WO2017154182A1

WO2017154182A1 - Numerical control device

Info

Publication number: WO2017154182A1
Application number: PCT/JP2016/057662
Authority: WO
Inventors: 建宇頼
Original assignee: 三菱電機株式会社
Priority date: 2016-03-10
Filing date: 2016-03-10
Publication date: 2017-09-14

Abstract

This numerical control device, which is able to reduce the load by calculating a correction amount without reducing machining performance, is equipped with: an analysis unit (14) that analyzes a machining program used in numerical control, and generates analysis data; a correction amount calculation unit (16) that calculates a correction amount for the analysis data generated by the analysis unit (14), and generates a correction record; and a storage unit (13) that stores the correction record generated by the correction amount calculation unit (16).

Description

Numerical controller

The present invention relates to a numerical control device for controlling a machine tool.

Conventionally, a numerical control device (hereinafter referred to as NC (Numerical Control) device) generates a drive command by performing correction processing on a machining command indicating a command such as a machining position and a machining speed described in a machining program. By controlling the machine tool, high-speed and high-precision machining is realized. The processing speed and processing accuracy are improved by improving the correction processing technology. For example, Patent Document 1 discloses a technique for generating a machining program in which a noise block is deleted and a route is corrected when a noise block is included in a machining program generated by CAM (Computer Aided Manufacturing) or the like. Yes.

JP 2001-125616 A

However, in the NC device, since a large amount of data is handled in the calculation of the correction amount in the correction process and the calculation of the correction amount is complicated, the load due to the calculation of the correction amount is increased. As a result, the CPU (Central Processing Unit) load of the NC device increases, and in some cases, the machining performance of the NC device may be reduced. According to the above conventional technique, since the calculation result of the correction amount is not stored, it is necessary to recalculate the correction amount every machining of the NC, and there is a problem that the load on the CPU cannot be reduced.

The present invention has been made in view of the above, and an object of the present invention is to obtain a numerical control device capable of reducing a load by calculating a correction amount without deteriorating machining performance.

In order to solve the above-described problems and achieve the object, the numerical control device of the present invention includes an analysis unit that analyzes a machining program and generates analysis data. Further, the numerical control device includes a correction amount calculation unit that calculates the correction amount of the analysis data and generates a correction record. Further, the numerical control device includes a storage unit that stores the correction record generated by the correction amount calculation unit.

The numerical control device according to the present invention has an effect that the load due to the calculation of the correction amount can be reduced without deteriorating the machining performance.

Block diagram showing a configuration example of a numerical controller The figure which shows the example of calculation of the correction amount in the correction amount calculation part of a numerical controller Flow chart showing an example of numerical control processing operation of the numerical control device The figure which shows the example of the hardware constitutions of a numerical controller

Hereinafter, a numerical controller according to an embodiment of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment.
FIG. 1 is a block diagram illustrating a configuration example of a numerical control apparatus 10 according to an embodiment of the present invention. The numerical controller 10 includes a setting unit 11, a display unit 12, a storage unit 13, an analysis unit 14, a determination unit 15, a correction amount calculation unit 16, a correction unit 17, a drive command generation unit 18, and the like. A data input / output unit 19. In FIG. 1, the numerical control device 10 describes a configuration necessary for carrying out the present invention, and a description of a general configuration is omitted.

The setting unit 11 accepts an operation from the administrator of the numerical control device 10 via a button or a keyboard installed or connected to the numerical control device 10, and performs various settings for the numerical control processing. Specifically, the setting unit 11 sets correction processing information 111, pre-processing correction information 112, correction recording information 113, and correction recording usage information 114. The setting unit 11 stores the set correction processing information 111, pre-processing correction information 112, correction recording information 113, and correction recording usage information 114 in the setting information storage area 133 of the storage unit 13 as setting information D3. The numerical control device 10 may be configured so that the setting unit 11 is not provided, but the setting unit 11 is provided outside the numerical control device 10.

Each information set in the setting unit 11 will be described.

The correction processing information 111 is information indicating whether or not the correction amount calculation unit 16 calculates the correction amount, that is, whether or not the correction amount calculation unit 16 calculates the correction amount in the correction processing. The setting unit 11 sets the correction amount calculation valid when the correction amount calculation unit 16 calculates the correction amount, and sets the correction amount calculation invalid when the correction amount calculation unit 16 does not calculate the correction amount. Set. In the numerical controller 10, the determination unit 15 determines whether or not the correction amount calculation unit 16 calculates the correction amount based on the correction processing information 111. The administrator may set a specific correction method for the machining program D2 in the correction amount calculation unit 16 from the setting unit 11 as the correction processing information 111, but the correction amount calculation unit 16 in the present embodiment. Since the correction method in (2) may be the same as the conventional method, a detailed description of the correction method is omitted.

The pre-machining correction information 112 is data after analysis of the machining program D2 before the current numerical control processing executed by the numerical control device 10 controls the drive unit 20 to start actual machining, and the machining position This is information indicating whether or not correction before processing for calculating a correction amount for the analysis data D4 including processing information such as processing speed. The pre-processing correction is a numerical control process in the case where the numerical control device 10 does not output the drive command D7 to the outside of the device itself, in FIG. In the setting unit 11, when the correction amount for the analysis data D4 of the machining program D2 is calculated as the pre-machining correction information 112 before the actual machining is started in the numerical control device 10, the pre-machining correction is set to be effective. If the correction amount for the analysis data D4 of the machining program D2 is not calculated before the actual machining is started in the apparatus 10, the pre-machining correction is disabled. In the numerical controller 10, the determination unit 15 determines whether the current numerical control process is a pre-machining correction based on the pre-machining correction information 112.

