JP7067518B2 - Numerical control device and control method - Google Patents

Description

The present invention relates to a numerical control device and a control method.

Patent Document 1 discloses an operation status monitoring device used at a production site. When the tact time measured by the measurement unit reaches a plurality of preset comparison values, the operation status monitoring device outputs progress information by a plurality of external lamps, buzzers, and the like. Therefore, the worker at the production site can recognize the appropriate work pace based on the output progress information.

Japanese Unexamined Patent Publication No. 2000-153432

In the above-mentioned operation status monitoring device, it is unclear under what working conditions the set multiple comparison values are set. If the worker changes the work conditions during the work, the tact time deviates from a plurality of preset comparison values, so that the progress information to be output may not be accurate.

An object of the present invention is to provide a numerical control device and a control method capable of outputting highly reliable progress information when processing a work material.

The numerical control device according to claim 1 is a numerical control device that controls the operation of a machine tool and executes machining of a work material based on a machining program. The machining is based on the condition setting unit that sets the machining conditions of the work material by executing the machining program, the machining program that the reception unit has accepted the execution, and the machining conditions set by the condition setting section. The execution unit that executes the process, the measurement unit that measures the processing time required for the processing by the execution unit, and when the processing by the execution unit is completed, the identification information of the processing program, the processing conditions, and the measurement. When the first storage control unit that stores the reference processing information corresponding to the processing time measured by the unit in the storage unit and the reception unit accepts the execution of the processing program, the reception unit accepts the execution. A reference machining information determination unit that determines whether or not the reference machining information that is the same as the identification information of the machining program and that is the same as the machining conditions set by the condition setting unit is stored in the storage unit, and the reference machining unit. When the information determination unit determines that the reference processing information having the same processing conditions as the identification information is stored in the storage unit, the processing time extraction unit that extracts the processing time of the reference processing information , The processing time of the work material is based on the processing time extracted by the processing time extraction unit and the processing time being measured by the measuring unit while the execution unit is executing the processing of the work material. The remaining time calculation unit that calculates the remaining time until the machining is completed, the progress information output unit that outputs the progress information including the information of the remaining time calculated by the remaining time calculation unit, and the processing by the execution unit. When the change receiving unit that accepts the change of the processing conditions and the change receiving unit accepts the change of the processing conditions and the processing of the work material is completed during the processing of the material, the processing program of the processing program. A second storage unit stores the identification information, the processing conditions, the change contents of the processing conditions received by the change receiving unit, and the processing history information corresponding to the processing time measured by the measuring unit. It is characterized by having a memory control unit .

The numerical control device stores the identification information of the machining program, the machining conditions, and the reference machining information corresponding to the machining time in the storage unit. When the numerical control device receives the execution of the machining program, the numerical control device determines whether the storage unit stores the identification information of the accepted machining program and the same reference machining information as the set machining conditions. The numerical control device extracts the machining time of the reference machining information. The numerical control device calculates the remaining time until the machining of the work material is completed based on the extracted machining time and the machining time measured by the measuring unit during the execution of machining. The numerical control device outputs progress information including information on the remaining time. Therefore, the numerical control device can output machine progress information when processing the work material.

The numerical control device accepts the change of the machining condition, and when the machining of the work material is completed, the numerical control device stores the machining history information corresponding to the identification information, the machining condition, and the change content of the machining condition in the storage unit. do. Therefore, the numerical control device can refer to the identification information, the processing conditions, and the changed contents from the processing history information of the storage unit.

The numerical control device according to claim 2 includes an output stop unit that stops the output of the progress information when the change reception unit accepts the change of the processing conditions, and is in a state of non-contact with the work material. The dry run reception unit that accepts changes in the execution conditions of the dry run that operates at a position away from the machine tool spindle and tool from the machining path, and the interrupt that accepts the execution of the interrupt program that is interrupted and executed during the execution of the machining program. The program reception unit, the override reception unit that accepts changes in the override setting values that change the operation speed of the machine tool, and the block skip operation that omits or executes the operation of one or more lines of the machining program. The change reception unit includes a block skip reception unit that accepts the change reception unit. It may be determined that the machining conditions of the machining program have changed. When the numerical control device receives the execution of the operation by the dry run reception unit, the interrupt program reception unit, the override reception unit, or the block skip reception unit, it determines that the processing conditions have been changed. In this case, the numerical control device does not output the progress information of the machining of the work material. Therefore, the numerical control device can prevent the output of erroneous progress information.

