JP7092842B2 - Numerical control device - Google Patents

Description

The present invention relates to a numerical control device.

Conventionally, machine tools such as lathes, drilling machines, boring machines, milling machines, grinding machines, gear cutting machines / gear finishing machines, machining centers, electric discharge machines, punch presses, laser machines, conveyors and plastic injection molding machines are controlled. Control devices are known.
For example, in a laser processing system that processes a workpiece using laser light, while the control device is executing a laser processing program, abnormalities in the power supply for laser oscillation, medium (especially gas) supply, and processing points. Execution of the laser processing program may be interrupted due to an abnormality in the supply of assist gas to the laser, or in accordance with an intentional stop command by the operator, an emergency stop signal for ensuring safety, or the like.
A laser machining system is known that can resume the execution of a laser machining program at a position different from the position at the time of interruption after the execution of the laser machining program is interrupted.

In this regard, Patent Document 1 describes information on the interruption point (for example, a sequence number indicating the location of the interrupted program, a program counter, a name or number of the program, and a parent) when the machining operation is interrupted while the workpiece is being machined. The name and number of the program, information that can be used to determine from which part of the parent program it was called, and what function was executed in the interrupted block, position data, macro variable information) are used as processing restart block data. The current numerical control status is stored in the memory, the machining restart block data is used when the program is restarted, and the program is provisionally executed up to the block to be restarted ("temporary execution": the calculation process of the program that does not drive the machine is executed. It is disclosed that there is a technique for restoring and resuming the state of modal information (or functional information) and auxiliary functions.
Further, in Patent Document 1, the sequence number in the program is searched without being provisionally executed at the location of the program to be restarted, or the block of the program is counted and searched up to the processing restart block without being provisionally executed. It is also disclosed that there is a technique for moving the program to the target location at high speed and restarting the program.

Further, in Patent Document 2, in the laser processing system, the operating status of the laser processing machine when the execution of the laser processing program is interrupted is accurately determined, and the execution of the laser processing program is restarted. In order to set the restart conditions appropriately according to the operating status at the time of interruption, the operating status of the laser processing machine when the execution of the laser processing program is interrupted is actually processing the workpiece during laser processing. The restart condition of the laser processing machine (for example, the operating condition of the laser oscillator, etc.) when restarting the execution of the laser processing program according to the determination result of the operation status determination unit for determining the presence or absence and the determination result of the operation status determination unit. A numerical control device including a restart condition specifying unit that specifies a processing head position, etc.) within a predetermined condition in a laser processing program is disclosed.
By doing so, the control device described in Patent Document 2 may, for example, set the restart position to (1) the position Q4 immediately before the position Q5 where the execution of the laser processing program P is interrupted, and (2) the execution of the laser processing program P. The position Q3 of the start point of the block including the interrupted position Q5, (3) the position Q2 of the start point of the block before the block including the position Q5 where the execution of the laser processing program P is interrupted, or (4) the position of the start point Q2 of the laser processing program P. Any one of the positions Q6 of the machining start point of the machining path next to the machining path including the position Q5 where the execution was interrupted is specified as the restart condition C, and the machining is performed at any of the specified positions (1) to (4). It is possible to control the movement of the head 34 and automatically restart the laser processing machine according to other restart conditions necessary for resuming processing such as operating conditions of the laser oscillator.

As described above, in the conventional numerical control device, for example, the user searches for the sequence number in the machining program, or counts the blocks of the program and searches up to the machining restart block without tentative execution. Then, it can be moved to the target part of the program at high speed and restarted. Further, after the restart position is set based on the position where the execution of the laser machining program P is interrupted, the machining head is controlled to move, and other restart conditions necessary for restarting machining such as the operating condition of the laser oscillator are performed. The laser machine can be restarted automatically according to the procedure.

Japanese Unexamined Patent Publication No. 2010-044489 JP-A-2015-208775

When restarting the machining program after interrupting the execution of the conventional machining program, for example, the operator needs to search the machining program in order to set the block to be restarted based on the block number of the machining program at the time of interruption or the like. there were.
However, since the block to be restarted is set by searching the machining program itself, there are many operation procedures related to restarting the machining program for the operator, and for the operator, the block set as the restart position is the actual machining path. It was difficult to intuitively grasp where to restart.

