JPH05200628A - Wire electrode automatic feeder - Google Patents

Abstract

(57) [Summary] [Purpose] The cause of retry occurrence during automatic supply of wire electrodes is identified as an accidental cause and other causes, and the retry occurrence position is detected based on a cause other than the accidental cause. [Structure] A detection unit 26 that detects the feed length of the wire electrode 2 when a retry occurs, a table 27 that stores the length data, a processing unit 33 that searches and compares past length data data, and a data unit The processing means 34 for determining the dispersion state is provided, and in the case of the concentrated distribution, it is determined that the retries are caused by the same cause instead of the accidental cause, and the retry occurrence position is displayed on the display device 14. ..

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire electrode automatic supply device for a wire electric discharge machine, and more particularly to a technique relating to a retry operation during automatic supply of wire electrodes. Here, “retry” means that when the wire electrode is automatically supplied before the start of the wire electric discharge machining or when the wire electrode is broken during machining, when the wire electrode cannot be normally supplied due to a supply failure for some reason,
It is an operation to perform automatic supply again.

[0002]

2. Description of the Related Art FIG. 8 is a schematic view of a conventional wire electrode automatic feeder, in which 1 is a workpiece to be machined by a wire electric discharge machine and 2 is a wire for machining the workpiece 1. Electrodes, 3 is an upper pulley, 4 is an upper feed roller for feeding the wire electrode 2, 5 is an upper feed motor which is connected to the upper feed roller 4 and obtains a driving force for feeding the wire electrode 2, 6 is the wire electrode 2 A jet nozzle or an upper nozzle for creating a water column that regulates the vertical guidance of the nozzle, 7 is a working liquid supplied to the jet nozzle 6, 8 is a water column formed by the jet nozzle 6 and the working liquid 7, and 9 is a wire electrode 2 Upper die or upper guide for supporting the wire electrode 2 on the lower side, 10 a lower die or lower guide for supporting the wire electrode 2 on the lower side, 11 a lower nozzle for receiving the water column 8, 12
Is a retry detection mechanism that detects and analyzes the motor load current of the upper feed motor 5 and determines that it is impossible to feed the wire electrode 2 because some insertion failure has occurred when the load current increases. A wire cutting / excluding mechanism for cutting and collecting the wire electrode 2 sent out when it occurs, 14 is a display device for displaying the state of the machine to the operator, 15 is a signal from the retry detection mechanism 12, and the like, It is a numerical controller that controls the entire wire electrode automatic supply device by giving a command to the upper feed motor 5, the wire cutting elimination mechanism 13 and the like to realize an automatic wire electrode insertion operation.

FIG. 9 is a flow chart showing the process of the wire electrode automatic supply device, 16 is a process for injecting the working liquid 7 into the jet nozzle 6 to generate a water column 8, and 17 is a signal for the upper feed motor 5 to feed the upper feed Processing for rotating the roller 4, 18
Is a retry determination process in which the load current of the upper feed motor 5 is detected, and when it is determined that there is a load, a retry determination process is performed, and 19 is determined whether the wire electrode 2 is stretched to the final end, and the final end is determined. When the wire electrode 2 is stretched, the determination process of shifting to the completion operation is performed, 20 is the process of cutting off the supply of the machining fluid 7 and stopping the upper feed motor 5 when the wire electrode 2 is stretched to the final end, and 21 is the retry operation. Processing for stopping the machining fluid 7 and the upper feed motor 5 before the start, 22 is processing for causing the wire cutting and removing mechanism 13 to cut the wire electrode 2 and discharging the cut wire electrode, and 23 is for counting the number of retries until now. , If the predetermined number of times has been performed, the process proceeds to error processing, and if not, the process proceeds to execute the wire electrode automatic supply operation again, 24 sets an error It is a process to stop the ear electrode automatic supply operation.

In FIG. 10, sludge or the like adheres to the lower die 10 during the automatic wire electrode insertion operation, and even if the wire electrode 2 tries to pass through the lower die 10, it cannot pass therethrough. FIG. 7 is an explanatory diagram illustrating a state where the load current of the upper feed motor 5 is increased and the transition to the retry operation is started, protruding from the above.

