holder 71, the third portion 71c is formed in a triangular shape with three rounded sides and three rounded apexes. By pulling the tool gripping mechanism 55 with the drawbar 54, the cleaning holder 71 is restrained on two surfaces: the outer periphery of the third portion 71c and the axial end faces of the stepped portion between the second portion 71b and the third portion 71c. The cleaning holder 71 also includes a groove-shaped tool attachment portion 71g for accommodating a cutting tool 73, and a plurality of screw holes 71h.

[0063] The cleaning holder 71 is provided with a coolant hole portion 72 having a central hole 72a including a coolant inlet through which coolant flows in from the central hole 55c of the tool gripping mechanism portion 55, and discharge holes 72b to 72h through which the coolant from the central hole 72a is discharged to the outside of the cleaning holder 71.

[0064] As shown in Fig. 7(a), the discharge holes 72b to 72h are arranged in order from the top to the center of the flat surface portion 71d and the tapered surface portion 71f. Also, as shown in Fig. 7(b), the central axes of the discharge holes 72b to 72h are arranged equiangularly above and below from a single point on the central axis of the central hole 72a.

[0065] The outlets of discharge holes 72b to 72d are located in flat surface portion 71d. The outlet of discharge hole 72e is located at the boundary between flat surface portion 71d and tapered surface portion 71f. The outlets of discharge holes 72f to 72g are located in tapered surface portion 71f. And the outlet of discharge hole 72h is located at the boundary between tapered surface portion 71f and the lower end surface of cleaning holder 71.

[0066] 8(a) to 8(c), the cleaning holder 71 is provided with a tool attachment portion 71g to which a cutting tool 73 is attached. The tool attachment portion 71g is formed in a groove shape extending vertically with a part of a flat portion 71e being opened. The cleaning holder 71 is also provided with a plurality of screw holes 71h for attaching set screws 74 that fix the cutting tool 73 attached to the tool attachment portion 71g by pressing it laterally against one surface in the tool attachment portion 71g.

[0067] The cutting tool 73 includes a tool body 73a that is attached to the tool attachment portion 71g of the cleaning holder 71, and a processing tip 73b that is attached to a corner portion on the tip side of the tool body 73a.

[0068] The tool body 73a is formed in a generally elongated rectangular prism shape, and the machining tip 73b formed in a parallelogram shape as shown in FIG. 8(a) is attached to a corner portion near the central axis of the cleaning holder 71. As shown in FIGS. 8(a) to (c), a protrusion 73c protrudes from the tip of the tool body 73a toward the cutting edge of the machining tip 73b at the corner portion. This protrusion 73c allows only a small portion of the cutting edge of the machining tip 73b to protrude from the tool body 73a. In this embodiment, a square cutting tool is used as the machining tip 73b.

[0069] As shown in FIG. 8(b), the set screw 74 is inserted into a threaded hole 71h of the cleaning holder 71 to press the tool body 73a against the wall of the first portion 71a.

[0070] Next, the configuration of the processing chamber 100 and cleaning of the inside of the processing chamber 100 with the coolant discharged from the cleaning holder 71 will be described with reference to Fig. 9. Note that, except for the above-mentioned components, illustrations of the components described below are omitted in Figs. 1 to 8 to facilitate understanding of the basic configuration.

[0071] The processing chamber 100 includes wall members 101-103 that are covers surrounding a processing space and are disposed on a bed S, a ceiling member 104 disposed above the wall members 101-103, and a door 105 that can be opened and closed by an operator. Note that the camera 106 shown in Fig. 9 is the same as that in the second embodiment, and in this embodiment, the processing chamber 100 does not include the camera 106.

[0072] Within the machining chamber 100, the guide bush device 90 on the first spindle unit 10 side, the second spindle unit 20, and parts of the tool rest 30, as well as the tool spindle unit 50, etc. are arranged, and the workpiece W is machined within the machining chamber 100.

[0073] The door 105 is provided with a window 107 through which an operator can visually view the inside of the processing chamber 100. In addition, the wall member 103 is provided with an openable and closable tool replacement door 108 for replacing the cleaning tool unit 70 at the tool replacement position Pc. In addition, a transparent window or a lighting device (not shown) can be provided at any position on the ceiling member 104, etc.

[0074] 9 and 10, in the second spindle unit 20, in addition to a cover 111 that covers the second spindle stock 22, covers 112, 113, and 114, which are expandable covers, cover various parts of the second spindle unit 20. After cutting processing by the cutting tool 73, the covers 111 to 114 have areas C1 to C4 where chips have accumulated.