The numerical control device according to claim 3 has an on / off detection unit that detects the on / off state of the machine lock that stops the operation of the machine tool, and the progress information output when the on / off detection unit detects the on state. It is preferable to include an output stop unit for stopping the output of the progress information by the unit. When the numerical control device detects the on state of the machine lock, it does not output the progress information of the machining of the work material. Therefore, the numerical control device can prevent the output of erroneous progress information.

When the numerical control device of claim 4 determines that the specific unit that specifies the start position of the machining program and the start position specified by the specific unit are positions in the middle of the machining program, the progress information. It is preferable to include an output stop unit for stopping the output of the progress information by the output unit. The numerical control device specifies the machining program start position. For example, the numerical control device may interrupt the machining and restart the machining from the middle of the machining program. In this case, the numerical control device does not output the progress information. Therefore, the numerical control device can prevent the output of erroneous progress information.

In the numerical control device of claim 5 , when the first storage control unit completes the processing by the execution unit, the reference processing information determination unit determines that the reference processing information determination unit has previously stored the reference processing. The processing time of the information may be updated to the processing time measured by the measuring unit. When the machining is completed, the numerical control device updates the machining time of the reference machining information to the measured machining time. Therefore, the numerical control device can output progress information with reference to the latest updated machining time.

The control method according to claim 6 is a reception step for accepting execution of the machining program and a reception step for accepting execution of the machining program in a control method of a numerical control device that controls the operation of the machine tool and executes machining of the work material based on the machining program. Based on the condition setting step for setting the machining conditions of the work material by executing the machining program received in, the machining program accepted for execution in the reception step, and the machining conditions set in the condition setting step. An execution step for executing the machining, a measurement step for measuring the machining time required for the machining in the execution step, and when the machining is completed in the execution step, identification information of the machining program, the machining conditions, and the like. When the execution of the machining program is accepted in the first storage control step for storing the reference machining information corresponding to the machining time measured in the measurement step in the storage unit and the reception step, the reception step The reference machining information determination step for determining whether the reference machining information that is the same as the identification information of the received machining program and the same as the machining conditions set in the condition setting step is stored in the storage unit, and the above. When it is determined in the reference machining information determination step that the reference machining information having the same identification information and the machining conditions is stored in the storage unit, the machining time extraction for extracting the machining time of the reference machining information is performed. The work material is based on the processing time extracted in the processing time extraction step and the processing time being measured in the measurement step while the processing of the work material is being executed in the step and the execution step. The remaining time calculation step for calculating the remaining time until the processing is completed, the progress information output step for outputting the progress information including the remaining time information calculated in the remaining time calculation step, and the execution step. During the execution of the machining of the work material, the change acceptance step for accepting the change of the machining conditions and the change acceptance step accept the change of the machining conditions, and when the machining of the work material is completed, the machining is completed. The identification information of the program, the processing conditions, the change contents of the processing conditions received in the change acceptance step, and the processing history information corresponding to the processing time measured in the measurement step are stored in the storage unit. It is characterized by having a second memory control step .

In the above control method, the numerical control device can obtain the same effect as the numerical control device according to claim 1 by executing the above steps.

Front view of machine tool 1. The block diagram which shows the electric structure of the machine tool 1. The figure which shows the standard processing information. Flow chart of the main process. The flow chart which shows the continuation of FIG. The figure which shows the progress information 21 of the processing of the work material in the display part 15. The figure which shows the progress information 21 of a modification.

The machine tool 1 according to the present invention will be described with reference to FIGS. 1 and 2. The upper side, lower side, left side, right side, front side, and back side of FIG. 1 are defined as the upper side, lower side, left side, right side, front side, and back side of the machine tool 1, respectively. The machine tool 1 shown in FIG. 1 is a machine that rotates a tool to perform cutting on a work material.

As shown in FIGS. 1 and 2, the machine tool 1 is a vertical machine tool in which a spindle (not shown) extends in the Z-axis direction. The machine tool 1 includes a base portion 2, a machine body 3, and a cover 5. The base portion 2 is an iron base. The machine body 3 is provided on the upper part of the base portion 2. The machine body 3 performs cutting and the like of a work material (not shown) fixed to the upper surface of a workbench (not shown). The workbench is installed on the upper surface of the base portion 2. The cover 5 is fixed to the upper part of the base portion 2 and surrounds the periphery of the machine body 3. The operation of the machine tool 1 is controlled by the numerical control device 30 (see FIG. 2).

