JP2022187448A - Machine tool - Google Patents

Abstract

To prevent interference between a shutter which protects equipment for photographing a tool and a tool exchanger.SOLUTION: A machine tool comprises: a mounting part that can move while being mounted with a tool; a tool exchange part that exchanges the tool mounted on the mounting part; a photographing part that photographs the tool mounted on the mounting part; a first shutter which can move between an open state where a light receiving surface of the photographing part is opened and a close state where the light receiving surface is closed; and a first sensor that senses the open state of the first shutter. When the first shutter is in the open state, the first shutter is installed at a position in a movable range of the tool exchange part, and when the first sensor does not sense the open state, the tool exchange part moves and mounts the tool on the mounting part.SELECTED DRAWING: Figure 7

Description

The present invention relates to control of tool change in a machine tool provided with a shutter that protects equipment for photographing the tool.

Machine tools include a device that cuts a workpiece into a desired shape and a device that creates a workpiece by laminating metal powder or the like. Machine tools for cutting include a turning center that processes the workpiece by applying a cutting tool to the rotating workpiece, and a machining center that processes the workpiece by applying a rotating tool to the workpiece. These functions are combined. There are multi-tasking machines equipped with

A tool is fixed to a tool holder such as a spindle or a tool rest. A machine tool processes a workpiece while exchanging tools and moving a tool holder according to a machining program prepared in advance. The cutting edge of the tool gradually wears out due to friction with the workpiece. The operator needs to determine the tool life while appropriately checking the tool length (see Patent Literatures 1 and 2).

JP-A-10-143216 Japanese Unexamined Patent Application Publication No. 2017-21472

Before or after use of the tool, the geometry of the tool is inspected, as appropriate. When inspecting a tool, a method of capturing an image of the tool with a camera and determining the shape of the tool based on the captured image is conceivable. During the processing work, in other words, when the camera is not in use, the imaging equipment such as the camera is protected by the shutter. Therefore, the shutter is controlled so that it is opened when the camera starts to be used and closed when the camera is finished.

However, if the operating range of the shutter overlaps with the operating range of the tool changer, it is necessary to prevent interference between the tool changer and the shutter during tool replacement.

Accordingly, the present disclosure provides techniques described in the claims.

According to the present disclosure, it is possible to prevent interference between the tool changer and the shutter that protects the equipment for photographing the tool.

1 is an external view of a machine tool; FIG. FIG. 4 is a schematic diagram showing the positional relationship among a tool, a camera, and a lighting device in a tool recognition area; It is a peripheral perspective view of a tool recognition area. FIG. 4 is a side cross-sectional view of each mechanism in the tool recognition area; It is a figure which shows the back side of the cover surface of a 1st shutter. 1 is a hardware configuration diagram of a machine tool and an image processing device; FIG. Fig. 4 is a flow chart showing the process for tool change; FIG. 4 is a side cross-sectional view of each mechanism in a tool recognition area in a reference example; FIG. 11 is a side view of a tool recognition area in an example implementation of a machine tool;

FIG. 1 is an external view of a machine tool 100. FIG.
A machine tool 100 according to the present embodiment is a multitasking machine that processes a work placed within a processing area 200 . A workpiece is fixed to a holding portion 104 and cut by a tool 102 attached to a spindle. The holding portion 104 is rotationally driven by the driving mechanism. In this example, the spindle corresponds to "a tool holding portion capable of holding a tool within the imaging area". In the case of a turning center, the tool post corresponds to "a tool holder capable of holding a tool within the imaging area".

When the tool 102 is inserted into the tool recognition area 210 , the upper illumination device 108 illuminates the tool 102 and the lower camera 106 images the tool 102 . The camera 106 corresponds to "an imaging section that captures an image of the tool 102 attached to the attachment section". The illumination device 108 corresponds to "an illumination unit that performs illumination for imaging the tool 102". Tool registration and tool inspection are performed based on the captured image at this time. The configuration of the tool recognition area 210 is further detailed in connection with FIG. 2 below.

