JP4975555B2 - Machine tool operation control method and machine tool - Google Patents

Description

  The present invention relates to an operation control method for a machine tool such as a lathe and a machine tool.

  A machine tool such as a lathe is provided with a large number of actuators. Some of these actuators, once instructed by a machining program or the like, continue to operate until a next stop instruction is issued.

  Further, Patent Document 1 relating to a safety device for an industrial machine discloses a technique for stopping the operation in response to the operation of the switch and restarting the operation in response to the release of the operation of the switch. Technology cannot simply be applied. That is, in the machine tool, as described in Patent Document 1, even if all the actuators are stopped during the execution of the machining program and then the machining program is restarted, the operation of the actuator that continues the above operation remains stopped. Therefore, if the activation command for the actuator is not described in the resumed program, the actuator that has been stopped continues to be stopped. Therefore, in such a case, the machine tool may be damaged, for example, when the spindle does not rotate and contacts the tool.

  In general machine tools, the machining program can be stopped in one cycle or block unit. However, even during this stop, the machine tool has a mode to continue the operation of the actuator such as the spindle. It has been. This mode is generally called a setup mode. In the setup mode, even if the actuator start command is not described in the machining program to be executed after the machining operation is resumed, the operating state of the actuator is maintained, so that the trouble that the machine tool is damaged can be avoided. There is also an advantage that the machining operation can be restarted quickly without stopping the actuator.

By the way, the cover that covers the machined portion of the machine tool is provided with an interlock that permits opening on the condition that operation of several actuators such as a spindle is stopped in consideration of the safety of the operator. When opening the cover, the operator selects the setup mode and then operates a stop switch for each actuator provided in the machine tool. Then, by stopping all actuators related to the interlock, the interlock release condition is satisfied, and then the cover is opened. It is necessary to perform inspections and setup changes with the cover open, close the cover, and restart all the actuators that have been stopped to release the interlock before restarting the program.
JP-A-1-229200

  When the actuators are activated, it is necessary for the worker to remember the plurality of actuators whose operation has been stopped, and to accurately operate the activation switches corresponding to those actuators. Therefore, the operation for resuming the operation of the actuator becomes extremely complicated, and it is difficult to properly restart the actuator whose operation has been stopped, and an operation error is likely to occur. If you accidentally activate an unnecessary actuator, or if you forget to activate a necessary actuator, unintended situations such as interference between the workpiece and the tool or collision may occur and the machine tool may be damaged. was there.

  The present invention has been made paying attention to such problems existing in the prior art. An object of the present invention is to provide a machine tool operation control method and a machine tool that can stop a plurality of actuators with a simple operation and can accurately resume the operation of these actuators without causing an operation error. There is.

In the invention of claim 1 according to the operation control method of the machine tool, and continues a processing mode for executing a machining program sequentially by an instruction switching instruction means, the operation of the plurality of actuators in a state of stopping the execution of the machining program In the operation control method of the machine tool for switching between the setup mode, in the setup mode, the operation of the stop instruction means is performed for the actuator that permits the opening of the cover that covers the processing portion at least on the condition that the operation is stopped among the plurality of actuators. in response to the stop request accompanying with the operation stop of the actuator, the information of the previous operation state information and the actuator identifies the actuator the operation is stopped is stopped is stored in the storage means of the machine tool, requesting resumption of operation of the actuator the operation is stopped Depending on the resume request from the dynamic instruction means, it is characterized by resuming the operation of the stored said actuator.

  In this way, when the stop instructing unit is operated in a state where the execution of the machining program is stopped, a plurality of actuators that are continuing to operate are collectively stopped in response to a stop request from the stop instructing unit. Is done. At the same time, the type of each actuator whose operation is stopped and the state before the actuator is stopped are stored in the storage means. When the stop request is canceled by the operation of the start instruction unit, the operations of the plurality of actuators are restored to the state before the stop according to the type and state of the actuator stored in the storage unit. Therefore, it is possible to stop a plurality of actuators in operation in a short time with a simple operation. In addition, it is not necessary to remember the types and states of the plurality of actuators that have been stopped, and the actuators can be accurately restarted with a simple operation without fear of an operation error.

