JP5953154B2 - Machining program editing method and machining program editing system for wire electric discharge machine - Google Patents

Description

  The present invention relates to a machining program editing method and a machining program editing system for a wire electric discharge machine, in which machining conditions of a workpiece welding method at the time of wire electric discharge machining are incorporated into the machining conditions of a wire electric discharge machine.

  In general, wire electric discharge machines are often used for die cutting of mold members. When electric discharge machining is performed on workpieces with wire electric discharge machines, electric discharge machining involves rough machining, intermediate finishing, finishing machining, The wire electrical discharge machining of the workpiece is completed through a machining process such as final finishing, but at the stage immediately before the end of the fast machining corresponding to the rough machining process, the machining member is dropped between the workpiece and the workpiece. Therefore, the EDM is not performed and the unmachined part remains. However, if an unmachined part of the workpiece is left, an operator who is proficient in machining later manually cuts the workpiece from the workpiece or requires a workpiece recovery device. There was a problem of reducing the rate.

  Conventionally, when wire electrical discharge machining is performed by driving a wire electrical discharge machine, the machining definition of the workpiece shape can be automatically performed, saving the labor of the operator, machining definition time and actual machining time. An NC data creation method for wire electrical discharge machining that attempts to shorten the length of the wire is known. The NC data creation method for wire electric discharge machining is designed when a machining shape for wire electric discharge machining is designed, a machining process is set for each shape based on the designed machining shape, and the machining shape is extracted. It is determined whether it is an enlargement process or a cut-off process according to the size of the shape. If the determined process is an enlargement process, an approach is set in the longitudinal direction of the process shape. When the processing is cut-off processing, an automatic scrap processing position is set when the processed shape is cut off (see, for example, Patent Document 1).

  Further, as an NC data creation system for wire electric discharge machining, there is known a system for creating NC data in accordance with the operator's purpose while guaranteeing a certain level of machining. The NC data creation system for wire electric discharge machining is constructed on a CAM system, and NC data in which a machining shape and a machining pattern in which a combination of basic operation items necessary for wire electric discharge machining of the machining shape is set is associated. , NC data output means by machining pattern is output, and NC data editing option providing means provides NC data editing method options for each machining pattern for the output NC data, and the operator selects this. By using the NC data editing method for each machining pattern, the NC data editing means edits the NC data for each machining pattern and outputs the edited NC data (for example, Patent Document 2).

  Further, as a wire electric discharge machining method, when performing wire electric discharge machining by a machining program that does not include a remaining past program such as a machining remaining distance, the wire electric discharge machining is performed by determining the machining remaining distance based on the machining program. Are known. In the wire electric discharge machining method, when the workpiece is cut, the remaining machining distance is determined based on the shape of the cutting process specified by the machining program, so that the creation of the machining program can be simplified and speeded up. At the same time, it is possible to reliably prevent the core from falling by setting the remaining machining distance suitable for the machining shape (see, for example, Patent Document 3).

  In addition, as a wire-cut electric discharge machining method, there is known a method in which the falling side of a workpiece is held by a deposit. The wire-cut electric discharge machining method increases the amount of deposits to such an extent that a part or all of the machining grooves formed by electric discharge during machining can be filled, and the workpiece on one side of the machining grooves is removed. Is held on the remaining workpiece during processing (see, for example, Patent Document 4).

JP-A-6-304818 JP 2005-297089 A JP 2000-280124 A Japanese Patent No. 1377867

  However, the NC data creation method for wire electric discharge machining shows the approach of cutting and enlargement as shown in FIG. In consideration of machining efficiency, the approach element is attached in the short direction of the shape, that is, in the direction where the distance from the initial hole to the approach element is short in order to reduce the approach distance. In the case of processing, in the case of a small shape, it is attached in the longitudinal direction of the shape, that is, the direction in which the distance from the initial hole to the approach element is long from the viewpoint of accuracy in that distortion is removed by processing in advance by approach processing. Accordingly, the NC data creation method for wire electric discharge machining has a machining program for welding and holding a workpiece obtained by electric discharge machining of a workpiece at a predetermined position on the machining locus. It has no technical idea.

  By the way, the applicant has qualitatively explained that when a long gap discharge phenomenon causes a dielectric breakdown in which a metal electrode is arranged in an insulator (gas), it starts with corona discharge, and then passes through spark discharge and then arc discharge. Focusing on the end of dielectric breakdown, the “voltage-current characteristics” of these phenomena are appropriately controlled, and spark discharge is performed to cause arc discharge between the wire electrode and the workpiece. We developed an invention that uses arc welding (plasma welding) to weld a workpiece that is separated from the workpiece by electrical discharge machining to the workpiece at a predetermined location, and temporarily holds the workpiece on the workpiece. Filed a patent application. In other words, the present applicant has developed a technical idea of using a wire electrode to discharge-machine a cut workpiece from a workpiece and temporarily welding the workpiece to the workpiece during wire EDM. The Japanese patent application No. 2011-16692 and its domestic priority application were filed as Japanese Patent Application No. 2011-212221.

