Maintenance system for wire electrical discharge machining apparatus, wire electrical discharge machining apparatus, and maintenance diagnosis apparatus

Abstract

In the maintenance system of an on-line electric discharge machining apparatus, there are provided: a management device (5) that manages reference maintenance data indicating a state that maintenance of reference components of a factory-completed wire electric discharge machining apparatus is required, in accordance with a group determined based on the attribute information of the factory-completed wire electric discharge machining apparatus; a wire electric discharge machining apparatus (1) that transmits reference data indicating a reference state of an object component and usage state data indicating a usage state; and a maintenance diagnosis device (6) that receives the attribute information of the wire electric discharge machining apparatus 1, selects a group based on the attribute information, calls the reference maintenance data of the selected group from the management device (5), and diagnoses that maintenance is required when the usage state data received from the wire electric discharge machining apparatus (1) reaches the reference maintenance data. Thus, it is possible to accurately determine the timing for maintenance such as component replacement of the wire electric discharge machining apparatus.

Description

Technical Field

[0001] The present invention relates to a maintenance system for a wire electrical discharge machining apparatus, a wire electrical discharge machining apparatus, and a maintenance diagnostic apparatus. Background Art

[0002] A wire electrical discharge machining apparatus is a machine tool capable of performing high-precision machining with a tolerance of 1 / 100 to 1 / 1000 mm. However, if used for a long time, traveling system components such as pulleys will wear or become eccentric, causing vibrations, which will cause tension fluctuations. Therefore, maintenance such as component replacement is required.

[0003] For example, in Patent Document 1, a wire traveling system maintenance system for a wire electrical discharge machine is disclosed, which measures physical quantities corresponding to the tension of a wire, obtains their average values, fluctuations, and frequency analysis data as analysis results, compares the analysis results with reference values at the time of replacement of consumables, etc., and determines whether maintenance is required. Moreover, with this configuration, the replacement time of consumables can be accurately determined.

[0004] Patent Document 1: International Publication No. 2010 / 116412 Summary of the Invention

[0005] However, Patent Document 1 has the following problem. That is, when the variation from the reference value of the physical quantity of the consumable exceeds a preset amplitude determination value, the maintenance period is determined. Therefore, if the amplitude determination value is decreased, replacement is required frequently, and if the amplitude determination value is increased, the machining quality will deteriorate before determination.

[0006] The present invention has been made in view of the above problems, and an object thereof is to obtain a maintenance system for a wire electrical discharge machining apparatus, a wire electrical discharge machining apparatus, and a maintenance diagnostic apparatus capable of accurately determining the maintenance period.

[0007] The maintenance system of the wire electrical discharge machining apparatus according to the present invention includes: a management device that manages reference maintenance data indicating the state of maintenance required for reference components of a factory-completed wire electrical discharge machining apparatus according to groups determined based on the attribute information of the factory-completed wire electrical discharge machining apparatus, and accumulates data related to the usage method of the factory-completed wire electrical discharge machining apparatus according to groups; a wire electrical discharge machining apparatus that has an alarm data acquisition unit that transmits reference data indicating the reference state of an object component and usage state data indicating the usage state, and acquires alarm data for alerting the user; and a maintenance diagnosis device that receives the attribute information of the wire electrical discharge machining apparatus, selects a group based on the attribute information, calls the reference maintenance data of the selected group from the management device, and diagnoses that maintenance is required when the usage state data received from the wire electrical discharge machining apparatus reaches the reference maintenance data, and when alarm data is acquired from the wire electrical discharge machining apparatus, calls the data of the factory-completed wire electrical discharge machining apparatus accumulated in the group selected based on the attribute information from the management device. The wire electrical discharge machining apparatus analyzes the improvement method based on the data of the group accumulated from the factory-completed wire electrical discharge machining apparatus received from the maintenance diagnosis device, and outputs the analyzed improvement method as an improvement proposal.