The invention of claim 2 is characterized in that, in the invention of claim 1 , the stop request is made by a stop instruction means provided separately from the switching instruction means on the operation panel. Thus, it is possible to obtain the same effect as claim 1.

According to a third aspect of the present invention, in the first aspect of the present invention, the stop request is made by a stop instructing means that is switched by opening a cover that covers the processing portion. Thus, it is possible to obtain the same effect as claim 1.

In a fourth aspect of the invention relating to a machine tool, a machining mode in which a machining program is continuously executed in accordance with an instruction from the switching instruction means, and a setup in which the operations of a plurality of actuators are continued in a state where the execution of the machining program is stopped. In a machine tool that switches between modes , in the setup mode in which execution of the machining program is stopped , the operation of an actuator that permits the opening of the cover that covers the machining portion at least on the condition that the operation is stopped among the plurality of actuators. of a stop instruction means for requesting a stop, in response to the stop request from the stop instruction means, a and stopping means for stopping the operation of the actuator the stop of the operation is required, the operation by the stopping means is stopped actuator the information of the previous operating state specific information and said actuator is stopped And憶storing means, an actuator and activation instruction means for the operation requests resumption of operation of the actuator is stopped, the start said operation stored in said storage means in response to resume request from the instructing means is stopped And restarting means for restarting the operation.

  Therefore, in the machine tool according to the present invention, when the stop instruction means is operated in a state where the execution of the machining program is stopped by switching to the setup mode in which the operations of the plurality of actuators are continued, the stop instruction means In response to a stop request from, a plurality of actuators that are continuing to operate are stopped at once. At the same time, the type of each actuator whose operation is stopped and the state before the actuator is stopped are stored in the storage means. Then, when the stop request is canceled by the operation of the start instruction unit or the like, the operations of the plurality of actuators are restored to the state before the stop according to the type and state of the actuator stored in the storage unit. Therefore, it is possible to stop a plurality of actuators that are in operation in a short time with a simple operation in the setup mode setting state. In addition, it is not necessary to remember the types and states of the plurality of actuators that have been stopped, and the actuators can be accurately restarted with a simple operation without fear of an operation error.

The invention of claim 5 is characterized in that, in the invention of claim 4 , the stop instruction means is provided on the operation panel separately from the switching instruction means.
With this configuration, a plurality of actuators that are continuously operating in the setup mode setting state can be collectively collected by simply operating a stop instruction means provided separately from the changeover switch on the operation panel. Can be stopped.

The invention according to claim 6 is characterized in that, in the invention according to claim 4 , the stop instructing means requests the stop of the operation by opening a cover covering the processing portion.
If comprised in this way, the several actuator in operation can be stopped collectively by simple operation of opening the cover of a process part.

  As described above, according to the present invention, it is possible to stop a plurality of actuators with a simple operation, and it is possible to accurately resume the operation of these actuators without fear of an operation error. .

(First embodiment)
Below, 1st Embodiment of this invention is described based on FIGS. 1-4.
As shown in FIG. 1, in the machine tool of this embodiment, a machining unit (not shown) is provided inside the machine body 11. In the processing part, a known spindle such as a spindle that supports the workpiece in a detachable manner, a tool rest that supports a plurality of tools, a coolant supply mechanism that supplies coolant onto the workpiece, and other known movable parts, and those movable parts are driven. An actuator such as a motor is provided. Although not shown in the figure, the actuator is a pump motor for supplying low-pressure coolant, a pump motor for supplying high-pressure coolant, a switching valve solenoid for a chuck cylinder (not shown) for chucking a workpiece, and air for air blowing. There are a supply pump motor, a motor for applying a feed torque to a feed arrow of a material feeder, a motor for a workpiece transfer conveyor, a motor for a chip transfer conveyor, and the like. In the machine tool of this embodiment, a machining mode and a setup mode are set. The machining mode is a mode in which various types of actuators are operated by a machining program and machining on a workpiece is executed. The setup mode is a mode in which the continuous operation of the machining program is forcibly stopped in order for the operator to change the setup, inspect the machining unit, or the like. In the present embodiment, the operation is continued until the end of one cycle even after the setup mode is selected, and the operation is stopped when the operation of one cycle is completed. In this setup mode, until the door opening ready button 22 is operated, all the continuously operated actuators that have been commanded to operate continue to operate. Examples of the actuator that continues this operation include a rotary tool drive motor, a high-pressure coolant pump motor, a low-pressure coolant pump motor, a chip conveying conveyor motor, a chuck opening / closing cylinder, and a spindle motor 38 (not shown). In the setup mode, the cover cannot be opened until the actuator related to the interlock with the cover described later is stopped. As this related actuator, there are a related actuator 39 such as a rotary tool drive motor, a high-pressure coolant motor, a chip conveying conveyor motor, a spindle motor 38 and the like.