In the present invention, when the machining is restarted after the execution of the machining program is interrupted, the operator displays the program restart position candidate on the machining path displayed on the display, so that the restart position candidate is the actual machining path. It is possible to visually grasp where to restart machining, and by setting the restart position from the restart position candidates displayed on the machining path, there are few steps to restart machining. It is an object of the present invention to provide a numerical control device.

The numerical control device according to the present invention (for example, "numerical control device 100" described later) analyzes a display (for example, "display 170" described later) for displaying a machining path drawing screen and a machining program before machining. A machining program analysis unit (for example, "machining program analysis unit 121" described later) and an unprocessed path drawing unit that draws an unprocessed machining path on the machining path drawing screen based on the analysis result of the machining program (for example, a machining program analysis unit 121). For example, a restart position candidate setting unit (for example, described later) that stores information of a block that is a candidate for a restart position for restarting machining based on the analysis result of the machining program and the “raw path drawing unit 122” described later). "Restart position candidate setting unit 123"), and the processing drawing unit (for example, "processing drawing unit 124" described later) that displays the current position of each moment during processing, and the processing is interrupted. In this case, the machining path drawing screen displays the machining position corresponding to the beginning of the block that is a candidate for the restart position stored by the restart position candidate setting unit and the machining position corresponding to the beginning of the interrupted block in which machining is interrupted. A block head position drawing unit (for example, "block head position drawing unit 125" described later) that draws on the processing path displayed in the above and displays the entire path of the restarting block in a color different from that of other processing paths. ) And the restart block setting unit (for example, "restart block setting" described later) that sets the block corresponding to the processing position specified by the user from the processing positions drawn by the block head position drawing unit as the restart block. In response to the restart instruction from the user based on the restart block set by the restart block setting unit, the preparation program for setting the modal and / or auxiliary functions necessary for restarting the machining is automatically performed. A restart control unit (for example, “restart control unit 127” described later) to be executed is provided.

(2) In the numerical control device according to (1), the restart position candidate setting unit (for example, "restart position candidate setting unit 123" described later) is a stop block and a subprogram call command as candidates for the restart position. Among blocks including, a block including a macro call command, a block including a macro modal call command, a block containing a G code command for enabling a predetermined function, a block containing an M code command, a block containing a B code command, and a positioning block. At least one or more types of blocks may be candidates.

(3) In the numerical control device according to (1) or (2), the machining drawing unit (for example, "machining drawing unit 124" described later) is currently being machined on the machining path. The position may be overlaid on the raw processing path drawn by the restart position candidate setting unit.

(4) In the numerical control device according to (1) to (3), when the machining program is a laser machining program, the restart position candidate setting unit (for example, "restart position candidate setting unit 123" described later) may be used. Candidates for the restart position include a break block, a block including a subprogram call command, a block including a macro call command, a block including a macromodal call command, a block including a G code command for enabling a predetermined function, and an M code command. , A block including a B code command, a positioning block, a block including a piercing command, a block including a gap control command, and a block including an assist gas command, at least one type of block may be a candidate.

(5) In the numerical control device according to (1) to (4), when the machining program is a laser machining program, the restart control unit includes a piercing command for the restart block set by the restart block setting unit. In the case of a block, a block including a gap control command, or a block containing an assist gas command, the piercing command, the gap control command, or the preparation program related to the assist gas command is automatically executed in response to a restart instruction from the user. You may do it.

According to the present invention, when the machining is restarted after the execution of the machining program is interrupted, the restart position candidate is actually displayed by the operator on the machining path displayed on the display. The procedure for restarting machining by setting the restart position from the restart position candidates displayed on the machining path while making it possible to visually grasp where in the machining path the machining is restarted. It becomes possible to provide a numerical control device with a small number of.

It is a figure which shows the structure of the numerical control apparatus which concerns on one Embodiment of this invention. It is a functional block diagram of the CPU provided in the numerical control device which concerns on one Embodiment of this invention. It is a flowchart which shows the operation of the numerical control apparatus which concerns on one Embodiment of this invention. This is an example of a machining path drawing screen by a numerical control device according to an embodiment of the present invention. It is a flowchart which shows the example of the operation procedure of the numerical control apparatus which concerns on one Embodiment of this invention.

[1. First Embodiment]
A numerical control device according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 4. FIG. 1 is a configuration diagram of a numerical control device 100. FIG. 2 is a functional block diagram of the control unit 111 included in the numerical control device 100. FIG. 3 is a flowchart showing the operation of the numerical control device 100. FIG. 4 is an example of a processing path drawing screen displayed on the display 170 of the numerical control device 100.