As shown in FIGS. 1 and 2, the machine tool 1 further includes an operation panel 13. The operation panel 13 is provided on the right side of the front surface 5B of the cover 5. The operation panel 13 includes a display unit 15 and an operation unit 24. The display unit 15 displays various setting screens for selecting a machining program, setting machining conditions for the machining program, and the like. When the processing of the work material is started, the display unit 15 displays, for example, an operation start screen (see FIG. 6A). The display unit 15 displays a screen such as progress information 21 (see FIG. 6B) while the machine tool 1 is processing the work material. Further, as shown in FIG. 6B, the display unit 15 displays the remaining time until the processing is completed and the ring-shaped figure having the length corresponding to the remaining time as the progress information 21. Further, the display unit 15 displays an operation completion display (see FIG. 6C) or the like when the processing of the work material is completed.

The operation unit 24 is used by the operator to input various operation settings and the like to the machine tool 1. By operating the operation unit 24 while checking the display unit 15, the operator sets various operations of the machine tool 1, processing conditions of the work material, and the like. The operator selects and executes the machining program by the operation unit 24. The operator can select and execute an interrupt program that executes another operation by an interrupt while the machining program is being executed by the operation unit 24.

The operation unit 24 includes a dial switch (not shown) that can be rotated. The operation unit 24 rotates the dial switch to change the operating speed of the machine tool 1, so-called override. The operation button 11 is a switch for machine lock. When the operation button 11 is pressed, the operation of the machine tool 1 does not operate the machine, but changes only the coordinate values and various command values based on the machining program.

The electrical configuration of the machine tool 1 will be described with reference to FIG. As shown in FIG. 2, the machine tool 1 includes a numerical control device 30, an operation panel 13, drive circuits 201 to 204, an X-axis motor 51, a Y-axis motor 52, a Z-axis motor 53, a spindle motor 54, and the like. The numerical control device 30 includes a CPU 31, a ROM 32, a RAM 33, a timer 23, a storage device 29, and an interface 34, 35. The CPU 31 controls the operation of the machine tool 1 in an integrated manner. The ROM 32 stores various programs such as the main program. The main program executes the main processing (see FIGS. 4 and 5) described later. The RAM 33 temporarily stores various data and the like. The timer 23 measures the machining time.

The storage device 29 is non-volatile and stores a plurality of machining programs for cutting various work materials. The machining program is an NC program executed to cut the work material. The storage device 29 further stores various information such as reference processing information. The reference machining information is stored in association with the machining program number of the machining program as identification information, the machining conditions of the work material, the machining time required for machining, and the like. The machining program number is identification information assigned to identify the machining program. Machining conditions can be set in detail by operating the operation panel 13 of the operator. The processing time is the time from the start to the completion of processing of the work material.

3A to 3C are examples of reference processing information stored in the storage device 29, respectively. The machining program number of the reference machining information in FIG. 3A is No. It is 100. The processing condition is override 100. There are no changes. The processing time is 60 min. The machining program number of the reference machining information in FIG. 3B is No. It is 100. The processing condition is override 80. There are no changes. The processing time is 75 min. The machining program number of the reference machining information in FIG. 3 (c) is No. It is 100. The processing conditions are override 120, block skip: 3-10th line. Dry run is ON. As for the changed contents, the interrupt program (No. 50) is executed on the 15th line. The processing time is 40 min.

The display unit 15 and the operation unit 24 are connected to the CPU 31 via the interface 34. The CPU 31 controls the drive circuits 201 to 204 via the interface 35. Each drive circuit 201 to 204 controls an X-axis motor 51, a Y-axis motor 52, a Z-axis motor 53, a spindle motor 54, and the like, respectively. The encoders 51a to 54a each detect position information and the like of the rotational positions of the X-axis motor 51, the Y-axis motor 52, the Z-axis motor 53, and the spindle motor 54, and the drive circuits 201 to 204 detect the position information and the like. The result is transmitted to the CPU 31 via the interface 35. The CPU 31 controls each drive circuit 201 to 204 to process the work material based on the position information and the like.