FIG. 11 is an explanatory view for explaining a state in which the wire electrode 2 is caught by the upper die 9 during the automatic wire electrode inserting operation, the load current of the upper feed motor 5 increases, and the transition to the retry operation is started.

Next, the operation will be described with reference to FIGS. As shown in FIG. 8, the wire electrode automatic supply device is controlled by the numerical controller 15, and operates according to the flow of processing shown in FIG. When the automatic supply operation of the wire electrode 2 is started, first, the process 16 of FIG. 9 is executed, the working liquid 7 is supplied to the jet nozzle 6, and the water column 8 is formed toward the lower nozzle 11. Next, in step 17, a voltage is applied to the upper feed motor 5, and the upper feed roller 4 feeds the wire electrode 2 into the water column 8.
After passing through the upper die 9, the wire electrode 2 is guided while being restricted in its traveling direction by the water column 8 and is delivered to the lower die 10 in the lower nozzle 11. After that, the wire electrode 2 is fed to the final end, and when it is judged to be completed by the processing 19, the processing liquid 7 and the upper feed motor 5 are stopped by the processing 20, and the automatic supply operation of the wire electrode is completed. The state of the upper feed motor 5 is constantly monitored by the upper feed motor load current detection mechanism 12 until it passes through the lower die 10.

[0007] Now, sludge and dust,
When the wire automatic supply operation is performed when dust or the like is attached, the wire electrode 2 is normally sent out up to the lower die 10, but when it reaches the lower die 10, the wire electrode 2 cannot pass therethrough and the water column 8 Figure 10
It will be in a state like. If the upper feed is continued, the destination of the feed does not move, and the motor load current of the upper feed motor 5 starts to increase. When the motor load current increases, the load current detection mechanism 12 inputs a signal as a retry signal to the numerical controller 15. When the retry signal is input, the process 18 starts shifting to the retry process. Further, even when the wire electrode 2 cannot pass through the upper die 9 as shown in FIG. 11, the wire electrode is similarly fed out, so that the motor load current of the upper feed motor 5 increases and the retry operation is started. In the retry operation, the processing liquid 7 and the upper feed motor 5 are first stopped by the process 21. Next, in process 22, a cutting command and a recovery command for the wire electrode 2 are sent to the wire cutting and removing mechanism 13. When the cutting command is output, the wire cutting elimination mechanism 13
Thus, the cutting operation of the wire electrode 2 and the collecting operation of the remaining portion of the cut wire electrode 2 are performed. When the cutting and collecting are finished, the wire electrode 2 is in the same state as before the automatic supply operation is started. Next, the number of retries is determined by the process 23, and when the number of retries is less than the predetermined number, the process moves to the process 16 and the wire electrode automatic supply operation is started from the beginning. If the number of retries is equal to or greater than the predetermined number, it is internally determined that the automatic supply operation cannot be continued, and the process 24 is performed. In process 24, the fact that the wire electrode automatic supply operation has not succeeded is displayed as an error message on the display device 14 of FIG. If the wire electrode automatic supply device is stopped due to an error, the wire electrode automatic supply device is stopped in the same state as before the automatic supply operation was started.

[0008]

Since the conventional wire electrode automatic supply device is configured as described above, when the retry error occurs and the wire electrode automatic supply device stops, the cause thereof is confirmed. Was difficult. In other words, it was impossible to determine whether the cause of the retry occurred accidentally or when it should occur, and it was also impossible to identify at which position the supply failure occurred. Therefore, there has been a problem that all parts of the wire electrode automatic supply device must be cleaned and readjusted. In the case of a wire electrode automatic feeder having many cleaning and adjustment points, this takes time, which lowers the operating rate for a wire electric discharge machine that efficiently performs continuous unmanned automatic machining. Since it requires maintenance such as overall cleaning and adjustment, it was a cause of lowering work efficiency.

The present invention has been made to solve the above problems. First, the cause of the retry is analyzed and confirmed, and if it is based on a cause other than the accidental cause, the cause of the wire electrode An object of the present invention is to obtain a wire electrode automatic supply device capable of accurately detecting the position on the supply path where a supply failure has occurred. Another object of the present invention is to clearly inform an operator of a place to be inspected where a supply failure of wire electrodes frequently occurs. Still another object of the present invention is to support the next wire electrode automatic supply operation by providing cleaning means for eliminating the cause of wire electrode supply failure, and to increase the success probability of the wire electrode automatic supply operation. ..