[0008] The wire electrical discharge machining apparatus according to the present invention includes: a data acquisition unit that acquires reference data indicating the reference state of an object component and usage state data indicating the usage state, and transmits them to the maintenance diagnosis device; an attribute information transmission unit that transmits attribute information; an alarm data acquisition unit that acquires alarm data for alerting the user; an improvement method analysis unit that analyzes an improvement method based on the alarm data; and an improvement method proposal unit that outputs the improvement method as an improvement proposal, diagnoses that maintenance is required when the usage state data reaches the reference maintenance data indicating the state of maintenance required for reference components of a factory-completed wire electrical discharge machining apparatus managed according to groups determined based on the attribute information, and the improvement method analysis unit analyzes the improvement method based on the data related to the usage method of the group having the same attribute information as that accumulated from the factory-completed wire electrical discharge machining apparatus.

[0009] The maintenance diagnosis device according to the present invention receives the usage state data indicating the usage state of an object component and the attribute information of the wire electrical discharge machining apparatus from the wire electrical discharge machining apparatus, selects a group based on the attribute information, calls the reference maintenance data of the selected group from the management device, and diagnoses that maintenance is required when the usage state data reaches the reference maintenance data, acquires alarm data for alerting the user from the wire electrical discharge machining apparatus, and analyzes the improvement method based on the alarm data according to the data related to the usage method of the group having the same attribute information as that accumulated from the factory-completed wire electrical discharge machining apparatus.

[0010] Effect of the Invention

[0011] According to the present invention, it is possible to accurately determine the timing for maintenance such as component replacement of the wire electrical discharge machining apparatus, and it is possible to reduce the number of maintenance diagnoses and alarms. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic configuration diagram of a maintenance system for a wire electrical discharge machining apparatus according to Embodiment 1.

[0013] Figure 2 It is a flowchart of a diagnostic process executed by a maintenance diagnostic unit according to Embodiment 1.

[0014] Figure 3 It is a schematic configuration diagram of a maintenance system for a wire electrical discharge machining apparatus according to Embodiment 2.

[0015] Figure 4 It is a schematic configuration diagram of a maintenance system for a wire electrical discharge machining apparatus according to Embodiment 3.

[0016] Figure 5 It is an output example of an improvement method proposal unit according to Embodiment 3.

[0017] Figure 6 It is a flowchart showing an example of the order at the time of inspection of a wire electrical discharge machining apparatus according to Embodiment 4.

[0018] Figure 7 It is an example of a diagnostic result sent to a user in the inspection order of a wire electrical discharge machining apparatus according to Embodiment 4.

[0019] Figure 8 It is an explanatory diagram for explaining the operation of a machining apparatus for inspection of a wire electrical discharge machining apparatus according to Embodiment 4.

[0020] Figure 9 It is a flowchart showing an example of the order at the time of inspection of a wire electrical discharge machining apparatus according to Embodiment 4. DETAILED DESCRIPTION OF THE INVENTION

[0021] Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same reference numerals in the drawings denote the same or corresponding parts.

[0022] Embodiment 1.

[0023] Figure 1This is a schematic structural diagram showing the maintenance system 10 of a wire electrical discharge machining apparatus. The maintenance system 10 of the wire electrical discharge machining apparatus includes a wire electrical discharge machining apparatus 1, a management apparatus 5, and a maintenance diagnosis apparatus 6. The wire electrical discharge machining apparatus 1 includes a control unit 2 and a wire traveling unit 3. The wire traveling unit 3 includes a data acquisition unit 4 that acquires status data by detecting, for example, the speed of the wire using an encoder or by detecting the load status of the wire based on the machining current value flowing through the wire.

[0024] When the wire electrical discharge machining apparatus 1 is installed or when components are replaced, etc., the wire electrical discharge machining apparatus 1 is operated, and status data of components such as pulleys that are the objects of maintenance diagnosis are acquired by the data acquisition unit 4 and set as reference data. In addition, when the wire electrical discharge machining apparatus 1 is in use, status data is acquired from the data acquisition unit 4 and set as usage status data.

