JP7391255B1 - Information processing device and control program - Google Patents

Abstract

An information processing device capable of accurately calculating the execution time of an NC program and a control program for such an information processing device are provided. An information processing apparatus calculates an execution time of an NC program including a plurality of blocks. The information processing device 100 calculates the first execution time required for actual execution when a machine tool executes the first block among the plurality of blocks, and the first execution time required for the second block among the plurality of blocks. On the other hand, the calculation unit 120 calculates the execution time of the NC program based on the execution time corresponding to a plurality of blocks, including the second execution time required for actual execution when the second block is executed by the machine tool. . [Selection diagram] Figure 3

Description

The present invention relates to an information processing device and a control program.

Japanese Unexamined Patent Publication No. 2003-305624 (Patent Document 1) discloses that the estimated time required for production equipment to process a workpiece is calculated based on a program or parameter used to control production equipment constituting a production line. A cycle time calculation device is disclosed.

Japanese Patent Application Publication No. 2003-305624

As disclosed in the above Patent Document 1, in an NC (Numerical Control) machine tool in which various operations are automated by numerical control by a computer, the time required to execute the NC program (execution time) based on the NC program. An information processing device for calculating is known. In such an information processing device, it may be difficult to calculate an accurate execution time.

For example, when an NC program instructs the axis movement of a movable body such as a spindle or a turret, a machine tool may be equipped with a smoothing function to achieve smooth axis movement. The smoothing function uses undisclosed algorithms created independently by each NC manufacturer to set appropriate interpolation points on the path between command points specified in the NC program, so the execution time is calculated with this smoothing function taken into account. That is difficult.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and to provide an information processing device that can accurately calculate the execution time of an NC program, and a control program for such an information processing device. It is.

[1] An information processing device that calculates the execution time of an NC program including a plurality of blocks, wherein (i) when a machine tool executes the first block among the plurality of blocks; and (ii) the second execution time required for actual execution when the machine tool executes the second block among the plurality of blocks. An information processing device comprising: a calculation unit that calculates an execution time of the NC program based on execution times corresponding to the plurality of blocks including the above.

According to the information processing device configured in this way, in calculating the execution time of the NC program, the first execution time required for the actual execution when the first block and the second block of the NC program are respectively executed by the machine tool is calculated. Since the second execution time is reflected, the execution time of the NC program can be calculated accurately.

[2] The plurality of blocks command axis movement and include a plurality of first command blocks including the first block and the second block, and the calculation unit calculates the command point and speed of the axis movement. Error data regarding the error between the predicted execution time corresponding to each of the first command blocks calculated based on the first parameters included and the actual execution time required for executing each of the first command blocks. The information processing device according to [1], which calculates the execution time of the NC program based on.

According to the information processing device configured in this way, the predicted execution time corresponding to each first command block calculated based on the first parameter including the command point and speed of axis movement, and each first command block are calculated based on the first parameter including the command point and speed of axis movement. The execution time of the NC program can be accurately calculated by using error data regarding the error between the execution time and the actual execution time required for execution.

[3] The information processing device according to [2], wherein the calculation unit calculates the execution time of the NC program based on the error data created for each speed range of the axis movement.

According to the information processing device configured in this way, since the speed of axis movement may affect the path of axis movement, it is possible to more accurately calculate the execution time of the NC program.

[4] The information processing device according to [2] or [3], wherein the first parameter further includes acceleration of the axis movement.

According to the information processing device configured in this way, the acceleration of the axis movement affects the execution time of the axis movement, so the predicted execution time of each first command block can be calculated more accurately. .

[5] A communication unit that receives information from the machine tool including the execution time required for actual execution when each of the first command blocks is executed by the machine tool, and updates the error data based on the information. The information processing device according to any one of [2] to [4], further comprising an error data updating unit that updates the error data.

According to the information processing device configured in this manner, the execution time of the NC program can be calculated more accurately by updating the error data based on information from the machine tool.

[6] The plurality of blocks command axis movement, and include a plurality of first command blocks including the first block and the second block, and the calculation unit calculates the number of commands for each type of axis movement command. Based on the execution time data that is created and shows the correspondence between the second parameter including the command point and speed of the axis movement and the execution time required for actual execution when executing each of the first command blocks, the NC The information processing device according to [1], which calculates the execution time of a program.

According to the information processing device configured in this way, an execution method indicating the correspondence between the second parameter including the command point and speed of axis movement and the execution time required for actual execution when each first command block is executed. Using the time data, the execution time of the NC program can be accurately calculated.

[7] In the execution time data, each of the first command blocks is executed when each element of the second parameter satisfies the predetermined range defined for each element of the second parameter and the predetermined range. The information processing apparatus according to [6], wherein the information processing apparatus is associated with an average value of execution time required for actual execution.

According to the information processing device configured in this manner, the amount of execution time data to be prepared is reduced, so that the execution time of the NC program can be calculated more easily.

[8] The plurality of first command blocks include a specific block whose execution time is calculated by the calculation unit, and a plurality of preceding and following blocks that are executed before and after the specific block, and the second parameter is The information processing device according to [6] or [7], including the command point for the axis movement defined by a specific block and the command point for the axis movement defined by the plurality of front and rear blocks.

According to the information processing device configured in this way, the command points for axis movement specified by a plurality of front and rear blocks may affect the path of axis movement, so the execution time of the NC program is reduced. It can be calculated more accurately.

[9] The information processing device according to any one of [6] to [8], wherein the second parameter further includes at least one of a work offset value and a tool length.

According to the information processing device configured in this way, the work offset value and tool length may affect the path of axis movement, so it is difficult to calculate the execution time of the NC program more accurately. can.

[10] A communication unit that receives, from the machine tool, information including the execution time required for actual execution when each of the first command blocks is executed by the machine tool, and a communication unit that receives the execution time data based on the information. The information processing device according to any one of [6] to [9], further comprising an execution time data update unit that updates.

According to the information processing device configured in this way, by updating the execution time data based on information from the machine tool, the execution time of the NC program can be calculated more accurately.