The correction record information 113 is information indicating a recording method of the correction record D1 generated from the calculation result obtained by the correction amount calculation unit 16 calculating the correction amount for the analysis data D4 of the machining program D2. In the setting unit 11, as the correction record information 113, information as to whether or not the correction record D1 is stored, the transfer rate of the data of the correction record D1 when the correction amount calculation unit 16 stores the correction record D1 in the storage unit 13, The correction amount calculation unit 16 sets a data size that allows the storage unit 13 to store the correction record D1. Further, in the setting unit 11, a storage position indicating a position where the data of the correction record D 1 is stored in the storage unit 13 when the correction amount calculation unit 16 stores the correction record D 1 in the storage unit 13 as the correction record information 113. The correction amount calculation unit 16 sets the data format of the correction record D1 when the correction record D1 is generated, information to be given to the correction record D1, and the like. When the correction record D1 is stored, the correction amount calculation unit 16 causes the storage unit 13 to store the correction record D1 generated from the correction amount calculation result.

Specifically, the setting unit 11 sets the record valid when storing the correction record D1, and sets the record invalid when not storing the correction record D1, as information on whether or not to store the correction record D1. In the numerical control apparatus 10, the determination unit 15 confirms whether the recording is valid or invalid, and determines whether or not to store the corrected recording D1.

Further, the storage position indicating the position where the data of the correction record D1 is stored in the storage unit 13 is information indicating the position of the correction record storage area 131 of the storage unit 13 specifically. The data format of the correction record D1 is information that designates whether the correction record D1 is text format data or processing program format data. The information added to the correction record D1 is identification information of the machining program D2 used when the correction record D1 is generated by calculating the correction amount of the correction amount calculation unit 16. The identification information of the machining program D2 includes a unique number indicating the machining program D2, version information of the machining program D2, and the like.

The correction record use information 114 is information indicating whether or not to use the correction record D1 stored in the correction record storage area 131 of the storage unit 13 in the numerical control process. In the setting unit 11, the correction record use information 114 is set to enable correction record use when the correction record D1 is used in the numerical control process, and is set to disable correction record use when the correction record D1 is not used in the numerical control process. To do. In the numerical controller 10, the determination unit 15 determines whether to use the correction record D1 based on the correction record use information 114.

Returning to the description of the configuration of the numerical controller 10.

The display unit 12 displays information set by the administrator in the setting unit 11. The numerical control device 10 may display information set in an external display device without providing the display unit 12.

The storage unit 13 includes a correction recording storage area 131, a machining program storage area 132, and a setting information storage area 133, and stores data necessary for numerical control processing in the present embodiment. The correction record storage area 131 is an area where the correction record D1 generated from the calculation result of the correction amount by the correction amount calculation unit 16 in the current or past numerical control processing can be stored. The machining program storage area 132 includes a machining command indicating a machining position, a machining path, a machining shape, a machining speed, and the like when the numerical control device 10 drives the drive unit 20. This is an area where D2 can be stored. The setting information storage area 133 is an area in which the setting information D3 set by the setting unit 11 can be stored.

The analysis unit 14 reads out and analyzes the machining program D2 from the machining program storage area 132 of the storage unit 13 block by block, performs necessary calculations or processing, and analyzes data that is analysis result data obtained by analyzing the machining program D2. D4 is generated and output to the determination unit 15. The analysis unit 14 may store the analyzed data in a memory or the like, and the determination unit 15 may read the analysis data D4 from the memory. The memory may be the storage unit 13 or a storage unit different from the storage unit 13. The analysis unit 14 gives the identification information of the machining program D2 to the analysis data D4. Since the analysis processing in the analysis unit 14 is the same as the conventional one, detailed description is omitted.

When the analysis data D4 is input directly from the analysis unit 14 or indirectly through the memory, the determination unit 15 receives the correction record D1 and the machining program storage area stored in the correction record storage area 131 from the storage unit 13. The machining program D2 stored in 132 and the setting information D3 stored in the setting information storage area 133 are read out. The determination unit 15 performs various determinations in the numerical control processing based on the input correction record D1, machining program D2, setting information D3, and analysis data D4. Specifically, the correction record D1 is stored in the storage unit 13. Whether or not the correction record D1 is used in the numerical control process, whether or not the machining program D2 used in generating the correction record D1 and the current machining program D2 match, and the current numerical control It is determined whether the process is correction before processing, whether the correction amount is calculated by the correction amount calculation unit 16, and whether the correction record D1 is stored.

Specifically, when the determination unit 15 cannot read the correction record D1 from the correction record storage area 131 of the storage unit 13, the correction record D1 is not stored in the correction record storage area 131, that is, there is no correction record D1. Is determined. When the correction record D1 can be read from the correction record storage area 131 of the storage unit 13, the determination unit 15 determines that the correction record D1 is stored in the correction record storage area 131, that is, there is the correction record D1.

Further, the determination unit 15 determines that the correction recording use is used in the current numerical control process based on the correction recording use information 114 of the setting information D3, and sets the correction recording use invalid setting. In this case, it is determined that the correction record D1 is not used in the current numerical control process.