The main process will be described with reference to FIGS. 4 to 6. When the power is turned on to the machine tool 1, the CPU 31 reads out the main program stored in the ROM 32 and executes the main process (see FIGS. 4 and 5). The CPU 31 determines whether or not the machining program selected by the operator among the machining programs stored in the storage device 29 has been accepted (S1). The operator operates the operation unit 24, for example, inputs the program number 100 of the machining program, and presses the enter button (not shown). At that time, the CPU 31 determines that the machining program has been accepted. When it is determined that the processing program is not accepted (S1: NO), the CPU 31 returns the processing to S1. When the operator operates the operation unit 24 to select a machining program, the CPU 31 accepts the machining program (S1: YES). The operator operates the operation unit 24 to set the machining conditions of the selected machining program (S3). The details of the processing conditions will be described later.

The CPU 31 determines whether or not the storage device 29 has reference processing information (S5). At this time, the CPU 31 searches the storage device 29 for reference machining information having the same machining program number with respect to the machining program number received in the process of S1. The CPU 31 refers to the storage device 29 to search whether the machining program having the same machining program number stores the same machining conditions as the machining conditions set in the process of S3.

When it is determined that there is no reference machining information (S5: NO), the CPU 31 starts machining the work material based on the machining program received in the processing of S1 and the machining conditions set in the processing of S3 (S7). .. At this time, the CPU 31 starts measuring the machining time by the timer 23 (S9).

The CPU 31 determines whether or not the operator has changed the machining conditions (override, dry run, block skip, execution of interrupt program, machine lock, etc.) by operating the operation unit 24 during the machining of the work material. (S11). The change of the processing condition means that there is a change with respect to the processing condition set in the processing of S3.

Override is an operation of increasing or decreasing the speed with respect to the command speed. The operator operates the operation unit 24 to execute the override. Dry run means to operate at a position separated from the work material by a predetermined distance from the preset machining path of the spindle and the tool. Block skip means omitting or executing the operation of one line or multiple lines in the selected machining program.

An interrupt program is a program that interrupts a machining program that is being executed and executes another operation. When the interrupt program is executed, the CPU 31 interrupts the processing program being executed. When the execution of the interrupt program is completed, the CPU 31 restarts the machining program from the interrupted position. The machine lock is a function that updates only the coordinate values and various command values as if the program was executed, although the machine does not operate when the machine tool 1 executes the machining program when the operator presses the operation button 11. .. The operator operates the operation button 11 and the CPU 31 detects the on state and the off state of the machine lock.

When it is determined that the processing conditions have been changed (S11: NO), the CPU 31 determines whether or not the processing of the work material has been completed (S13). When it is determined that the processing of the work material is not completed (S13: NO), the CPU 31 returns the processing to S11. When the machining conditions are changed (S11: YES), the CPU 31 associates the changed machining conditions with the line during execution of the machining program and temporarily stores the changed machining conditions in the RAM 33 (S15). The CPU 31 advances the process to S13.

When it is determined that the machining of the work material is completed (S13: YES), the CPU 31 ends the measurement of the machining time of the work material by the timer 23 (S17). The CPU 31 displays an operation completion screen (for example, "machining is completed") on the display unit 15 in order to notify the operator that the machining of the work material is completed (S19).

The CPU 31 stores the machining program number, machining conditions, and machining time as reference machining information (S21). At this time, the reference machining information stored in the storage device 29 includes the machining program number of the machining program executed in the processes of S7 to S17, the machining conditions set in the process of S3, and the machining time acquired in the process of S17. When the processing conditions changed in the RAM 33 are stored in the processing of S15, the CPU 31 stores the changed processing conditions in the storage device 29 as the changed contents (see FIG. 3C). The CPU 31 returns the process to S1.

If it is determined that there is reference machining information in the processing of S5 (S5: YES), the CPU 31 may set to start from the middle of the machining program in the processing of S3, so that the machining program accepted in the processing of S1 The start position is specified (S23). The start position is specified, for example, by specifying the position of the first symbol "%" indicating the start of the program in the machining program. The CPU 31 determines whether or not the specified start position is the first line of the machining program (S25). When it is determined that the start position of the machining program is not from the first line, that is, the position is in the middle of the machining program (S25: NO), the CPU 31 advances the process to S7. The CPU 31 does not output the progress information 21 described later when there is no processing time for comparison for calculating the remaining time.