[11] The plurality of blocks command axis movement, and include a plurality of first command blocks including the first block and the second block, and the calculation unit calculates the number of commands for each type of axis movement command. The NC program is executed based on a learned execution time estimation model that has been created and inputs the third parameter including the command point and speed of the axis movement, and outputs the execution time corresponding to each of the first command blocks. The information processing device according to [1], which calculates execution time.

According to the information processing device configured in this way, the trained execution time estimation model takes as input the third parameter including the command point and speed of axis movement, and outputs the execution time corresponding to each first command block. By using , it is possible to accurately calculate the execution time of the NC program.

[12] The plurality of first command blocks include a specific block whose execution time is calculated by the calculation unit, and a plurality of preceding and following blocks that are executed before and after the specific block, and the third parameter is The information processing device according to [11], including a command point for the axis movement defined by a specific block and a command point for the axis movement defined by the plurality of front and rear blocks.

According to the information processing device configured in this way, the command points for the axis movement specified by a plurality of front and back blocks may affect the path of the axis movement, so the execution time of the NC program is reduced. can be calculated more accurately.

[13] The information processing device according to [11] or [12], wherein the third parameter further includes at least one of a work offset value and a tool length.

According to the information processing device configured in this way, the work offset value and tool length may affect the path of axis movement, so it is difficult to calculate the execution time of the NC program more accurately. can.

[14] A communication unit that receives, from the machine tool, information including the execution time required for actual execution when each of the first command blocks is executed by the machine tool, and a communication unit that receives the third parameter based on the information. and a machine learning unit that relearns the correlation with the execution time corresponding to each of the first command blocks and updates the execution time estimation model, according to any one of [11] to [13]. information processing equipment.

According to the information processing device configured in this manner, the execution time of the NC program can be calculated more accurately by updating the execution time estimation model based on information from the machine tool.

[15] A control program for an information processing device that calculates the execution time of an NC program including a plurality of blocks, the control program causing the information processing device to (i) execute a first block among the plurality of blocks; (ii) the first execution time required for the actual execution when the first block is executed by the machine tool; and (ii) the first execution time required for the actual execution when the first block is executed by the machine tool; a step of receiving an input of a second execution time required for actual execution when executing the NC; and a step of receiving an input of a second execution time required for actual execution when executing the A control program that executes a step of calculating the program execution time.

According to the control program configured in this way, the execution time of the NC program can be calculated more accurately in the information processing apparatus.

As described above, according to the present invention, it is possible to provide an information processing device that can accurately calculate the execution time of an NC program, and a control program for such an information processing device.

FIG. 2 is a diagram schematically showing the relationship between an information processing device and a machine tool whose execution time of an NC program is calculated by the information processing device. FIG. 3 is a diagram showing an example of an NC program. 1 is a functional block diagram showing an information processing device in Embodiment 1 of the present invention. FIG. 2 is a functional block diagram showing the machine tool in FIG. 1. FIG. FIG. 3 is a diagram showing an image of error data. FIG. 2 is a diagram showing changes when a smoothing function is activated in the path of axis movement in the machine tool in FIG. 1. FIG. FIG. 2 is a functional block diagram showing an information processing device according to a second embodiment of the present invention. 2 is a diagram showing a path of axis movement in the machine tool in FIG. 1. FIG. It is a figure which shows the 2nd parameter and 3rd parameter used for calculation of execution time. FIG. 3 is a diagram showing an image of execution time data. FIG. 3 is a functional block diagram showing an information processing device in Embodiment 3 of the present invention. FIG. 2 is a schematic diagram showing a process for learning a trained time estimation model.

Embodiments of the invention will be described with reference to the drawings. In addition, in the drawings referred to below, the same numbers are attached to the same or corresponding members.

(Embodiment 1)
FIG. 1 is a diagram schematically showing the relationship between an information processing device and a machine tool for which the execution time of an NC program is calculated by the information processing device.

Referring to FIG. 1, machine tool 200 is an NC (Numerical Control) machine tool in which various operations for machining a workpiece are automated through numerical control by a computer.

The machine tool 200 is a lathe or a machining center that performs subtractive manufacturing (SM) on a workpiece. The machine tool 200 may be a multi-tasking machine having a turning function and a milling function, or may be a grinding machine. The machine tool 200 may be an AM/SM hybrid processing machine capable of removing a workpiece and performing additive manufacturing (AM) on the workpiece.

Machine tool 200 has an operation panel 240. The operation panel 240 includes a display section 241 for displaying various information regarding machining, and an operation section 242 for accepting various operations on the machine tool 200.

The information processing device 100 has a function of calculating the time required to execute an NC program (execution time) in the machine tool 200. More specifically, the information processing device 100 has a program creation function that creates an NC program to be used in the machine tool 200 from CAD data obtained from computer-aided design (CAD), and a program creation function that creates an NC program using the program creation function. It has an execution time calculation function that calculates the execution time of the NC program following the creation of the NC program.

The flow of calculating the execution time of the NC program in the machine tool 200 using the information processing device 100 will be briefly described.

In step S1, the machine tool 200 operates according to various NC programs, and measures the execution time required for actual execution of each block included in the NC program (hereinafter also referred to as "actual execution time"). do. The machine tool 200 outputs information including at least the actual execution time to the information processing device 100.

In step S2, the information processing device 100 uses the information input from the machine tool 200 to create or update the reference data Da. The reference data Da corresponds to error data Da1 (Embodiment 1), execution time data Da2 (Embodiment 2 described later), or execution time estimation model Da3 (Embodiment 3 described later). . Reference data Da is typically stored in storage unit 150 of information processing device 100.

In step S3, the information processing device 100 calculates the execution time of the NC program based on the reference data Da. More specifically, the information processing device 100 calculates the execution time of the NC program created by the program creation function based on the reference data Da. The calculated execution time is typically displayed on the display unit 130 of the information processing device 100.

Note that when the reference data Da is the error data Da1, in step S2, the information processing device 100 uses the predicted execution time calculated in the process of step S3 in addition to the information input from the machine tool 200. Create or update error data Da1. This point will be explained in detail later.