The determination unit 15 also includes the identification information of the machining program D2 stored in the machining program storage area 132 of the storage unit 13 and the correction included in the correction record D1 stored in the correction record storage area 131 of the storage unit 13. The identification information of the machining program D2 used when generating the record D1 is compared, and it is determined whether or not the identification information matches. When the identification information matches, the determination unit 15 determines that the machining program D2 used in generating the correction record D1 and the current machining program D2 are the same, that is, match. When the identification information does not match, the determination unit 15 determines that the machining program D2 used in generating the correction record D1 is different from the current machining program D2, that is, does not match.

Further, the determination unit 15 determines that the current numerical control processing is based on the pre-processing correction information 112 of the setting information D3, and the current numerical control processing is the pre-processing correction, that is, the drive command D7 is received from the drive command generation unit 18. If it is determined that the pre-processing correction is disabled, it is determined that the current numerical control processing is not pre-processing correction, that is, the drive command generator 18 outputs the drive command D7.

In addition, the determination unit 15 determines that the correction amount calculation unit 16 calculates the correction amount based on the correction processing information 111 of the setting information D3, and the correction amount calculation is disabled. Determines that the correction amount calculation unit 16 does not calculate the correction amount.

Further, the determination unit 15 stores the correction record D1 generated by the correction amount calculation unit 16 in the correction record storage area 131 of the storage unit 13 based on the correction record information 113 of the setting information D3 in the case of the setting of recording valid. If it is determined that recording is disabled, it is determined that the correction record D1 generated by the correction amount calculation unit 16 is not stored in the correction record storage area 131 of the storage unit 13.

As a result of the plurality of determinations, the determination unit 15 specifically determines whether the storage unit 13 has the correction record D1, whether to use the correction record D1, and the processing used when generating the correction record D1. The correction record D1 is stored, whether the program D2 and the current machining program D2 match, whether the current numerical control processing is correction before machining, whether the correction amount is calculated by the correction amount calculation unit 16, or not. The determination result D5 is output to the correction amount calculation unit 16 together with the setting information D3 and the analysis data D4. The determination unit 15 may output a plurality of determination results to the correction amount calculation unit 16 as a single determination result D5, or may individually output the plurality of determination results as a determination result D5. May be output. When the determination unit 15 determines that the correction amount calculation unit 16 does not calculate the correction amount, the determination unit 15 outputs only the determination result D5 to the correction amount calculation unit 16, and the setting information D3 and the analysis data D4 are corrected by the correction amount calculation unit. 16 may not be output.

The determination unit 15 outputs the determination result D5 and the analysis data D4 to the correction unit 17. In addition, the determination part 15 does not need to output only the determination result D5 to the correction | amendment part 17, and does not output the analysis data D4 to the correction | amendment part 17, when it determines with the present numerical control process being correction before a process.

The correction amount calculation unit 16 calculates a correction amount for the analysis data D4 after the analysis of the machining program D2 based on the determination result D5 input from the determination unit 15. Specifically, when the content of the determination result D5 acquired from the determination unit 15 does not include the correction record D1 or does not use the correction record D1, the correction amount calculation unit 16 analyzes data D4 input from the determination unit 15 Calculate the correction amount for. Further, the correction amount calculation unit 16 uses the processing result D5 obtained from the determination unit 15 in which the content of the determination result D5 includes the correction record D1, uses the correction record D1, and is used when the correction record D1 is generated. If the current machining program D2 matches, the correction record D1 stored in the correction record storage area 131 of the storage unit 13 is read, and the analysis data input from the determination unit 15 using the read correction record D1 A correction amount for the post-correction machining program D6 generated by correcting D4 is calculated.

Here, the correction amount calculation performed by the correction amount calculation unit 16 will be described. FIG. 2 is a diagram illustrating an example of calculation of the correction amount in the correction amount calculation unit 16 of the numerical controller 10 according to the embodiment of the present invention. In general, in a numerical control device, when a machining program output from a CAM (Computer Aided Manufacturing) is used as it is, if the tool or workpiece is moved according to the machining program and the workpiece is machined, the workpiece will be smooth. It may not be possible to process with a simple shape. Therefore, in the numerical control device, it is possible to machine the workpiece with a smooth shape by performing correction for correcting the machining position based on the machining positions indicated in the plurality of machining commands of the machining program. As an example, points 101 to 104 shown in FIG. 2 indicate the position of the tool indicated by the machining program before correction, and the dotted line 100 shown in FIG. 2 indicates the path of the tool in the machining program before correction, that is, the movement path of the tool. . 2 indicate the position of the tool indicated by the corrected machining program, and the solid line 200 shown in FIG. 2 indicates the tool trajectory in the corrected machining program, that is, the tool movement path. The positions of the points 101 to 104 shown in FIG. 2 are the first positions, and the positions of the points 201 to 204 shown in FIG. 2 are the second positions.

The numerical controller reads a machining command for the points 101 to 104 shown in FIG. 2, and corrects the tool position at the points 101 to 104 so that the workpiece can be machined in a smooth shape in the section of the machining command. I do. Specifically, the numerical controller corrects the machining position of the machining command at the point 101 to be corrected to the point 201 by the movement direction and the movement amount indicated by the vector amount (a). Further, the numerical control device corrects the machining position of the machining command at the point 102 to be corrected to the point 202 by the movement direction and the movement amount indicated by the vector quantity (b). Further, the numerical controller corrects the machining position of the machining command at the point 103 to be corrected to the point 203 by the movement direction and the movement amount indicated by the vector amount (c). Further, the numerical control device corrects the machining position of the machining command at the point 104 to be corrected to the point 204 by the movement direction and the movement amount indicated by the vector amount (d). In the numerical control device, by correcting the machining position in this way, the workpiece can be machined with a smooth tool movement locus, and as a result, the workpiece can be machined in a smooth shape.