The machine tool 100 includes a cover 202 that blocks the outside. Cover 202 includes door 204 . An operator opens the door 204 to mount and remove the work. The operation panel 206 receives various operations for the machine tool 100 from the operator.

Operation panel 206 is connected to image processing apparatus 110 . A worker can remotely monitor the working status of the machine tool 100 using the image processing device 110 . In this embodiment, the main body of the machine tool 100 and the image processing device 110 are connected via a wired cable. Image processing device 110 may be formed as an internal device of machine tool 100 , for example, operation panel 206 .

The operation panel 206 may be formed as a part of the machine tool 100 or configured to be detachable from the machine tool 100 and transportable.

The tool storage section 130 stores a plurality of tools 102 . A tool changer (to be described later) acquires a tool 102 from a plurality of tools 102 stored in the tool storage 130 and mounts it on the spindle. As shown in FIG. 1, the Y-axis and Z-axis are set in the horizontal direction, and the X-axis is set in the vertical direction. The Z-axis direction corresponds to the axial direction of the spindle and the work.

FIG. 2 is a schematic diagram showing the positional relationship among the tool 102, the camera 106 and the illumination device 108 in the tool recognition area 210. As shown in FIG.
The tool 102 includes a blade portion 112 used for machining a workpiece and a shank portion 114 fixed to a holder 118 of a spindle 116 . The spindle 116 is configured to be rotatable and movable while holding the tool 102 . The spindle 116 can also rotate the tools it holds.

The camera 106 includes an image sensor (imaging element) such as a CMOS (Complementary Metal Oxide Semiconductor) or a CCD (Charge-Coupled Device). The camera 106 images the tool 102 attached to the spindle 116 from below (in the X-axis direction). The camera 106 is connected to the image processing device 110 and the captured image is transmitted to the image processing device 110 . Camera 106 is fixed in tool recognition area 210 . By rotating the tool 102 with the main shaft 116 around the Z-axis, the tool 102 can be imaged from multiple directions. Further, by moving the tool 102 in the horizontal direction (YZ direction) with the spindle 116, it is possible to image a plurality of locations of the tool 102. FIG.

A lighting device 108 is fixed to the upper portion so as to face the camera 106 . A lighting device 108 illuminates the tool 102 from above. Transmitted illumination by the illumination device 108 allows the camera 106 to acquire a high-contrast captured image that facilitates grasping the contour position of the tool 102 .

When the user newly registers the tool 102 (hereinafter referred to as “tool registration”), the user sets the tool registration mode on the operation panel 206 and attaches the new tool 102 to the spindle 116 . Next, enter an arbitrary tool ID. A spindle 116 moves and rotates the tool 102 and a fixed camera 106 automatically images the tool 102 from various positions and orientations. A tool shape is recognized from a large number of captured images obtained by the camera 106, and the tool ID and the tool shape are associated and registered. With such a control method, the tool shape can be automatically associated with the tool ID and registered for each tool 102 . The tool geometry is formed as two-dimensional data or three-dimensional data.

Further, when inspecting the tool 102 before or after machining, the spindle 116 causes the tool 102 to enter the tool recognition area 210 . As in new registration, the spindle 116 moves and rotates the tool 102, and the camera 106 automatically captures images of the tool 102 from various positions and directions. A tool shape is recognized from a large number of captured images obtained by the camera 106 . Hereinafter, such an inspection that is appropriately performed during machining will be referred to as a "tool inspection". The operator compares the tool shape data at the time of tool registration and the tool shape data at the time of tool inspection to determine the degree of wear of the tool 102 and the presence/absence of chipping.

The tool storage section 130 exists behind the tool recognition area 210 (on the Y-axis negative direction side) when viewed from the spindle 116 (see FIG. 1). When changing the tool, the spindle 116 goes deep into the tool recognition area 210 and receives the tool change in the tool storage section 130 . At this time, camera 106 and illumination device 108 are protected by an internal shutter (described later). On the other hand, during tool registration and tool inspection, the spindle 116 enters the tool recognition area 210 relatively shallowly. Control is performed so that interference between the internal shutter, the holder 118, and the spindle 116 does not occur during tool replacement. Internal shutters are described below in connection with FIG. The upper wall portion 340, the lower wall portion 342, the open state outer cover 300a, and the closed state outer cover 300b will be described later in conjunction with the description of FIG.