The above steps S1 and S2 are executed by the manufacturer of the information processing device 100 creating various NC programs as running programs and operating the machine tool 200 using the NC programs. The reference data Da created from the running program is stored as initial data in the storage unit 150 of the information processing device 100 before being sold. The reference data Da may be created corresponding to each individual machine tool 200, or may be created corresponding to the same type of machine tool 200 (for each model of the machine tool 200).

Furthermore, the above steps S1 and S2 are automatically executed when the user operates the machine tool 200 using various NC programs. As a result, the reference data Da stored in the storage unit 150 of the information processing device 100 is updated.

FIG. 2 is a diagram showing an example of an NC program. Referring to FIG. 2, an NC program whose execution time is calculated by the information processing apparatus 100 will be described.

The NC program includes multiple blocks BL. Each block BL corresponds to the description from the beginning to the end of the line of the NC program, and issues various commands to the machine tool 200.

The multiple blocks BL include multiple first instruction blocks BLa. The first command block BLa controls the axis movement of a movable body such as a tool spindle, a workpiece spindle, a tool rest, or a table in the machine tool 200, and instructs, for example, linear movement or circular interpolation. The first command block BLa is written using G codes such as G01 (linear cutting feed), G02 (curved cutting feed/clockwise), and G03 (curved cutting feed/counterclockwise). In FIG. 2, the first command block BLa includes parameters including command points for axis movement (coordinate values of the X-axis, Y-axis, and Z-axis) and speed (F value).

The multiple blocks BL further include multiple second command blocks BLb. The second command block BLb controls input/output such as rotation of the spindle in the machine tool 200, tool change by an automatic tool changer (ATC), and coolant ON/OFF. The second command block BLb is written using an M code or a T code.

Next, the configuration of information processing device 100 in this embodiment will be described. FIG. 3 is a functional block diagram showing an information processing apparatus in Embodiment 1 of the present invention. FIG. 4 is a functional block diagram showing the machine tool in FIG. 1. FIG. 5 is a diagram showing an image of error data.

Referring to FIGS. 1 to 5, each component of information processing device 100 includes arithmetic units such as a CPU (Central Processing Unit) and various computer processors, storage devices such as memory and storage, and wired wires that connect them. Alternatively, it is realized by hardware including a wireless communication line and software stored in a storage device and supplying processing instructions to an arithmetic unit. A computer program may be configured by a device driver, an operating system, various application programs located in an upper layer thereof, or a library that provides common functions to these programs.

As shown in FIG. 3, the information processing device 100 includes a program creation section 110. The program creation unit 110 creates an NC program P used in the machine tool 200.

The program creation section 110 includes a main processor section 111 and a post-processor section 112. The main processor unit 111 generates cutter location data (hereinafter referred to as "CL data") based on CAD data obtained from a CAD device. The post-processor unit 112 generates an NC program P based on the CL data generated by the main processor unit 111. The post-processor unit 112 outputs the generated NC program P to the transmitting unit 161 and program analyzing unit 121, which will be described later.

Information processing device 100 further includes communication section 160. The communication unit 160 is configured to be able to communicate between the information processing device 100 and the machine tool 200. The communication means in the communication unit 160 may be wireless or wired. As an example, EtherNET (registered trademark) is adopted as the communication standard for the machine tool 200 and the information processing device 100.

The communication section 160 includes a transmitting section 161 and a receiving section 162. The transmitting unit 161 transmits the NC program P generated by the post-processor unit 112 to the machine tool 200. The receiving unit 162 receives information Inf1 including the actual execution time measured by the monitoring unit 246 of the machine tool 200, which will be described later.

Note that the information processing device 100 in this embodiment may have a configuration that does not include the above program creation function. In this case, the information processing device 100 and the machine tool 200 may obtain an NC program created by a CAM device from the outside, or may obtain an NC program created manually or interactively from the outside. . The method of creating an NC program to which the present invention is applied is not particularly limited.

As shown in FIG. 4, the machine tool 200 further includes a numerical control device 210, a machine control device 220, and various mechanical elements 230.

Numerical control device 210 numerically controls the operation of machine tool 200. The numerical control device 210 includes an NC interpreter 211 that interprets an NC program, and a command output unit 212 that outputs control commands for the machine tool 200 to the machine control device 220. Machine control device 220 controls mechanical element 230 based on control commands from command output section 212. Examples of the mechanical element 230 include a rotation motor for rotating a tool or a workpiece, or a feed motor for moving a movable body such as a tool spindle, a workpiece spindle, a tool rest, or a table.

The operation panel 240 has a monitoring section 246. The monitoring unit 246 communicates with the command output unit 212 and monitors the progress of the NC program P. The monitoring unit 246 displays the progress of the NC program P on the display unit 241. While monitoring the progress of the NC program P, the monitoring unit 246 measures the time required for actual execution of each first command block BLa in the NC program P (actual execution time). The machine tool 200 transmits information Inf1 that associates the NC program P with the actual execution time of each first command block BLa described above to the information processing device 100.

Note that the means for measuring the actual execution time of each first command block BLa is not particularly limited. For example, a function may be used to measure the time between blocks by writing a specific command for each block of the NC program.

As shown in FIG. 3, the information processing device 100 further includes a calculation section 120, a display section 130, and a storage section 150. The calculation unit 120 calculates the execution time of the NC program P input from the post-processor unit 112. The display unit 130 is composed of a liquid crystal display, an organic EL display, or other display device. The display unit 130 displays the execution time of the NC program P calculated by the calculation unit 120.

The storage unit 150 stores error data Da1 and timetable T, which will be described later. The storage unit 150 further stores a control program for the information processing device 100. The control program is a program for causing the information processing device 100 to calculate the execution time of the NC program P.

The calculation unit 120 includes a program analysis unit 121 , an execution time prediction unit 122 , an execution time correction unit 123 , an execution time calculation unit 124 , and an execution time integration unit 126 .

The program analysis section 121 analyzes the NC program P input from the post-processor section 112. The program analysis unit 121 outputs the first command block BLa of the plurality of blocks BL included in the NC program P to the execution time prediction unit 122, and outputs the first command block BLa of the plurality of blocks BL included in the NC program P to the execution time prediction unit 122 The block BLb is output to the execution time calculation unit 124.

