JP2018073296A - Machining control system for machine tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a machining control system for a machine tool for avoiding inconsistency between a machining program and a machining work.SOLUTION: A machining control system for a machine tool is comprised of: one or more than two machine tools for executing predetermined processing on workpieces A to D in accordance with a machining program stored in a control unit; master workpieces 25A to 25D which are provided corresponding to the workpieces and to which an information display member indicating the machining program related to information of the machining program concerning the machining works to be machined by the machine tool are attached; and information reading means for reading the machining program related to the information from the information display member. A machining program stored in the control unit is specified in the one or more than two machine tools according to the machining program related to the information read by the reading means.SELECTED DRAWING: Figure 3

Description

  The present invention is a machining control system related to a machine tool for avoiding a mismatch between a machining program and a workpiece.

  In the machine tool, a machining program corresponding to a plurality of machining is stored in the control device, and an appropriate machining program is selected according to machining of a workpiece to be processed. Therefore, in a machine tool, a corresponding tool is selected from a turret device or the like, and a predetermined machining is performed on the workpiece. At this time, at the work site, a workpiece is input to the machine tool by an operator, and a corresponding machining program number is set from among a plurality of machining programs by an input operation. At this time, if the types of machining workpieces increase and the number of machining programs increases accordingly, there is a high possibility that an operator input error will occur.

  In this regard, Patent Document 1 below discloses an automatic machining system that automatically assigns a machining program to a machine tool. In this automatic machining system, a barcode on which identification information for identifying the workpiece is stored is attached to the tray on which the workpiece is mounted. When the tray is carried to the machine tool, the identification information is transferred to the barcode reader. Read by. On the other hand, each machine tool stores a machining program in advance, and when workpieces are sequentially conveyed to each machine tool by a tray, machining control according to the corresponding machining program is executed based on the read identification information. Is done.

Japanese Patent Laid-Open No. 11-070443

  As described above, when the operator inputs the machining program number via the input device, an input error, that is, a human error may occur. In this regard, it can be said that the automatic machining system of the above-described conventional example takes an improvement measure to prevent an input error because a corresponding machining program is automatically assigned by reading a barcode. However, in the first place, when a workpiece is loaded on the tray, an incorrect one may be loaded, and there may be a problem before the machining program is automatically assigned. If the machining workpiece does not correspond to the machining program (machining content), problems such as damage to the tool due to machining of the wrong machining workpiece may occur. Therefore, in machining in a machine tool, the problem is how to eliminate human errors caused by workers.

  Accordingly, an object of the present invention is to provide a machining control system related to a machine tool for avoiding inconsistency between a machining program and a workpiece to solve such a problem.

  The machining control system related to the machine tool of the present invention is prepared corresponding to one or two or more machine tools that execute predetermined machining on a workpiece according to a machining program stored in a control unit, and the workpiece. A master work provided with an information display member indicating processing program related information of the processing program related to the processing work to be processed by the machine tool, and information reading means for reading the processing program related information from the information display member. In accordance with the machining program related information read by the reading means, the machining program stored in the control unit is specified in the one or more machine tools.

  According to the configuration of the above disclosure, the processing program related information is read from the information display member of the master work by the information reading means, and the control unit corresponds to the processed work in one or more machine tools according to the processing program related information. The machining program stored in is identified. Therefore, it is possible to prevent input errors in machining program related information that the operator inputs for each machine tool, and to eliminate reading errors by reading the same information from the master work information display member. In addition, this leads to making the operator aware of inconsistencies in the workpieces prepared with the master workpiece.

It is the front view which showed the processing machine line. It is the figure which showed the relationship between each module in a processing machine line. It is an image figure showing the processing work prepared corresponding to a plurality of processing. It is the flowchart which showed the setting process of the process program performed with a process control system. It is the image figure which showed the case where one master workpiece respond | corresponds to two types of process workpieces.