In the present embodiment, as an example, the correction record D1 generated as a result of the correction amount calculation in the correction amount calculation unit 16 includes block number information indicating each processing command at the points 101 to 104 to be corrected. . The correction record D1 includes a correction amount for correcting the machining position in each machining command of the analysis data D4 to be corrected to the machining position in the corresponding machining command in the post-correction machining program D6, that is, the point 101 of the analysis data D4. Vector amounts (a) to (d) indicating the moving direction and moving amount from the position of ~ 104 to the position of the points 201 to 204 of the post-correction machining program D6. In this case, the correction amount calculation unit 16 can generate the correction record D1 as text format data. The calculation of the correction amount shown in FIG. 2 is an example, and the calculation of the correction amount in the correction amount calculation unit 16 of the numerical control apparatus 10 according to the embodiment of the present invention is performed by smooth fairing control, SSS (Super Smooth). It may be performed based on the same general control as in the past, such as Surface) control.

Even when the correction amount calculation unit 16 has already calculated the correction amount and generated the correction record D1, the correction amount calculation unit 16 corrects the analysis data D4 using the correction record D1 and performs the post-correction processing program D6. The correction amount can be calculated by the same method as in FIG.

When storing the correction record D1 generated by calculating the correction amount based on the determination result D5 input from the determination unit 15, the correction amount calculation unit 16 stores the correction record D1 in the correction record storage area 131 of the storage unit 13. If the correction record D1 generated by calculation of the correction amount is not stored, the correction record D1 is output to the correction unit 17. Specifically, when the recording validity is set, the correction amount calculation unit 16 adds the correction amount calculation result to the correction amount calculation result according to the data format, data size, information to be added, and the like specified by the correction recording information 113 of the setting information D3. Then, the identification information of the machining program D2 given to the analysis data D4 used in the calculation of the correction amount is given to generate the correction record D1. The correction amount calculation unit 16 stores the generated correction record D1 in the correction record storage area 131 of the storage unit 13 according to the data transfer speed and storage position information included in the correction record information 113. When the record invalidity is set, the correction amount calculation unit 16 outputs the correction record D1 to the correction unit 17 without storing the correction record D1 in the correction record storage area 131 of the storage unit 13. If the correction amount is not calculated based on the determination result D5 input from the determination unit 15, the correction amount calculation unit 16 ends the process.

The correction unit 17 corrects the analysis data D4 input from the determination unit 15 using the correction record D1 read from the correction record storage area 131 of the storage unit 13 or the correction record D1 input from the correction amount calculation unit 16. . The correction unit 17 corrects the machining position in the machining command of the analysis data D4 corresponding to the block number indicated by the correction record D1 with the correction amount corresponding to the block number indicated by the correction record D1. The correction unit 17 generates the corrected machining program D6 that is the final path reflecting the machining path based on the corrected machining position by the correction described above, and sends the generated corrected machining program D6 to the drive command generation unit 18. Output. Specifically, the correction unit 17 reads the points 101 to 104 in FIG. 2 indicated by the analysis data D4 input from the determination unit 15 from the correction recording storage area 131 of the storage unit 13 or from the correction amount calculation unit 16. The points 201 to 204 shown in FIG. 2 are calculated by correcting with the vector amounts (a) to (d) which are the correction amounts indicated by the input correction record D1, and based on the points 201 to 204 shown in FIG. A corrected machining program D6 reflecting the machining path indicated by the solid line 200 is generated and output to the drive command generator 18.

The correction unit 17 does not correct the analysis data D4 using the correction record D1 when the determination unit 15 determines that the current numerical control process is the pre-processing correction based on the determination result D5 input from the determination unit 15. Accordingly, the correction unit 17 does not generate the post-correction machining program D6 when the determination unit 15 determines that the current numerical control process is the pre-machining correction, that is, when the drive command generation unit 18 does not output the drive command D7. The post-correction machining program D6 is not output to the drive command generator 18.

The drive command generation unit 18 performs an interpolation process using the post-correction machining program D6 input from the correction unit 17, generates a drive command D7 for driving the drive unit 20, and generates the generated drive command D7. Output to the drive unit 20. In the drive command generation unit 18, when the determination unit 15 determines that the current numerical control process is pre-processing correction, the post-correction processing program D6 is not input from the correction unit 17 as described above. The command D7 is not generated.

The data input / output unit 19 inputs / outputs data between the external storage medium 30 and the storage unit 13. Specifically, the data input / output unit 19 reads out and inputs each information of the correction record D1, the machining program D2, and the setting information D3 stored in the storage unit 13, and inputs the input information. Output to the external storage medium 30 for storage. Alternatively, the data input / output unit 19 reads and inputs each information of the correction recording D1, the machining program D2, and the setting information D3 stored in the external storage medium 30 from the external storage medium 30, and inputs each input information. It outputs to the memory | storage part 13 and memorize | stores it. The data input / output unit 19 inputs only the information of the correction record D1 from the storage unit 13 and outputs the information to the external storage medium 30, and inputs only the information of the correction record D1 from the external storage medium 30 to the storage unit 13. It may be output and stored.