  Conventionally, in order to prevent the workpiece from falling off between the workpiece and the workpiece, the wire electrical discharge machining method in which the EDM is not performed and the unmachined portion is left is performed. The machined parts must be separated from the workpiece, the machining efficiency is extremely low, and the wire-cut electric discharge machining method of depositing deposits in the machining grooves actively attaches the workpiece to the workpiece. It is not a thing to weld, but there was a problem in reliability and stability. However, in the above-described workpiece cutting method, the workpiece and the workpiece are welded in a part of the shape of the workpiece in the welding cycle, and the workpiece is welded on the machine. The workpiece can be separated from the workpiece with a simple external force in a very short time compared to the electric discharge machining again, and the process of mounting and removing is not required, greatly improving the machining process. In addition to being able to do so, it was highly reliable and stable in temporarily holding the workpiece on the workpiece. However, in the above-described method for editing a machining program for a wire electrical discharge machine in the wire electrical discharge machining method, since the workpiece is welded to the workpiece, the NC for the welding length and the welding location suitable for the shape and weight of the workpiece is used. Since the processing data is not incorporated and it is not possible to cope with the automatic welding cycle, the worker is instructing manually from experience.

  An object of the present invention is to solve the above-mentioned problems, and in consideration of the fact that a machining member such as a core that is separated from a workpiece by electric discharge machining can be welded to the workpiece, a controller, that is, a computer or NC device ( The NC machining data, machining conditions, workpiece material, etc. imported to the NC device are analyzed, the mass of the workpiece is calculated, and the workpiece is temporarily held in the workpiece corresponding to the mass. For this purpose, the NC unit automatically calculates the predetermined welding length of the appropriate welded part, the number of welded parts in the machined shape, and the number of welded parts, and uses an ON / OFF command to determine whether or not to form the welded part. It is configured so that it can be automatically inserted into the program and checked on the screen of the NC unit, and the workpiece can be machined over a predetermined welding length in a predetermined area along the workpiece trajectory. object To provide a machining program editing method and a machining program editing system for a wire electric discharge machine, characterized in that welding is formed to form a welded portion, and a workpiece is temporarily held on the workpiece at the welded portion. It is.

According to the present invention, a flat plate-shaped workpiece is produced by electric discharge machining the workpiece with discharge energy generated by applying an interelectrode voltage between a wire electrode and a flat plate-shaped workpiece facing the wire electrode. And machining for a wire electric discharge machine that is driven and controlled by a controller that incorporates machining information for holding the machining member on the workpiece at a welding portion where the machining member is welded to the workpiece on the machining locus of the machining member. Program editing method,
About at least the machining shape of the machining information about the machining member, the thickness of the workpiece, the number of machining members to be electro-discharge machined and the specific gravity of the workpiece, and the welding location of the machining member to the workpiece Import initial conditions into the controller,
Machining the machining member for rough machining the workpiece by analyzing a machining program for producing a flat plate shaped machining member by electric discharge machining the workpiece excluding welding of the machining member to the workpiece. Calculating a peripheral length and an upper surface area of the shape of the processed member, calculating a mass of the processed member from the processed peripheral length of the processed member, the upper surface area, the plate thickness and the specific gravity of the workpiece; Corresponding to the mass of the workpiece from a map of measured values stored in the memory of the controller with respect to the relationship between the mass of the workpiece and the predetermined weld length of the welded portion that can be held on the workpiece of the workpiece The present invention relates to a machining program editing method for a wire electric discharge machine, characterized in that a predetermined welding length of the welding portion that can be held on the workpiece by the machining member is calculated.

Further, in the machining program editing method for the wire electric discharge machine, the welding portion of the machining member to the workpiece is determined to have a welding location at least at a final machining location of the machining member. Further, the processing program editing method for the wire electric discharge machine, the initial condition number number of welding locations filled in with the shortest length of the bonded portion one place, the machining circumferential length computed of the workpiece From the above, the welding locations divided equally are determined.

  Further, the machining program editing method for the wire electric discharge machine is configured to perform electric discharge machining of the workpiece with the wire electrode by the wire electric discharge machine in response to the information on the weld location and the weld length of the weld portion. In doing so, the electromachining condition applied between the wire electrode and the workpiece at the predetermined location of the machining member is changed from a machining cycle to a welding cycle to melt a part of the wire electrode, A control command is incorporated into the NC apparatus for causing the workpiece to be held on the workpiece by welding the workpiece to the workpiece at the welding portion having a predetermined welding length.