  Next, an embodiment of a machining control system for a machine tool according to the present invention will be described below with reference to the drawings. The machining control system according to the present embodiment is mounted on a machine tool and will be described for use in a machining machine line including a plurality of machine tools. FIG. 1 is a front view showing the processing machine line. This processing machine line 100 includes various modules such as a lathe, a machining center, or a measuring machine between a workpiece loading module 1 at the right end of the drawing as a workpiece carry-in portion and a workpiece discharge module 11 at the left end of the drawing as a workpiece carry-out portion. It is installed side by side. Then, the processed workpiece sent from the workpiece input module 1 is conveyed to the workpiece discharge module 11 on the left side of the drawing through processes in various modules, such as cutting is performed by a module such as a lathe. .

  As the modules constituting the processing machine line 100, lathe modules 2 and 3 are installed next to the workpiece input module 1, and the inspection module 4 is installed next to the lathe modules 2. Therefore, after the first workpiece and the second machining are performed on the lathe modules 2 and 3, the machining module 4 confirms the dimensional accuracy of the machined workpiece after the machining. Next to the inspection module 4, a workpiece table module 5 is installed as a temporary placement for processing workpiece transfer and quality check. Then, a machining center module 6 that performs boring, drilling, and the like is installed next to the workpiece placing module 5 so that the third machining is performed on the workpiece.

  Further, a second workpiece placing table module 7 capable of temporarily placing and removing the workpiece is installed, and a hobbing machine module 8 for performing gear cutting is installed next to the second workpiece platform module 7 so that the fourth machining is performed on the workpiece. It has become. Then, a deburring module 9 for removing burrs generated on the workpiece and a cleaning module 10 for washing off chips and the like attached to the workpiece are sequentially installed, and a workpiece discharge module 11 is installed next to the cleaning module 10. . The processing machine line 100 includes a plurality of such modules 1 to 11, and a predetermined processing or the like is performed while the workpiece is moved between the modules 1 to 11.

  Therefore, the processing machine line 100 is provided with a workpiece transfer device for transferring the workpiece to each module 1-11. The workpiece transfer device is constituted by two transfer work machines 15 in which a multi-joint robot arm 152 is turnably mounted on a running table 151 that moves on a running rail provided in front of each module 1-11. ing. The two transfer work machines 15 each move independently on the same traveling rail, and the workpieces are transferred between the modules 1 to 11. The processing machine line 100 is entirely covered with an exterior cover 18, and an opening / closing cover 19 is provided at the front. The opening / closing cover 19 constitutes one transfer space that extends in the width direction in which the transfer work machine 15 moves.

  The modules 2 to 10 are respectively mounted on the base 13 (see FIG. 2). Two rails are laid at the same width interval on the base 13 so that two modules can be mounted, and for example, lathe modules 2 and 3 are mounted in such a manner that they can move in the front-rear direction. ing. In the case of the processing machine line 100, five bases 13 are arranged side by side in close proximity to the modules 2 to 10, and two modules are mounted on each base 13. However, only the large hobbing machine module 8 is mounted in one unit.

  FIG. 2 is a diagram showing the relationship between modules in the processing machine line 100. Each base 13 is provided with a hub (HUB) 21 that is a concentrator, and a control panel 22 that performs drive control of the drive unit in each of the modules 1 to 11 is connected. Further, a LAN (Local Area Network) in which the hubs 21 are connected to each other and the control panels 22 are connected to each other is constructed. The predetermined module is provided with an operation panel 17 that is an input and display device, and is connected to the control panel 22. Each of the two transfer work machines 15 is also provided with a transfer control panel (not shown), which is also connected to the hub 21.

  In the control panel 22 of each of the modules 1 to 11, machining programs relating to various machining, types of workpieces, workpiece machining information relating to tools and jigs, and the like are stored as a database. The machining program stored in the control panel 22 includes a lathe module 2, 3, a machining center module 6, a hobbing module 8, and a deburring module 9 (hereinafter collectively referred to as “processing modules 2, 3, 6, 8, 9 ”) shows various processing contents such as cutting and drilling for the workpiece to be executed.