[0025] The management apparatus 5 is installed, for example, on a network, and acquires attribute information, reference data, and reference maintenance data in association with each other from a factory-completed wire electrical discharge machining apparatus different from the wire electrical discharge machining apparatus 1 that is the object of maintenance. The factory-completed wire electrical discharge machining apparatus (not shown) is a discharge machining apparatus having a factory-completed wire traveling system, and has the same structure as the wire electrical discharge machining apparatus 1. It may also be a device that has not been shipped but collects status data for management purposes, and these are collectively referred to here as factory-completed wire electrical discharge machining apparatuses.

[0026] Similar to the wire electrical discharge machining apparatus 1, the factory-completed wire electrical discharge machining apparatus acquires status data, for example, using an encoder, records the status data at the time of installation, etc. as reference data, records the status data when maintenance was required in the past for the factory-completed wire electrical discharge machining apparatus as reference maintenance data, and sends these data according to the request of the management apparatus 5.

[0027] Here, for example, in the wire traveling system, components such as pulleys that need to be replaced are reference components, the encoder data, etc. acquired at the time of installation, etc. of the factory-completed wire electrical discharge machining apparatus are reference data, and the encoder data, etc. acquired when maintenance was required in the past for the factory-completed wire electrical discharge machining apparatus are reference maintenance data.

[0028] The attribute information of the factory-completed wire electrical discharge machining apparatus is, for example, information indicating the model, the number of years of operation, the region, etc. For example, for a model with a long wire transfer path length, the wire automatic connection operation time becomes longer. For a model with a long full stroke distance, the full stroke movement time becomes longer. For a model with a large machining tank size, the liquid filling time becomes longer. For a model with a large machine body weight, there is a tendency for the load during axis movement to increase and the current value of the motor to increase. In addition, for a wire electrical discharge machining apparatus with a long number of years of operation, there is a tendency for consumable parts to be easily consumed. Also, when the wire electrical discharge machining apparatus is installed, for example, in a region with many earthquakes, there is a tendency for the grounding surface of the wire electrical discharge machining apparatus to be inclined, and there is a tendency for consumable parts to be easily consumed.

[0029] Therefore, if the status data is managed in groups based on this attribute information, the maintenance period can be estimated with higher accuracy. The management device 5 assigns groups such as group A1, group A2, group A3 based on the model as attribute information, group B1, group B2, group B3 based on the number of years of operation, group C1, group C2, group C3 based on the region, etc., and manages the status data in groups.

[0030] When there is one factory-completed wire electrical discharge machining apparatus, the group can be one. That is, the management device 5 manages the reference standard data and the reference maintenance data associated with the attribute information in groups for each attribute information. When there are multiple factory-completed wire electrical discharge machining apparatuses with the same attribute information, data obtained by performing statistical processing such as averaging on the reference standard data and the reference maintenance data can be used, or the most appropriate reference standard data and reference maintenance data can be selected from the conditions common to the wire electrical discharge machining apparatus 1 to be maintained. It is also possible to use the reference data of the target part instead of the reference standard data.

[0031] That is, the management device 5 determines the group based on the attribute information of the factory-completed wire electrical discharge machining apparatus, and manages the data in groups, and this attribute information is associated with reference maintenance data indicating a state where maintenance of the reference parts of the factory-completed wire electrical discharge machining apparatus is required.

