WO2018109974A1

WO2018109974A1 - Machine tool

Info

Publication number: WO2018109974A1
Application number: PCT/JP2017/026663
Authority: WO
Inventors: 一行内田; 紘太奈良
Original assignee: Dmg森精機株式会社
Priority date: 2016-12-16
Filing date: 2017-07-24
Publication date: 2018-06-21
Also published as: JP6297128B1; JP2018094697A

Abstract

A horizontal machining center comprises: a main spindle to which a tool can be mounted; a tool clamping device (41) that clamps the tool to the main spindle; a tool clamp detector (44) that detects the clamped state of the tool by the tool clamping device (41); a tool exchanging mechanism (42) that exchanges the tool mounted to the main spindle (22); and a control unit (52) that operates the tool exchanging mechanism (42) to exchange a first tool with a second tool that is the same type as the first tool when the clamp state of the first tool in the main spindle (22) is detected to be abnormal with the tool clamp detector (44). By virtue of such a configuration, a machine tool is provided for which productivity is not significantly reduced even if the tool clamp state is detected to be abnormal.

Description

Machine Tools

The present invention relates generally to a machine tool, and more particularly to a machine tool provided with a tool clamp detection unit that detects a clamp state of a tool.

With regard to conventional machine tools, for example, Japanese Patent Application Laid-Open No. 2002-200542 discloses a machine tool for the purpose of detecting a chuck error simply and reliably (Patent Document 1).

In the machine tool disclosed in Patent Document 1, the chuck of the tool holder is measured by measuring the change in the distance to the outer peripheral surface of the flange portion of the tool holder mounted on the main shaft in correspondence with the rotation angle of the tool holder. Determine if there is a mistake. If it is determined that there is a chuck error, the ATC is performed again, and if the chuck error continues even after the ATC is performed again, a command such as operation stop or alarm is issued.

Japanese Patent Application Laid-Open No. 2002-200542

As disclosed in Patent Document 1 mentioned above, there is known a machine tool provided with various tool clamp detection units for detecting a clamp state of a tool. In such a machine tool, if the machining of the work is stopped when it is detected that the clamping state of the tool is abnormal, the productivity of the machine tool is significantly reduced.

Therefore, an object of the present invention is to solve the above-mentioned problems, and to provide a machine tool in which the productivity is not significantly reduced even when it is detected that the clamping state of the tool is abnormal. It is.

A machine tool according to the present invention comprises a tool mounting unit capable of mounting a tool, a tool clamping device for clamping a tool to the tool mounting unit, a tool clamp detection unit for detecting a clamping state of a tool by the tool clamping device, a tool A tool replacement mechanism unit for replacing a tool mounted on the mounting unit, and a first tool for the first tool when the clamp state of the first tool in the tool mounting unit is detected as abnormal by the tool clamp detection unit And a control unit that operates the tool change mechanism to change the tool to the second tool of the same kind.

According to the present invention, it is possible to provide a machine tool in which the productivity is not significantly reduced even when the clamping state of the tool is detected to be abnormal.

It is a perspective view which shows the horizontal machining center in Embodiment 1 of this invention. In the horizontal machining center in FIG. 1, it is a block diagram which shows the mechanism for eliminating the misclamping of a tool. In the horizontal machining center in FIG. 1, it is a perspective view which shows the process of automatic tool change (ATC: Automatic Tool Change). It is sectional drawing which shows the machine front part of the spindle head in FIG. It is sectional drawing which shows the air purge process of the tool with which the main axis | shaft was mounted | worn. In the horizontal machining center in FIG. 1, it is a flow figure showing the flow which eliminates the mis-clamping of a tool. The horizontal machining center in Embodiment 2 of this invention WHEREIN: It is a block diagram which shows the mechanism for eliminating the misclamping of a tool.

Embodiments of the present invention will be described with reference to the drawings. In the drawings referred to below, the same or corresponding members are denoted by the same reference numerals.

Embodiment 1
FIG. 1 is a perspective view showing a horizontal machining center according to a first embodiment of the present invention. In FIG. 1, the internal structure of the horizontal machining center is shown by seeing through the cover body which has the appearance of the horizontal machining center. FIG. 2 is a block diagram showing a mechanism for removing tool misclamping in the horizontal machining center in FIG.