[0075] The tool spindle unit 50 is moved in each of the three orthogonal axes, that is, the X-axis, the Y-axis, and the Z-axis, by the tool spindle moving mechanism 42 described above. Further, the tool headstock 51 is rotated around the rotation central axis J by the tool headstock rotating mechanism 45 (rotation angle RJ), and the cleaning tool unit 70 is rotated around the rotation central axis Jh by the tool spindle rotating mechanism 57 (rotation angle RJh). The rotation range of the tool headstock 51 around the rotation central axis J can exceed 180°.

[0076] By discharging coolant from the discharge holes 72b-72h of the cleaning holder 71 while moving, turning or rotating as described above, the inside of the machining chamber 100, including the areas C1-C4 on the covers 112-114 where chips have accumulated, is efficiently and evenly cleaned. The illustrated cleaning positions are merely examples, and may be different positions, or may move, turn, or rotate over a wider range. For example, the tool spindle unit 50 may move to any position on the X-axis, Y-axis, and Z-axis in the machining chamber 100, and then discharge the coolant while remaining stationary. Also, the coolant may be discharged while one or more of the movements and turns of the tool spindle unit 50 and the rotation of the cleaning tool unit 70 are performed. With the above configuration and operation, the machine tool 1 can efficiently and evenly clean each part in the machining chamber 100.

[0077] Second embodiment The machine tool 1 of the second embodiment differs from the first embodiment in that it is provided with a camera 106 that captures images of the inside of the machining chamber 100, and determines the operation of the tool spindle unit 50 by analyzing the accumulation state of chips from the images captured by the camera 106. The configuration of the second embodiment will be described below with reference to FIG. 11 in addition to FIGS. 9 to 10.

[0078] A camera 106 shown in FIG. 9 is attached to the center of a ceiling member 104 so as to capture images of the guide bush device 90, the second spindle unit 20, the tool spindle unit 50, and the like below.

[0079] As shown in FIG. 11, the control unit 300 includes an image processing unit 310, a deposition state analysis unit 320, a program generation unit 330, a program execution unit 340, and a storage unit 350.

[0080] The image processing unit 310 processes the data output from the camera 106 and converts it into image data.

[0081] The accumulation state analysis unit 320 divides the imaging area below the camera 106 shown in Fig. 9 into small areas and detects the presence or absence of chips in each area. By combining the detection results for each area, in the example shown in Fig. 10, the areas C1 to C4 where chips are accumulated, the accumulation amounts, etc. are detected.

[0082] Furthermore, the accumulation state analyzing unit 320 determines the steps of movement, turning and rotation of the tool spindle unit 50 based on the results of chip detection. In cleaning the inside of the machining chamber 100, the movement route of the tool spindle unit 50 and the turning and rotation of the tool spindle unit 50 for each movement point can be determined in advance. By determining the route in advance, the inside of the machining chamber 100 can be cleaned thoroughly. However, in practice, it is often sufficient to focus on cleaning the areas where chips are concentrated, so by making the operation of the tool spindle unit 50 more efficient, the cleaning time can be shortened and the areas C1 to C4 where chips have accumulated can be removed.

[0083] For example, a cleaning origin Pw0 shown in Figures 9 and 10 is set. Then, the tool spindle unit 50 is moved from the cleaning origin Pw0 to the vicinity of the area C1 where chips have accumulated, and the orientation of the discharge holes 72b to 72h of the cleaning holder 71 of the cleaning tool unit 70 at the cleaning location after the movement is set. The movement of the tool spindle unit 50 may be from cleaning origin Pw0 → area C1 where chips have accumulated → cleaning origin Pw0 → area C2 → cleaning origin Pw0 → area C3 → cleaning origin Pw0 → area C4, or from cleaning origin Pw0 → area C4 → area C1 where chips have accumulated → area C3 → area C2, etc., but it is preferable that this be the shortest movement path or the shortest cleaning time throughout the entire cleaning process.

[0084] The program generating unit 330 generates a program for automatically carrying out the cleaning process based on the analysis results of the deposition state analyzing unit 320.

[0085] The program execution unit 340 causes the tool headstock moving mechanism 42, the tool headstock rotating mechanism 45, and the tool spindle rotating mechanism 57 to move, rotate, and swivel the tool spindle unit 50 based on the program generated by the program generation unit 330.

[0086] The storage unit 350 stores captured image data, programs, and data related to the processing thereof.