[0010]

In the present invention, first,
It is possible to estimate with high probability that the retry is caused by a cause other than the accidental cause, and the retry position based on that cause, that is, the fault position on the supply route of the wire electrode, is detected. The automatic feeder is configured as follows. That is, a machining liquid jetting means for jetting the machining fluid in a column shape from the upper nozzle toward the lower nozzle, a wire feeding means for feeding a wire electrode into the jetted liquid column, and a load applied to a motor of the wire feeding means A load detecting means for detecting, a retry judging means for judging whether the wire electrode cannot be fed depending on the presence or absence of a load of the load detecting means, and a retry operation when it is judged that the wire electrode cannot be fed. Before executing, the wire feed length detecting means for detecting the length of the sent wire electrode, the wire cutting excluding means for cutting and discharging the sent wire electrode, and the wire feed length detected by the wire feed length detecting means The length data storage means for accumulating the length and the wire feed length at the time of a retry by the wire feed length detection means are stored in the length data storage means in the past. Comparison means for searching among the length data comparison, to determine the state of dispersion of the data from the comparison result of the length data,
When the determination result is a concentrated distribution, it has a data analysis determination means for setting the retry occurrence position that occurs intensively.

Next, in order to inform the operator of the trouble position, that is, the position to be inspected, the automatic wire electrode supply apparatus according to the present invention displays the retry occurrence position specified by the data analysis judgment means on the display device. It is something to display.

According to another aspect of the present invention, the wire feeding means can be configured to automatically guide and insert the wire electrode from the upper guide into the lower guide, and when the retry occurs, the fed wire electrode is removed. The reinsertion can be repeated without cutting and discharging.

Next, in order to remove the cause of the wire electrode supply failure, cleaning means is additionally provided for cleaning each part on the wire electrode supply path, and the data analysis and determination means is specified by the cleaning means. Clean the retry location.

According to another aspect of the present invention, the retry occurrence position can be determined by the wire feed length detected by the wire feed length detecting means, and the cleaning means can be operated and supplied at an early opportunity. Allows for early removal of the cause of failure.

A cleaning mode defined by the cleaning time and cleaning method can be set for the cleaning means.
Further, this cleaning mode can be set different from the previous one by analyzing the accumulated length data and the current feed length.

[0016]

Each time a retry occurs, the feed length of the wire electrode is detected and the length is stored. The distributed state of the data can be found by searching the length data accumulated in the past for the wire feed length detected when the retry occurs and comparing it. As a result, if it is found that the concentration distribution is found, it is sufficiently estimated that the cause of the wire electrode supply failure is not an accidental one but the result of sludge, dust, or dust adhering to the location. be able to.
In this way, the location to be inspected is identified, and by displaying the location to be inspected on the display device, it becomes possible to give an accurate instruction to the operator. Once the location to be inspected is found, the cleaning means corresponding to that location can be activated to partially concentrate the cleaning, remove sludge, etc., support the next retry, and The success rate of the automatic electrode supply operation increases. Also, the cleaning mode of the cleaning means differs from the previous one depending on the occurrence status of retry,
For example, if the previous time is the intermittent mode, the continuous mode can be selected this time, or the opposite can be selected, thereby further improving the reliability. Moreover, it is not necessary to extend the cleaning time longer than necessary.

[0017]

Embodiments of the present invention will be specifically described below with reference to the drawings. Example 1. 1 is a schematic diagram of a wire electrode automatic supply device according to a first embodiment of the present invention. In the figure, 25 is an encoder unit connected to the upper pulley 3 for detecting the rotation speed of the upper pulley 3, and 26 is an encoder unit 25. A wire feed length detection unit for detecting the length of the wire electrode 2 fed by the upper feed motor 5 based on the rotation speed detected by
Reference numeral 7 is a storage table for storing the length of the wire electrode 2 when a retry occurs, which is detected by the wire feed length detection unit 26. The workpiece 1 to the numerical controller 15 are the same as the conventional one shown in FIG.