The external storage medium 30 is, for example, RAM (Random Access Memory), ROM (Read Only Memory), HDD (Hard Disk Drive), SSD (Solid State Drive), CD (Compact Disc) -ROM, DVD (Digital Versatile Disc). -Consists of removable memory devices such as ROM, SD (Secure Digital) memory card, flash memory, or a combination of these.

In the numerical controller 10, data and information such as correction recording D 1, machining program D 2, setting information D 3, analysis data D 4, determination result D 5, post-correction machining program D 6, and drive command D 7 are transmitted through the data line between the components. Input and output.

In the numerical control device 10, the correction record D1 generated in the calculation of the correction amount in the past numerical control processing stored in the storage unit 13 is used for the next numerical control processing. Thereby, in the numerical control device 10, even when the function of the correction amount calculation unit 16 is turned off in the numerical control processing when performing machining with the same machining program D 2, that is, when the correction amount calculation unit 16 does not calculate the correction amount. However, high-quality, high-speed and high-precision machining similar to the case where the correction amount calculation unit 16 calculates the correction amount can be realized.

Further, the numerical control device 10 can acquire the information of the correction record D1 generated by the other numerical control device 10 by using the external storage medium 30, and can use it by the own device. Further, in the numerical control device 10, the information of the correction record D <b> 1 generated by the own device can be used by another numerical control device 10 using the external storage medium 30.

Subsequently, the operation of the numerical control process in the numerical control apparatus 10 will be described. FIG. 3 is a flowchart showing an example of the operation of the numerical control process of the numerical controller 10 according to the present embodiment. Of the descriptions of the respective components described above, operations other than those relating to the data input / output unit 19 and the external storage medium 30 are shown.

First, in the numerical control device 10, the analysis unit 14 analyzes the machining program D2 to be numerically controlled (step S1). Next, the determination unit 15 checks whether or not there is a correction record D1 from the storage unit 13 (step S2). Specifically, the determination unit 15 determines that there is the correction record D1 when the correction record D1 can be read (step S2: Yes), and determines that there is no correction record D1 when the correction record D1 cannot be read. (Step S2: No).

When the determination unit 15 determines that there is the correction record D1 (step S2: Yes), the determination unit 15 confirms whether or not the correction record D1 is used (step S3). Specifically, the determination unit 15 confirms the correction record use information 114 included in the setting information D3 stored in the setting information storage area 133 of the storage unit 13. The determination unit 15 determines that the correction record D1 is used when the correction record use validity is set in the correction record use information 114 (step S3: Yes), and the correction record use invalidity is set in the correction record use information 114. If not, it is determined that the correction record D1 is not used (step S3: No).

If the determination unit 15 determines that the correction record D1 is to be used (step S3: Yes), does the processing program D2 used when generating the correction record D1 match the machining program D2 currently used in the numerical control process? It is confirmed whether or not (step S4). Specifically, the determination unit 15 identifies the machining program D2 given to the correction recording D1 read from the correction recording storage area 131 of the storage unit 13 and the processing read from the processing program storage area 132 of the storage unit 13. It is confirmed whether the identification information of the machining program D2 for identifying the program D2 is the same. The determination unit 15 determines that the machining program D2 used when generating the correction record D1 is the same as the machining program D2 currently used in the numerical control process if they are the same (step S4: Yes), and corrects if they are different. It is determined that the machining program D2 used at the time of generating the record D1 and the machining program D2 currently used in the numerical control process do not match (step S4: No).

When the determination unit 15 determines that the machining program D2 used when generating the correction record D1 and the machining program D2 currently used in the numerical control process do not match (step S4: No), an alarm is sent to the administrator. Error processing such as displaying a display or sounding an alarm is performed, and the processing is terminated (step S5). The determination unit 15 may display an alarm display or the like using the display unit 12 as error processing.

When the determination unit 15 determines that the machining program D2 used in the generation of the correction record D1 and the machining program D2 currently in use in the numerical control process match (step S4: Yes), the current numerical control process is It is confirmed whether or not the correction is before processing (step S6). Specifically, the determination unit 15 checks the pre-processing correction information 112 included in the setting information D3 read from the setting information storage area 133 of the storage unit 13. When the setting of the pre-processing correction information 112 is valid before the processing, the determination unit 15 determines that the current numerical control process is the pre-processing correction (Step S6: Yes), and the setting of the pre-processing correction information 112 is the processing. When pre-correction is invalid, it is determined that the current numerical control process is not pre-processing correction (step S6: No).

When the determination unit 15 determines that the current numerical control process is not pre-processing correction (step S6: No), the correction amount calculation unit 16 determines whether to calculate a correction amount (step S7). Specifically, the determination unit 15 checks the correction processing information 111 included in the setting information D3 read from the setting information storage area 133 of the storage unit 13. The determination unit 15 determines that the correction amount calculation unit 16 calculates the correction amount when the correction processing information 111 setting is valid (step S7: Yes), and the correction processing information 111 setting is invalid. In this case, it is determined that the correction amount calculation unit 16 does not calculate the correction amount (step S7: No).

When the determination unit 15 determines that the correction amount calculation unit 16 does not calculate the correction amount (step S7: No), the correction unit 17 stores the correction record stored in the storage unit 13 based on the determination result D5 from the determination unit 15. The correction record D1 generated by the correction amount calculation unit 16 by reading the past correction amount is read from the area 131 (step S8). The contents of the determination result D5 here include the correction record D1 (step S2: Yes), the correction record D1 is used (step S3: Yes), and the machining program D2 and the numerical value used when the correction record D1 is generated. The machining program D2 currently in use in the control process matches (step S4: Yes), the current numerical control process is not a pre-machining correction (step S6: No), and the correction amount calculation unit 16 does not calculate a correction amount ( Step S7: No). The correction unit 17 corrects the analysis data D4 input from the determination unit 15 using the read correction record D1 (step S9), and generates a post-correction machining program D6. The correction unit 17 outputs the generated post-correction machining program D6 to the drive command generation unit 18.