  A cover 12 that covers the processing part is attached to the upper right side of the machine body 11 in the figure so as to be openable and closable. A viewing window 13 is provided on the upper surface of the cover 12 so that the processed portion can be seen through from the outside, and a handle 14 for opening and closing is projected on the front surface of the cover 12.

  Corresponding to the cover 12, a door lock device 15 is disposed in the machine main body 11. The door lock device 15 includes a lock portion 15a that locks the cover 12 in a closed state, and a switch portion 15b that detects the lock state of the lock portion 15a. Normally, the cover 12 is locked by the lock portion 15a in the closed state so that the cover 12 is not opened carelessly. Further, the lock is released by operating a door opening ready button 22 described later. Further, when the cover 12 is opened, the actuators of the respective movable parts are interlocked in the stopped state based on the detection of the switch part 15b so that the actuators of the respective movable parts such as the main shaft in the processing part are not operated. The

  In the vicinity of the door lock device 15, a cover opening / closing sensor 16 is disposed in the machine main body 11. When the cover 12 is in a closed state or an open state, this state is detected by the cover opening / closing sensor 16.

  As shown in FIGS. 1 and 2, an operation panel 17 is disposed on the upper left side of the machine body 11. An input key 18 composed of a plurality of numerical keys and the like is arranged in the center of the front surface of the operation panel 17. A plurality of select switches (buttons) 19 corresponding to the actuators of the movable parts such as the main shaft are arranged on the right side of the front surface of the operation panel 17. These select switches 19 are provided with lamps (not shown) that are turned on when the switch is turned on.

  A display unit 20 made of a display device such as a liquid crystal display is disposed on the left side of the front surface of the operation panel 17. Then, the data input from the input keys 18 on the operation panel 17, the machining program, the setting state of the machine tool, and the like are displayed on the display unit 20.

  At the lower part of the front surface of the operation panel 17, a mode changeover switch 21 as a switching instruction means, a door open ready button (switch) 22 as a stop instruction means, a start button (switch) 23 as a start instruction means, a block stop button ( A switch) 24 and a door openable indicator lamp 25 are provided. The door opening ready button 22, the start button 23, and the block stop button 24 are provided with lamps (not shown) that are turned on when the on operation is performed.

The mode changeover switch 21 is used when switching between a machining mode for machining a workpiece by executing a machining program and a setup mode.
The door opening ready button 22 collectively stops the actuators of a plurality of movable parts that continue to operate in a state where the setup mode is set and the execution of the machining program is stopped by switching the mode changeover switch 21. When it is made to press, it is pressed. The start button 23 is operated when the machining of the workpiece is started by executing the machining program in the machining mode setting state, or when the operation of the actuators in the plurality of stopped movable parts is resumed in the setting mode of the setup mode. Is done.

  The block stop button 24 is operated when it is desired to forcibly stop at the operation end state of one block of the machining program. The door openable display lamp 25 is lit when the operation of the actuator in all the movable parts related to the interlock of the cover 12 is stopped and the cover 12 can be opened by setting the setup mode. The

Next, the control device 31 for controlling the machine tool configured as described above and the related configuration will be described.
As shown in FIG. 3, the control device 31 includes a CPU (Central Processing Unit) 32, a ROM (Read Only Memory) 33, and a RAM (Random Access Memory) 34. The RAM 34 stores various machining programs and data for machining the workpiece. The ROM 33 stores a program for controlling the spindle motor 38, the related actuator 39, and the like in sequence. The CPU 32 controls the execution of the machining program stored in the RAM 34 and the sequence program stored in the ROM 33.