  In the processing machine line 100, various types of processing are performed, and processing workpieces corresponding to the number of lots are prepared. FIG. 3 is an image diagram showing four types of prepared workpieces. In the processing machine line 100, a stocker is placed at a position where a processing work is carried. That is, although not shown in detail, when a workpiece stocker is placed next to the workpiece input module 1 and machining is performed on four types of machining workpieces as in the present embodiment, machining workpieces A, B, C, and D are there. Are placed in a distinguished state. Then, the master work 25 (25A, 25B, 25C, 25D) corresponding to each processed work A, B, C, D is placed in the stocker together. The master workpiece 25 is made of the same material as the corresponding workpiece and is formed in the same shape and size, and is used for seating confirmation by a chuck device.

  In the machining modules 2, 3, 6, 8, and 9, machining programs for machining such machining workpieces A, B, C, and D are stored in advance. Therefore, for example, when the machining of the machining workpiece A is finished and the machining workpiece B is machined, the machining program to be executed is changed. In such a case, according to the conventional change, the operator inputs the corresponding machining program number on the operation panels 17 of the machining modules 2, 3, 6, 8, and 9 in which machining is performed.

  However, an operation performed manually by an operator may cause an input error. In particular, the more types of workpieces, the higher the possibility of mistakes. In addition, in the case of a processing machine line with a large number of processing modules, it is necessary to input a change of the processing program in each processing module. This will increase the possibility of causing input errors. An error in inputting the machining program number causes machining different from the original machining program corresponding to the workpiece to be processed, resulting in tool breakage or waste of the workpiece.

  Further, human errors that may occur in the processing machine line 100 may cause errors not only in the input to the operation panel 17 described above, but also in the mounting of processing workpieces prepared in advance in the stocker, for example. That is, this is a case where the machining workpiece E is prepared where the machining workpiece D should be prepared. In such a case, even if the worker inputs the machining program number according to the machining workpiece D according to the machining schedule, since the machining workpiece E is actually machined, problems such as the above-described tool breakage are similarly caused. Will occur.

  Therefore, a machining control system for avoiding such a human error is constructed in the machining machine line 100 of the present embodiment. In the processing machine line 100, as shown in FIG. 2, the control panels 22 of the modules 1 to 11 are connected to each other via a communication cable. Further, a bar code reader 23 attached to the workpiece input module 1 is connected to such a control panel 22 so that the read information is transmitted to each control panel 22. The barcode reader 23 reads the barcode 26 (26A, 26B, 26C, 26D) attached to the master work 25 (25A, 25B, 25C, 25D). In the barcodes 26A, 26B, 26C, and 26D, machining program information of the corresponding machining workpieces A, B, C, and D, that is, machining program numbers are stored.

  Therefore, in the present embodiment, the program number that has been directly input from the operation panel 17 by the operator so far is changed by reading the barcode 26 attached to the master work 25 using the barcode reader 23. It has come to be. That is, in each of the machining modules 2, 3, 6, 8, and 9, machining program related information (here, the machining program number) read from the barcode 26 is transmitted. In the control panel 22 that has received the information, a machining program corresponding to the corresponding number is specified from a machining program stored in advance, and drive control is executed in accordance with the machining program.

  Next, the operation of the processing control system of the processing machine line 100 will be described. FIG. 4 is a flowchart showing machining program setting processing performed in the machining control system. This machining setting program is stored in the control panel 22 of the workpiece input module 1 close to the worker who uses the barcode reader 23, for example. However, in this processing machine line 100, since the operation panel 17 of the workpiece input module 1 can be accessed regardless of which control panel 22 is stored, the storage location of the processing setting program is not particularly limited.

  First, in the processing machine line 100, the processing program related information regarding the processing content is read for all of the master workpiece 25A or the master workpieces 25B, 225C, and 25D mounted on the stocker at the start of processing. That is, when the operator uses the bar code reader 23, the machining program number is read from the bar code 26 attached to the master work 25. Such an operation is performed when the operator directly applies the barcode reader 23 to the master work 25 mounted on the stocker. At this time, the operator may check whether the master workpieces 25A, 25B, 25C, 25D and the machining workpieces A, B, C, D correspond to each other at the same time as reading the machining program related information. it can.