The CPU 31 starts processing the work material (S7) and performs the above-mentioned processes S7 to S21. At this time, the newly stored processing condition includes the start position of the program specified in the processing of S23 as the processing condition.

When it is determined in the processing of S25 that the start position of the program is from the first line of the machining program (S25: YES), the CPU 31 extracts the machining time from the reference machining information specified in the processing of S5 (S27). ). The CPU 31 starts machining the work material based on the machining program selected in the process of S1 and the machining conditions set in the process of S3 (S29). At this time, the CPU 31 starts measuring the machining time of the work material by the timer 23 (S31).

The CPU 31 displays the processing time (see FIG. 6A) extracted in the processing of S27 on the display unit 15 as the progress information 21 (S33). When the processing condition is FIG. 3A, the extracted processing time is 60 minutes. At that time, the display unit 15 displays "-: 60:00" as the progress information 21 (see FIG. 6A). The CPU 31 further advances the cutting of the work material.

Similar to S11, the CPU 31 determines whether or not the processing conditions have been changed (S35). When it is determined that the processing conditions have not been changed (S35: NO), the CPU 31 acquires the elapsed time of processing the work material by the timer 23 (S37). The CPU 31 acquires the remaining processing time based on the processing time extracted in the processing of S27 and the elapsed time acquired in the processing of S37 (S39). The remaining processing time is obtained by subtracting the elapsed time during measurement by the timer 23 from the processing time extracted in the processing of S27. Specifically, when the elapsed time is 27 minutes and 2 seconds, the remaining time is 32 minutes and 58 seconds, which is the difference between 60 minutes and 27 minutes and 2 seconds. The CPU 31 outputs progress information 21 including information on the remaining time, and updates the progress information 21 to the latest state (S41). In this case, the ring-shaped figure of the progress information 21 is updated to a state in which the lower left portion is extended by drawing an arc corresponding to the remaining time. At this time, the CPU 31 displays "-: 32: 58" on the display unit 15 as the latest progress information 21. Therefore, the CPU 31 can output highly reliable progress information 21 when processing the work material.

The CPU 31 determines whether or not the processing of the work material is completed (S43). The CPU 31 considers that the machining completion of the work material is completed when the symbol "%" is read for the second time or when the program end command such as M30 is read. When it is determined that the processing of the work material is not completed (S43: NO), the CPU 31 returns the processing to S35. When it is determined that the machining of the work material is completed (S43: YES), the CPU 31 ends the measurement of the machining time of the work material by the timer 23 (S45). The CPU 31 displays an operation completion screen (see FIG. 6C) on the display unit 15 (S47). At this time, the display unit 15 displays "00:00:00" and "END" as the operation completion screen (see FIG. 6C). In addition, the ring-shaped figure is updated to a circle indicating the completion of processing. The CPU 31 updates the machining time of the reference machining information stored in the storage device 29 in association with the machining conditions of the work material and the machining program number of the executed machining program (S49). Therefore, the CPU 31 can output the progress information 21 with reference to the latest updated machining time. The CPU 31 returns the process to S1.

On the other hand, when it is determined that the machining condition has been changed (S35: YES), the CPU 31 determines whether or not the machining condition change was a machine lock (S51). When the CPU 31 detects that the operation button 11 is pressed, it determines that the machine is locked. When it is determined that the machine is not locked (S51: NO), the CPU 31 stops the output of the progress information 21 displayed on the display unit 15 (S53). At this time, the machining conditions set in the process of S3 do not match the machining conditions being executed. Therefore, even if the processing time extracted by the processing of S27 and the elapsed time acquired by the processing of S37 are compared, the remaining time is not accurate. Therefore, the CPU 31 can prevent the erroneous progress information 21 from being output.

The CPU 31 advances the process to S15 (see FIG. 4). As described above, the CPU 31 performs the processes of S15 to S21 and returns the process to S1. Therefore, the CPU 31 newly provides reference machining information in which the change contents of the machining conditions changed in the processing of S35, the machining time measured by the timer 23 under the machining conditions, and the machining program number of the machining program are associated with each other. It can be stored in the storage device 29 (S21). Therefore, the CPU 31 can refer to the machining program number, the machining conditions, the machining time, and the changed contents from the reference machining information of the storage device 29.