  The CPU 32 receives operation command signals from the mode changeover switch 21, the door open ready button 22, the start button 23, etc. on the operation panel 17, and the CPU 32 outputs a lighting command signal for the door openable display lamp 25. To do. Further, the CPU 32 outputs an operation command signal for the lock unit 15 a of the door lock device 15, and a detection signal is input to the CPU 32 from the switch unit 15 b of the door lock device 15 and the cover opening / closing sensor 16.

  The CPU 32 outputs an operation command signal to the servo motor amplifier 35 to operate a servo motor 36 as an actuator that relatively feeds and moves the headstock and the tool post. Further, the CPU 32 operates a spindle motor 38 as an actuator for rotating the spindle by outputting an operation command signal to the amplifier 37 for the spindle motor. Further, the CPU 32 outputs operation command signals for the related actuators 39 including the rotary tool driving motor, the coolant motor, the chip conveying motor and the like described above to operate the actuators 39.

  In this embodiment, the CPU 32, ROM 33 and RAM 34 constitute stop means and restart means. The RAM 34 constitutes storage means.

  When the door opening ready button 22 is turned on in a state where the setup mode is set by switching the mode changeover switch 21 and execution of the machining program is stopped, a stop request from the door opening ready button 22 is made. Based on the signal, the CPU 32 outputs stop command signals for the spindle motor 38 and related actuators 39 that are continuing to operate, and the operations are stopped collectively. At this time, information for specifying the spindle motor 38, the related actuator 39, etc. whose operation has been stopped, and information on various states such as rotation speed and moving position before the stop are stored in the RAM 34. Thereafter, when the machine tool stop request is canceled by operating the start button 23, an operation command signal is output from the CPU 32 in accordance with the type and state of the actuator stored in the RAM 34, and the operation of these actuators is performed. Resumed.

  Next, in the machine tool configured as described above, the operation of the machine tool when performing operations such as inspection of the machining unit and change of setup during execution of the machining program will be described according to the routine shown in FIG. This routine proceeds when a sequence program stored in the ROM 33 of FIG. 3 is executed under the control of the CPU 32.

  That is, when the mode change switch 21 is switched to the setup mode side in step S1 (hereinafter, “step” is omitted) in FIG. In S2, the machining program is stopped at the end of one cycle. In this case, when the block stop button 24 is turned on prior to the switching of the mode change switch 21, execution of the machining program is stopped at the end of one block in units of blocks in one cycle.

  Further, when the machining program is stopped, for example, the servo motor 36 that relatively feeds and moves the headstock and the tool post is stopped when the machining program is stopped. On the other hand, for example, the related actuators 39 such as a spindle motor 38 for rotating the spindle, a pump motor for supplying high-pressure coolant, and a conveyor motor for carrying out chips are continuously operated.

  Subsequently, in S3, it is determined whether or not the machining program is stopped. If the machining program is stopped, the program proceeds to S4 and the operation of the door opening ready button 22 is validated. It becomes a state.

In the next S5, it is determined whether or not a machine stop request has been issued by turning on the door opening ready button 22, and if so, the program proceeds to S6.
In S6, the operations of the spindle motor 38 and the related actuator 39 that are continuing the operation are stopped, the types of items to be stopped such as the spindle motor 38 and the related actuator 39 that are stopped, and before the stop. States such as the rotational speed and the moving position are stored in the RAM 34.

  Thereafter, in S7, it is confirmed whether or not the operations of the spindle motor 38 and the related actuator 39 are stopped. If the operations are stopped, the program proceeds to S8.