[0032] The maintenance diagnosis device 6 includes: a maintenance diagnosis unit 7 that diagnoses the maintenance timing of the target components of the wire feed unit 3; and an output unit 8 that outputs the results diagnosed by the maintenance diagnosis unit 7. The maintenance diagnosis unit 7 obtains the attribute information of the wire electrical discharge machining device 1 from, for example, an attribute information sending unit 21 provided in a control unit 2 of the wire electrical discharge machining device 1. In addition, the maintenance diagnosis unit 7 obtains the state data of the wire feed unit 3 from a data acquisition unit 4 of the wire electrical discharge machining device 1. The maintenance diagnosis unit 7 acquires reference maintenance data associated with the same or approximate attribute information as the acquired attribute information from a management device 5. The maintenance diagnosis unit 7 diagnoses, for example, that the maintenance timing of the wire feed unit 3 is when the usage state data sent from the wire electrical discharge machining device 1 reaches the reference maintenance data.

[0033] That is, the maintenance diagnosis device 6 receives the attribute information of the wire electrical discharge machining device 1, selects a group of the management device 5 based on the attribute information, calls the reference maintenance data of the selected group from the management device 5, and diagnoses that maintenance is required when the usage state data received from the wire electrical discharge machining device 1 reaches the reference maintenance data.

[0034] The maintenance diagnosis device 6 can be within a maintenance company that performs maintenance operations, or can be provided adjacent to the wire electrical discharge machining device 1. In addition, this function can also be provided within the wire electrical discharge machining device 1. That is, it can be used by maintenance diagnosis personnel for diagnosis, and also by users of the wire electrical discharge machining device 1 for diagnosis. The management device 5 and the maintenance diagnosis device 6 can be provided at locations different from the wire electrical discharge machining device 1.

[0035] Figure 2 It is a flowchart showing the diagnostic process executed by the maintenance diagnosis unit 7. First, the maintenance diagnosis unit 7, for example, when installing the wire electrical discharge machining device 1, operates the wire electrical discharge machining device 1 to obtain reference data (step S20). Next, it obtains the attribute information of the wire electrical discharge machining device 1 from the attribute information sending unit 21 (step S21). Next, the maintenance diagnosis unit 7 determines whether to perform a diagnosis based on the information input to the maintenance diagnosis unit 7 (step S22). The wire electrical discharge machining device 1 can be operated in cases such as regular inspections when maintenance diagnosis personnel wish to perform a diagnosis, causing the maintenance diagnosis unit 7 to start the diagnosis, or it can be diagnosed continuously after installation.

[0036] When diagnosis is not required in step S22, it returns to step S22 (step S22 No).

[0037] In the case where diagnosis is required in step S22, the maintenance diagnosis unit 7 acquires usage status data from the data acquisition unit 4 (step S23). Next, the maintenance diagnosis unit 7 selects one of the groups of the management device 5 based on the acquired attribute information (step S24). Next, the maintenance diagnosis unit 7 acquires the reference maintenance data of the selected group (step S25). The reference maintenance data is data that varies for each attribute information.

[0038] The maintenance diagnosis unit 7 determines whether the usage status data has reached the acquired reference maintenance data (step S26). If it has reached, it diagnoses that maintenance is required and outputs the result to the output unit (step S27). On the other hand, if the usage status data has not reached the reference maintenance data (step S26 No), it returns to step S23.

[0039] The order and timing of acquiring the reference data, attribute information, and usage status data are not limited to Figure 2 the described process. For example, the reference data and usage status data may be acquired in step S20.

[0040] As described above, according to the present embodiment, based on the attribute information of the wire electrical discharge machining apparatus 1, maintenance diagnosis is performed using the reference maintenance data of the factory-completed wire machining apparatuses having the same attribute information that require the same maintenance. Therefore, maintenance is not performed frequently beyond what is necessary, the machining quality is not reduced beyond the maintenance period, and an appropriate maintenance period can be detected. Thus, highly accurate maintenance diagnosis can be performed.

[0041] In addition, in step S25, when there are multiple pieces of reference maintenance data for each attribute information, the reference maintenance data associated with the reference reference data approximated to the reference data acquired in step S20 through Figure 2 can be acquired from the group of the same attribute information. In this way, the reference maintenance data having characteristics closer to those of the wire electrical discharge machining apparatus 1 to be diagnosed among the same attribute information can be set as the determination value, and thus the accuracy of the maintenance diagnosis can be improved.