The execution time prediction unit 122 calculates the execution time (hereinafter also referred to as "predicted execution time") of each first command block BLa among the plurality of blocks BL included in the NC program P. The first command block BLa is a program for commanding axis movement, and is written using G code. The execution time prediction unit 122 calculates the predicted execution time of each first command block BLa based on a first parameter including a command point of axis movement and a speed (feed rate). The command points for axis movement are the command points before and after the movement (the command points specified in the first command block BLa that is one block before the first command block BLa for calculating the execution time, and the first command for calculating the execution time). (command point defined in block BLa). The first parameter may further include acceleration of the axis movement. The execution time prediction unit 122 outputs the calculated predicted execution time of each first instruction block BLa to the execution time correction unit 123 and the error data update unit 140, which will be described later.

The execution time correction unit 123 corrects the predicted execution time calculated by the execution time prediction unit 122 based on the error data Da1 stored in the storage unit 150.

As shown in FIG. 5, the error data Da1 includes the actual execution time of each first command block BLa measured by the monitoring unit 246 in the machine tool 200 and each first command block calculated by the execution time prediction unit 122. It relates to the error (((predicted execution time/actual execution time)-1)×100)% between the predicted execution time of BLa.

The error data Da1 is created for each axis movement speed range. As an example, error data Da1 is created for each speed range of more than 0 and less than 600 mm/min, more than 600 mm/min and less than 1200 mm/min, and more than 1200 mm/min and less than 2400 mm/min. .

In the error data Da1, the average value of the error between the actual execution time of the first command block BLa and the predicted execution time of the first command block BLa is calculated in each range of the speed of the axis movement. The average value of the errors calculated here is the predicted execution time calculated by the execution time prediction unit 122 when the machine tool 200 operates according to the various first command blocks BLa included in the NC program P, and the actual It shows the tendency of the difference between the actual execution time required for execution and the actual execution time.

The execution time correction unit 123 corrects the predicted execution time calculated by the execution time prediction unit 122 using the average value of the errors in the error data Da1. For example, when the average value of the errors indicated by the error data Da1 is -5%, the predicted execution time of the first command block BLa is corrected using the calculation formula: predicted execution time/0.95.

Note that the error data Da1 may be further created for each type of G code, such as G01 (linear cutting feed), G02 (curved cutting feed/clockwise), and G03 (curved cutting feed/counterclockwise). The speed of axis movement and the type of command may affect the tendency of the difference between the predicted execution time calculated by the execution time prediction unit 122 and the actual execution time required for actual execution. The predicted execution time of each first instruction block BLa can be corrected more accurately.

As shown in FIG. 3, the execution time correction unit 123 outputs the corrected execution time of each first command block BLa to the execution time integration unit 126.

The execution time calculation unit 124 calculates the execution time of each second command block BLb among the plurality of blocks BL included in the NC program P. The second command block BLb is an NC program written using M code or T code.

The execution time calculation unit 124 calculates the execution time of each second command block BLb based on the time table T stored in the storage unit 150. More specifically, the execution time calculation unit 124 reads the timetable T from the storage unit 150, and compares the timetable T with the commands defined in each second command block BLb. Get the output of the execution time.

The time table T indicates the execution time of the second command block BLb for each command specified by the second command block BLb (for example, the time required to execute the tool change commanded in M06). The second command block BLb, in which the NC program is written using M code and T code, is executed at a constant time. Therefore, the manufacturer of the information processing device 100 creates a second command block BLb that defines various commands as a running program, and executes the machine tool 200 using the running program, so that each second command block BLb Measure the execution time. A timetable T created based on such measurements is stored in the storage unit 150 in advance.

The execution time calculation unit 124 outputs the calculated execution time of each second command block BLb to the execution time integration unit 126.

The execution time integration unit 126 integrates the execution time of each first command block BLa input from the execution time correction unit 123 and the execution time of each second command block BLb input from the execution time calculation unit 124. The execution time of the NC program P is calculated as follows. The calculated execution time of the NC program P may be one process of workpiece machining, or may be the entire process of workpiece machining. The execution time accumulating unit 126 outputs the calculated execution time of the NC program to the display unit 130.

The information processing device 100 further includes an error data updating section 140. The error data updating unit 140 updates the actual execution time of each first command block BLa measured by the monitoring unit 246 in the machine tool 200 and the predicted execution time of each first command block BLa calculated by the execution time prediction unit 122. The average error value is updated by the new input.

In the scene of creating error data Da1 as initial data, by executing the machine tool 200 using a running program, data on the actual execution time of each second command block BLb included in the running program is collected. By inputting the running program to the execution time prediction unit 122, data on the predicted execution time of each first command block BLa included in the running program is collected. The error data update unit 140 creates error data Da1 based on these data.

Note that the function of the storage unit 150 that stores the error data Da1 and the time table T may be realized by an external device such as a server. Further, the function of the error data updating unit 140 may be executed by a CPU different from the information processing device 100.

FIG. 6 is a diagram showing changes in the path of axis movement in the machine tool in FIG. 1 when the smoothing function is activated.

Referring to FIG. 6, the command point is the coordinate value of the axis movement calculated by the program creation unit 110, and this coordinate value is written in the first command block BLa of the NC program. The plurality of first command blocks BLa command axis movement to move in order from command point 0 → command point 1 → command point 2 → command point 3. In this case, the machine tool 200 is equipped with a smoothing function that realizes smooth axis movement by providing appropriate interpolation points between command points. The smoothing function can be activated by writing a specific G code in the NC program. By activating the smoothing function, the surface quality of the workpiece can be improved, and free curves in particular can be made smoother.

On the other hand, since the smoothing function affects the axis movement path, it also affects the execution time of the NC program. However, since the smoothing function is based on a non-disclosed algorithm uniquely created by each NC manufacturer, it is difficult to calculate the execution time of the NC program by taking into account the interpolation points set by the smoothing function.

On the other hand, in the information processing device 100 according to the present embodiment, the predicted execution time of each first command block BLa calculated based on the first parameter including the command point of axis movement and the speed is The correction is made based on error data Da1 including the actual execution time of the first command block BLa. Since the execution time of the first command block BLa calculated in this way takes into account the actual path of axis movement, the execution time of the NC program P can be calculated accurately.