First, the basic structure of a horizontal machining center 100 according to the present embodiment will be described with reference to FIGS. 1 and 2. The horizontal machining center 100 has a bed 12, a column 14, a spindle base 23, a spindle head 20, and a table (not shown).

The bed 12 is a base member for mounting the column 14 and the table, etc., and is installed on a mounting surface of a factory or the like.

A column 14 is attached to the bed 12. The column 14 generally has a gate-like shape standing on the upper surface of the bed 12. The column 14 is slidably provided in the X axis direction parallel to the horizontal direction with respect to the bed 12. The bed 12 and the column 14 are appropriately provided with a feed mechanism and a guide mechanism for enabling the slide movement of the column 14 in the X-axis direction, a servomotor as a drive source, and the like.

The spindle base 23 is attached to the column 14. The spindle base 23 is provided so as to be slidable in the Y-axis direction which is parallel to the vertical direction and perpendicular to the X-axis direction with respect to the column 14. The column 14 and the spindle base 23 are appropriately provided with a feed mechanism and a guide mechanism for enabling the slide movement of the spindle base 23 in the Y-axis direction, a servomotor as a drive source, and the like.

The spindle head 20 is attached to the spindle base 23. The spindle head 20 is provided so as to be slidable in the Z-axis direction which is parallel to the horizontal direction and is orthogonal to the X-axis and the Y-axis with respect to the spindle base 23. The spindle base 23 and the spindle head 20 are appropriately provided with a feed mechanism and a guide mechanism for enabling slide movement of the spindle head 20 in the Z-axis direction, a servomotor as a drive source, and the like.

The spindle head 20 has a spindle cylinder 21 and a spindle 22. The main spindle cylinder 21 is provided so as to project from the main spindle base 23 in a cylindrical shape along the Z-axis direction. The main spindle cylinder 21 is disposed in the processing area at a tip protruding from the main spindle base 23.

The spindle 22 is rotatably supported by the spindle cylinder 21. The main shaft 22 rotates about a central axis 101 parallel to the Z-axis by motor drive. A tool for processing a workpiece to be processed is mounted on the spindle 22. The spindle 22 is provided as a tool mounting portion on which a tool can be mounted.

A table (not shown) is an apparatus for fixing a work. The table is fixed to the bed 12 in the processing area. The slide movement of the column 14 in the X-axis direction, the slide movement of the spindle base 23 in the Y-axis direction, and the slide movement of the spindle head 20 in the Z-axis direction combine to form a workpiece by a tool mounted on the spindle 22 The processing position of moves in three dimensions.

Horizontal machining center 100 further includes a magazine 31 and a magazine support portion 36.

The magazine support 36 is fixed to the bed 12. The magazine support portion 36 generally has a gate-like shape provided upright on the upper surface of the bed 12. The magazine support portion 36 is disposed adjacent to the column 14 in front of the machine in the Z-axis direction.

The magazine 31 is supported by the magazine support portion 36. The magazine 31 is disposed above the processing area in the Y-axis direction. An openable shutter (not shown) is provided between the magazine 31 and the processing area.

The magazine 31 is configured to be able to store a plurality of tools. More specifically, the magazine 31 has a magazine base 32 and a plurality of tool holders 33. The magazine base 32 has a disk shape disposed parallel to the XY plane. The magazine base 32 is provided so as to be pivotable about a central axis 102 parallel to the Z-axis by motor drive.

The plurality of tool holders 33 are annularly attached on the outer periphery of the magazine base 32. The tool holder 33 is configured to be able to hold a tool. In the present embodiment, the tool holding portion 33 is constituted by a pair of claw members capable of holding a tool (a shank flange portion 200t described later). As the magazine base 32 pivots, the plurality of tool holders 33 rotate about the central axis 102.

FIG. 3 is a perspective view showing a process of automatic tool change (ATC) in the horizontal machining center in FIG.