  Then, the machining program setting process shown in FIG. 4 is executed on the control panel 22 of the workpiece input module 1 by the reading operation of the machining program related information. First, a check is made as to whether or not a barcode has been scanned by the barcode reader 23 (S101). Therefore, if there is no scan (S010: NO), the machining program setting process is terminated as it is. On the other hand, when the scan is performed by the operator (S101: YES), the machining program number read from the barcode 26 is stored (S102). Then, the information of the machining program number is transmitted to the control panel 22 of the machining modules 2, 3, 6, 8, 9 (S103). Therefore, if the transmitted machining program number is for the machining workpiece A, for example, each machining module 2, 3, 6, 8, 9 automatically changes to the machining program for machining the machining workpiece A. .

  Next, a machining number input screen is displayed on the operation panel 17 of the workpiece input module 1 (S104). Therefore, the operator performs an operation of inputting the number of workpieces for the workpiece A. At this time, when scanning is performed for all of the master workpieces 25A, 25B, 25C, and 25D, an input screen is displayed for each machining workpiece A, B, C, and D. Done. Thereafter, input completion confirmation of the machining number setting is performed (S105). That is, a confirmation button is displayed on the operation panel 17 of the workpiece input module 1 after the machining number is input. Therefore, the input is completed by operating the confirmation button (S105: YES).

  Next, the cycle time corresponding to the number of machining workpieces A, B, C, and D is displayed on the operation panel 17 of the workpiece input module 1 in accordance with the machining number setting input (S107). The cycle time is calculated from the machining time of each process in each machining module and the number of machining workpieces input, and the time is displayed. Further, according to the input of the number of machining, it is confirmed whether or not the set number of times of use of the tool used in each machining module 2, 3, 6, 8, 9 has been reached (S106). In each machining module 2, 3, 6, 8, and 9, the number of machining operations is counted for each tool. Therefore, from the transmitted machining program number, the tool used in the machining program and the cumulative usage count of the tool are You can get it. Therefore, if there is an input of the number of workpieces to be processed in step S104, the scheduled number of uses including the added number of workpieces is compared with the set number of uses for the corresponding tool.

  Therefore, when the scheduled use count exceeds the set use count, a warning is displayed on the operation panel 17 of the workpiece input module 1 or the corresponding machining module (S108), and the scheduled use count reaches the set use count. If not, the process is terminated as it is. When the warning is displayed in step S108, when the tool is changed in advance by the operator, the machining module is stopped and the tool is changed before machining. In addition, when using the tool up to the set number of times of use, the operator confirms the number of pieces to be processed, and when the actual number of uses reaches the set number of uses, the drive of the corresponding machining module is stopped and tool change is performed. Is called.

  In the processing machine line 100, the processing program setting process is performed as described above. On the other hand, outside the processing machine line 100, the workpiece A of the stocker is transferred to the workpiece input module 1 by the operator. Then, the machining is executed by inputting the machining start button, the machining work is transferred from the workpiece input module 1 to the corresponding modules 1 to 11 by the transfer work machine 15, and the machining modules 2, 3, and 6 that have received the machining workpiece. , 8 and 9, machining control is executed in accordance with the machining program set by the machining program setting process.

  Further, when the machining workpieces A, B, C, and D are continuously machined, machining programs are automatically changed at predetermined timings in the machining modules 2, 3, 6, 8, and 9. That is, the machining modules 2, 3, 6, 8, and 9 store the machining program number transmitted in step S103 shown in FIG. 4 and the information on the machining number transmitted in step S104. Therefore, in machining modules 2, 3, 6, 8, and 9, when machining of machining workpiece A is completed, the machining program to be controlled is automatically switched from machining workpiece A to that corresponding to machining workpiece B. It is done. Then, after that, the machining program corresponding to the order of the machining workpieces C and D is automatically changed at a predetermined timing, and each machining is executed.