FIG. 2 is a flow chart showing the internal processing of the apparatus of the first embodiment. 28 is a table for storing the feed length of the wire electrode 2 in the retry length storage table 27 when a retry occurs and a retry counter on the display device 14. The wire electrode 2
And 29, a process of determining and updating the wire electrode 2 when the retry occurs and comparing the length of the wire electrode 2 stored in the storage table 27 with the wire electrode 2 when a retry occurs, and 29 Determination process, 30 is a process of branching based on the result determined by the process 29, 31 is a process 29
This is a process of displaying the inspection location of the wire electrode automatic supply device on the display device 14 based on the result analyzed inside. The process 16 for turning on the jet to the process 22 for issuing a cutting recovery command to the wire cutting and removing mechanism 13 and the process 24 for stopping the supply operation due to an error are the same as those in the conventional example shown in FIG.

FIG. 3 is a detailed process flow chart of the process 29 of FIG. 2, in which the feed length of the wire electrode 2 at the time point when load is detected in the process 18 is stored in the retry length storage table 27. A process of searching from the retry length data, 33 is a process of determining whether or not the matched length data of the wire electrode 2 can be found in the process 32, and if there is no matching data, the process proceeds to the retry determination process.
Reference numeral 34 is a process of determining whether or not there is a plurality of length data in the vicinity of the length data when the matching length data is found. If there is no such length data, the process proceeds to the retry determination process. 35 indicates the variation in the feed length of the wire electrode 2 when the retry occurs (according to the determination result of the process 34),
A process of setting which part of the wire electrode automatic supply device should be adjusted and cleaned, 36 is a process of setting not to retry the process 30, and 37 is a process of retrying the process 30. Is a process to instruct. The determination processing 23 for determining whether to perform the retry operation by comparing with the command count is the same as the conventional example in FIG.

FIG. 4 is a view showing the supply status of the wire electrode automatic supply device displayed on the screen 38 of the display device 14. On the screen 38, a schematic view of the wire electrode automatic supply device and a wire supply route are shown. The display of each part and the "retry number" already executed at those parts are displayed. Further, the "x" mark 39 in the figure represents a portion to be inspected.

Next, the operation will be described with reference to FIGS. 1 to 4. When a wire electrode automatic supply operation is instructed to the wire electrode automatic supply device configured as shown in FIG. 1, first, the machining liquid 7 is supplied to the jet nozzle 6 toward the lower nozzle 11 as in the prior art. A water column 8 is formed.
Then, a voltage is applied to the upper feed motor 5, the upper feed roller 4 rotates, and the wire electrode 2 is fed into the water column 8. When the wire electrode 2 is sent out, the upper pulley 3 also rotates, and the encoder section 25 connected to the upper pulley 3
A signal is input to. The input signal is converted into a wire feed length by the detection unit 26, and the converted length is input to the numerical controller 15. All of the wire electrode automatic supply operations are controlled by the numerical controller 15, and when a retry occurs, the wire feed length of the wire electrode 2 input from the wire feed length detector 26 is stored in the storage table 27.

The process flow of the wire electrode automatic supply operation will be described with reference to FIGS. 2 and 3. The water column 8 is formed by the process 16 as in the prior art, and then the feed of the wire electrode 2 is started by the process 17. It When the wire electrode 2 passes through the upper die 9 and the lower die 10 and is fed to the final end, the completion judgment is made in the processing 19, and the processing 2
When 0, the machining fluid 7 and the upper feed motor 5 are stopped, and the inserting operation is completed. While the wire electrode 2 is being sent to the lower nozzle 11, the upper feed motor load current is constantly detected by the detection unit 12, and when the wire electrode is caught by the lower die 10 or the upper die 9 as shown in FIGS. A signal is input from the load current detector 12 to the numerical controller 15. The input signal is monitored by the process 18, and when it is judged that there is a load, the control shifts to the process 21. Next, in process 21, the machining fluid 7 and the upper feed motor 5 are stopped. Next, in process 28, the feed length of the wire electrode 2 at the time when the load is detected is input from the detection unit 26 and stored in the storage table 27. Further, the "retry count" shown in FIG. 4 is determined and updated by the detected feed length of the wire electrode 2. Then, in process 22, the wire cutting and removing mechanism 13 is instructed to cut the wire electrode 2 and to collect the cut dust of the wire electrode 2. The state of the wire electrode automatic supply device after being cut and collected by the wire cutting and removing mechanism 13 is returned to the completely same initial state as before the supply operation. The post-processing 29 that is returned to the initial state is executed,
The process of determining whether or not to shift to retry is performed, and process 3
The determination operation is performed with 0. When shifting to retry, the supply operation is sequentially started from the beginning in process 16. When the retry operation is stopped, the stop is instructed by the process 24, and the process 31 indicates the "inspection" point and the position to be inspected by the "x" mark 39 on the schematic view of the wire electrode automatic feeder, as shown in FIG. It is displayed on the display device 14.