[0042] In addition, in the present embodiment, the components constituting the wire traveling unit 3 such as the pulley are set as the target components, but other components can also be set as the target components. In this case, the data acquisition unit 4 may be provided at a position where the status data of the target component can be acquired. Similarly, the accuracy of the maintenance diagnosis of the target component can be improved.

[0043] Embodiment 2.

[0044] Figure 3 is a schematic structural diagram of the maintenance system of the wire electrical discharge machining apparatus according to Embodiment 2. Description is omitted for parts identical to those in Embodiment 1.

[0045] Based on Figure 3 , the maintenance system of the wire electrical discharge machining apparatus according to Embodiment 2 will be described. In Embodiment 1, an example in which the maintenance diagnosis unit 7 acquires the state data acquired from the data acquisition unit 4 of the wire electrical discharge machining apparatus 1 is shown. However, in Embodiment 2, the difference is that the control unit 2 in the wire electrical discharge machining apparatus 1 has an analysis unit 22 and a storage unit 23, and the state data analyzed by the analysis unit 22 is used as reference data or state data. Other than this, it is the same as Embodiment 1.

[0046] In the present embodiment, regarding the state data acquired by the data acquisition unit 4, for example, it is analyzed by the analysis unit 22 in the control unit 2, and the analyzed data is sent to the maintenance diagnosis unit 7 as state data for use. If the structure is as described above, even when the state data acquired by the data acquisition unit 4 cannot be directly used, the diagnosis in the maintenance diagnosis unit 7 can be performed. The analysis unit 22 can be provided in the maintenance diagnosis device 6. If the analysis unit 22 is provided in the wire electrical discharge machining apparatus 1, an increase in the processing load of the maintenance diagnosis device 6 can be prevented, and the diagnosis can be performed efficiently.

[0047] If described in further detail, in the wire electrical discharge machining apparatus 1, the state data acquired by the data acquisition unit 4 of the wire travel unit 3 is stored in the storage unit 23. This is particularly effective when the state data acquired by the data acquisition unit 4 cannot be directly used by the maintenance diagnosis unit 7. When the wire electrical discharge machining apparatus 1 is installed, the wire electrical discharge machining apparatus 1 is operated, the state data acquired by the data acquisition unit 4 is stored in the storage unit 23, and the state data stored in the storage unit 23 is analyzed by the analysis unit 22 to be used as reference data. Similarly, when in use, the state data acquired by the data acquisition unit 4 is stored in the storage unit, and the state data stored in the storage unit 23 is analyzed by the analysis unit 22 to be used as state data for use.

[0048] The analysis unit 22 acquires a plurality of state data stored in the storage unit 23, and calculates, for example, the average value to be used as reference data or state data for use. For example, according to the model, when different physical quantities are acquired as state data, in order to unify the physical quantities, conversion processing can be performed. For example, the voltage value can be converted to the current value for use.

[0049] The state data analyzed by the analysis unit 22 of the control unit 2 is sent to the maintenance diagnosis device 6 as reference data or state data for use.

[0050] The maximum value or minimum value of the state data can be calculated to be used as reference data or state data for use.

[0051] The maintenance diagnosis unit 7 acquires, for example, the attribute information and the usage status data from the attribute information transmission unit 21 of the control unit 2. The processing sequence of the maintenance diagnosis unit 7 is the same as that of the first embodiment.

[0052] As described above, according to the present embodiment, similar to the first embodiment, maintenance diagnosis is performed using the reference maintenance data of the factory-completed wire electrical discharge machining apparatus having the same attribute information, and thus highly accurate maintenance diagnosis can be performed. Further, by the analysis unit 22 in the wire electrical discharge machining apparatus 1, statistical processing such as average value calculation and transformation into desired data are performed, and thus fluctuations in the status data can be reduced. In particular, in the case where preprocessing is required, an increase in the processing load of the maintenance diagnosis apparatus 6 can be suppressed.