On the other hand, when it is determined that the change of the machining condition is the machine lock (S51: YES), the CPU 31 stops only the operation of the machine (S55). The CPU 31 stops the output of the progress information 21 (S57). At this time, the machining conditions set in the process of S3 do not match the machining conditions being executed. Further, even if the processing time extracted in the processing of S27 and the elapsed time acquired in the processing of S37 are compared, the remaining time is not accurate. Therefore, the CPU 31 can prevent the erroneous progress information 21 from being output.

The CPU 31 determines whether or not there is an instruction to resume processing of the work material (S59). When the operator determines that the restart instruction is not accepted by operating the operation unit 24 (S59: NO), the process is returned to S59 and the work material is processed by the operation of the operator's operation unit 24. Wait for the restart instruction. The operator operates the operation unit 24 to give an instruction to restart the processing of the work material. When the CPU 31 determines that the processing restart instruction has been given (S59: YES), the CPU 31 advances the processing to S15 (see FIG. 4) and executes the processing of S15 to S21 as described above. At this time, the CPU 31 newly stores in the storage device 29 the reference machining information associated with the change contents of the machining conditions changed by the machine lock, the machining time by the timer 23, the machining conditions, and the machining program number of the program. Therefore, the CPU 31 can refer to the machining program number, the machining conditions, the machining time, and the changed contents from the reference machining information of the storage device 29.

As described above, the numerical control device 30 stores in the storage device 29 the reference machining information in which the machining program number of the machining program, the machining conditions, and the machining time are associated with each other. When the numerical control device 30 accepts the execution of the machining program, the numerical control device 30 determines whether the storage device 29 stores the machining program number of the accepted machining program and the same reference machining information as the set machining conditions. The numerical control device 30 extracts the machining time of the reference machining information. The numerical control device 30 calculates the remaining time until the machining of the work material is completed based on the extracted machining time and the machining time measured by the timer 23 during the execution of machining. The numerical control device 30 outputs progress information 21 including information on the remaining time. Therefore, the numerical control device 30 can output highly reliable progress information 21 when processing the work material.

When the CPU 31 accepts the change of the machining condition and the machining of the work material is completed, the numerical control device 30 receives the machining program number of the machining program, the machining condition, the change content of the machining condition accepted by the CPU 31, and the timer 23. The reference machining information corresponding to the machining time measured by is stored in the storage device 29. Therefore, the numerical control device 30 can refer to the machining program number, machining conditions, change contents, and machining time from the reference machining information of the storage device 29.

The numerical control device 30 includes an operation unit 24. The operation unit 24 receives a change in the execution conditions of the dry run that operates at a position where the spindle and the tool of the machine tool 1 are separated from the machining path in a state of being in non-contact with the work material. Further, the operation unit 24 accepts the execution of the interrupt program to be interrupted and executed during the execution of the machining program. The operation unit 24 accepts a change in the override set value that changes the operating speed of the machine tool 1. The operation unit 24 accepts a change in the block skip operation that omits or executes the operation of one line or a plurality of lines in the machining program. When the operation unit 24 accepts the execution of any of the operations, the CPU 31 determines that the machining conditions of the machining program have been changed. In this case, the numerical control device 30 does not output the progress information 21 of the machining of the work material. At this time, the machining conditions set in the process of S3 do not match the machining conditions being executed. Therefore, even if the processing time extracted by the processing of S27 and the elapsed time acquired by the processing of S37 are compared, the remaining time is not accurate. Therefore, the numerical control device 30 can prevent the erroneous progress information 21 from being output.

The CPU 31 of the numerical control device 30 detects an on state and an off state of the machine lock in which only the coordinate values and various command values change without the machine tool 1 actually operating the machine. When the CPU 31 detects the on state of the machine lock, the CPU 31 does not output the progress information 21 of the machining of the work material. At this time, the machining conditions set in the process of S3 do not match the machining conditions being executed. Therefore, even if the processing time extracted by the processing of S27 and the elapsed time acquired by the processing of S37 are compared, the remaining time is not accurate. Therefore, the numerical control device 30 can prevent the erroneous progress information 21 from being output.

The numerical control device 30 specifies the start position of the machining program. When the CPU 31 determines that the specified start position is in the middle of the machining program, the CPU 31 stops the progress information 21 by the display unit 15. At this time, the machining conditions set in the process of S3 do not match the machining conditions being executed. Therefore, even if the processing time extracted by the processing of S27 and the elapsed time acquired by the processing of S37 are compared, the remaining time is not accurate. Therefore, the numerical control device 30 can prevent the erroneous progress information 21 from being output.