The inside of the process 29 is controlled by the process flow chart shown in FIG. First, in the process 32, it is searched whether or not the feed length of the wire electrode 2 stored now is the same as the length data stored previously. Next, when the same data does not exist in the process 33, the process shifts to the determination process of the process 23. In the process 23, the number of retries is determined in the same manner as in the conventional case. If the number of retries exceeds the designated number, the process is transferred to the process 36. An error is set in the process 36, and the process proceeds to the error process by the process 30 of FIG. In process 37, a retry command is set and process 3
When 0, the operation shifts to the retry operation. Next, when the same data is retrieved by the process 33, the process moves to the process 34, and the process 3
In step 4, the distribution state of the data stored in the past is determined. If the feed length at the time the retry occurs due to this determination processing 34 is concentrated on a specific length, processing 35
Transfer control to. If not concentrated, the control is transferred to the process 23, and it is determined whether or not to shift to the retry. In process 35, which part of the wire electrode automatic feeder is to be inspected is set based on the concentrated feed length. The set inspection location is displayed on the display device 14 as shown in FIG. 4 by the processing 31 of FIG.

By performing the above processing, when retries occur a plurality of times during the wire electrode automatic supply operation, when the occurrence points are concentrated near the same point on the wire electrode supply path, the retries are performed. It is possible to fully presume that the occurrence is due to the same cause and not due to an accidental cause. It is possible to perform cleaning and adjustment on the damaged part and perform the wire electrode automatic supply operation again.Compared with the conventional method, the recovery work is completed in a much shorter time, improving work efficiency and improving operation efficiency. Can be made

Example 2. FIG. 5 is a schematic diagram of a second embodiment of the present invention. In the figure, 41 is a cleaning nozzle for cleaning the upper die 9 part, 42 is a cleaning nozzle for cleaning the nozzle part of the upper nozzle 6, 43 is the lower die 1.
A cleaning nozzle for cleaning the 0 part, 44 is an upper die cleaning nozzle 41, in response to a command from the numerical controller 15.
Upper nozzle cleaning nozzle 42, lower die cleaning nozzle 43
It is a cleaning mechanism that ejects a cleaning liquid (including a processing liquid) onto each of them to remove the attached sludge, dust, and dust. The other components are the same as those in FIG.

FIG. 6 is a flow chart showing the internal processing of the second embodiment. Reference numeral 45 is a processing for storing the feed length of the wire electrode 2 when a retry occurs in the retry length storage table 27, and 46 is a wire electrode when a retry occurs. The comparison of the feed length of No. 2 and the length data stored in the storage table 27, the cleaning time selection process for automatically setting the cleaning time length or the intermittent injection interval, 47 is the retry length A process of analyzing the data in the storage table 27 to select which part of the upper die 9, the upper nozzle 6, and the lower die 10 to be washed, 48 is a process of instructing the upper nozzle 6 to be washed, 4
9 is a process for instructing the upper die 9 to be cleaned, and 50 is a process for instructing the lower die 10 to be cleaned. The other components are the same as those in FIG.

FIG. 7 is a process flow chart showing the details of the process 46 of FIG. 6, and 51 shows the feed length of the wire electrode 2 at the time when the presence of load is detected by the process 18 is stored in the retry length storage table 27. A process of searching from the length data, 52 is a process of determining whether the matched length data of the wire electrode 2 can be found in the process 51, 53 is an initial data setting process for the first retry operation,
54 is a process of setting the cleaning time and an intermittent time in the case of intermittent cleaning based on the result retrieved by the process 51, 55 is a process of determining whether or not the previous intermittent cleaning was performed, and 56 is a continuous cleaning operation. The process of setting the mode to be performed, 57 is the process of setting the mode to perform the cleaning operation intermittently.