[0053] Embodiment 3.

[0054] In Embodiment 3, a maintenance system for a wire electrical discharge machining apparatus that, on the basis of maintenance diagnosis using usage status data, presents points for attention and improvement cases related to the usage method of the wire electrical discharge machining apparatus 1 according to the alarm data of the wire electrical discharge machining apparatus 1 will be described.

[0055] Figure 4 is a schematic configuration diagram showing the maintenance system of the wire electrical discharge machining apparatus according to Embodiment 3. Compared with Figure 1 the maintenance system of the wire electrical discharge machining apparatus according to the first embodiment shown, the difference lies in that it has an alarm data acquisition unit 24, an improvement method analysis unit 25, and an improvement method proposal unit 26. The others are the same as those in the first embodiment.

[0056] In the control unit 2 of the wire electrical discharge machining apparatus 1, for example, there is an alarm data acquisition unit 24 that acquires, for example, alarm data such as the contact of the nozzle with the workpiece to draw the user's attention.

[0057] Based on the alarm data acquired from the alarm data acquisition unit 24, the improvement method analysis unit 25 analyzes improvement methods related to the usage method of the wire electrical discharge machining apparatus 1. The analysis of the improvement method for the alarm can be performed, for example, from a group having the same attribute information accumulated from the factory-completed wire electrical discharge machining apparatus. For example, in the case where reference data indicating that the number of alarms can be reduced by switching to the low-speed mode near the workpiece can be acquired, it can be set as an improvement method.

[0058] The improvement method analysis unit 25 sends the improvement method extracted from the alarm data to the improvement method proposal unit 26. The improvement method proposal unit 26 outputs the acquired improvement method. Figure 5 is an output example of the improvement method proposal unit 26 according to Embodiment 3. As a diagnosis result report, it is displayed as "The nozzle contact alarm has occurred ○○ times since the previous inspection. By switching to the low-speed mode near the workpiece, the alarm can be reduced."

[0059] As described above, according to the present embodiment, similar to Embodiments 1 and 2, maintenance diagnosis is performed using reference maintenance data of a factory-completed wire processing device having the same attribute information. Therefore, on the basis of enabling highly accurate maintenance diagnosis, improvement methods related to the usage method of the wire electrical discharge machining device 1 can be proposed to the user based on the alarm data of the wire electrical discharge machining device 1.

[0060] In addition, in the present embodiment, the alarm data obtained for analyzing the improvement method by the improvement method analysis unit 25 may be all or a part of the alarm data obtained by the alarm data acquisition unit 24.

[0061] Embodiment 4.

[0062] In Embodiments 1 to 3, an example has been described in which status data is acquired when the user uses the electrical discharge machining device 1, and these status data are sent as usage status data to the maintenance diagnosis device 6 for maintenance diagnosis. However, in Embodiment 4, an example in the case where a maintenance diagnostician who performs maintenance diagnosis uses the maintenance diagnosis device 6 for maintenance diagnosis will be described.

[0063] The maintenance system 10 of the wire electrical discharge machining device in the present embodiment has the same structure as that of Embodiment 1, and the maintenance diagnosis device 6 and the management device 5 are owned by the maintenance diagnostician.

[0064] Figure 6 FIG. is a flowchart showing an example of the procedure during the inspection of the wire electrical discharge machining device according to Embodiment 4. For example, if a regular inspection starts, first, the user uses the wire electrical discharge machining device 1. The data acquisition unit 4 acquires status data, and the data acquisition unit 4 sends the status data to the maintenance diagnosis unit 6 (step S20). Next, the user entrusts the diagnosis to the maintenance diagnostician (step S21). The maintenance diagnostician operates the maintenance diagnosis device 6 to perform maintenance diagnosis (step S22), and sends the result to the user (step S23). The maintenance diagnostician explains the diagnosis result to the user (step S24), and the regular inspection ends.