[0087] Next, the procedure of the operation of the control unit 300 in this embodiment will be described.

[0088] First, the control unit 300 controls the camera 106 to capture an image of the inside of the processing chamber 100 as shown in FIG. 10, and the image processing unit 310 converts the image into image data and stores it in the storage unit 350.

[0089] Next, the control unit 300 (accumulation state analysis unit 320) analyzes the image stored in the storage unit 350 and determines whether or not chips are accumulated in each small area into which the imaging area is divided. Then, the control unit 300 identifies the accumulated area, which in the example of FIG. 10 would be areas C1 to C4.

[0090] Next, the control unit 300 (program generating unit 330) obtains the contour and center of gravity position on the XZ plane of each region, and specifies the stop position of the tool spindle unit 50 during cleaning, or the movement route of the tool spindle unit 50 during cleaning while moving. Furthermore, the program generating unit 330 obtains the angle range and angular velocity for the swivel angle RJ and the rotation angle RJh for discharging coolant to the center of gravity of the corresponding region at the specified stop position or movement route. The swivel angle RJ and the rotation angle RJh may be stationary at a specific angle, reciprocating within a specific angle range, or continuously rotating in one rotation (swivel) direction.

[0091] Next, the program generation unit 330 generates a program for moving the tool spindle unit 50 between the identified stop positions or along the movement route during cleaning, and a program for indicating the rotation angle RJ of the tool spindle unit 50 and the rotation angle RJh of the cleaning tool unit 70 at any position of the tool spindle unit 50, and stores these in the memory unit 350.

[0092] Next, the control unit 300 (program execution unit 340) executes the above program and controls the tool headstock moving mechanism 42, the tool headstock turning mechanism 45, and the tool spindle rotating mechanism 57 to operate the tool spindle unit 50. In addition, in accordance with the execution of the program by the program execution unit 340, the control unit 300 causes the high-pressure pump X to supply coolant at a predetermined timing.

[0093] While the coolant is being discharged in the above-mentioned procedure, the control unit 300 periodically captures images of the regions C1 to C4 to be cleaned and identifies the size of the regions, for example, the area. Furthermore, when the identified size becomes equal to or smaller than a reference level, the control unit 300 stops discharging the coolant and controls the tool headstock moving mechanism 42 to move the tool spindle unit 50 to the next stop position.

[0094] (effect) According to the embodiment described above, the following effects are achieved. (1) The above embodiment relates to a cleaning holder 71 used in a machine tool including a first spindle unit 10 having a first spindle 11 for holding a workpiece W, a tool spindle 52 for holding a tool holder to which a tool for machining the workpiece W is attached, and a tool spindle stock 51 for accommodating the tool spindle 52, the tool spindle unit moving in three axial directions in different directions, turning the tool spindle stock 51 about a first rotation axis, and rotating the tool spindle 52 about a second rotation axis intersecting the first rotation axis, and a tool magazine 60 for accommodating a plurality of tool holders. The cleaning holder 71 is accommodated in the tool magazine 60 so as to be replaceable with a tool holder, and includes a central hole 72a through which a coolant is supplied, discharge holes 72b to 72h for discharging the coolant, and a tool attachment portion 71g to which a tool is attached. As a result, the tool spindle unit 50 holding the cleaning holder 71 can be moved in the X, Y, and Z axis directions to any position for cleaning the inside of the machining chamber 100, and the coolant hole 72 can be set to any angle by turning the tool headstock 51 and rotating the tool spindle 52. At this time, if the tool spindle 52 is rotated continuously at a low speed, the coolant hole 72 also rotates continuously, so the cleaning range becomes wider. As a result, the inside of the machining chamber 100 can be cleaned thoroughly. In addition, by making it possible to attach cutting tool 73 to cleaning holder 71, it is no longer necessary to replace a dedicated cleaning nozzle with a tool, which results in a shorter cleaning time and a larger number of tools that can be stored in tool magazine 60.

[0095] (2) In the above embodiment, the discharge holes 72b to 72h of the coolant hole portion 72 are arranged in multiple numbers so as to discharge the coolant in different directions. This allows the coolant to be discharged in multiple locations in different directions, increasing the area to be cleaned.

[0096] (3) In the above embodiment, the tool is a cutting tool bit. Since bits are used frequently, cleaning before or after machining with the bits can eliminate the need for tool replacement and shorten the cleaning time. Furthermore, machining with a cutting tool generates a large amount of cutting chips, so the cleaning method described above is more effective.