Next, the operation of the second embodiment will be described with reference to FIGS.
Will be explained. The operations from processing 16 to processing 24 are the same as in the first embodiment. In the second embodiment, before performing the supply operation of the wire electrode 2, the process 46 performs automatic cleaning of the portion considered to be the cause of the retry. The detailed operation of the process 46 is as shown in FIG. First,
The data in the retry length storage table 27 is searched by the process 51. Then, process 52 determines if a retry has previously occurred. If the retry has not occurred previously, the initial data for automatic cleaning are set in process 53. The data to be set are the cleaning time and the cleaning method. If a retry has previously occurred, the process 54 is entered. In process 54, the cleaning interval and the intermittent interval are set based on the search result of process 51. The cleaning time is set longer as the number of retries increases. The intermittent interval is set randomly. When the cleaning time and the intermittent interval are set, the cleaning mode is set by the process 55. If the last cleaning was intermittent cleaning, the process proceeds to step 56, and the continuous cleaning mode is set. If the previous cleaning was continuous cleaning, the process proceeds to process 57, and the intermittent cleaning mode is set. When the cleaning method shown in FIG. 7 is selected, the process proceeds to processing 47 in FIG. In process 47, the location where the retry has occurred is selected, and process 48, process 49,
The process moves to any one of the processes 50. In process 48, a command is given to the cleaning mechanism 44 of FIG.
The cleaning liquid is further ejected to clean the inside of the upper nozzle 6. In the process 49, similarly, a command is given to the cleaning mechanism 44, the cleaning liquid is jetted from the upper die cleaning nozzle 41, the upper die 9 is cleaned, and dust and dirt are removed. In the process 50, the cleaning liquid is jetted from the lower die cleaning nozzle 43, and the lower die 1
Removes sludge, dust, dust, etc. adhering to the top surface. After performing the processing 48, the processing 49, and the processing 50, the processing shifts to the processing 16, and the automatic supply operation of the wire electrode 2 is performed again. By such an automatic cleaning process, the supply operation to be performed next can be supported, and a highly reliable wire electrode automatic supply operation can be performed.

In the above embodiment, the case where the water column 8 of the working liquid ejected from the upper nozzle 6 is used as the guiding means when the wire electrode 2 is inserted from the upper die 9 into the lower die 10 has been described. It is also possible to guide the wire electrode using something like a vertically movable pipe guide.

When the retry occurs, the wire electrode 2 may be repeatedly inserted by the upper feed motor 5 without always cutting and discharging the wire electrode 2 portion that has been fed out.

An encoder 25 is connected to the upper pulley 3 as a detector of the feed amount of the wire electrode 2, and a detector 26
I explained the case of converting to length by using
Anything can be used as long as the feed length of the wire electrode can be determined. For example, the same effect can be obtained by detecting the position where the retry occurs by using the time during which the voltage is applied to the upper feed motor 5. ..

As the cleaning means, not only an automatic cleaning method using a cleaning liquid, but also compressed air or a suction method can be used. The cleaning portion is not limited to the upper nozzle, the upper die, and the lower die as long as they are expected to hinder the supply on the wire electrode supply path.

Further, in the cleaning method of the above embodiment, the case where the cleaning time and the interval of intermittent cleaning are changed according to the past retry situation was described, but the cleaning liquid pressure is changed,
The same effect can be obtained by changing the direction in which the cleaning liquid is sprayed.