[0065] Figure 7 FIG. is an example of the diagnosis result sent to the user in the inspection procedure of the wire electrical discharge machining device according to Embodiment 4. In one example of the diagnosis result report, "unit", "problem location and countermeasure" for the unit, and "judgment" are recorded in a table form. For example, "judgment" is graded A to C according to the necessity of the countermeasure. In Figure 7 the example, A is normal, B is in need of countermeasure, and C is in need of maintenance.

[0066] In addition, in the case where the diagnostic result report shows that the "unit" is the "wire feeding system", the "problem area and countermeasure" is "normal" and the "judgment" is "A". In the case where the "unit" is the "automatic wiring device", the "problem area and countermeasure" is shown as "Please clean the energized components" and the "judgment" is "B". In addition, in the case where the "unit" is the "recovery unit", the "problem area and countermeasure" is shown as "Please replace the recovery roller" and the "judgment" is "C". In the case where the "unit" is the "tank", the "problem area and countermeasure" is "normal" and the "judgment" is "A". In the case where the "unit" is the "liquid system", the "problem area and countermeasure" is shown as "Please clean the float switch" and the "judgment" is "B".

[0067] Normally, users only own the wire electrical discharge machining device 1, so it is difficult to obtain the data of the wire electrical discharge machining device completed at the factory. Therefore, for example, if it is the manufacturer of the wire electrical discharge machining device 1 itself or a person who has signed a contract with the manufacturer, i.e., the maintenance diagnostician, it is easy to collect the data of the wire electrical discharge machining device completed at the factory. Therefore, according to the present embodiment, as in Embodiments 1 to 3, the reference maintenance data of the wire machining device completed at the factory with the same attribute information is used for maintenance diagnosis. Therefore, on the basis of being able to perform high-precision maintenance diagnosis, a lot of data of the wire electrical discharge machining device completed at the factory can be used, and thus maintenance diagnosis can be performed with higher precision.

[0068] In addition, in this Embodiment 4, an example of sending the status data obtained by the data acquisition unit 4 to the maintenance diagnosis device 6 has been described, but it can also be sent to the maintenance diagnosis device 6 via the control unit 2.

[0069] In addition, the status data can be obtained when the user of the wire electrical discharge machining device 1 operates the device, or can be obtained by the maintenance diagnostician executing the machining device operation program for inspection. Since users each have their own unique usage methods, by executing the machining device operation program for inspection, the status of the wire electrical discharge machining device 1 can be diagnosed more accurately.

[0070] During the inspection, for example, as Figure 8 shown, the wire insertion device 17 can be moved in the X-axis and Y-axis full strokes from the origin in the machining tank 18, and the current load rate data of the drive motor can be obtained at each axis position. At this time, for example, the status data at the time of installation is used as the reference data, and the difference a from the status data at the time of inspection is obtained. And if the maintenance diagnosis device 6 compares the reference maintenance data obtained from the management device 5 with the difference a at the time of inspection based on the attribute information of the wire electrical discharge machining device 1 to be inspected, maintenance diagnosis can be performed.

[0071] Figure 9This is a flowchart showing the sequence in regular inspections when maintenance diagnosticians use the operation program of the processing device for inspection. Compared with the sequence example of Figure 6 , steps S26 and S27 are different, while the other steps are the same. For the steps that are the same as those in Figure 6 , the same reference numerals as those in Figure 6 are marked.

[0072] If the inspection starts, for example, the maintenance diagnostician remotely operates the wire electrical discharge machining device 1 using the operation program of the processing device for inspection (step S26). Next, the data acquisition unit 4 sends status data to the maintenance diagnosis unit 5 (step S27). The processing of steps S22 to S25 after step S27 is the same as the processing with the same reference numerals in Figure 6 , so the description is omitted.