FIG. 3 is a peripheral perspective view of the tool recognition area 210. FIG.
A tool recognition area 210 (space) is formed in part of the machining area 200, more specifically above the holding part 104 that fixes the workpiece. As noted above, tool recognition area 210 includes camera 106 and lighting device 108 . The machining area 200 is connected to the tool storage section 130 via the tool recognition area 210 .

The outer cover 300 is a movable partition plate that closes the tool recognition area 210 . The tool recognition area 210 is closed by the outer cover 300 during machining of the workpiece. In the machining area 200 during machining, a coolant is injected to remove frictional heat between the workpiece and the tool 102 . In addition, chips of the workpiece also scatter within the machining area 200 . For this reason, by closing the tool recognition area 210 with the external cover 300 , coolant or the like is prevented from entering the tool recognition area 210 . As shown in FIG. 2 , the outer cover 300 is provided inside upper and lower walls 340 and 342 surrounding the tool recognition area 210 . An outer cover 300 may be provided on the outside of the upper wall 340 and the lower wall 342 . The outer cover 300 is movable in the X-axis direction (vertical direction). In the example of FIG. 2, the opening between the upper wall portion 340 and the lower wall portion 342 is open with the outer cover 300a positioned on the lower side. When the outer cover 300b moves upward when the tool 102 is not in the tool recognition area 210, the mouth between the upper wall 340 and the lower wall 342 is closed. By moving the outer cover 300 up and down in this way, it is possible to prevent the coolant adhering to the outer cover 300 from dropping (scattering). In the example of FIG. 3, the opening between the upper wall portion 340 and the lower wall portion 342 is open with the outer cover 300 positioned on the upper side. When the outer cover 300 moves downward when the tool 102 is not in the tool recognition area 210, the mouth between the upper wall 340 and the lower wall 342 is closed. The open state and the closed state may be changed by making the outer cover 300 movable in the Y-axis direction (horizontal direction) and moving the outer cover 300 in the Y-axis direction (horizontal direction). In addition, the external cover 300 can be moved in the X-axis direction (vertical direction) and the Y-axis direction (horizontal direction), and the external cover 300 can be simultaneously moved in the X-axis direction (vertical direction) and the Y-axis direction (horizontal direction). You may change an open state and a closed state by .

When instructed to inspect the tool by a measurement command or the like, the machine tool 100 stops machining the workpiece. At this time, the machine tool 100 also stops injection of coolant. Next, the spindle moves the tool 102 to a predetermined position (hereinafter referred to as "standby position") in front of the tool recognition area 210, and rotates the tool 102 at the standby position at high speed. By rotating the tool 102 at high speed, the coolant and chips adhering to the tool 102 (hereinafter collectively referred to as "deposits") are shaken off. Hereinafter, rotating the tool 102 at a high speed to remove deposits at the standby position will be referred to as "cleaning rotation".

After the cleaning rotation, the outer cover 300 opens to allow the tool to enter the tool recognition area 210 . Tool inspection is performed by imaging the tool 102 inserted into the tool recognition area 210 with the camera 106 .

As described above, machining area 200 is connected to tool storage section 130 via tool recognition area 210 . Therefore, when changing tools, the spindle is inserted deep into the tool recognition area 210 . Since the tool passes through the tool recognition area 210 not only during tool inspection but also during tool replacement, the cleaning rotation may be similarly performed before passing.