  Further, the machining program editing method for the wire electric discharge machine is configured such that a machining fluid is supplied between the workpiece and the wire electrode at a predetermined jet flow during the electric discharge machining of the workpiece by the wire electrode. When the wire electrode is returned along the machining locus of the machining member, which is jetted by pressure and discharged from the workpiece of the wire electrode, the jet pressure of the machining liquid is reduced.

Further, in the machining program editing method for the wire electric discharge machine, whether or not the machining member is welded to the workpiece at the welding portion after the welding cycle of the machining member to the workpiece is completed. A confirmation step for detecting the above can be incorporated into the machining program. Furthermore, at the end of the rough machining on the workpiece, the inclination of the machining member with respect to the workpiece is confirmed by sensing the contact of the wire electrode with the machining member, and it is detected whether or not it is held by welding. A confirmation process can be incorporated into the machining program. Also, processing member welding part information for forming the welding portion of the processing member on the workpiece on the upper, middle and / or lower portions in the plate thickness direction of the processing member may be incorporated into the processing program. It is possible.

  Further, the present invention provides a machining program reading means for reading a machining program for a wire electric discharge machine into an NC device of the wire electric discharge machine in order to carry out the machining program editing method for the wire electric discharge machine. Display means for displaying a machining program, display means for displaying a machining program incorporating a welding process after editing the machining program, and output means for outputting the machining program incorporating the welding process The present invention relates to a machining program editing system for a wire electric discharge machine.

As described above, the machining program editing method and machining program editing system for the wire electric discharge machine according to the present invention include a machining program that is a part of NC data input to the NC apparatus, and a plate thickness of the workpiece. Analyzing the specific gravity of the workpiece material, calculating the mass of the workpiece such as the core, and corresponding to the mass of the workpiece, the condition of the appropriate welded part that can hold the workpiece on the workpiece, that is, the workpiece Automatic calculation of the welding location and welding length of the welded part where the workpiece is welded to the workpiece at a predetermined point on the machining trajectory, and the welding process ON / OFF command can be automatically inserted into the machining program At the same time, it is possible to check on the screen of the NC unit, and the operation of temporarily holding the workpiece on the workpiece at the welded part can be performed automatically without requiring skill, and wire electric discharge machining. Sometimes Can be held-determined predetermined to form the welded portion by welding a workpiece to the workpiece at one or more positions the workpiece workpiece temporarily.
The machining program editing method for this wire electric discharge machine can automatically calculate the welding length from the mass of the workpiece and temporarily weld the workpiece to the workpiece with an appropriate length. Compared to holding the workpiece on the workpiece without performing partial electrical discharge machining, the manned machining time can be greatly reduced, so the operating efficiency of the wire electrical discharge machine can be improved. In addition, since the final part of the processed shape of the processed member is temporarily held by the workpiece in the welding process, the processed member is securely held by the workpiece, and the phenomenon of falling of the processed member can be prevented. Further, when the welding position of the workpiece to the workpiece is determined at a plurality of locations, for example, three locations, the twisting phenomenon of the workpiece to the workpiece can be prevented, and the workpiece can be stably held on the workpiece. Further, in the welding step in the machining member welding method, it is possible to control so as to prevent the machining member from dropping from the workpiece by reducing the water amount or water pressure of the machining fluid as compared with electric discharge machining.
However, if at least a part of the workpiece and the workpiece are connected in an unprocessed state, the probability that the workpiece will fall even at a useful high water pressure, that is, a large amount of water during machining, is very low. When the last machining location of the workpiece, that is, the last welding location is completed, the workpiece is held by the workpiece only at the welded portion. Therefore, if the hydraulic pressure of the machining fluid is high, the probability that the workpiece will fall increases. . Therefore, when the last machining for the workpiece is finished and the wire electrode is returned, the hydraulic pressure of the machining fluid, that is, the water flow is dropped. In addition, if the workpiece has been processed, it is possible to move the wire electrode by simple feed, but small protrusions etc. tend to remain in the processing locus on the overlap of the processing locus, so the return of the wire electrode It is preferable that the machining fluid flows even in a small amount in order to keep the workpiece in a state where it can be machined and to be able to machine the workpiece.