Referring to FIGS. 1 to 3, horizontal machining center 100 further includes a tool exchange mechanism 42. The tool replacement mechanism unit 42 is configured to be able to replace a tool mounted on the spindle 22. The tool exchange mechanism 42 is configured to exchange tools between the main shaft 22 and the magazine 31.

More specifically, when the tool mounted on the main shaft 22 is replaced with another tool stored in the magazine 31, first, by turning the magazine base 32, the empty tool holding portion 33 is specified. The tool change position (in the present embodiment, the position immediately below the central axis 102) is indexed. With the shutter at the upper side of the processing area open, the spindle head 20 approaches the magazine 31. By moving the spindle head 20 upward in the Y-axis direction, the tool mounted on the spindle 22 is positioned inside the tool holder 33 in a vacant state. The tool holding unit 33 holds the tool and, by unclamping the tool clamping device 41 described later, the clamping state of the tool by the spindle 22 is released.

The spindle 22 is retracted from the tool by moving the spindle head 20 rearward of the machine in the Z-axis direction. By pivoting the magazine base 32, the tool holder 33 holding another tool is indexed to the tool change position. By moving the spindle head 20 forward in the machine direction in the Z-axis direction, another spindle held by the tool holder 33 is inserted into the spindle 22. By clamping the tool clamp device 41 described later, another tool is clamped to the main shaft 22.

The spindle 22 is returned into the processing area by moving the spindle head 20 downward in the Y-axis direction. The shutter above the processing area is closed. Thus, the ATC process of replacing the tool mounted on the spindle 22 with another tool stored in the magazine 31 is completed.

As described above, in the horizontal machining center 100 according to the present embodiment, the tool exchange mechanism unit 42 is configured by the spindle head 20 and the magazine 31 that perform ATC operations in conjunction with each other.

In the present invention, the present invention is not limited to the tool exchange mechanism 42 for delivering the tool directly between the spindle 22 and the magazine 31 as described above, for example, a pivoting arm for delivering the tool between the spindle 22 and the magazine 31 A tool exchange mechanism provided with

FIG. 4 is a cross-sectional view showing the machine front portion of the spindle head in FIG. Referring to FIG. 4, main shaft 22 is rotatably supported by main shaft cylinder 21 by a plurality of bearings 24. The tool 200 is attached to the spindle 22 in a clamp state.

Referring to FIGS. 2 and 4, horizontal machining center 100 further includes a tool clamping device 41.

The tool clamp device 41 is provided on the main shaft 22. The tool clamping device 41 is configured to be capable of clamping the tool 200 on the spindle 22. The tool 200 is clamped to the main shaft 22 by clamping the tool clamp device 41, and the tool 200 is unclamped from the main shaft 22 by ampli? Er operation of the tool clamp device 41.

As an example, a collet capable of holding the tool 200, a drawbar for opening and closing the collet by moving back and forth along the axial direction of the central axis 101, a disc spring fitted to the drawbar, and an oil pressure acting on the drawbar A tool clamp device 41 having a hydraulic mechanism to be used is used. In this case, the clamping force of the tool 200 is obtained by the spring force of the disc spring, and the unclamping force of the tool 200 is obtained by the hydraulic pressure generated by the hydraulic mechanism.

Typically, the tool 200 includes a shank taper portion 200s, a shank flange portion 200t, a pull stud portion 200p, and a blade portion 200q.

The shank taper portion 200 s has a tapered shape, and is a portion that is surface restrained by the main shaft 22 when the tool 200 is clamped. The shank flange portion 200t has a shape that spreads like a hook from one end of the shank taper portion 200s, and is a portion held by the tool holding portion 33 at the time of ATC of the tool 200. The pull stud portion 200p is a bolt member connected to the other end of the shank taper portion 200s, and is a portion pulled into the main shaft 22 by the tool clamping device 41 when the tool 200 is clamped.

The horizontal machining center 100 further includes a tool clamp detection unit 44. The tool clamp detection unit 44 is configured to be able to detect the clamp state of the tool 200 by the tool clamp device 41.