4 is a side sectional view of each mechanism in the tool recognition area 210. FIG.
Tool 102 is inserted intermediate camera 106 and illumination device 108 . A secondary lighting device 308 is also installed on the side of the camera 106 to illuminate the tool 102 from below. A first shutter 304 is installed next to the camera 106 to cover the light receiving surface of the camera 106 . The first shutter 304 can move between an open state that opens the light receiving surface of the camera 106 and a closed state that closes the light receiving surface. A second shutter 306 for covering the light emitting surface of the lighting device 108 is installed next to the lighting device 108 . The second shutter 306 can move between an open state in which the light emitting surface of the lighting device 108 is opened and a closed state in which the light emitting surface is closed. Hereinafter, when the first shutter 304 and the second shutter 306 are collectively referred to as "internal shutter".

The first shutter 304 is rotatably mounted around the Z axis and driven to rotate. A first cylinder 305 connected to the first shutter 304 expands and contracts, for example, by operating a built-in solenoid. The first shutter 304 closes the light receiving surface of the camera 106 when the first cylinder 305 is extended, and opens the light receiving surface of the camera 106 when the first cylinder 305 is retracted.

The second shutter 306 is rotatably mounted around the Z axis and driven to rotate. A second cylinder 307 connected to the second shutter 306 expands and contracts, for example, by operating a built-in solenoid. The second shutter 306 closes the light emitting surface of the lighting device 108 with the second cylinder 307 extended, and the second shutter 306 opens the light emitting surface of the lighting device 108 with the first cylinder 305 contracted.

When starting tool inspection, both the first shutter 304 and the second shutter 306 are opened. When ending tool inspection, the first shutter 304 and the second shutter 306 are closed. The same applies to the start and end of tool registration.

In the tool inspection, the tool 102 is imaged by the camera 106 while the tool 102 is illuminated from above by the illumination device 108 . Therefore, an open instruction signal is transmitted to both the first shutter 304 and the second shutter 306 .

Also, during tool change, the spindle 116 enters the tool recognition area 210 deeper than during tool inspection. At this time, if the internal shutter is open, the internal shutter may interfere with the main shaft 116 . That is, the first shutter 304 is installed at a position within the movable range of the tool changer 126 when the first shutter 304 is open. Further, the second shutter 306 is installed at a position within the movable range of the tool changer 126 when the second shutter 306 is open. Since neither the camera 106 nor the illumination device 108 is used during tool change, the internal shutter is closed. After finishing the tool inspection, a closing instruction signal is sent to the first shutter 304 and the second shutter 306 .

In this embodiment, in particular, the possibility of interference between the internal shutter and the tool changer 126 is considered. The tool changer 126 changes the tool of the mounting portion (in this example, the spindle). A position P shown in FIG. 4 indicates the position of the tool 102 during tool change. The tool changer 126 grips or releases the tool 102 by rotating. A trajectory R shown in FIG. 4 indicates a rotational trajectory of the end portion of the tool changer 126 . The inner side of the trajectory R indicates the working range of the tool changer 126 . The operating range of the tool changing section 126 is a region through which the tool changing section 126 moves during the tool changing operation. Movement of the tool changer 126 includes rotary motion. The tool changer 126, particularly its tip, can also interfere with either the first shutter 304 or the second shutter 306 when they are open. Therefore, when either one of the first shutter 304 and the second shutter 306 is open, the tool changer 126 does not change tools.

FIG. 5 is a diagram showing the back side of the cover surface of the first shutter 304. As shown in FIG.
As shown in FIG. 4, the first sensor 314 is installed at a position behind the covering surface of the first shutter 304 when the light receiving surface of the camera 106 is open. A first sensor 314 detects the open state of the first shutter 304 . The first sensor 314 is, for example, a limit switch. When the first cylinder 305 is extended and the first shutter 304 is closed, nothing hits the first sensor 314 . When the first cylinder 305 contracts and the first shutter 304 opens, the back surface of the first shutter 304 comes into contact with the tip of the first sensor 314 . A region 318 indicated by a hatched pattern in FIG. 5 indicates a portion of the back surface of the cover surface of the first shutter 304 with which the tip of the first sensor 314 abuts. The first sensor 314 detects that the first shutter 304 is open when the tip that hits the area 318 is pushed. That is, if the limit switch is OFF, it means that the first shutter 304 is closed, and if the limit switch is ON, it means that the first shutter 304 is open. In this way, the first sensor 314 of the limit switch is installed at a position where the back side of the lid covering the light receiving surface of the camera 106 contacts the first shutter 304 in the closed state when the first shutter 304 is in the open state. .