[1.1 Configuration of Numerical Control Device]
First, the configuration of the numerical control device 100 will be described with reference to FIGS. 1 and 2. Referring to FIG. 1, the numerical control device 100 includes a control unit 111, a ROM 112, a RAM 113, a CMOS memory 114, a plurality of interfaces (interface 115, interface 118, interface 119), a PLC 116, an I / O unit 117, and a data communication bus 120. , Multiple axis control circuits (axis control circuits 130 to 134), multiple servo amplifiers (servo amplifiers 140 to 144), spindle control circuit 160, spindle amplifier 161. Display / MDI unit 170, operation panel 171 and external device 172. , A laser control unit 180.

The control unit 111 controls the numerical control device 100 as a whole, and is realized by using, for example, a processor. The control unit 111 reads out the system program and the application program stored in the ROM 112 via the data communication bus 120, controls the entire numerical control device 100 according to the system program, and controls the entire numerical control device 100 according to the system program, and also according to the application program, the functional block diagram of FIG. Realize each function shown in. The details of the control unit 111 will be described later.

Temporary calculation data, display data, and various data input by the operator via the display 170 are stored in the RAM 113.

The CMOS memory 114 is backed up by a battery (not shown), and is configured as a non-volatile memory in which the storage state is maintained even when the power of the numerical control device 100 is turned off. The CMOS memory 114 stores a machining program read via the interface 115, a machining program input via the display 170, and the like.

Various system programs for carrying out processing in the editing mode required for creating and editing a machining program and processing for automatic operation are written in the ROM 112 in advance.

Various machining programs can be input via the interface 115 and the display 170 and stored in the CMOS memory 114.

The interface 115 enables connection between the numerical control device 100 and an external device 172 such as a data server. Machining programs, various parameters, etc. are read from the external device 172 side. Further, the machining program edited in the numerical control device 100 can be stored in the external storage means via the external device 172.

The PLC (programmable logic controller) 116 is a sequence program built in the numerical control device 100, and outputs a signal to an auxiliary device of the machine tool via the I / O unit 117 for control. In addition, it receives signals from various switches on the operation panel installed in the main body of the machine tool, performs necessary signal processing, and then passes them to the CPU 111.

The display 170 is a manual data input device including a display, a keyboard, and the like, and the interface 118 receives commands and data from the keyboard of the display 170 and passes them to the CPU 111.
The interface 119 is connected to an operation panel 171 equipped with a manual pulse generator or the like.
The axis control circuits 130 to 134 of each axis receive the movement command amount of each axis from the CPU 111, and output the command of each axis to the servo amplifiers 140 to 144.

In response to this command, the servo amplifiers 140 to 144 drive the servomotors 150 to 154 of each axis. Servo motors 150 to 154 of each axis have a built-in position / velocity detector, and the position / velocity feedback signal from this position / velocity detector is fed back to the axis control circuits 130 to 134 to perform feedback control of position / velocity. .. Note that in FIG. 1, the feedback of position and speed is omitted.

The spindle control circuit 160 receives a spindle rotation command to the spindle to which the tool is attached, and outputs a spindle speed signal to the spindle amplifier 161. In response to this spindle speed signal, the spindle amplifier 161 rotates the spindle motor 162 at the commanded rotation speed to drive the machining head attached to the spindle.

The laser control unit 180 receives a laser output command for laser processing based on the processing program from the control unit 111. Here, the laser output command includes, for example, instructions such as a peak power, a frequency, and a duty ratio for irradiating a laser beam having a predetermined output. The laser control unit 180 outputs a control signal based on this laser output command to the laser processing unit 190.

The laser processing unit 190 is a portion including a laser oscillator that oscillates and emits laser light, and a processing head and a nozzle that collects the laser light emitted from the laser oscillator by an optical system and irradiates the work. The laser processing unit 190 irradiates the work with a laser beam having a predetermined output based on the control signal from the laser control unit 180.

It should be noted that those skilled in the art are well aware of a general method of moving a work or a tool by each axis connected to a motor, and a general laser processing method using a laser processing unit 190. Therefore, detailed description and illustration of these points will be omitted.