As an example, a proximity sensor capable of detecting the position of the draw bar of the tool clamp device 41 is used as the tool clamp detection unit 44. When the proximity sensor detects that the drawbar is at the proper position at the time of clamping in the axial direction of the central axis 101, it is determined that the clamping state of the tool 200 is normal, and the proximity sensor detects that the drawbar is central axis 101 If it is not detected that the clamp 200 is in the proper position at the time of clamping, the clamping state of the tool 200 is determined to be abnormal.

In addition, as the tool clamp detection part 44, it is not restricted to said proximity sensor, For example, the contact-type sensor which can detect the displacement of a drawbar may be used.

FIG. 5 is a cross-sectional view showing an air purge process of the tool mounted on the spindle. In FIG. 5, an unclamped state of the tool is shown in a range surrounded by a two-dot chain line V in FIG. 4. Referring to FIGS. 2 and 5, horizontal machining center 100 further includes a first cleaning portion 43. The first cleaning unit 43 is provided on the spindle 22. The first cleaning unit 43 is configured to be able to clean a tool attached to the spindle 22.

More specifically, the main shaft 22 has a tapered surface 26. When the tool 200 is clamped, the shank taper portion 200 s of the tool 200 makes surface contact with the taper surface 26. An air flow hole 28 is formed in the main shaft 22. The air flow holes 28 open to the tapered surface 26. When the tool 200 is unclamped, air is injected into the gap 27 between the shank taper portion 200s and the taper surface 26 through the air flow hole 28 to remove foreign matter such as chips attached to the shank taper portion 200s from the tool 200. Be

As described above, in the horizontal machining center 100 according to the present embodiment, the first cleaning unit 43 is configured by the air purge mechanism that injects the air into the gap 27 through the air flow hole 28.

Referring to FIG. 2, horizontal machining center 100 further includes control device 51. The control device 51 is a control panel mounted on the horizontal machining center 100 to control various operations of the horizontal machining center 100.

The control device 51 includes a control unit 52 and a storage unit 53. The control unit 52 performs a clamping operation and an unclamping operation by the tool clamp device 41, an ATC operation by the tool replacement mechanism unit 42, a detection operation of the tool clamp by the tool clamp detection unit 44, and an air purge operation by the first cleaning unit 43. And control.

FIG. 6 is a flow chart showing a flow for eliminating tool misclamping in the horizontal machining center in FIG.

Referring to FIGS. 1 to 6, first, the first tool to be used for the next workpiece processing is moved from the magazine 31 to the main shaft 22 by the ATC operation by the tool replacement mechanism unit 42. The first tool is clamped on the main shaft 22 by the clamping operation of the tool clamping device 41 (S101).

Next, the clamp state of the first tool on the main spindle 22 is detected by the detection operation of the tool clamp by the tool clamp detection unit 44 (S102). The detection result of the clamp state of the first tool in the tool clamp detection unit 44 is sent to the control unit 52.

Next, the control unit 52 determines whether the clamp state of the first tool detected by the tool clamp detection unit 44 is normal or abnormal (S103). In S103, when the control unit 52 determines that the clamp state of the first tool is normal, the clamp of the first tool is completed, and work processing is performed using the first tool (S104).

On the other hand, when the control unit 52 determines that the clamp state of the first tool is abnormal in S103, the number of times the storage unit 53 determines that the clamp state of the first tool is abnormal (that is, the first tool The number of times the mis-clamping has been repeated is stored (S105). Next, the control unit 52 determines whether or not the number of times the misclamping of the first tool is repeated is within a threshold (for example, three times) (S106).

In S106, when the control unit 52 determines that the number of times the first tool is repeatedly mis-clamped is within the threshold, the first cleaning unit 43 cleans the first tool by the air purge operation (S107). ). More specifically, the first tool is unclamped from the main shaft 22 by the unclamping operation of the tool clamping device 41. The first cleaning portion 43 purges the air into the gap 27 formed between the shank taper portion 200 s of the first tool and the tapered surface 26. Thereafter, the clamping operation by the tool clamping device 41 returns to the step of S101 of clamping the first tool to the main shaft 22 again.