When the machining is completed, the numerical control device 30 updates the machining time of the previously stored reference machining information determined to be stored by the CPU 31 to the machining time measured by the timer 23. Therefore, the numerical control device 30 can output the progress information 21 with reference to the latest updated machining time.

The present invention is not limited to the above embodiment. The machine tool 1 of the above embodiment is a vertical machine tool in which the spindle extends in the Z-axis direction, but the present invention can also be applied to a horizontal machine tool in which the spindle extends in the horizontal direction. In the above embodiment, the progress information 21 shown in FIG. 6 is displayed on the display unit 15 as the progress information 21, but the present invention is not limited to this. As shown in FIGS. 7 (a) to 7 (c), the progress rate and the elapsed time may be displayed as the progress information 21. As an example, the display unit 15 may display "65%" as a progress rate as the processing of the work material progresses (see FIG. 7 (b)). At that time, the display unit 15 displays "01:25:02" as the elapsed time below the progress information 21. Further, when the processing is completed, the display unit 15 may display "100%" as the progress rate of the progress information 21 (see FIG. 7 (c)). At this time, the display unit 15 may display "02:00:00" as the processing time.

The operation panel 13 may be a touch panel type. The operator can visually recognize and operate the display unit 15 via the touch panel. The touch panel detects the pressing operation of the operator and accepts various inputs. The detection of the machine lock was performed after the processing of S35, but the detection of the machine lock may be performed after the processing of S11. In the processing of S53 and S57, the output of the progress information 21 was stopped, but it does not have to be stopped.

The storage device 29 is an example of the storage unit of the present invention. The operation unit 24 is an example of the dry run reception unit of the present invention. The operation unit 24 is an example of the interrupt program reception unit of the present invention. The operation unit 24 is an example of the override reception unit of the present invention. The operation unit 24 is an example of the block skip reception unit of the present invention. The reference processing information is an example of the processing history information of the present invention.

The CPU 31 that executes the process of S1 in FIG. 4 is an example of the reception unit of the present invention. The CPU 31 that executes the process of S3 is an example of the condition setting unit of the present invention. The CPU 31 that executes the process of S7 is an example of the execution unit of the present invention. The CPU 31 that executes the process of S9 is an example of the measurement unit of the present invention. The CPU 31 that executes the process of S21 is an example of the first storage control unit of the present invention. The CPU 31 that executes the process of S5 is an example of the reference processing information determination unit of the present invention. The CPU 31 that executes the process of S21 is an example of the second storage control unit of the present invention. The CPU 31 that executes the process of S23 is an example of the specific unit of the present invention. The CPU 31 that executes the process of S27 in FIG. 5 is an example of the processing time extraction unit of the present invention. The CPU 31 that executes the process of S41 is an example of the progress information output unit of the present invention. The CPU 31 that executes the process of S35 is an example of the change receiving unit of the present invention. The CPU 31 that executes the processes of S53 and S57 is an example of the output stop unit of the present invention. The CPU 31 that executes the process of S51 is an example of the on / off detection unit of the present invention.

1: Machine tool 11: Operation button 13: Operation panel 15: Display unit 21: Progress information 24: Operation unit 29: Storage device 30: Numerical control device 31: CPU
32: ROM
33: RAM

Claims (6)