Further, the configuration example of the numerical control device 100 described above is only an example. For example, in the above-mentioned configuration example, five axis control circuits of axis control circuits 130 to 134 and five servomotors of servo motors 150 to 154 are shown. However, the present invention is not limited to this, and any number of axis control circuits and servomotors may be provided. The numerical control device 100 shown in FIG. 1 includes a laser control unit 180, but this is an example and is not limited thereto. Specifically, the numerical control device 100 may control a machine tool other than the laser processing machine.

FIG. 2 is a functional block diagram of the control unit 111. The control unit 111 reads out the application program stored in the ROM 112 via the data communication bus 120, and realizes each function shown in the functional block diagram of FIG. 2 according to the application program.

The machining program analysis unit 121 analyzes the machining program before machining. More specifically, the machining program analysis unit 121 may generate a syntax tree of the machining program by analyzing the syntax of the machining program, and extract conditional judgments and actions based on the generated syntax tree. good.

The unprocessed path drawing unit 122 draws an unprocessed machining path on the machining path drawing screen displayed on the display 170 based on the analysis result of the machining program by the machining program analysis unit 121.

The restart position candidate setting unit 123 stores the information of the block that is a candidate for the restart position for restarting the machining based on the analysis result of the machining program by the machining program analysis unit 121.

More specifically, the restart position candidate setting unit 123 stores information of a block including a specific command as a block that is a candidate for the restart position. Here, examples of the block including a specific command include a block including a subprogram call command, a block including a macro call command, a block including a macromodal call command, and a block including a G code command for enabling a predetermined function. , A block including an M code command, a block including a B code command, and a positioning block.
The "subprogram call command" is a command to call a child machining program from the parent machining program when a plurality of machining programs have a parent-child relationship.
Further, the "macro call command" is a command for calling a macro program, which is a group of commands registered in the memory.
Further, the "macro modal call command" is a command to call a macro program by instructing only a variable while continuing to use the macro program once called.
Further, the "G code command" is a command by the G code instructing the preparation function for performing the machining. Specifically, the "G code command" is, for example, synchronous control, mixing control, superimposition control, cylindrical interpolation, polar coordinate interpolation, polar coordinate command, tool diameter correction, normal direction control, tool tip point control, tool length correction. , Scaling, coordinate rotation, three-dimensional coordinate conversion, programmable mirror, work installation error correction, etc. are commands by G code.
Further, the "M code command" is a command by the M code instructing an auxiliary function for processing by the laser processing unit 190, which will be described later.
Further, the "B code command" is a command by the B code instructing the second auxiliary function for processing by the laser processing unit 190.
The "positioning block" is a block for moving the machining head of the laser machining section 190 to the machining start position.

Further, when the machining program is a laser machining program, the restart position candidate setting unit 121 enables a block including a subprogram call command, a block including a macro call command, a block including a macromodal call command, and a predetermined function. In addition to the block containing the G code command, the block containing the M code command, the block containing the B code command, and the positioning block, the block containing the piercing command, the block containing the gap control command, and the block containing the assist gas command are restarted. It may be a block that is a candidate for a position.
The "piercing command" is a command for instructing drilling with a laser.
Further, the "gap control command" is a command for instructing the size of the gap, that is, the preceding operation for causing the gap amount to reach the target value before starting the laser oscillation.
Further, the "assist gas command" is a command for blowing assist gas to the machining point of the work and its surroundings during laser machining.

In addition to the above block, the restart position candidate setting unit 123 sets the interrupted block in which machining is interrupted as a block that is a candidate for the restart position.

The processing drawing unit 124 draws the current position of each moment during processing on the processing path drawing screen. In particular, the machined drawing unit 124 is superimposed on the raw machined path drawn by the raw machined path drawing unit 122, and the current position of each moment during the machined is displayed as a dotted line, so that the machined machine has been machined. It is preferable to draw the route. When the unprocessed processing path is drawn by the dotted line, the processing drawing unit 124 may draw the processed processing path by a solid line, and when the unprocessed processing path is drawn by a solid line, the processing unit 124 may draw the processed processing path by a solid line. May draw the processed processing path with a dotted line.

When the processing is interrupted, the block head position drawing unit 125 displays the processing position corresponding to the head of the block that is a candidate for the restart position stored by the restart position candidate setting unit 123 on the processing path drawing screen. Draw on the path. Further, the block head position drawing unit 125 may display the entire path of the block to be restarted in a color different from that of other machining paths on the machining path drawing screen.