In S106, when the control unit 52 determines that the number of times the first tool is repeatedly mis-clamped is greater than the threshold value, the first tool mounted on the main shaft 22 by the ATC operation by the tool replacement mechanism unit 42. Are replaced with a second tool of the same type as the first tool stored in the magazine 31 (S108). Thereafter, the clamping operation by the tool clamping device 41 returns to the step of S101 in which the second tool is clamped to the main shaft 22.

As described above, in the present embodiment, when the number of times the mis-clamping of the first tool is repeated is more than the threshold value, the cause of the mis-clamping is that foreign matter such as chips adheres to the first tool. It is determined that the first tool itself is not, and clamping to the spindle 22 is attempted using a second tool similar to the first tool. Then, when the second tool eliminates the mis-clamping, the second tool is used to execute work processing. If mis-clamping is also repeated by the second tool, an alarm may be notified or work processing may be stopped thereafter.

If the workpiece machining performed by the first tool can also be performed by the second tool, then the second tool can be said to be of the same type as the first tool. For example, when the work processing performed by the first tool is a drilling process, the second tool may be a tool having the same drill diameter as the first tool and a different drill length. In this case, the control unit 52 may automatically reflect the difference between the drill lengths of the first tool and the second tool as a correction value on the workpiece processing program.

Other examples of such similar tools include combinations of drills and end mills in drilling, and combinations of end mills and milling in facing.

If the magazine 31 is provided with the same spare tool as the first tool, the spare tool corresponds to the second tool of the same type as the first tool.

Referring to FIG. 2, horizontal machining center 100 further includes notification device 45. Typically, notification device 45 is a display panel capable of displaying processing information and the like in horizontal machining center 100.

The notification device 45 may notify the operator that the first tool that has been repeatedly mis-clamped has been replaced by the tool replacement mechanism unit 42 with the second tool. By grasping such facts, the operator can take measures against mis-clamping, such as early replacement of the first tool with another tool.

The control unit 52 is a tool change mechanism such that the second tool of the first tool and the second tool is attached to the main shaft 22 at the time of work processing to be performed using the first tool after work processing by the second tool. The unit 42 may be operated. In this case, it is possible to avoid repeated misclamping by the first tool.

The basic structure of the horizontal machining center 100 according to the first embodiment of the present invention described above will be described collectively. The horizontal machining center 100 as a machine tool according to the present embodiment is a tool mounting portion to which a tool can be mounted. , A tool clamp device 41 for clamping a tool to the spindle 22, a tool clamp detection unit 44 for detecting a clamping state of a tool by the tool clamp device 41, and a tool replacement mechanism for replacing a tool mounted on the spindle 22 When it is detected that the clamping state of the first tool in the spindle 22 is abnormal in the part 42 and the tool clamp detection unit 44, the tool is replaced with the second tool of the same type as the first tool. And a control unit 52 for operating the exchange mechanism unit 42.

According to the horizontal machining center 100 according to the first embodiment of the present invention configured as described above, when mis-clamping occurs by the first tool, the work machining is not immediately stopped but the same kind as the first tool is used. Try clamping with the second tool of. As a result, the possibility of continuing the workpiece processing is increased, and the productivity in the horizontal machining center 100 can be improved.

The machine tool to which the present invention is applied is not limited to a horizontal machining center, and may be, for example, a vertical machining center or a lathe, or a combined machining machine having a turning function and a milling function. The tool mounting portion capable of mounting a tool is not limited to the spindle, and may be, for example, a tool post of an lathe provided with an ATC function.

Second Embodiment
FIG. 7 is a block diagram showing a mechanism for eliminating tool misclamping in a horizontal machining center according to a second embodiment of the present invention. The horizontal machining center in the present embodiment has basically the same structure as that of the horizontal machining center 100 in the first embodiment. Hereinafter, the description of the overlapping structure will not be repeated.

Referring to FIG. 7, the horizontal machining center in the present embodiment further includes a second cleaning portion 46. The second cleaning unit 46 is provided to be able to clean the first tool replaced with the second tool by the tool replacement mechanism unit 42 at a position away from the main shaft 22 in the step of S108 in FIG. There is.