[0097] (4) By providing the cleaning holder 71, it is possible to provide the machine tool 1 which achieves the above-mentioned effects (1) to (3).

[0098] (5) The machine tool 1 can be provided with a plurality of different types of cleaning holders 71 (eg, different numbers or arrangements of discharge holes). This can further improve the effectiveness of cleaning the machine tool 1. When a cleaning holder with one coolant discharge hole is used, the coolant discharge pressure is stronger than when a cleaning holder with multiple discharge holes is used. This can further improve the cleaning power of accumulated chips.

[0099] (6) In the above embodiment, the machine tool 1 includes a machining chamber 100 that surrounds the machining portion of the workpiece W, and a control unit 300 that controls the tool spindle unit 50 to move, pivot, or rotate, and eject coolant supplied from the outside to remove chips. This allows the cleaning holder 71 of the cleaning tool unit 70 attached to the tool spindle unit 50 to discharge coolant to every corner of the machining chamber 100. As a result, manual cleaning by an operator is eliminated, and the inside of the machining chamber 100 can be efficiently and thoroughly cleaned.

[0100] (7) In the above embodiment, the machine tool 1 includes a machining chamber 100 surrounding the periphery of the machining location of the workpiece W, a camera 106 of an imaging device that images the inside of the machining chamber 100, and a control unit 300 that controls the tool spindle unit 50 to move, swing or rotate, and to eject coolant supplied from the outside to remove chips. The control unit 300 also analyzes the accumulation state of chips generated by machining in the machining chamber 100 from the image captured by the camera 106, and determines the procedure for moving, swinging or rotating the tool spindle unit 50 based on the analysis result. This makes it possible to clean only the necessary areas more efficiently, depending on the amount of chips accumulated inside the machine. Moreover, since the only mechanical device required is the installation of the camera 106, it can be introduced at a relatively low cost. Furthermore, the above embodiment makes it possible to automatically clean the inside of the machining chamber 100 based on the generated program. As a result, it becomes unnecessary to stop the machine to remove chips, which enables long-term operation.

[0101] (Modification) The present invention is not limited to the above-described embodiment and drawings. Modifications (including the deletion of components) can be made as appropriate within the scope of the present invention. An example of a modification will be described below.

[0102] The number and positions of the coolant holes 72 of the cleaning holder 71 are not limited to those in the above embodiment and can be freely changed or added. For example, there may be one hole, or multiple holes arranged in multiple rows or radially.

[0103] The tool attached to the cleaning holder 71 may be a tool other than a square cutting tool. The attachment positions and number of tools are arbitrary, and a plurality of types of tools may be attached.

[0104] In the above embodiment, the inside of the machining chamber 100 is cleaned after the regions C1 to C4 where chips are accumulated are generated by machining the workpiece W, but the inside of the machining chamber 100 may be cleaned before machining. In addition, the timing and number of times of cleaning can be determined arbitrarily.

[0105] The mounting position of the camera 106 is not limited to the ceiling member 104 in the above embodiment, but may be the wall member 101, etc. Also, the camera 106 does not have to be fixed, and may be movable manually or automatically.

[0106] Instead of the camera 106 in the above embodiment, a line scanner or an X-ray imaging device may be used.

[0107] In the above embodiment, the tool unit 80 or the cleaning tool unit 70 is attached directly to the tool spindle unit 50 from the tool magazine 60, but the tool unit 80 or the cleaning tool unit 70 may be replaced by an automatic tool changer (ATC).

[0108] In the above embodiment, in accordance with execution of the program by the program execution unit 340, a signal to supply or stop the coolant is transmitted from the control unit 300 to the external high-pressure pump X. Alternatively, a configuration may be adopted in which an external control device operates each of the control unit 300 of the machine tool 1 and the external high-pressure pump X.

[0109] In the above embodiment, the control unit 300 periodically causes the camera 106 to capture images while the coolant is being discharged. However, the control unit 300 may generate a program to determine in advance the cleaning time at each stop position of the tool spindle unit 50.

[0110] In the above embodiment, the tool spindle unit 50 moves in three perpendicular axial directions, the X-axis direction, the Y-axis direction, and the Z-axis direction. However, the tool spindle unit 50 may also move in three axial directions that are not perpendicular but have different orientations.