In S8, the lock portion 15a of the door lock device 15 shown in FIG. 1 is released, and the lock of the cover 12 covering the processing portion is released.
Next, in S9, based on the detection signal from the switch part 15b of the door lock device 15, it is confirmed whether or not the cover 12 is unlocked. If the lock is released, the program is executed in S10. Proceed to.

In S10, the door openable display lamp 25 on the operation panel 17 is turned on to indicate to the operator that the cover 12 can be opened.
In this state, in S11, the cover 12 is opened by the operator, and operations such as inspection of the processing unit and change of setup are performed.

  When the operator closes the cover 12 with the completion of the work, the closed state of the cover 12 is confirmed based on the detection signal from the cover opening / closing sensor 16 in S12, and the cover 12 is closed. In this case, the program proceeds to S13, and the operation of the start button 23 is activated.

In the next S14, it is determined whether or not the start button 23 has been pressed. In step 14, the program proceeds to S15 by operating the start button 23.
In S15, the lock portion 15a of the door lock device 15 is locked, the cover 12 is locked in the closed state, and the door openable display lamp 25 is turned off.

  Subsequently, in S16, based on the detection signal from the switch portion 15b of the door lock device 15, it is confirmed whether or not the cover 12 has been locked. If the lock has been completed, the program is executed in S17. Proceed to.

  In S17, the types of the spindle motor 38 and the related actuator 39 stored in the RAM 34 and the state before stopping are read out, and the operations of the spindle motor 38 and the related actuator 39 are resumed.

  In the next S18, it is confirmed whether or not the operation of the related actuator 39 and the like has been restored to the state before the stop. If the operation has been restored, the program proceeds to S19. Therefore, at this stage, the normal machining program can be executed again.

  In S19, the machining program is restarted from the stopped state, and machining of the workpiece is resumed according to the machining program. In the present embodiment, the machine tool performs a machining operation for only one cycle by restarting the machining program in S19. However, if the machining mode is selected by operating the mode changeover switch 21, the machine tool returns to the machining mode. Multiple cycles of machining are performed by continuous operation.

  As described above, in the machine tool of this embodiment, the door opening ready button 22 is turned on in a state where the machine tool is switched to the setup mode by the operation of the mode switch 21 and the execution of the machining program is stopped. As a result, the operations of the spindle motor 38 and the related actuator 39 that are continuing to operate can be collectively stopped. Therefore, unlike the conventional method, there is no need to perform the troublesome operation of individually operating select switches corresponding to the actuators that are continuing to stop the operation of those actuators, and operating the door opening ready button 22. It is possible to stop the related actuator 39 and the like that are in operation in a short time by a simple operation. As a result, operations such as inspection of the processing unit and change of the setup can be quickly performed.

  In this machine tool, when the operations of the related actuators 39 and the like are collectively stopped, the type of the actuator to be stopped and the state such as the number of rotations before the actuators are stopped are stored in the RAM 34. When the machine stop request is canceled by operating the start button 23, the operation of the actuators is resumed according to the actuator type and state data stored in the RAM 34. Therefore, it is not necessary to remember the types and states of a plurality of stopped actuators in the setup mode setting state, and these actuators can be restarted accurately with a simple operation without fear of an operation error. .

(Second Embodiment)
Next, a second embodiment of the present invention will be described with a focus on differences from the first embodiment.
In the second embodiment, the door-open ready button 22 and the door-openable display lamp 25 on the operation panel 17 in the first embodiment are omitted. In the second embodiment, instead of the door opening ready button 22 of the first embodiment, a cover opening / closing sensor 16 provided in the opening / closing portion of the cover 12 is used to continue the operation in the setup mode setting state. Stop instruction means for stopping all of them is configured.

In the machine tool according to the second embodiment, when an operation such as inspection of the machining unit or change of setup is performed during the execution of the machining program, the operation proceeds according to the routine shown in FIG.
In the routine of FIG. 5, the operations of S4a, S5a and S15a are different from the operations of S4, S5 and S15 in the routine of the first embodiment of FIG. 4, and S7 to S10 in the routine of the first embodiment of FIG. The operation of is omitted.