The restart block setting unit 126 sets the block corresponding to the processing position specified by the user from the processing positions drawn by the block head position drawing unit 125 as the restart block. That is, when the user specifies one of the machining positions displayed on the machining path drawing screen as the position where the machining is to be restarted, the restart block setting unit 124 is a block corresponding to the machining position specified by the user. Is set as a restart block.

The restart control unit 127 automatically executes a preparation program for setting modal and / or auxiliary functions necessary for restarting machining in response to a restart instruction from the user based on the restart block set by the restart block setting unit 126. do. In particular, when the machining program is a laser machining program and the restart block set by the restart block setting unit 126 is a block including a piercing command, a block including a gap control command, or a block including an assist gas command, restart control is performed. The unit 127 automatically executes the preparation program related to the piercing command, the gap control command, or the assist gas command in response to the restart operation.
Here, the "modal" is a G code that, once commanded, is valid until a G code different from the current one is specified.
Further, the "auxiliary function" is a function of controlling individual functions of the machine tool controlled by the numerical control device 100.

The description of the configuration of the numerical control device 100 is as described above. Next, the operation of the numerical control device 100 will be described with reference to FIGS. 3 and 4.

[1.2 Operation of numerical control device]
FIG. 3 is a flowchart showing the operation of the numerical control device 100. FIG. 4 is an example of a processing path drawing screen drawn on the display 170 included in the numerical control device 100.

In step S11, the control unit 111 starts the virtual operation of the machining program based on the instruction from the user. Specifically, the control unit 111 starts a virtual operation from the beginning to the end of the machining program without performing actual machining.

In step S12, the machining program analysis unit 121 analyzes the machining program. Specifically, the machining program analysis unit 121 generates a syntax tree of the machining program by, for example, analyzing the syntax of the machining program, and extracts condition judgments and operations corresponding to each machining from the generated syntax tree. ..

In step S13, the raw machining path drawing unit 122 draws the raw machining path on the machining path drawing screen displayed on the display 170 based on the analysis result of the machining program.

In step S14, the restart position candidate setting unit 123 stores information on the block that is a candidate for the restart position for restarting machining. Here, the blocks that are candidates for the restart position include a block that includes a subprogram call command, a block that includes a macro call command, a block that includes a macromodal call command, and a block that includes a G code command that enables a predetermined function. Examples include a block containing an M code command, a block containing a B code command, and a positioning block. When the machining program is a laser machining program, the blocks that are candidates for the restart position include a block including a piercing command, a block including a gap control command, a block including an assist gas command, and the machining condition setting function E. Examples include blocks containing code.

In addition, step S13 and step S14 may be executed in parallel as shown in FIG. 3, or may be executed linearly.

In step S15, the control unit 111 ends the virtual operation of the machining program.

In step S16, the control unit 111 controls the laser processing unit 190 via the laser control unit 180, and controls the servo amplifiers 140 to 144 via the axis control circuits 130 to 134, based on the analysis result of the processing program. By controlling the spindle amplifier 161 via the spindle control circuit 160, the actual machining by the machining program is started.

In step S17, the processing drawing unit 124 draws the current position of each moment during processing on the processing path drawing screen during processing. In particular, the machined drawing unit 124 is superimposed on the raw machined path drawn by the machined path drawing unit 123, and the current position of the machined machine is displayed as a dotted line from moment to moment during the machined processing. It is preferable to draw the route.

In step S18, the execution of the machining program is interrupted.
In step S19, the block head position drawing unit 125 corresponds to the machining position corresponding to the head of the block that is the candidate for the restart position stored by the restart position candidate setting unit 123, and the head of the interrupted block in which machining is interrupted. The machining position is drawn on the machining path displayed on the machining path drawing screen.

In step S20, the user specifies a position where he / she wants to restart machining from the machining positions corresponding to the candidates for the restart position drawn on the machining path. In response to this, the restart block setting unit 124 sets the block corresponding to the machining position specified by the user as the restart block.

In step S21, the user operates to restart the machining program from the restart block set by the restart block setting unit 126. Specifically, the user instructs the restart of the machining program from the display 170 and the operation panel 171 included in the numerical control device 100.