More specifically, the second cleaning unit 46 is provided at a specific turning position of the tool holding unit 33 in the magazine 31. The second cleaning unit 46 is configured to be able to jet air toward the first tool held by the tool holding unit 33 positioned at the specific turning position.

In the horizontal machining center in the present embodiment, after the first tool mounted on the main shaft 22 is replaced with the second tool in the step of S108 in FIG. 6, misclamping is caused by turning the magazine base 32. The first tool is moved from the tool change position in the magazine 31 to the specific turning position described above. Next, the first tool is cleaned by an air purge operation by the second cleaning unit 46.

It is preferable that the cleaning process of the first tool by the second cleaning unit 46 be performed in parallel with the work processing by the second tool.

The control unit 52 is a tool change mechanism such that the first tool of the first tool and the second tool is attached to the spindle 22 at the time of work processing to be performed using the first tool after work processing by the second tool. The unit 42 is operated. Thereby, for example, when the tool life of the first tool is shorter than the tool life of the second tool, the first tool cleaned by the second cleaning unit 46 can be preferentially used.

In addition, the 2nd cleaning part 46 is not restricted to the said structure, For example, you may be provided in the washing station installed separately from the magazine 31. As shown in FIG. In this case, the second cleaning unit 46 is configured to be capable of injecting the cleaning coolant toward the first tool transferred from the magazine 31 to the cleaning station. Further, the cleaning means of the first tool is not limited to air or coolant, and for example, a brush which contacts the first tool to remove foreign matter such as chips may be used.

According to the horizontal machining center according to Embodiment 2 of the present invention configured as described above, the effects described in Embodiment 1 can be similarly exhibited.

Hereinafter, the configuration of the present invention and the effects of the present invention will be described.
A machine tool according to the present invention comprises a tool mounting unit capable of mounting a tool, a tool clamping device for clamping a tool to the tool mounting unit, a tool clamp detection unit for detecting a clamping state of a tool by the tool clamping device, a tool A tool replacement mechanism unit for replacing a tool mounted on the mounting unit, and a first tool for the first tool when the clamp state of the first tool in the tool mounting unit is detected as abnormal by the tool clamp detection unit And a control unit that operates the tool change mechanism to change the tool to the second tool of the same kind.

According to the machine tool configured as described above, when it is detected that the clamp state of the first tool is abnormal, an attempt is made to eliminate the abnormality of the clamp state using the second tool of the same type as the first tool. This can prevent the productivity of the machine tool from being significantly reduced.

Also preferably, the machine tool further includes a first cleaning unit configured to clean a tool mounted on the tool mounting unit. When the control unit detects that the clamp state of the first tool is abnormal in the tool clamp detection unit, the control unit performs the first operation before operating the tool replacement mechanism unit to replace the first tool with the second tool. The first cleaning unit is operated to clean the tool.

According to the machine tool configured as described above, it is possible to eliminate the abnormality in the clamp state caused by the attachment of foreign matter such as chips to the first tool.

Also preferably, the control unit repeats the abnormality detection of the clamp state of the first tool in the tool clamp detection unit and the cleaning of the first tool by the first cleaning unit a predetermined number of times or more, and further, the tool clamp When it is detected in the detection unit that the clamp state of the first tool in the tool mounting unit is abnormal, the tool replacement mechanism unit is operated to replace the first tool with the second tool.

According to the machine tool configured as described above, the first tool is replaced with the second tool when abnormality detection of the clamp state of the first tool is repeated despite the cleaning of the first tool. .

Further preferably, the first cleaning unit is configured to be able to supply air to a gap between the tool mounting unit and the tool mounted on the tool mounting unit.

According to the machine tool configured as described above, foreign substances such as chips present in the gap between the tool mounting portion and the tool mounted on the tool mounting portion can be removed from the gap.

Further preferably, the control unit changes the tool so that the second tool of the first tool and the second tool is mounted on the tool mounting portion at the time of work processing using the first tool after work processing by the second tool. Operate the mechanism unit.

According to the machine tool configured as described above, it is possible to avoid that the abnormality detection of the clamp state caused by the first tool is repeated.