The drive command generation unit 18 generates a drive command D7 based on the post-correction machining program D6 input from the correction unit 17 and outputs the drive command D7 to the drive unit 20 because the current numerical control process is not pre-machining correction ( Step S10).

When the determination unit 15 determines that the correction amount calculation unit 16 calculates the correction amount (step S7: Yes), the correction amount calculation unit 16 performs correction recording in the storage unit 13 based on the determination result D5 from the determination unit 15. The correction record D1 is read from the storage area 131 (step S11). The contents of the determination result D5 here include the correction record D1 (step S2: Yes), the correction record D1 is used (step S3: Yes), and the machining program D2 and the numerical value used when the correction record D1 is generated. The machining program D2 currently in use in the control process matches (step S4: Yes), and the current numerical control process is not correction before machining (step S6: No), and the correction amount calculation unit 16 calculates the correction amount ( Step S7: Yes). The correction amount calculation unit 16 generates the corrected machining program D6 by correcting the analysis data D4 input from the determination unit 15 using the read correction record D1, and calculates the correction amount for the corrected machining program D6 ( Step S12). The correction amount calculation unit 16 calculates the correction amount for the post-correction machining program D6 by the same method as the calculation of the correction amount for the analysis data D4. Thereby, the correction amount calculation unit 16 generates a new correction record D1 from the calculation of the correction amount for the post-correction machining program D6. The correction amount calculation unit 16 generates a correction record D1 from the correction amount calculation result. At this time, the correction amount calculation unit 16 gives the identification information of the machining program D2 extracted from the analysis data D4 to the correction record D1.

Based on the determination result D5 from the determination unit 15, that is, the correction record information 113 included in the setting information D3 stored in the setting information storage area 133 of the storage unit 13, the correction amount calculation unit 16 corrects the correction recording information 113. If the recording setting is valid, it is determined that the correction record D1 is stored (step S13: Yes), and the correction record D1 is stored in the correction record storage area 131 of the storage unit 13 (step S14). Based on the determination result D5 from the determination unit 15, the correction amount calculation unit 16 determines that the correction record D1 is not stored when the setting of the correction record information 113 is invalid (step S13: No), and the correction record D1. Is output to the correction unit 17 (step S15).

When the correction amount calculation unit 16 stores the correction record D1 in the correction record storage region 131 of the storage unit 13, the correction unit 17 reads the correction record D1 read from the correction record storage region 131 of the storage unit 13, or the correction amount calculation. When the unit 16 has not stored the correction record D1 in the correction record storage area 131 of the storage unit 13, the analysis data D4 input from the determination unit 15 is used by using the correction record D1 input from the correction amount calculation unit 16. It correct | amends (step S16) and the correction | amendment process program D6 is produced | generated. The correction unit 17 outputs the generated post-correction machining program D6 to the drive command generation unit 18.

The drive command generation unit 18 generates a drive command D7 based on the post-correction machining program D6 input from the correction unit 17 and outputs the drive command D7 to the drive unit 20 because the current numerical control process is not pre-machining correction ( Step S17).

Returning to step S6, when the determination unit 15 determines that the current numerical control process is correction before processing (step S6: Yes), the correction amount calculation unit 16 stores the determination based on the determination result D5 from the determination unit 15. The correction record D1 is read from the correction record storage area 131 of the unit 13 (step S18). The contents of the determination result D5 here include the correction record D1 (step S2: Yes), the correction record D1 is used (step S3: Yes), and the machining program D2 and the numerical value used when the correction record D1 is generated. The machining program D2 currently in use in the control process matches (step S4: Yes), and the current numerical control process is a pre-machining correction (step S6: Yes). The correction amount calculation unit 16 generates the corrected machining program D6 by correcting the analysis data D4 input from the determination unit 15 using the read correction record D1, and calculates the correction amount for the corrected machining program D6 ( Step S19). Thereby, the correction amount calculation unit 16 generates a new correction record D1 from the calculation of the correction amount for the post-correction machining program D6. The correction amount calculation unit 16 generates a correction record D1 from the correction amount calculation result. At this time, the correction amount calculation unit 16 gives the identification information of the machining program D2 extracted from the analysis data D4 to the correction record D1.

The correction amount calculation unit 16 stores the correction record D1 in the correction record storage area 131 of the storage unit 13 (step S20).

If the determination unit 15 determines that there is no correction record D1 in step S2 (step S2: No), or if it is determined not to use the correction record D1 in step S3 (step S3: No), the current numerical control It is confirmed whether or not the processing is correction before processing (step S21). In the determination unit 15, the process of step S21 is the same as the process of step S6 described above.

When the determination unit 15 determines that the current numerical control process is not correction before processing (step S21: No), the correction amount calculation unit 16 corrects the analysis data D4 based on the determination result D5 from the determination unit 15. The amount is calculated (step S22). The content of the determination result D5 here is the correction record D1 (step S2: Yes), the correction record D1 is not used (step S3: No), and the current numerical control processing is not pre-processing correction (step S21: No), or there is no correction record D1 (step S2: No), and the current numerical control process is the content that is not pre-processing correction (step S21: No). The correction amount calculation unit 16 generates a correction record D1 from the correction amount calculation result. At this time, the correction amount calculation unit 16 gives the identification information of the machining program D2 extracted from the analysis data D4 to the correction record D1.