In step S22, the restart control unit 127 prepares to set the modal and / or auxiliary function necessary for restarting the machining in response to the restart instruction from the user based on the restart block set by the restart block setting unit 124. Run the program automatically. In particular, when the machining program is a laser machining program and the restart block set by the restart block setting unit 126 is a block including a piercing command, a block including a gap control command, or a block including an assist gas command, restart control is performed. Unit 127 automatically executes a preparation program related to a piercing command, a gap control command, or an assist gas command, respectively, in response to a restart instruction from the user.

In step S23, the control unit 111 restarts the actual machining by the machining program from the restart block set by the restart block setting unit 126.

FIG. 4 shows an example of a machining path drawing screen at the time of step S20 in the flowchart shown in FIG. Note that FIG. 4 shows an example of a processing path drawing screen when the laser processing machine controlled by the numerical control device 100 executes a large number of pieces processing, but the present invention is not limited to this.

Machining path The machining path is shown on the right side of the drawing screen. In the example shown in FIG. 4, the processed processing path is shown by a solid line and the unprocessed processing path is shown by a dotted line, but the present invention is not limited to this, and the processed processing path is shown by a dotted line and is not processed. The processing path may be indicated by a solid line. Further, FIG. 4 shows an example in which four plates are hollowed out in the original plan due to laser processing, but the processing is interrupted in the middle of hollowing out the third plate.

Candidates for machining positions to resume machining are indicated by black circles on the machining path. More specifically, in the example shown in FIG. 4, in the first to fourth plates, the head portion of the block including the piercing command for starting the cutting by the laser is shown at two locations on each plate. Further, in the third plate, the head portion of the interrupted block in which the machining is interrupted is indicated by a black circle as an interrupt point.

The user selects a machining position at which he / she wants to resume machining from a plurality of machining positions indicated by black circles. FIG. 4 shows an example in which the machining position set in the hollow portion of the fourth plate is selected.

The details of the restart block corresponding to the selected machining position are shown on the left side of the machining path drawing screen. "Program" indicates the name of the program being executed. The "sequence number" is a number indicating the location of the machining program. The "block number" is a number for identifying the position of the restart block in the machining program at the present time. The "all block number" is a number for identifying the position of the restart block in all the blocks in the whole machining program. For example, in the case of multi-cutting as shown in FIG. 4, when it is desired to restart the machining from the middle of the fourth hollowing, the laser hollowing has already been repeated three times, so that the fourth hollowing is in progress. The "all block numbers" are shown after the block numbers related to the first to third hollowing processes are added to the block numbers. The "repetition count" is a number indicating how many times the restart block is repeated in the machining program. The "multiplicity" is a numerical value indicating the generation number of the program whose name is indicated by the "program" in the parent-child relationship of all the machining programs as seen from the main machining program. The "multiplicity 1" indicates that the program is the first generation seen from the main machining program, that is, the program is directly called from the main machining program without going through another machining program. "Caller" indicates a program that calls the program whose name is indicated by "program".

The description relating to the operation of the numerical control device 100 is as described above. Next, with reference to FIG. 5, the operation procedure of the user when the user restarts the machining using the numerical control device 100 will be described.

[1.3 User operation]
FIG. 5 is a flowchart showing an example of a user's operation procedure.
When the machining by the machine tool is interrupted, for example, the machining path drawing screen shown in FIG. 4 is displayed on the display 170.
In step S31, the user selects a machining position to be restarted from the machining positions corresponding to the candidates for the restart position drawn on the machining path displayed on the machining path drawing screen.
In step S32, the user presses the softkey [restart setting]. As a result, a restart block corresponding to the machining position selected by the user is set.
In step S33, the user presses the softkey [Resume].
In response to this, the numerical control device 100 restarts the machining by the machine tool.

In the above description, an example in which the numerical control device 100 according to the first embodiment controls a laser machine tool as a machine tool has been described, but the present invention is not limited thereto. That is, instead of a laser processing machine, for example, lathes, drilling machines, boring machines, milling machines, grinding machines, gear cutting machines / gear finishing machines, machining centers, electric discharge machines, punch presses, conveyors and plastic injection molding machines. The present invention can be applied to a numerical control device that controls a machine.

[1.4 Effects of the first embodiment]
The numerical control device 100 according to the present embodiment draws a machining path corresponding to the head of a block that is a candidate for a machining restart position when machining is interrupted in a machine tool controlled by the numerical control device 100. A block that draws on the machining path displayed on the screen and includes the machining position specified by the user in the machining path drawing screen is set as a restart block.
As a result, the operator can visually grasp where in the actual machining path the block to be the restart position is restarted, and the procedure for restarting the machining can be reduced.