Similarly, a second sensor 316 is installed at a position behind the cover surface of the second shutter 306 when the light emitting surface of the lighting device 108 is open. A second sensor 316 detects the open state of the second shutter 306 . Second sensor 316 is, for example, a limit switch. When the second cylinder 307 is extended and the second shutter 306 is closed, nothing hits the second sensor 316 . When the second cylinder 307 contracts and the second shutter 306 opens, the back surface of the second shutter 306 comes into contact with the tip of the second sensor 316 . The second sensor 316 detects that the second shutter 306 is open when the tip of the second sensor 316 in contact with the back surface of the second shutter 306 is pushed. That is, if the limit switch is OFF, it means that the second shutter 306 is closed, and if the limit switch is ON, it means that the second shutter 306 is open. In this way, the second sensor 316 of the limit switch is installed at a position where the back side of the cover portion covering the light emitting surface of the illumination device 108 contacts the second shutter 306 in the closed state when the second shutter 306 is in the open state. there is

FIG. 6 is a hardware configuration diagram of the machine tool 100 and the image processing device 110. As shown in FIG.
Machine tool 100 includes an operation controller 120 , a machining controller 122 , a machining device 124 , a tool changer 126 and a tool storage 130 . A machining control device 122 functioning as a numerical control device transmits control signals to the machining device 124 according to a machining program. The machining device 124 moves the spindle 116 according to instructions from the machining control device 122 to machine the workpiece. The processing control device 122 includes a shutter detection unit that performs processing for detecting the open state of the first shutter 304 using the first sensor 314 and processing for detecting the open state of the second shutter 306 using the second sensor 316. 330.

Operation controller 120 includes console 206 and controls process controller 122 . The tool storage section 130 stores the tools 102 . The tool changer 126 corresponds to a so-called ATC (Automatic Tool Changer). The tool exchange unit 126 takes out the tool 102 from the tool storage unit 130 according to the exchange instruction from the machining control device 122 and exchanges the tool 102 on the spindle 116 with the taken out tool 102 .

The operation control device 120 includes a shutter control section 320 . Shutter control unit 320 opens and closes external cover 300 and internal shutters (first shutter 304 and second shutter 306).

The image processing device 110 mainly performs image processing such as tool shape recognition. As mentioned above, the image processing device 110 may be configured as part of the operation control device 120 . The image processing device 110 may be a general laptop PC (Personal Computer) or tablet computer.

The image processing device 110, the operation control device 120, and the processing control device 122 include hardware including computing units such as processors, storage devices such as memory and storage, and wired or wireless communication lines connecting them, and storage devices. Software and programs that are stored and supply processing instructions to the computing unit are implemented on an operating system separate from the image processing apparatus 110 .

FIG. 7 is a flow chart showing the process for tool change.
When the machining control device 122 detects a predetermined tool change command in the machining program, the process shown in FIG. 7 is started.

The shutter detection unit 330 acquires detection results regarding the first shutter 304 from the first sensor 314 . When the shutter detection unit 330 determines that the first sensor 314 has detected the open state of the first shutter 304 (Y in S10), the processing control device 122 does not change the tool. That is, the machining control device 122 interrupts the execution of the NC program before instructing the tool changer 126 to change the tool.

As recovery when the execution of the NC program is interrupted, the machining control device 122 warns the operator that the tool cannot be changed because the first shutter 304 is open. Specifically, the processing control device 122 causes the image processing device 110 or the operation panel 206 to output the warning. The operator operates the image processing device 110 or the operation panel 206 to command the shutter control section 320 to close the first shutter 304 . The shutter control unit 320 operates the first cylinder 305 according to this command to close the first shutter 304 . Alternatively, the processing control device 122 may automatically instruct the shutter control section 320 to close the first shutter 304 . The operator may manually close the first shutter 304 .