  That is, also in the machine tool of the second embodiment, as in the case of the first embodiment, when the mode switch 21 is switched to the setup mode side in S1 during the execution of the machining program, the machining program in S2 Is stopped at the end of one cycle or one block. In S3, it is determined whether or not the machining program is stopped. If the machining program is stopped, the program proceeds to S4a.

In S4a, the lock portion 15a of the door lock device 15 is released, and the lock of the cover 12 covering the processing portion is released.
Thereafter, when the cover 12 is opened by the operator, in S5a, the open state of the cover 12 is confirmed based on the detection signal from the cover opening / closing sensor 16, and when the cover 12 is opened, the program is executed in S6. Proceed to.

  In S6, as in the case of the first embodiment, the operations of the related actuators 39 and the like that are continuing the operation are stopped all at once, and the type of the related actuators 39 and the like that are stopped and the state before the stop Is stored in the RAM 34.

  As described above, in the second embodiment, the detection of the cover opening / closing sensor 16 as the stop instruction means accompanying the opening operation of the cover 12 causes the collective stop of the related actuators 39 that are continuing the operation and the state of the actuator and the state thereof. Memory is performed.

Subsequently, in S11, the operator performs operations such as inspection of the processing unit and change of setup.
Then, when the cover 12 is closed by the operator after the completion of the work, the closed state of the cover 12 is confirmed in S12, and then the start button 23 of the start button 23 is checked in S13, as in the case of the first embodiment. The operation is enabled. In the next S14, when the start button 23 is turned on, the program proceeds to S15a.

  In S15a, the lock portion 15a of the door lock device 15 is locked, and the cover 12 is locked in the closed state. In subsequent S16 to S19, as in the case of the first embodiment, confirmation of the lock completion of the cover 12, resumption of operation of the related actuator 39 etc., confirmation of resumption of operation of the related actuator 39, etc., and processing The program is restarted in order.

  As described above, in the second embodiment, instead of the operation of the door opening ready button 22, an actuator that continues to operate by the detection operation of the cover opening / closing sensor 16 as the stop instruction means associated with the opening operation of the cover 12. Are collectively stopped and their actuators and states are stored. Therefore, in the second embodiment, substantially the same effect as that described in the first embodiment can be obtained.

(Third embodiment)
Next, a third embodiment of the present invention will be described with a focus on differences from the first embodiment.
In the third embodiment, the door opening ready button 22 as the stop instruction means on the operation panel 17 in the first embodiment is omitted. Then, when performing operations such as inspection of the machining section or change of setup during execution of the machining program, the machining program is stopped, the related actuators 39 are collectively stopped, and stopped by switching the mode changeover switch 21 to the setup mode. Operations such as storing the type and state of the actuator are performed in order.

In the machine tool according to the third embodiment, when a work such as inspection of the machining part or change of setup is performed during the execution of the machining program, the operation proceeds according to the routine shown in FIG.
In the routine of FIG. 6, the operations of S4 and S5 in the routine of the first embodiment of FIG. 4 are omitted.

  And in the machine tool of this 3rd Embodiment, when work, such as inspection of a process part, is performed during execution of a machining program, a mode change switch is carried out in S1-S3 like the case of 1st Embodiment. The setup mode is switched by 21, the machining program is stopped, and the machining program is confirmed to stop.

  When the stop state of the machining program is confirmed in S3, the program proceeds to S6, and the operations of the related actuators 39 and the like that are continuing the operation are collectively stopped, and the related actuators 39 whose operations have been stopped are stopped. Etc. and the state before stopping are stored in the RAM 34. That is, in the third embodiment, the machining program is stopped based on the operation for switching the setup mode by the mode switch 21, and then the actuators that are continuously operating are collectively stopped and the actuators are stored in order. .

  Thereafter, in S7 to S19, operations similar to those in the case of the first embodiment are performed in order, and after completion of work such as inspection of the machining unit by the operator, the actuator stored in the RAM 34 is restarted, Execution of the machining program is resumed.

  As described above, in the third embodiment, instead of the operation of the door opening ready button 22, the mode changeover switch 21 is switched to the setup mode, so that the actuator that is continuously operating immediately after the machining program is stopped. Such operations as batch stop and storage of the type and state of the stopped actuator are sequentially performed. Therefore, also in the third embodiment, substantially the same effect as that described in the first embodiment can be obtained.