[0111] Furthermore, the first spindle unit 10, the second spindle unit 20, etc. of the machine tool may have any configuration. [Explanation of symbols]

[0112] 1...machine tool, 10...first spindle unit, 11...first spindle, 11a...first workpiece holder, 12...first spindle stock, 13Z...first spindle movement mechanism, 14...movement mechanism support member, 15...guide bush support member, 16...magazine support member, 20...second spindle unit, 21...second spindle, 21a...second workpiece holder, 22...second spindle stock, 25...second spindle movement mechanism, 25R...rail, 25S...slide base, 25X...X movement mechanism, 25Z...Z movement mechanism, 30...tool rest, 31...drive unit, 33Y...tool rest movement mechanism, 35...tool, 42...tool headstock movement mechanism, 42a...column, 4 2b...piping connection portion, 42c...coolant supply port, 42d...coolant flow passage, 42R...rail, 42S...slide base, 42X...X-movement mechanism, 42Y...Y-movement mechanism, 42Z...Z-movement mechanism, 45...tool headstock swivel mechanism, 50...tool headstock unit, 51...tool headstock, 52...tool headstock, 53...rotary joint, 54...drawbar, 54a...center hole, 55...tool gripping mechanism portion, 55a...main body portion, 55b...clamp portion, 55c...center hole, 56...tool holder mounting portion, 56a...center hole, 57...tool headstock rotation mechanism, 58...tool headstock mounting base, 60...tool magazine , 61 ... tool support portion, 61a ... tool gripping portion, 62 ... drive portion, 70 ... cleaning tool unit, 71 ... cleaning holder, 71a ... first portion, 71b ... second portion, 71c ... third portion, 71d ... flat portion, 71e ... flat portion, 71f ... tapered surface portion, 71g ... tool attachment portion, 71h ... screw hole, 71i ... recess, 72 ... coolant hole portion, 72a ... center hole, 72b ... discharge hole, 72c ... discharge hole, 72d ... discharge hole, 72e ... discharge hole, 72f ... discharge hole, 72g ... discharge hole, 72h ... discharge hole, 72i ... concentration point, 73 ... cutting tool, 73a ... tool body portion, 73b ... machining tip, 73c ... protrusion portion, 74 ...Set screw, 80...Tool unit, 90...Guide bush device, 100...Machining chamber, 101...Wall member, 102...Wall member, 103...Wall member, 104...Ceiling member, 105...Door, 106...Camera, 107...Window, 108...Tool exchange door, 111...Cover, 112...Cover, 113...Cover, 114...Cover, 300...Control unit, 310...Image processing unit, 320...Deposition state analysis unit, 330...Program generation unit, 340...Program execution unit, 350...Memory unit, Az...Rotation axis, C1 to C4...Area, J...Rotation center axis, Jh...Rotation center axis, Pc...Tool exchange position, Pw0...Cleaning origin,RJ...swivel angle, RJh...rotation angle, S...bed, Sk...recess, W...workpiece, X...high pressure pump,

Claims

1. A spindle unit having a spindle for holding a workpiece; a tool spindle unit including a tool spindle that holds a tool holder to which a tool for machining the workpiece is attached, and a tool spindle stock that houses the tool spindle, the tool spindle moving in three axial directions oriented in different directions, the tool spindle stock turning about a first rotation axis, and the tool spindle rotating about a second rotation axis that intersects with the first rotation axis; a tool magazine that accommodates a plurality of the tool holders; A cleaning holder for use in a machine tool comprising: The cleaning holder includes: The tool is stored in the tool magazine, The tool includes a coolant inlet through which a coolant is supplied, a coolant discharge hole through which the coolant is discharged, and a tool attachment portion to which the tool is attached. Cleaning holder.

2. The coolant discharge hole is arranged in a plurality of holes so as to discharge the coolant in a plurality of different directions. The cleaning holder of claim 1 .

3. The tool is a cutting tool. The cleaning holder of claim 1 .

4. A machine tool comprising the cleaning holder according to any one of claims 1 to 3.

5. A plurality of different types of the cleaning holders are provided. The machine tool according to claim 4.

6. A machining chamber surrounding a machining portion of the workpiece; and a control unit that moves, turns, or rotates the tool spindle unit and discharges the supplied coolant from the cleaning holder to remove chips generated by machining. The machine tool according to claim 4.

7. A machining chamber surrounding a machining portion of the workpiece; an imaging device for imaging the inside of the processing chamber; a control unit that moves, turns, or rotates the tool spindle unit and discharges the supplied coolant from the cleaning holder to remove chips generated by machining, The control unit analyzes the accumulation state of the chips in the machining chamber from the image captured by the imaging device, and determines a procedure for moving, turning, or rotating the tool spindle unit based on the analysis result. The machine tool according to claim 4.

Images