After the execution of the NC program is interrupted in S12, the shutter detection unit 330 repeats the determination of S10 and waits until the first sensor 314 no longer detects the open state of the first shutter 304, that is, until it becomes closed (S10 of N).

When the shutter detection unit 330 determines that the open state of the first shutter 304 is not detected by the first sensor 314 in the first process of S10, that is, it is determined that the first shutter 304 is closed, or the first shutter 304 is is closed, the process proceeds to S14.

The shutter detection unit 330 acquires detection results regarding the second shutter 306 from the second sensor 316 . When the shutter detection unit 330 determines that the second sensor 316 has detected the open state of the second shutter 306 (Y of S14), the processing control device 122 does not change the tool. That is, the machining control device 122 interrupts the execution of the NC program before instructing the tool changer 126 to change the tool.

As a recovery when the execution of the NC program is interrupted, the processing control device 122 notifies the operator that the tool cannot be changed because the second shutter 306 is open, as in the case of the first shutter 304. . As in the case of the first shutter 304 , the operator operates the image processing device 110 or the operation panel 206 to command the shutter control section 320 to close the second shutter 306 . Alternatively, the processing control device 122 may automatically instruct the shutter control section 320 to close the second shutter 306 . The shutter control unit 320 operates the second cylinder 307 according to this command to close the second shutter 306 . The operator may manually close the second shutter 306 .

After interrupting the execution of the NC program in S16, the shutter detection unit 330 repeats the determination in S14 and waits until the second sensor 316 no longer detects the open state of the second shutter 306 (N in S14).

When the shutter detection unit 330 determines that the open state of the second shutter 306 is not detected by the second sensor 316 in the first process of S14, that is, it is determined that the second shutter 306 is in the closed state, or the second shutter 306 is detected by recovery from interruption as described above. is closed, the process proceeds to S18.

After confirming that neither the first shutter 304 nor the second shutter 306 is open in this manner, the processing control device 122 instructs the tool changing section 126 to change tools (S18).

In other words, when the first sensor 314 does not detect the open state, the tool changer 126 moves to attach the tool 102 to the attachment (in this example, the main shaft 116). Further, in the machine tool 100, when the second sensor 316 does not detect the open state, the tool changer 126 is moved to attach the tool 102 to the attachment.

[Modification]
The shutter detection unit 330 may instruct the camera 106 to capture an image, and may detect the closed state of the first shutter 304 when the captured image is dark and nothing is captured. Further, the shutter detection unit 330 may further detect the open state of the second shutter 306 if the captured image is bright. If the brightness of the captured image is higher than the reference value, it means that the lighting device 108 is lighting, so the shutter detection unit 330 can also detect the open state of the second shutter 306 .

In addition, calibration work of the camera 106 may be performed after tool replacement. For this purpose, the numerical control device (for example, the processing control device 122) stores calibration information for the camera 106 and the lighting unit (for example, the lighting device 108). It may be in the form of The calibration information is information such as the initial installation position of the fixed portion to which the camera 106 is fixed, the mechanical coordinates corresponding to the initial installation position of the fixed portion to which the camera 106 is fixed, the center position of the lens of the camera 106, and the like. The image processing device 110 calculates the deviation from the initial installation position of the camera 106 based on the image captured before the tool change, and when the amount of deviation exceeds a certain value, the camera 106 is refixed or Notify when replacement is required. Similarly, the image processing device 110 calculates the deviation from the initial installation position of the lighting unit based on the image captured before tool replacement, and if the amount of deviation exceeds a certain value, the lighting unit Notification of re-fixation etc. is performed.

[Reference example]
FIG. 8 is a side sectional view of each mechanism in the tool recognition area in the reference example.
Cylinder sensors may be used as the first and second sensors. A first cylinder sensor 324 provided in the first cylinder 305 that drives the first shutter 304 is used instead of the limit switch illustrated in the embodiment. The first cylinder sensor 324 detects the closed state of the first shutter 304 when the first cylinder 305 is extended, and detects the open state of the first shutter 304 when the first cylinder 305 is retracted. Similarly, a second cylinder sensor 326 provided in the second cylinder 307 that drives the second shutter 306 is used instead of the limit switch illustrated in the embodiment. The second cylinder sensor 326 detects the closed state of the second shutter 306 when the second cylinder 307 is extended, and detects the open state of the second shutter 306 when the second cylinder 307 is retracted.