[0034]

According to the present invention, the following effects can be obtained. (1) It is possible to clearly detect whether the retry occurrence is due to an accidental cause or not by comparing with the wire electrode feed length data obtained in the past when the retry occurs and determining the data dispersion state. can do. (2) Except accidental retries, the wire electrode supply operation can be immediately stopped when retries occur due to the same cause, and thus it is necessary to wastefully retry the specified number of times as in the past. Therefore, the operation rate of the wire electrode automatic feeder is improved. (3) By displaying the places to be inspected on the display device, it is possible to visually recognize and accurately instruct the worker, so that all places of the wire electrode automatic supply device are cleaned as in the past. The need for adjustment is eliminated, cleaning and adjustment points are minimized, maintenance time can be shortened, and work efficiency is improved. (4) To automatically clean the areas that cause retries,
It is possible to eliminate the cause of retry when the wire electrode is supplied next time, and the reliability of the wire electrode automatic supply operation is improved. (5) By changing the cleaning mode to a mode different from the previous one, it is possible to change the maintenance and maintenance interval of the wire electrode automatic feeder, improve the maintenance by the operator, and omit maintenance work other than consumable parts. It is possible to improve work efficiency.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an automatic wire electrode supply device according to a first embodiment of the present invention.

FIG. 2 is a process flow chart of the first embodiment.

FIG. 3 is a detailed process flow diagram of process 29 of FIG.

FIG. 4 is an explanatory diagram of a monitor screen according to the first embodiment.

FIG. 5 is a schematic configuration diagram of an automatic wire electrode supply device according to a second embodiment of the present invention.

FIG. 6 is a process flow chart of the second embodiment.

FIG. 7 is a detailed process flowchart of the process 46 of FIG.

FIG. 8 is a schematic configuration diagram of a conventional wire electrode automatic supply device.

FIG. 9 is a processing flow chart of a conventional example.

FIG. 10 is an explanatory diagram showing a case where the wire electrode is caught in the lower die portion during the wire electrode automatic supply operation, and a transition is made to the retry operation.

FIG. 11 is an explanatory diagram showing a case in which the wire electrode is caught in the upper die portion during the wire electrode automatic supply operation, and a transition is made to the retry operation.

[Explanation of symbols]

 1 Workpiece 2 Wire Electrode 4 Upper Feed Roller 5 Upper Feed Motor 6 Upper Nozzle 7 Working Liquid 8 Water Column 9 Upper Die 10 Lower Die 11 Lower Nozzle 12 Upper Feed Motor Load Current Detector 13 Wire Cutting Exclusion Mechanism 14 Display Device 15 Numerical Value Controller 18 Retry judgment processing 22 Wire electrode disconnection / collection command processing 23 Retry count judgment processing 25 Encoder section 26 Wire feed length detection section 27 Length data storage table 28 Wire feed length storage processing 31 Maintenance / inspection location display setting processing 32 Data Retrieval Processing in Table 33 Length Data Comparison Processing 34 Data Analysis Judgment Processing 35 Inspection Point Setting Processing 41 Upper Die Cleaning Nozzle 42 Upper Nozzle Cleaning Nozzle 43 Lower Die Cleaning Nozzle 44 Cleaning Mechanism 45 Retry Position Storage Processing 46 Cleaning Method Selection Processing 47 Cleaning location selection processing 48 Upper nozzle cleaning processing 49 Upper die cleaning processing 50 Lower die cleaning processing 51 Table data retrieval processing 54 Cleaning time and interval setting processing 56 Continuous cleaning mode setting processing 57 Intermittent cleaning mode setting processing

Claims (7)