To summarize the configuration of the information processing apparatus 100 according to the first embodiment of the present invention described above, the information processing apparatus 100 according to the present embodiment calculates the execution time of the NC program P including a plurality of blocks BL. The information processing device 100 calculates the first execution time (corresponding to the first command block BLa) required for actual execution when the machine tool 200 executes the first block (corresponding to the first command block BLa) among the plurality of blocks BL. actual execution time) and the actual execution when the machine tool 200 executes the second block of the plurality of blocks BL (corresponding to the first command block BLa, which is different from the first block). The calculation unit 120 calculates the execution time of the NC program P based on the execution time corresponding to the plurality of blocks BL including the second execution time (actual execution time) required for the execution.

The plurality of blocks BL command axis movement and include a plurality of first command blocks BLa including a first block and a second block. The calculation unit 120 calculates the predicted execution time corresponding to each first command block BLa calculated based on the first parameter including the command point and speed of axis movement, and the actual execution time when each first command block BLa is executed. The execution time of the NC program P is calculated based on the error data Da1 regarding the error between the execution time required for execution (actual execution time).

Further, the control program of the information processing apparatus 100 in this embodiment calculates the execution time of the NC program P including a plurality of blocks BL. The control program is configured to provide the information processing device 100 with information on (i) actual execution when the machine tool 200 executes the first block (corresponding to the first command block BLa) among the plurality of blocks BL; (ii) the first execution time (actual execution time) required for a step of receiving an input of a second execution time (actual execution time) required for actual execution when two blocks are executed; and a step of receiving an input of a second execution time (actual execution time) required for actual execution when two blocks are executed; Based on this, the step of calculating the execution time of the NC program is executed.

According to the information processing device 100 and its control program in Embodiment 1 of the present invention configured as described above, in calculating the execution time of the NC program P, the machine tool 200 calculates each first command block of the NC program P. Since the execution time (actual execution time) required for actual execution when executing BLa is taken into consideration, the execution time of the NC program P can be calculated accurately.

(Embodiment 2)
FIG. 7 is a functional block diagram showing an information processing apparatus according to Embodiment 2 of the present invention. FIG. 8 is a diagram showing a path of axis movement in the machine tool in FIG. 1. FIG. 9 is a diagram showing the second and third parameters used to calculate the execution time. FIG. 10 is a diagram showing an image of execution time data.

The information processing apparatus according to the present embodiment basically has the same configuration as the information processing apparatus 100 according to the first embodiment. Hereinafter, descriptions of overlapping configurations will not be repeated.

Referring to FIGS. 7 to 10, in this embodiment, machine tool 200 uses NC program P and various setting values (work offset value and tool length) during execution of NC program P, and measurement by monitoring unit 246. The information Inf2 associated with the actual execution time is output to the information processing device 100.

The calculation unit 120 includes a program analysis unit 121 , an execution time calculation unit 127 , an execution time calculation unit 124 , and an execution time integration unit 126 .

The program analysis unit 121 outputs the first command block BLa of the plurality of blocks BL included in the NC program P to the execution time calculation unit 127, and outputs the first command block BLa of the plurality of blocks BL included in the NC program P The block BLb is output to the execution time calculation unit 124.

The execution time calculation unit 127 calculates the execution time of each first command block BLa based on the execution time data Da2 stored in the storage unit 150. More specifically, the execution time calculation unit 127 reads the execution time data Da2 from the storage unit 150, and inputs the second parameter described below corresponding to each first command block BLa into the execution time data Da2, thereby An output of the execution time of each first command block BLa is obtained.

The execution time calculation unit 127 outputs the calculated execution time of each first command block BLa to the execution time integration unit 126. The execution time calculation unit 124 calculates the execution time of each second command block BLb based on the time table T stored in the storage unit 150. The execution time calculation unit 124 outputs the calculated execution time of each second command block BLb to the execution time integration unit 126.

The execution time integration unit 126 integrates the execution time of each first command block BLa input from the execution time calculation unit 127 and the execution time of each second command block BLb input from the execution time calculation unit 124. The execution time of the NC program P is calculated as follows.

As shown in FIG. 8, the first command block BLa, which is NC block d0, NC block d1, NC block d2, NC block d3, NC block d4, NC block d5..., is changed from command point 0 to Axis movement is commanded to move in the order of command point 1 → command point 2 → command point 3 → command point 4 → command point 5, and so on.

Here, assuming that the execution time of the NC block d3 is calculated, the NC block d3 corresponds to a specific block for which the execution time is calculated, and the NC block d0, NC block d1, NC block d2, NC block d4 and NC block d5 correspond to a plurality of blocks before and after the specific block.

The execution time data Da2 is created based on information Inf2 from the machine tool 200. The execution time data Da2 is created for each type of axis movement command. The type of axis movement command corresponds to the type of G code (G01, G02, or G03) written in each first command block BLa. In the execution time data Da2, the second parameter is associated with the actual execution time (T) of each first command block BLa for each type of axis movement command (G code).

The second parameter includes an axis movement command point (x, y, z, i, j, k) and an axis movement speed (F). Here, (x, y, z) represents the coordinate values of the X, Y, and Z axes at the command point, and (i, j, k) represents the tool posture (direction vector of the tool's rotation axis). It represents. When calculating the execution time of NC block d3 in FIGS. 8 and 9, that is, the time required to move the axis from command point 2 to command point 3, the command point of the axis movement corresponding to the second parameter is It is defined in block d2 and NC block d3, and the speed of axis movement is defined in NC block d3.

If the type of axis movement command is G02 or G03, which commands circular interpolation, the axis movement command point is the coordinate value of the above (x, y, z) and the coordinate value of the center of the arc. Represented by a combination.