FIG. 9 is a side view of tool recognition area 210 in an example implementation of machine tool 100 .
A work spindle 105 is rotatably supported by a headstock 170 , and a camera 106 is fixed to the headstock 170 . An arm 172 that supports the illumination device 108 is provided above the headstock 170 . During tool inspection, an imaging target portion (portion to be imaged for inspection) of the tool 102 is arranged in the inspection area 212 . When viewed along the vertical line L1 (or when viewed from above the vertical line L1), the illumination device 108 and the second shutter 306 emit light at an inclination angle θ such that they have a positional relationship that does not overlap the camera 106. The axis L2 is tilted (see the two-dot chain line parallel to the vertical line L1 in the figure). By inclining the optical axis L2, the tool 102 is moved to a position away from the arm 172 fixing the illumination device 108, so it is possible to image the tool 102 having a large tool diameter.

As illustrated, when the second shutter 306 of the illumination device 108 is open, the tool changer 126 hits the second shutter 306 during the tool change operation. On the other hand, when the second shutter 306 of the illumination device 108 is closed, the tool changing section 126 does not hit the second shutter 306 during the tool changing operation.

It should be noted that the present invention is not limited to the above-described embodiments and modifications, and can be embodied by modifying constituent elements without departing from the scope of the invention. Various inventions may be formed by appropriately combining a plurality of constituent elements disclosed in the above embodiments and modifications. Also, some constituent elements may be deleted from all the constituent elements shown in the above embodiments and modifications.

REFERENCE SIGNS LIST 100 machine tool 102 tool 104 holder 106 camera 108 lighting device 110 image processing device 112 blade 114 shank 116 spindle 118 holder 120 operation control device 122 processing control device 124 processing device , 126 tool exchange unit, 130 tool storage unit, 138 display unit, 200 processing area, 202 cover, 204 door, 206 operation panel, 210 tool recognition area, 300 external cover, 304 first shutter, 305 first cylinder, 306 second 2 shutter, 307 second cylinder, 308 auxiliary lighting device, 314 first sensor, 316 second sensor, 320 shutter control section, 324 first cylinder sensor, 326 second cylinder sensor, 330 shutter detection section, 340 upper wall portion, 342 lower wall

Claims (4)

a mounting portion that can be moved by mounting a tool;
a tool exchange part for exchanging tools for the mounting part;
an imaging unit configured to capture an image of the tool attached to the attachment unit;
a shutter capable of moving between an open state in which the light receiving surface of the imaging unit is opened and a closed state in which the light receiving surface is closed;
a sensor that detects the open state of the shutter;
The shutter is installed at a position within a movable range of the tool changer in the open state of the shutter,
A machine tool according to claim 1, wherein said tool changer moves to mount said tool on said mounting portion when said sensor does not detect said open state. 2. The sensor according to claim 1, wherein said sensor is a limit switch, and is installed at a position where said shutter in said closed state contacts the rear side of a cover portion covering said light receiving surface when said shutter is in said open state. Machine Tools. a mounting portion that can be moved by mounting a tool;
a tool exchange part for exchanging tools for the mounting part;
an illumination unit that illuminates the image of the tool;
a shutter capable of moving between an open state in which the light emitting surface of the illumination unit is opened and a closed state in which the light emitting surface is closed;
a sensor that detects the open state of the shutter;
The shutter is installed at a position within a movable range of the tool changer in the open state of the shutter,
A machine tool according to claim 1, wherein said tool changer moves to mount said tool on said mounting portion when said sensor does not detect said open state. 4. The sensor according to claim 3, wherein the sensor is a limit switch, and is installed at a position where the shutter in the closed state contacts the rear side of the lid portion that covers the light emitting surface in the open state of the shutter. Machine Tools.

Images