[0073] It is also possible for the user to execute the operation program of the processing device for inspection and contact the maintenance diagnostician. In short, by executing the operation program of the processing device for inspection to conduct the inspection, the state of the wire electrical discharge machining device 1 can be diagnosed more accurately.

[0074] The structure shown in the above embodiments represents an example of the content of the present invention, and it can also be combined with other known technologies. Without departing from the gist of the present invention, a part of the structure of the combination of the above embodiments can also be omitted or changed.

[0075] Description of reference numerals

[0076] 1 Wire electrical discharge machining device, 2 Control unit, 3 Wire feed unit, 4 Data acquisition unit, 5 Management device, 6 Maintenance diagnosis device, 7 Maintenance diagnosis unit, 8 Output unit, 10 Maintenance system, 21 Attribute information sending unit, 22 Analysis unit, 23 Storage unit, 24 Alarm data acquisition unit, 25 Improvement method analysis unit, 26 Improvement method proposal unit.

Claims

1. A maintenance system for a wire electrical discharge machining device, characterized in that: It has: A management device that manages reference maintenance data indicating the state of maintenance required for reference components of the factory-completed wire electrical discharge machining device according to groups determined based on the attribute information of the factory-completed wire electrical discharge machining device, and accumulates data related to the usage method of the factory-completed wire electrical discharge machining device according to the groups; A wire electrical discharge machining device having an alarm data acquisition unit that sends reference data indicating the reference state of the target component and usage state data indicating the usage state, and acquires alarm data for alerting the user; And A maintenance diagnosis device that receives the attribute information of the wire electrical discharge machining device, selects the group based on the attribute information, calls the reference maintenance data of the selected group from the management device, and diagnoses that maintenance is required when the usage state data received from the wire electrical discharge machining device reaches the reference maintenance data, and when the alarm data is acquired from the wire electrical discharge machining device, calls the data of the factory-completed wire electrical discharge machining device accumulated in the group selected based on the attribute information from the management device, The wire electrical discharge machining device analyzes the improvement method based on the data of the group accumulated from the factory-completed wire electrical discharge machining device received from the maintenance diagnosis device, and outputs the analyzed improvement method as an improvement proposal.

2. The maintenance system for a wire electrical discharge machining device according to claim 1, characterized in that: The attribute information is at least any one of model information, number of operating years, and information corresponding to the earthquake incidence rate.

3. The maintenance system for a wire electrical discharge machining device according to claim 2, characterized in that: The model information is at least any one of the length of the wire feeding path, the full stroke distance, the size of the machining tank, or the machine body weight.

4. A wire electrical discharge machining device, characterized in that: It has: A data acquisition unit that acquires reference data indicating the reference state of the target component and usage state data indicating the usage state, and sends them to the maintenance diagnosis device; An attribute information sending unit that sends attribute information; An alarm data acquisition unit that acquires alarm data for alerting the user; An improvement method analysis unit that analyzes the improvement method based on the alarm data; And An improvement method proposal unit that outputs the improvement method as an improvement proposal, It is diagnosed that maintenance is required when the usage state data reaches the reference maintenance data indicating the state of maintenance required for the reference components of the factory-completed wire electrical discharge machining device managed according to the group determined based on the attribute information, and the improvement method is analyzed by the improvement method analysis unit according to the data related to the usage method of the group having the same attribute information accumulated from the factory-completed wire electrical discharge machining device.

5. A maintenance diagnosis device, characterized in that: Receiving usage status data indicating the usage status of an object component and attribute information of a wire electrical discharge machining device from the wire electrical discharge machining device, selecting a group based on the attribute information, calling reference maintenance data indicating a status that requires maintenance of the factory-completed wire electrical discharge machining device of the selected group, and diagnosing that maintenance is required when the usage status data reaches the reference maintenance data, obtaining alarm data for alerting the user from the wire electrical discharge machining device, and analyzing an improvement method based on the alarm data according to data related to the usage method of the group having the same attribute information accumulated from the factory-completed wire electrical discharge machining device.

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