Further, the numerical control device 100 enables a break block, a block including a subprogram call command, a block including a macro call command, a block including a macro modal call command, and a predetermined function as blocks that are candidates for the restart position. Among the blocks including the G code command, the M code command, the block containing the B code command, and the positioning block, at least one or more types of blocks are candidates.
This makes it possible to analyze the machining program before the actual machining and store the information of the block that is a candidate for the restart position in advance.

Further, the numerical control device 100 draws the current position of each moment during processing by superimposing it on the unprocessed processing path.
As a result, the user can visually grasp to what extent the machining is completed out of all the initially set machining paths.

Further, the numerical control device 100 automatically executes a preparation program for setting modal and / or auxiliary functions necessary for restarting machining in response to a restart operation by the user.
This makes it possible to simplify the procedure for restarting machining.

When the machining program is a laser machining program, the numerical control device 100 includes a break block, a block including a subprogram call command, a block including a macro call command, and a macromodal call command as blocks that are candidates for the restart position. A block containing a G-code command that enables a predetermined function, a block containing an M-code command, a block containing a B-code command, and a positioning block, a block containing a piercing command, a block containing a gap control command, and an assist gas. The block containing the command is a candidate.
When the machining program is a laser machining program, the numerical control device 100 responds to the restart operation when the set restart block is a block including a piercing command, a block including a gap control command, or a block including an assist gas command. , Piercing command, gap control command, or assist gas command preparatory program is automatically executed.
This makes it possible to apply the control method according to the present invention specifically to the case where the control target of the numerical control device 100 is a laser processing machine.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments. Moreover, the effects described in the present embodiment are merely a list of the most preferable effects resulting from the present invention, and the effects according to the present invention are not limited to those described in the present embodiment.

100 Numerical control device 111 CPU
121 Resume position candidate setting unit 122 Processing drawing unit 123 Block head position drawing unit 124 Resume block setting unit 125 Resume control unit

Claims (4)

A display that displays the processing path drawing screen and
A machining program analysis unit that analyzes the machining program before machining,
An unprocessed path drawing unit that draws an unprocessed machining path on the machining path drawing screen based on the analysis result of the machining program.
Based on the analysis result of the machining program, a restart position candidate setting unit that stores information on a block that is a candidate for a restart position for restarting machining, and a restart position candidate setting unit.
A drawing unit during processing that displays the current position of each moment during processing during processing,
When machining is interrupted, the machining position corresponding to the head of the block that is a candidate for the restart position stored by the restart position candidate setting unit and the machining position corresponding to the head of the interrupted block in which machining is interrupted are set. A block head position drawing unit that draws on the machining path displayed on the machining path drawing screen and displays the entire path of the restarting block in a color different from that of other machining paths.
A restart block setting unit that sets a block corresponding to a processing position specified by the user from the processing positions drawn by the block head position drawing unit as a restart block, and a restart block setting unit.
A restart control unit that automatically executes a preparation program for setting modal and / or auxiliary functions necessary for restarting the machining in response to a restart instruction from the user based on the restart block set by the restart block setting unit. ,
Equipped with
The restart position candidate setting unit is at least a interruption block, a block including a subprogram call command, a block including a macro call command, a block including a macromodal call command, and a block including a G code command for enabling a predetermined function. A numerical control device having an M code command, a block including a B code command, and a positioning block as candidates for the restart position . The numerical value according to claim 1, wherein the processing drawing unit draws the current position of each moment during processing on the processing path by superimposing it on the raw processing path drawn by the raw processing path drawing unit. Control device. When the machining program is a laser machining program,
The restart position candidate setting unit includes a break block, a block including a subprogram call command, a block including a macro call command, a block including a macromodal call command, a block including a G code command for enabling a predetermined function, and an M code. In addition to the command, the block containing the B code command, and the positioning block, at least one of the blocks including the piercing command, the block containing the gap control command, and the block containing the assist gas command is placed in the restart position . The numerical control device according to claim 1 or 2 , which is a candidate for the above. When the machining program is a laser machining program,
The restart control unit is
When the restart block set by the restart block setting unit is a block including a piercing command, a block including a gap control command, or a block including an assist gas command, the piercing command, the above, in response to a restart instruction from the user. The numerical control device according to claim 3 , which automatically executes a gap control command or a preparation program related to the assist gas command.

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