[Claims] 1. A judging means for judging whether or not the wire electrode cannot be fed, and a wire for detecting the length of the fed wire electrode when the judging means judges that the wire electrode cannot be fed. A feed length detection means, a length data storage means for storing the feed length of the wire electrode detected by the wire feed length detection means, and a wire electrode at the time of non-occurrence detected by the wire feed length detection means Comparison means for searching and comparing the feed length from the past length data stored in the length data storage means, and determining the data dispersion state from the comparison result of the length data of the comparison means, When the determination result is a concentrated distribution, a wire electrode automatic supply device comprising: a data analysis determination means for setting a non-occurrence position that occurs intensively. 2. A judgment means for judging whether or not the wire electrode cannot be fed, and a wire for detecting the length of the wire electrode sent out when the judgment means judges that the wire electrode cannot be fed. A feed length detection means, a length data storage means for storing the feed length of the wire electrode detected by the wire feed length detection means, and a wire electrode at the time of non-occurrence detected by the wire feed length detection means Comparison means for searching and comparing the feed length from the past length data stored in the length data storage means, and determining the data dispersion state from the comparison result of the length data of the comparison means, If the determination result is a concentrated distribution, a data analysis determination means for setting the non-occurrence position that occurs intensively, and a display means for displaying the set non-occurrence position on the display device. Bei wire electrode automatic feeder. 3. A wire feeding means for guiding and inserting the wire electrode, a load detecting means for detecting a load applied to a motor of the wire feeding means, and a wire electrode feeding forbidden depending on presence or absence of a load of the load detecting means. Retry determining means for determining whether or not the wire electrode feeding is impossible by the retry determining means, and a wire feed length for detecting the length of the fed wire electrode before performing the retry operation. Detection means, length data storage means for accumulating the feed length of the wire electrode detected by the wire feed length detection means, and wire feed length of the wire electrode when a retry occurs detected by the wire feed length detection means From the past length data stored in the length data storage means and a comparison means for comparing and comparing the length data of the comparison means. If the distribution of data is judged from the result and the judgment result is a concentrated distribution, data analysis judgment means for setting the retry occurrence position that occurs intensively, and the set retry occurrence position are displayed on the display device. A wire electrode automatic supply device comprising: 4. A judgment means for judging whether or not the wire electrode cannot be fed, and a wire for detecting the length of the wire electrode fed out when the judgment means judges that the wire electrode cannot be fed. A feed length detection means, a length data storage means for storing the feed length of the wire electrode detected by the wire feed length detection means, and a wire electrode at the time of non-occurrence detected by the wire feed length detection means Comparison means for searching and comparing the feed length from the past length data stored in the length data storage means, and determining the data dispersion state from the comparison result of the length data of the comparison means, When the determination result is a concentrated distribution, the data analysis determination means for setting the non-occurrence position that occurs intensively and the data analysis determination means provided in each part on the supply path of the wire electrode. Wire electrode automatic feeding apparatus comprising a cleaning means for cleaning the improper generation position to be more specific, the. 5. A wire feeding means for guiding and inserting a wire electrode, a load detecting means for detecting a load applied to a motor of the wire feeding means, and a wire electrode feeding forbidden depending on presence or absence of a load of the load detecting means. Retry determining means for determining whether or not the wire electrode feeding is impossible by the retry determining means, and before performing the retry operation, the wire electrode feeding for detecting the length of the wire electrode fed out. A length detection means, a retry position determination means for determining a retry occurrence position based on the wire electrode feed length detected by the wire feed length detection means, and a retry position provided at each part on the wire electrode supply path. A wire electrode automatic supply device comprising: a cleaning unit that cleans the retry occurrence position specified by the determination unit. 6. A judgment means for judging whether or not the wire electrode cannot be fed, and a wire for detecting the length of the fed wire electrode when the judgment means judges that the wire electrode cannot be fed. A feed length detection means, a length data storage means for storing the feed length of the wire electrode detected by the wire feed length detection means, and a wire electrode at the time of non-occurrence detected by the wire feed length detection means Data retrieval means for retrieving the feed length from the past length data stored in the length data storage means, cleaning means provided in each part on the wire electrode supply path, and retrieval of the data retrieval means A wire electrode automatic supply device comprising: a cleaning mode setting means for selecting a cleaning time and a cleaning method for the cleaning means corresponding to the non-occurrence position according to the result. 7. A wire feeding means for guiding and inserting the wire electrode, a load detecting means for detecting a load applied to a motor of the wire feeding means, and a wire electrode feeding forbidden depending on presence or absence of a load of the load detecting means. Retry determining means for determining whether or not the wire electrode feeding is impossible by the retry determining means, and a wire feed length for detecting the length of the fed wire electrode before performing the retry operation. Detection means, length data storage means for accumulating the feed length of the wire electrode detected by the wire feed length detection means, and wire feed length of the wire electrode when a retry occurs detected by the wire feed length detection means Data retrieval means for retrieving from the past length data stored in the length data storing means, and A cleaning means provided, a cleaning mode determination means for determining the previous cleaning mode based on the search result of the data search means, and a selection for changing the next cleaning mode for the cleaning means corresponding to the retry occurrence position by the cleaning mode determination means And a cleaning mode selecting means for controlling the wire electrode automatic supply device.