  Therefore, in the machining control system of this embodiment, the operator does not directly input the machining program number to the machining modules 2, 3, 6, 8, and 9, and the machining program number read by the barcode reader 23 The machining program is automatically set by transmission. Therefore, it is possible to prevent an input error of the machining program. In addition, the operator's reading operation using the barcode reader 23 is performed on the barcode 26 of the master work 25 placed in the stocker instead of the barcode attached to the processing list or the like. Therefore, since it is a relatively simple operation, a reading error or the like is likely to occur. However, by reading the barcode 26 of the master work 25, the reading error can be avoided.

  Moreover, since the workpieces A, B, C, and D are placed near the master workpieces 25A, 25B, 25C, and 25D, the operator reads each master workpiece 25 with the barcode reader 23. It is also possible to confirm the coincidence between the master workpieces 25, 25B, 25C, 25D and the workpieces A, B, C, D. Therefore, reading the barcode 26 of the master work 25 can eliminate reading errors as described above, and errors that occur in the previous stage, that is, errors in mounting the machining work that occurs in the stage prepared in the stocker. This also leads to the avoidance of human error.

  Incidentally, FIG. 5 is an image diagram showing a case where one master workpiece corresponds to two types of machining workpieces. That is, there is a case where a master work and a machining work are not only one-to-one correspondence, but a common master work exists for a plurality of machining works. Therefore, it is assumed that machining program related information for a plurality of machining workpieces, that is, machining program numbers corresponding to the machining workpieces, are stored in the barcode attached to the common master workpiece. That is, the master workpiece 25F corresponds to the machining workpieces A and B, and the master workpiece 25G corresponds to the machining workpieces C and D. The attached barcode 26F stores the machining program numbers for the workpieces A and B, and the barcode 26G stores the machining program numbers for the workpieces C and D.

  In the above embodiment, the machining number input screen is displayed on the operation panel 17 in step S104, and the number of machining is input for each of the workpieces A, B, C, and D by the operator. However, the barcode 26 attached to the master workpiece 25 may store not only the machining program number for the machining workpieces A, B, C and D but also the machining number information. Thereby, the input mistake of the processing number can also be avoided.

As mentioned above, although one Embodiment of the process control system of this invention was described, this invention is not limited to this, A various change is possible in the range which does not deviate from the meaning.
For example, in the above-described embodiment, the processing control system constructed in the processing machine line 100 in which a plurality of processing modules are installed is shown and described. However, this processing control system may be for one machine tool. .

1 to 11 ... Module 17 ... Operation panel 22 ... Control panel 23 ... Bar code reader 25 (25A, 25B, 25C, 25D) ... Master work 26 (26A, 26B, 26C, 26D) ... Bar code

Claims (4)

One or more machine tools that execute predetermined machining on the workpiece according to the machining program stored in the control unit;
A master work provided with an information display member indicating processing program related information of the machining program related to the machining work to be machined with the machine tool;
Information reading means for reading machining program related information from the information display member,
A machining control system related to a machine tool in which a machining program stored in the control unit is specified in the one or more machine tools according to the machining program related information read by the reading unit.   The machining control system for a machine tool according to claim 1, wherein the machining program related information is a machining program number corresponding to one or more machining programs stored in a control unit of the machine tool.   The said master workpiece | work respond | corresponds to two or more different machining workpieces, The information display member attached | subjected to the said master workpiece | work contains the machining program relevant information regarding these corresponding several machining workpieces. 2. A machining control system for the machine tool according to 2. The machine tool includes machining program related information of the machining program relating to two or more different workpieces, machining number information of the machining workpiece included in the machining program related information, or machining number information of the machining workpiece input from an input device. The machining control system for a machine tool according to any one of claims 1 to 3, wherein a plurality of corresponding machining programs are switched according to a predetermined number of machining processes.

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