Based on the determination result D5 from the determination unit 15, that is, the correction record information 113 included in the setting information D3 stored in the setting information storage area 133 of the storage unit 13, the correction amount calculation unit 16 corrects the correction recording information 113. If the recording setting is valid, it is determined that the correction record D1 is stored (step S23: Yes), and the correction record D1 is stored in the correction record storage area 131 of the storage unit 13 (step S24). Based on the determination result D5 from the determination unit 15, the correction amount calculation unit 16 determines that the correction record D1 is not stored when the setting of the correction record information 113 is invalid (step S23: No), and the correction record D1. Is output to the correction unit 17 (step S25).

When the correction amount calculation unit 16 stores the correction record D1 in the correction record storage region 131 of the storage unit 13, the correction unit 17 reads the correction record D1 read from the correction record storage region 131 of the storage unit 13, or the correction amount calculation. When the unit 16 has not stored the correction record D1 in the correction record storage area 131 of the storage unit 13, the analysis data D4 input from the determination unit 15 is used by using the correction record D1 input from the correction amount calculation unit 16. It correct | amends (step S26) and the correction | amendment process program D6 is produced | generated. The correction unit 17 outputs the generated post-correction machining program D6 to the drive command generation unit 18.

Since the current numerical control process is not pre-machining correction, the drive command generation unit 18 generates a drive command D7 from the post-correction machining program D6 input from the correction unit 17 and outputs it to the drive unit 20 (step S27). ).

When the determination unit 15 determines that the current numerical control process is correction before processing (step S21: Yes), the correction amount calculation unit 16 corrects the analysis data D4 based on the determination result D5 from the determination unit 15. The amount is calculated (step S28). The content of the determination result D5 here is the correction record D1 (step S2: Yes), the correction record D1 is not used (step S3: No), and the current numerical control process is a pre-processing correction (step S21: Yes), or there is no correction record D1 (step S2: No), and the current numerical control process is a pre-processing correction (step S21: Yes). The correction amount calculation unit 16 generates a correction record D1 from the correction amount calculation result. At this time, the correction amount calculation unit 16 gives the identification information of the machining program D2 extracted from the analysis data D4 to the correction record D1.

The correction amount calculation unit 16 stores the correction record D1 in the correction record storage area 131 of the storage unit 13 (step S29).

In the flowchart shown in FIG. 3, the numerical control device 10 can realize high-quality machining without calculating the correction amount by using the correction record D1 by the operation that ends in the process of step S10. In addition, the numerical control device 10 can re-correct the correction record D1 by the operation that ends in the process of step S17, thereby realizing higher quality processing. Further, the numerical control device 10 can re-correct the correction record D1 before the processing is started by the operation that ends in the process of step S20, thereby realizing higher quality processing. The operation that ends in the process of step S27 is an operation that is performed when the numerical control device 10 first performs the numerical control process using the machining program D2. The operation that ends in the process of step S29 is an operation that is performed when the correction record D1 is acquired before the actual machining is started when the machining program D2 is first used in the numerical control apparatus 10. In the flowchart shown in FIG. 3, in the case of the pre-processing correction (step S6: Yes and step S21: Yes), the numerical control device 10 stores the correction record D1 generated from the correction amount calculation result in the storage unit 13. Although it is possible in the operation not to be stored in the area 131, the correction record D1 is stored in the correction record storage area 131 of the storage unit 13 in view of the purpose of the pre-processing correction (step S20 and step S29).

In the present embodiment, the process of correcting the machining position indicated by the machining command of the machining program D2 has been described, but the present invention is not limited to this. For example, the present invention can also be applied when correcting the machining speed indicated by the machining command. In the present embodiment, the correction record D1 is in the form of the block number of the machining command and the vector quantity indicating the movement direction and the movement amount of the machining position. However, the present invention is not limited to this. For example, the information stored based on the calculation of the correction amount in the correction record D1 may be used as the position information of the corrected machining position instead of the vector amount. The format of the correction record D1 may be the format of analysis data of the entire machining program that reflects the corrected machining position.

When the format of the correction record D1 is set to the format of the analysis data of the entire machining program reflecting the corrected machining position, the correction unit 17 uses the correction record D1 read from the correction record storage area 131 of the storage unit 13. Thus, the correction process for the analysis data D4 input from the determination unit 15 can be omitted. In the flowchart shown in FIG. 3, in the case of Step S2: Yes, Step S3: Yes, Step S4: Yes, Step S6: No, and Step S7: No, the correction unit 17 reads the correction record D1 (Step S8), The read correction record D1 is output to the drive command generator 18 as a post-correction machining program D6. That is, the correction unit 17 can omit the correction process of the analysis data D4 shown in step S9. Thereby, in addition to the reduction of the load for calculating the correction amount, the numerical control device 10 can further reduce the load for the correction processing. When the format of the correction record D1 is set to the format of the analysis data of the entire machining program reflecting the corrected machining position, the correction unit 17 reads the correction record D1 read without correction in the second and subsequent processes. Is used as the post-correction machining program D6, the analysis data D4 is not used. Therefore, in the numerical controller 10, the analysis process of the analysis unit 14 shown in step S1 may be omitted in the flowchart shown in FIG.