In a numerical control device that controls the operation of a machine tool and executes machining of a work material based on a machining program.
The reception unit that accepts the execution of the machining program and
A condition setting unit that sets the processing conditions of the work material by executing the processing program received by the reception unit, and a condition setting unit.
The processing program that the reception unit has accepted to execute, the execution unit that executes the processing based on the processing conditions set by the condition setting unit, and the execution unit.
A measuring unit that measures the processing time required for the processing by the execution unit,
When the machining by the execution unit is completed, the storage unit stores the reference machining information in which the identification information of the machining program, the machining conditions, and the machining time measured by the measurement section are associated with each other. One memory control unit and
When the reception unit accepts the execution of the machining program, the reference machining information that is the same as the identification information of the machining program received by the reception section and the same as the machining conditions set by the condition setting unit is used. A reference processing information judgment unit that determines whether or not it is stored in the storage unit,
When the reference processing information determination unit determines that the reference processing information having the same identification information and the processing conditions is stored in the storage unit, the processing time for extracting the processing time of the reference processing information. Extractor and
The processing of the work material is based on the processing time extracted by the processing time extraction unit and the processing time being measured by the measuring unit while the execution unit is executing the processing of the work material. Remaining time calculation unit that calculates the remaining time until the completion of
A progress information output unit that outputs progress information including the remaining time information calculated by the remaining time calculation unit, and a progress information output unit .
A change receiving unit that accepts changes in the processing conditions while the execution unit is performing the processing of the work material.
When the change receiving unit accepts the change of the processing condition and the processing of the work material is completed, the identification information of the processing program, the processing condition, and the processing condition accepted by the change receiving unit A second storage control unit that stores the processing history information corresponding to the changed contents and the processing time measured by the measurement unit in the storage unit.
A numerical control device characterized by being equipped with. When the change receiving unit receives a change in the processing conditions, it is provided with an output stopping unit that stops the output of the progress information.
A dry run reception unit that accepts changes in the execution conditions of a dry run that operates at a position where the spindle and tool of the machine tool are separated from the machining path in a non-contact state with the work material.
An interrupt program receiving unit that accepts the execution of an interrupt program that is interrupted and executed during the execution of the machining program.
An override reception unit that accepts changes in the override setting values that change the operating speed of the machine tool, and
It is provided with a block skip receiving unit that accepts a change in the block skip operation that omits or executes the operation of one line or a plurality of lines in the machining program.
When any one of the dry run reception unit, the interrupt program reception unit, the override reception unit, and the block skip reception unit accepts the execution of the operation, the change reception unit changes to the processing conditions of the processing program. The numerical control device according to claim 1, wherein it is determined that there was a problem. An on / off detector that detects the on / off state of the machine lock that stops the operation of the machine tool, and
The numerical control device according to claim 1 or 2 , wherein the on / off detection unit includes an output stop unit that stops the output of the progress information by the progress information output unit when the on state is detected. .. A specific part that specifies the start position of the machining program, and
When it is determined that the start position specified by the specific unit is a position in the middle of the machining program, it is characterized by including an output stop unit that stops the output of the progress information by the progress information output unit. The numerical control device according to claim 1 or 2 . When the processing by the execution unit is completed, the first storage control unit measures the processing time of the reference processing information previously stored, which is determined by the reference processing information determination unit to be stored. The numerical control device according to any one of claims 1 to 4 , wherein the unit updates the measured machining time. In the control method of the numerical control device that controls the operation of the machine tool and executes the machining of the work material based on the machining program.
The reception step that accepts the execution of the machining program and
A condition setting step for setting machining conditions for the work material by executing the machining program received in the reception step, and a condition setting step.
The machining program whose execution was accepted in the reception step, the execution step for executing the machining based on the machining conditions set in the condition setting step, and the execution step.
A measurement step for measuring the machining time required for the machining in the execution step, and a measurement step.
When the machining is completed in the execution step, the storage unit stores the reference machining information in which the identification information of the machining program, the machining conditions, and the machining time measured in the measurement step are associated with each other. One memory control step and
When the execution of the machining program is accepted in the reception step, the reference machining information that is the same as the identification information of the machining program received in the reception step and the same as the machining conditions set in the condition setting step is used. A reference processing information determination step for determining whether or not the data is stored in the storage unit, and
When it is determined in the reference machining information determination step that the reference machining information having the same identification information and the machining conditions is stored in the storage unit, the machining time for extracting the machining time of the reference machining information. Extraction step and
While the machining of the work material is being executed in the execution step, the machining of the work material is based on the machining time extracted in the machining time extraction step and the machining time being measured in the measurement step. Remaining time calculation step to calculate the remaining time until is completed,
A progress information output step that outputs progress information including the remaining time information calculated in the remaining time calculation step, and a progress information output step .
During the execution of the machining of the work material by the execution step, a change acceptance step for accepting changes in the machining conditions, and a change acceptance step.
When the change of the processing condition is accepted in the change acceptance step and the processing of the work material is completed, the identification information of the processing program, the processing condition, and the processing condition accepted in the change acceptance step A second storage control step that stores the processing history information corresponding to the changed contents and the processing time measured in the measurement step in the storage unit.
A control method characterized by being equipped with.

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