In this embodiment, the second parameter includes a command point defined in a specific block and a command point defined in a plurality of preceding and following blocks. It is preferable that the number of axis movement paths determined by adding command points is the same before and after the axis movement path for which the execution time is calculated. More specifically, when calculating the execution time of NC block d3 in FIGS. 8 and 9, command points specified in NC block d0, NC block d1, NC block d4, and NC block d5 are added. There is. By adding the command points specified in NC block d0 and NC block d1, the axis movement path from command point 0 to command point 1 and the axis movement path from command point 1 to command point 2 are changed. By determining the two paths and adding the command points specified in NC block d4 and NC block d5, the axis movement path from command point 3 to command point 4 and from command point 4 to command point 5 are determined. Two routes are determined, including the axis movement route.

According to such a configuration, in the smoothing function, the path of axis movement before and after the path for calculating the execution time affects the path for calculating the execution time. Therefore, by including the command point specified in a specific block and the command points specified in a plurality of preceding and following blocks in the second parameter, the execution time of each first command block BLa can be calculated more accurately. Can be done.

The second parameter may further include at least one of a work offset value (cx, cy, cz, ca, cc) and a tool length (h). Here, (ca, cc) represent the offset values of the rotational axes of the X-axis and the Z-axis, respectively.

In tool center point control, the user expects the speed of the tool relative to the workpiece when commanding the F value. However, assuming that a workpiece mounted on a rotary table is machined using a tool held on the spindle, the relative rotational speed of the workpiece and tool when machining the workpiece at a position close to the workpiece's rotation center is is greater than the relative rotational speed of the workpiece and tool when machining the workpiece at a position far from the center of rotation. For this reason, the numerical control device 210 in FIG. 4 may perform control to automatically limit the speed of the spindle. Therefore, by including the workpiece offset value in the second parameter, it is possible to grasp the positional relationship between the workpiece and the spindle, and the above control can be taken into consideration in calculating the execution time of the axis movement.

Furthermore, assuming a spindle that can pivot within a plane perpendicular to the rotational axis of the tool, if the length of the tool held by the spindle is long, the tip of the tool will pivot significantly. Therefore, the numerical control device 210 in FIG. 4 may perform control to automatically limit the rotation speed of the main shaft. Therefore, by including the tool length in the second parameter, the length of the tool held by the spindle can be grasped, and the above control can be taken into consideration in calculating the execution time of axis movement.

As shown in FIG. 10, in the execution time data Da2, a predetermined range defined for each element of the second parameter, and each first The average value of the actual execution time of the command block BLa is associated with the command block BLa.

In FIG. 10, it is assumed that the execution time of the NC block d3 in FIGS. 8 and 9 is calculated. In RangeSetA, the coordinate x0 of command point 0 defined in NC block d0 corresponds to x _0A that satisfies the relationship x _0A < x _0B , and the coordinate y0 of command point 0 defined in NC block d0 corresponds to y _0B. The coordinate z0 of the command point 0 defined in the NC block d0 corresponds to y _0C , which satisfies the relationship <y 0C < y _0D , and corresponds to z _0B , which satisfies the relationship z _0A < z _0B < z _0C , and _the NC The vector coordinate i0 of the tool posture at the command point 0 specified in the block d0 corresponds to i _0A satisfying the relationship i _0A < i _0B , and the vector coordinate j0 of the tool posture at the command point 0 specified in the NC block d0 corresponds to j _0C that satisfies the relationship j _0B < j _0C < j _0D , and the vector coordinate k0 of the tool posture at command point 0 defined in NC block d0 satisfies the relationship k _0A < k _0B < k _0C . Corresponding to k _0B that satisfies, the coordinate z5 of the command point 5 specified in NC block d5 corresponds to z _0A that satisfies the relationship z _0A < z _0B , and the speed F specified in NC block d3 is F _A The second parameters corresponding to F _A that satisfy the relationship <F _B are classified (although the description is omitted, the ranges are similarly defined for second parameters other than the above). In this case, the average value of the actual execution time of the first instruction block BLa that satisfies the range of the second parameter defined in RangeSetA is calculated as the actual execution time TA of the first instruction block BLa in RangeSetA.

Further, in RangeSetB, a combination of ranges different from that in RangeSetA is defined. In this way, a plurality of RangeSets in which mutually different ranges are defined are prepared, and the average value of the actual execution time of the first command block BLa is calculated in each RangeSet.

The execution time calculation unit 127 compares the second parameter corresponding to each first command block BLa with the RangeSet table in FIG. Obtain the actual execution time T of the command block BLa.

As shown in FIG. 7, the information processing apparatus in this embodiment includes an execution time data update section 146 in place of the error data update section 140 in the first embodiment. The execution time data updating unit 146 receives new input of the actual execution time of each first command block BLa measured by the monitoring unit 246 in the machine tool 200 and the second parameter corresponding to each first command block BLa. As a result, the average value of the actual execution time of the first command block BLa in the RangeSet is updated.

In addition, in the scene of creating the execution time data Da2 as initial data, by executing the machine tool 200 using a running program, the actual execution time of each first command block BLa included in the running program and each first command block are calculated. Data is collected in which one command block BLa is associated with a corresponding second parameter. The execution time data updating unit 146 creates execution time data Da2 based on these data.

To summarize the configuration of the information processing apparatus according to the second embodiment of the present invention described above, in this embodiment, the plurality of blocks BL of the NC program execute the plurality of first command blocks BLa for commanding axis movement. include. The calculation unit 120 is created for each type of axis movement command, and calculates a second parameter including the axis movement command point and speed, and the execution time (execution time) required for actual execution when each first command block BLa is executed. The execution time of the NC program P is calculated based on the execution time data Da2 indicating the correspondence with the real time).

According to the information processing apparatus according to the second embodiment of the present invention described above, the same effects as the information processing apparatus 100 according to the first embodiment can be achieved.

(Embodiment 3)
FIG. 11 is a functional block diagram showing an information processing apparatus according to Embodiment 3 of the present invention. FIG. 12 is a schematic diagram showing a process for learning a time estimation model.

The information processing apparatus according to the present embodiment basically has the same configuration as the information processing apparatus 100 according to the first embodiment. Hereinafter, descriptions of overlapping configurations will not be repeated.

Referring to FIGS. 11 and 12, in the present embodiment, machine tool 200 uses NC program P and various setting values (work offset value and tool length) during execution of NC program P, and measurement by monitoring unit 246. The information Inf3 associated with the actual execution time is output to the information processing device 100.