Next, a hardware configuration for realizing each configuration of the numerical control apparatus 10 shown in FIG. 1 will be described. FIG. 4 is a diagram illustrating an example of a hardware configuration of the numerical control device 10 according to the present embodiment. The numerical controller 10 is realized by the processing circuit 91. The setting unit 11 and the display unit 12 are realized by a monitor 94 and an input / output interface 96. The storage unit 13 is realized by the memory 93. The analysis unit 14, the determination unit 15, the correction amount calculation unit 16, and the correction unit 17 are realized by the CPU 92 executing a program for each component stored in the memory 93. The drive command generator 18 is realized by the amplifier control circuit 95. The data input / output unit 19 is realized by an input / output interface 96. The CPU 92, memory 93, monitor 94, amplifier control circuit 95, and input / output interface 96 are connected by a system bus 97. The CPU 92 is, for example, a central processing unit, a processing unit, an arithmetic unit, a microprocessor, a microcomputer, a DSP (Digital Signal Processor), or the like.

The functions of the analysis unit 14, the determination unit 15, the correction amount calculation unit 16, and the correction unit 17 are realized by software, firmware, or a combination of software and firmware. Software and firmware are described as programs and stored in the memory 93. These programs can be said to cause the computer to execute the procedures and methods of the analysis unit 14, the determination unit 15, the correction amount calculation unit 16, and the correction unit 17. The memory 93 is, for example, a nonvolatile or volatile semiconductor memory such as RAM, ROM, flash memory, EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), magnetic disk, flexible disk, optical disk, compact disk, mini disk, etc. Disk, DVD, etc.

As described above, according to the present embodiment, in the numerical control apparatus 10 that performs machining by numerically controlling the machine tool, the correction amount is calculated when the analysis data D4 after the analysis of the machining program D2 is corrected. When the generated correction record D1 is stored and then the numerical control process is performed using the same machining program D2, the correction record D1 is used and the correction amount is not calculated. Thereby, in the numerical control device 10, when the same machining program D2 is used, the load due to the calculation of the correction amount can be obtained by using the correction record D1 generated until the previous machining without calculating the correction amount. High-quality processing can be realized while reducing

Further, in the numerical control device 10, higher-quality machining can be realized by calculating the correction amount using the correction record D 1, that is, performing re-correction. Further, the numerical control device 10 can calculate the correction amount before processing and store the correction record D1. Further, in the numerical control device 10, the correction record D <b> 1 is output to the other numerical control device 10 using the external storage medium 30, or another numerical control device 10 is used from the other numerical control device 10 using the external storage medium 30. By acquiring the correction record D1 generated in step S1, the correction record D1 can be used by a plurality of numerical control devices 10.

The configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

10 numerical control device, 11 setting unit, 12 display unit, 13 storage unit, 14 analysis unit, 15 determination unit, 16 correction amount calculation unit, 17 correction unit, 18 drive command generation unit, 19 data input / output unit, 20 drive unit 30 External storage medium.

Claims

An analysis unit that analyzes a machining program and generates analysis data;
A correction amount calculation unit for calculating a correction amount of the analysis data and generating a correction record;
A storage unit for storing the correction record generated by the correction amount calculation unit;
A numerical control device comprising:
A correction unit that corrects the analysis data using the correction record and generates corrected analysis data;
A drive command generation unit that generates a drive command using the corrected analysis data;
The numerical control apparatus according to claim 1, comprising:
When the storage unit stores setting information in numerical control processing,
A determination unit for determining whether to calculate the correction amount based on the setting information;
With
When the determination unit determines that the correction amount is to be calculated, the correction amount calculation unit calculates the correction amount of the analysis data and generates the correction record.
The numerical control apparatus according to claim 2.
The determination unit outputs the analysis data input directly or indirectly from the analysis unit to the correction unit,
The correction unit corrects the analysis data input from the determination unit using the correction record read from the storage unit.
The numerical control apparatus according to claim 3.
The determination unit outputs a determination result determined not to calculate the correction amount by the correction amount calculation unit based on the setting information to the correction amount calculation unit, and is input directly or indirectly from the analysis unit. Output the analysis data to the correction unit,
The correction amount calculation unit does not calculate the correction amount when the determination unit determines not to calculate the correction amount,
The correction unit reads the correction record from the storage unit, and corrects the analysis data input from the determination unit using the read correction record.
The numerical control apparatus according to claim 3.
The determination unit outputs a determination result determined not to output the drive command from the drive command generation unit based on the setting information to the correction unit,
The correction unit does not generate the post-correction analysis data when it is determined that the determination unit does not output the drive command from the drive command generation unit,
The numerical control apparatus according to claim 3.
The determination unit compares the identification information of the machining program stored in the storage unit with the identification information of the machining program used when generating the correction record given to the correction record, It is determined whether or not the machining program used when generating the correction record and the machining program stored in the storage unit are the same.
The numerical control apparatus according to any one of claims 3 to 6, wherein:
A data input / output unit for storing the correction record read from the storage unit in an external storage medium;
The numerical control apparatus according to claim 3, further comprising:
The data input / output unit stores a correction record generated by another numerical control device read from the external storage medium in the storage unit;
The numerical control apparatus according to claim 8.
The correction recording is a movement direction from the processing position to the second position for correcting the processing position in the processing command of the analysis data to the second position in the corresponding processing command in the post-correction analysis data. And a vector quantity indicating the amount of movement,
The numerical control apparatus according to claim 3, wherein the numerical control apparatus is a unit.