Also preferably, the machine tool further includes a second cleaning unit configured to clean the first tool replaced with the second tool by the tool replacement mechanism at a position away from the tool mounting unit.

According to the machine tool configured as described above, foreign substances such as chips attached to the first tool can be removed from the first tool.

Preferably, when the first cleaning unit cleans the first tool by the second cleaning unit, the control unit controls the first tool and the second tool at the time of work processing using the first tool after the work processing by the second tool. The tool exchange mechanism is operated to mount the first one of the tools on the tool mounting unit.

According to the machine tool configured as described above, when the first tool is cleaned by the second cleaning unit, work processing is performed using the first tool from which foreign substances such as chips are removed.

Also preferably, the machine tool further includes a notification device that notifies the worker that the first tool has been replaced with the second tool by the tool replacement mechanism.

According to the machine tool configured as described above, the operator can grasp the tool detected that the clamp state is abnormal.

It should be understood that the embodiments disclosed herein are illustrative and non-restrictive in every respect. The scope of the present invention is shown not by the above description but by the scope of claims, and is intended to include all modifications within the scope and meaning equivalent to the scope of claims.

The present invention is applied to a machine tool.

12 bed, 14 column, 20 spindle head, 21 spindle cylinder, 22 spindle, 23 spindle base, 24 bearing, 26 tapered surface, 27 gap, 28 air flow holes, 31 magazine, 32 magazine base, 33 tool holder, 36 magazine Support part, 41 tool clamp device, 42 tool exchange mechanism part, 43 first cleaning part, 44 tool clamp detection part, 45 notification device, 46 second cleaning part, 51 control device, 52 control part, 53 storage part, 100 horizontal type Machining center, 101, 102 central axis, 200 tools, 200p pull stud, 200q blade, 200s shank taper, 200t shank flange.

Claims

A tool mounting unit capable of mounting a tool;
A tool clamping device for clamping a tool on the tool mounting portion;
A tool clamp detection unit that detects a clamp state of a tool by the tool clamp device;
A tool replacement mechanism unit for replacing a tool mounted on the tool mounting unit;
The tool clamp detection unit is configured to replace the first tool with a second tool of the same type as the first tool when it is detected that the clamp state of the first tool in the tool mounting unit is abnormal in the tool clamp detection unit. And a control unit for operating the tool replacement mechanism.
The apparatus further comprises a first cleaning unit that cleans a tool mounted on the tool mounting unit,
The control unit operates the tool replacement mechanism unit to replace the first tool with the second tool when the tool clamp detection unit detects that the clamp state of the first tool is abnormal. The machine tool according to claim 1, wherein the first cleaning unit is operated to clean the first tool before making the first tool clean.
The control unit repeats the abnormality detection of the clamp state of the first tool in the tool clamp detection unit and the cleaning of the first tool by the first cleaning unit a predetermined number of times or more. The tool replacement mechanism is operated to replace the first tool with the second tool when the tool clamp detection unit detects that the clamp state of the first tool in the tool mounting unit is abnormal. The machine tool according to claim 2.
The machine tool according to claim 2, wherein the first cleaning unit is configured to be capable of supplying air to a gap between the tool mounting unit and a tool mounted to the tool mounting unit.
The control unit is configured to attach the second tool of the first tool and the second tool to the tool mounting portion at the time of work processing using the first tool after work processing by the second tool. The machine tool according to any one of claims 1 to 4, wherein the tool exchange mechanism is operated.
The second cleaning unit according to any one of claims 1 to 5, further comprising: a second cleaning unit configured to clean the first tool replaced with the second tool by the tool replacement mechanism at a position separated from the tool mounting unit. Machine tool described.
When the first tool is cleaned by the second cleaning unit, the control unit performs the first tool and the first tool at the time of work processing using the first tool after work processing by the second tool. The machine tool according to claim 6, wherein the tool exchange mechanism is operated to mount the first tool of the two tools in the tool mounting unit.
The machine tool according to any one of claims 1 to 7, further comprising: a notification device that notifies an operator that the first tool has been replaced with the second tool by the tool replacement mechanism.