The calculation unit 120 includes a program analysis unit 121 , an execution time calculation unit 128 , an execution time calculation unit 124 , and an execution time integration unit 126 .

The program analysis unit 121 outputs the first command block BLa of the plurality of blocks BL included in the NC program P to the execution time calculation unit 128, and outputs the first command block BLa of the plurality of blocks BL included in the NC program P to the execution time calculation unit 128 The block BLb is output to the execution time calculation unit 124.

The execution time calculation unit 128 calculates the execution time of each first command block BLa based on the learned execution time estimation model Da3. The execution time calculation unit 128 outputs the calculated execution time of each first command block BLa to the execution time integration unit 126. The execution time calculation unit 124 calculates the execution time of each second command block BLb based on the time table T stored in the storage unit 150. The execution time calculation unit 124 outputs the calculated execution time of each second command block BLb to the execution time integration unit 126.

The execution time integration unit 126 integrates the execution time of each first command block BLa input from the execution time calculation unit 127 and the execution time of each second command block BLb input from the execution time calculation unit 124. The execution time of the NC program P is calculated as follows.

As shown in FIGS. 9 and 12, the execution time estimation model Da3 is an artificial intelligence model that inputs the third parameter corresponding to each first command block BLa and outputs the execution time of each first command block BLa. It is. The execution time calculation unit 128 reads the execution time estimation model Da3 from the storage unit 150 and inputs the third parameter to the execution time estimation model Da3, thereby obtaining an output of the execution time of each first instruction block BLa.

The execution time estimation model Da3 includes a neural network. The execution time estimation model Da3 includes, for example, a deep neural network such as a convolutional neural network (CNN).

The execution time estimation model Da3 is created for each type of axis movement command (G code). The third parameter corresponds to the second parameter in the second embodiment. More specifically, the third parameter includes the command point and speed of axis movement as primary data. Furthermore, feature quantities such as workpiece offset value or tool length, or acceleration of axis movement may be added as secondary data to the third parameter. In this case, execution time prediction using execution time estimation model Da3 Accuracy can be increased.

The information processing device in this embodiment includes a machine learning unit 147 in place of the error data updating unit 140 in the first embodiment. The machine learning unit 147 performs machine learning on the correlation between the third parameter and the execution time of the first command block BLa based on the information Inf3 from the machine tool 200.

Below, a process for causing the machine learning unit 147 to learn the execution time estimation model Da3 will be described.

First, an NC program for operating the machine tool 200 is created as a running program. The running program includes a plurality of first command blocks BLa in which each element of the third parameter is variously changed. The created running program is input into the machine tool 200.

Next, the machine tool 200 is operated according to the running program, and the actual execution time of each first command block BLa is measured. A learning data set is created in which the third parameter corresponding to each first command block BLa is associated with the measured actual execution time of each first command block BLa. The machine learning unit 147 acquires a learning data set from the machine tool 200.

The machine learning unit 147 reads the execution time estimation model Da3 from the storage unit 150. Execution time estimation model Da3 includes the neural network shown in FIG. 12. A neural network includes an input layer, a hidden layer, and an output layer. Each of the input layer, hidden layer, and output layer has one or more neurons. The number of neurons in each layer can be set as appropriate. Neurons in adjacent layers are connected to each other, and a weight (connection weight) is set for each connection. The number of neuron connections can be set as appropriate. A threshold value is set for each neuron, and the output value of each neuron is determined depending on whether the sum of the products of the input value and the weight for each neuron exceeds the threshold value.

The machine learning unit 147 inputs the third parameter corresponding to each first command block BLa acquired from the machine tool 200 to the input layer, and outputs the execution time of each first command block BLa from the output layer. For example, the machine learning unit 147 uses the third parameter as an input to the input layer to perform forward calculation processing of the neural network. Thereby, the machine learning unit 147 obtains the estimated execution time of each first command block BLa as the output value output from the output layer of the neural network.

The machine learning unit 147 calculates an error in the estimated value of the execution time of each first instruction block BLa with respect to the actual execution time (true value) of each first instruction block BLa acquired from the machine tool 200. Through this error calculation, the machine learning unit 147 calculates the weights of the connections between each neuron, the threshold value of each neuron, etc. so that if the same third parameter is input, an output value closer to the true value is obtained. Parameters of the execution time estimation model Da3 are set.

The machine learning unit 147 performs the machine learning described above until the estimated value of the execution time of the output first instruction block BLa finally matches the actual execution time of each first instruction block BLa obtained from the machine tool 200. Repeat steps. As a result, a learned execution time estimation model Da3 is created.

In addition, although the steps at the time of creating the trained execution time estimation model Da3 have been described above, the same steps are executed when the execution time estimation model Da3 is updated. As the user uses the machine tool 200, the machine learning unit 147 acquires new information Inf3 from the machine tool 200. The machine learning unit 147 relearns the correlation between the third parameter and the execution time corresponding to each first instruction block based on the information Inf3, and updates the execution time estimation model Da3.

To summarize the configuration of the information processing apparatus according to Embodiment 3 of the present invention described above, in this embodiment, the plurality of blocks BL include the plurality of first command blocks BLa that command axis movement. The calculation unit 120 is a learned machine that is created for each type of axis movement command, receives a third parameter including the axis movement command point and speed, and outputs the execution time corresponding to each first command block BLa. The execution time of the NC program P is calculated based on the execution time estimation model Da3.

According to the information processing apparatus according to the third embodiment of the present invention described above, the same effects as the information processing apparatus 100 according to the first embodiment can be achieved.

The embodiments disclosed this time should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is indicated by the claims rather than the above description, and it is intended that all changes within the meaning and range equivalent to the claims are included.

100 information processing device, 110 program creation section, 111 main processor section, 112 post-processor section, 120 calculation section, 121 program analysis section, 122 execution time prediction section, 123 execution time correction section, 124, 127, 128 execution time calculation section , 126 execution time integration unit, 130, 241 display unit, 140 error data update unit, 146 execution time data update unit, 147 machine learning unit, 150 storage unit, 160 communication unit, 161 transmission unit, 162 reception unit, 200 machine tool , 210 numerical control device, 211 interpreter, 212 command output unit, 220 mechanical control device, 230 mechanical element, 240 operation panel, 242 operation unit, 246 monitoring unit, BL block, BLa first command block, BLb second command block, Da reference data, Da1 error data, Da2 execution time data, Da3 execution time estimation model, Inf1, Inf2, Inf3 information, P program, T time table.