(Example of change)
It should be noted that the present invention can be embodied with the following modifications.
-As an actuator related to the interlock with the cover, that is, an actuator that cannot open the cover unless it is stopped, in the above embodiment, the rotary tool drive motor, the high-pressure coolant motor, etc. are targeted. For example, another actuator such as a low-pressure coolant motor may be added as an actuator related to the interlock.

  In S14 in the first embodiment, the program proceeds to S15 when the door opening ready button 22 is operated instead of turning on the start button 23 to resume the operation of the machine tool. Also good. Therefore, in this case, the machining mode of the machine tool is resumed regardless of which of the start button 23 and the door opening ready button 22 is turned on.

  -In 2nd Embodiment, you may provide the door openable lamp lighted with the mode switching in S1.

The front view which shows the machine tool of 1st Embodiment. The front view which expands and shows the operation panel part of the machine tool of FIG. The block diagram which shows the circuit structure of the operation control apparatus of the actuator in the machine tool. The flowchart which shows the operation control program of the actuator in the machine tool. The flowchart which shows the operation control program of the actuator in the machine tool of 2nd Embodiment. The flowchart which shows the operation control program of the actuator in the machine tool of 3rd Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Machine main body, 12 ... Cover, 15 ... Door lock device 15a ... Lock part, 15b ... Switch part, 16 ... Cover opening / closing sensor, 17 ... Operation panel, 21 ... Mode change switch as switching instruction means, 22 ... 1st The door opening ready button constituting the stop instruction means of the embodiment, 23... Start button as the start instruction means, 31... Control device, 32... CPU constituting the stop means and restart means, 33. ROM, 34 ... RAM constituting storage means, 36 ... Servo motor as actuator, 38 ... Spindle motor as actuator, 39 ... Related actuator.

Claims (6)

In a machine tool operation control method for switching between a machining mode in which a machining program is continuously executed according to an instruction from a switching instruction means and a setup mode in which the operation of a plurality of actuators is continued in a state where execution of the machining program is stopped.
In the setup mode, among the plurality of actuators, the actuators to allow opening of the cover for covering the processing unit as a condition of at least the operation stop, the operation of the actuator is stopped in response to a stop request caused by the operation of the stop instruction means together with the information before the operation state information and the actuator identifies the actuator the operation is stopped is stopped is stored in the storage means of the machine tool,
An operation control method for a machine tool, wherein the stored operation of the actuator is restarted in response to a restart request from an activation instructing unit that requests restart of the operation of the actuator whose operation has been stopped . The machine tool operation control method according to claim 1 , wherein the stop request is made by a stop instruction means provided separately from the switching instruction means on the operation panel. The operation control method for a machine tool according to claim 1 , wherein the stop request is made by a stop instructing unit that is switched by opening a cover that covers the machining portion. In a machine tool that switches between a machining mode in which a machining program is continuously executed in accordance with an instruction from the switching instruction means and a setup mode in which operations of a plurality of actuators are continued in a state where the execution of the machining program is stopped,
In the setup mode in which execution of the machining program is stopped, among the plurality of actuators, a stop instruction means for requesting to stop the operation of an actuator that permits the opening of the cover that covers the machining portion on the condition that the operation is stopped. When,
In response to a stop request from the stop instruction means, stop means for stopping the operation of the actuator requested to stop the operation;
Storage means for information and the actuator identifies the actuators the operation is stopped by said stop means for storing information of the previous operating state of stopping,
Activation instruction means for requesting resumption of operation of the actuator whose operation has been stopped ;
A machine tool comprising: restarting means for restarting the operation of the actuator, which has been stored in the storage means, in response to a restart request from the start instruction means. The machine tool according to claim 4 , wherein the stop instruction unit is provided on an operation panel separately from the switching instruction unit. The machine tool according to claim 4 , wherein the stop instructing unit requests the stop of the operation by opening a cover that covers the machining portion.

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