Claims (9)

An information processing device that calculates an execution time of an NC program including a plurality of blocks,
(i) the first execution time required for actual execution when the first block among the plurality of blocks is executed by a machine tool; and (ii) the first execution time required for the actual execution of the first block among the plurality of blocks; The execution time of the NC program is determined based on the execution time corresponding to the plurality of blocks, including the second execution time required for actual execution when the second block is executed by the machine tool for two blocks. Equipped with a calculation unit that calculates
The plurality of blocks include a plurality of first command blocks that command axis movement and include the first block and the second block,
The calculation unit calculates a predicted execution time corresponding to each of the first command blocks calculated based on a first parameter including a command point and speed of the axis movement, and an actual time when each of the first command blocks is executed. An information processing device that calculates an execution time of the NC program based on error data regarding an error between the execution time and the execution time required for execution of the NC program . An information processing device that calculates an execution time of an NC program including a plurality of blocks,
(i) the first execution time required for actual execution when the first block among the plurality of blocks is executed by a machine tool; and (ii) the first execution time required for the actual execution of the first block among the plurality of blocks; The execution time of the NC program is determined based on the execution time corresponding to the plurality of blocks, including the second execution time required for actual execution when the second block is executed by the machine tool for two blocks. Equipped with a calculation unit that calculates
The plurality of blocks include a plurality of first command blocks that command axis movement and include the first block and the second block,
The calculation unit is created for each type of axis movement command, and calculates a second parameter including a command point and speed of the axis movement, and an execution time required for actual execution when each of the first command blocks is executed. An information processing device that calculates an execution time of the NC program based on execution time data indicating a correspondence with the NC program. An information processing device that calculates an execution time of an NC program including a plurality of blocks,
(i) the first execution time required for actual execution when the first block among the plurality of blocks is executed by a machine tool; and (ii) the first execution time required for the actual execution of the first block among the plurality of blocks; The execution time of the NC program is determined based on the execution time corresponding to the plurality of blocks, including the second execution time required for actual execution when the second block is executed by the machine tool for two blocks. Equipped with a calculation unit that calculates
The plurality of blocks include a plurality of first command blocks that command axis movement and include the first block and the second block,
The calculation unit is created for each type of axis movement command, inputs a third parameter including the axis movement command point and speed, and outputs the execution time corresponding to each first command block. An information processing device that calculates an execution time of the NC program based on a completed execution time estimation model. The plurality of first command blocks include a specific block whose execution time is calculated by the calculation unit, and a plurality of preceding and following blocks that are executed before and after the specific block,
The information processing apparatus according to claim 3 , wherein the third parameter includes a command point for the axis movement defined by the specific block and a command point for the axis movement defined by the plurality of front and rear blocks. The information processing apparatus according to claim 3 or 4 , wherein the third parameter further includes at least one of a work offset value and a tool length. a communication unit that receives, from the machine tool, information including an execution time required for actual execution when each of the first command blocks is executed by the machine tool;
4. The method further comprises a machine learning unit that relearns the correlation between the third parameter and the execution time corresponding to each of the first command blocks based on the information, and updates the execution time estimation model. 5. The information processing device according to 3 or 4 . A control program for an information processing device that calculates an execution time of an NC program including a plurality of blocks,
The control program causes the information processing device to
(i) the first execution time required for actual execution when the first block among the plurality of blocks is executed by a machine tool; and (ii) the first execution time required for the actual execution of the first block among the plurality of blocks; a step of receiving an input of a second execution time required for actual execution when the second block is executed by the machine tool for two blocks;
calculating an execution time of the NC program based on execution times corresponding to the plurality of blocks including the first execution time and the second execution time ;
The plurality of blocks include a plurality of first command blocks that command axis movement and include the first block and the second block,
The step of calculating the execution time of the NC program includes a predicted execution time corresponding to each of the first command blocks calculated based on a first parameter including a command point and speed of the axis movement, and a predicted execution time of each of the first commands. A control program comprising the step of calculating an execution time of the NC program based on error data regarding an error between execution time required for actual execution when executing a block . A control program for an information processing device that calculates an execution time of an NC program including a plurality of blocks,
The control program causes the information processing device to
(i) the first execution time required for actual execution when the first block among the plurality of blocks is executed by a machine tool; and (ii) the first execution time required for the actual execution of the first block among the plurality of blocks; a step of receiving an input of a second execution time required for actual execution when the second block is executed by the machine tool for two blocks;
calculating an execution time of the NC program based on execution times corresponding to the plurality of blocks including the first execution time and the second execution time;
The plurality of blocks include a plurality of first command blocks that command axis movement and include the first block and the second block,
The step of calculating the execution time of the NC program is created for each type of axis movement command, and includes a second parameter including a command point and speed of the axis movement, and a time difference when each of the first command blocks is executed. A control program comprising a step of calculating an execution time of the NC program based on execution time data indicating a correspondence with an execution time required for actual execution. A control program for an information processing device that calculates an execution time of an NC program including a plurality of blocks,
The control program causes the information processing device to
(i) the first execution time required for actual execution when the first block among the plurality of blocks is executed by a machine tool; and (ii) the first execution time required for the actual execution of the first block among the plurality of blocks; a step of receiving an input of a second execution time required for actual execution when the second block is executed by the machine tool for two blocks;
calculating an execution time of the NC program based on execution times corresponding to the plurality of blocks including the first execution time and the second execution time;
The plurality of blocks include a plurality of first command blocks that command axis movement and include the first block and the second block,
The step of calculating the execution time of the NC program is created for each type of axis movement command, inputs a third parameter including the axis movement command point and speed, and calculates the execution time corresponding to each of the first command blocks. A control program comprising the step of calculating an execution time of the NC program based on a learned execution time estimation model that outputs an execution time.

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