It is explanatory drawing which shows the wire electric discharge machine which can incorporate the process member welding process at the time of the wire electric discharge machining in the program edit method for machining for the wire electric discharge machine by this invention. It is an electrical circuit diagram which shows the basic circuit which achieves the process member welding process at the time of the wire electric discharge machining in the program edit method for machining for wire electric discharge machines by this invention. 2 is a waveform diagram showing a voltage waveform on the upper side and a current waveform on the lower side by ON / OFF control of the switch S1 and the switch S2, and (A) is normal processing by the basic circuit of FIG. The voltage / current waveform of the machining cycle is shown, and (B) shows the voltage / current waveform of the welding cycle for welding the workpiece and the workpiece by the basic circuit of FIG. It is an electric circuit diagram which shows the electric circuit which embodies the basic technical idea for achieving the process member welding process in the processing program edit method for wire electric discharge machines by this invention. 4 is a waveform diagram showing a voltage waveform on the upper side and a current waveform on the lower side by ON / OFF control of the switches S1, S2 and S3 in the electric circuit of FIG. A voltage / current waveform of a machining cycle that is machining is shown, and (B) shows a voltage / current waveform of a welding cycle in which a workpiece and a workpiece are welded by the electric circuit of FIG. It is an electric circuit diagram which shows one Example of the concrete electric circuit for achieving the process member welding process in the processing program edit method for wire electric discharge machines by this invention. The relationship between the workpiece and the workpiece in the welding part welding process at the time of wire electric discharge machining is shown. (A) shows three parts including the final machining area by machining the workpiece from the start hole into a square machining shape. (B) is an exaggerated enlarged perspective view showing a machining locus of the electric discharge machining of the workpiece in (A) by a dotted line. It is a graph which shows the result of the load resistance which destroys the welding part at the time of welding a process member to a workpiece in the process member welding process in the processing program edit method for wire electric discharge machines by this invention. It is a processing flowchart which shows the program edit method for a process for the wire electric discharge machine by this invention.

  Hereinafter, a machining program editing method and a machining program editing system for a wire electric discharge machine according to the present invention will be described with reference to the drawings. About this machining program editing method, in the welding process, welding processing conditions are introduced into the machining condition database inside the NC device, this machining program editing method is introduced as a system application to the NC device, and the original machining program Can be used with existing wire electric discharge machines. More specifically, in this machining program editing method, an editing system application is installed and used in an NC apparatus or a computer provided in the wire electric discharge machine. The storage unit for installation in the NC unit or computer has specific information such as the machining conditions, thickness, material specific gravity, machining path, etc. of the workpiece 6, and this machining program editing method uses such information. This means that multiple functions and their results are combined during editing.

  For example, as disclosed in Japanese Patent Application No. 2011-212221 relating to the present applicant, a work piece uncut machining method that is a welding member welding method at the time of wire electric discharge machining using a wire electric discharge machine is used. Without completely separating the machining member 26 having a predetermined machining shape 21 by electric discharge machining, the machining member 26 is temporarily melted by welding a part of the wire electrode 5 and welded to the workpiece 6 at the welding portion 20 on the machining locus. It is to hold. The machining shape 21 of the machining member 26 can be expressed as a movement or trajectory of the wire electrode 5. Here, a part of the wire electrode 5 to be melted is a wire peripheral portion of a predetermined length of the wire electrode 5, and the wire electrode 5 is welded to the workpiece 6 with the wire electrode melt. Reference numeral 5 indicates that the supply state of the wire electrode 5 is maintained without disconnection. In this processing member welding method, the welding of the workpiece 6 and the processing member 26 is favorably performed when the wire electrode 5 contains a copper alloy system. Further, in this workpiece welding method, the electrical machining condition applied between the wire electrode 5 and the workpiece 6 is changed from the machining cycle to the welding cycle in at least one place of the predetermined machining shape 21 of the workpiece 6. Then, a part of the wire electrode 5 is melted to weld the workpiece 6 and the processing member 26 at the welding portion 20 at a predetermined position, and the processing member 26 is held on the workpiece 6 by the welding portion 20. , Prevents the workpiece 26 from falling off the workpiece 6. Further, as shown in FIG. 7, since the welded portions 20 between the workpiece 6 and the machining member 26 exist at three locations including the facing position, the machining member 26 is held by the workpiece 6 in a well-balanced manner. . Further, in this process member welding method, when the wire electrode 5 is disconnected in the process of melting the part of the wire electrode 5 and welding the workpiece 26 and the workpiece 6, the wire electrode 5 is disconnected at the wire electrode disconnection point. Then, the workpiece 5 and the workpiece 26 are welded together, or the machining step of performing the electric discharge machining of the workpiece 6 by the wire electrode 5 can be continued. . Further, the processed member 26 becomes a product or an unnecessary scrap depending on circumstances.

  In particular, the machining program editing method for the wire electric discharge machine according to the present invention includes at least the machining shape of machining information about the machining member 26, the thickness 6 of the workpiece 6, that is, the machining member 26, and the machining member 26 subjected to electric discharge machining. The initial conditions of the number and the specific gravity G of the workpiece 6, that is, the workpiece 26, and the location where the workpiece 26 is welded to the workpiece 6 are loaded into a controller, that is, a computer or NC device, and the original program, ie, machining to the workpiece 6 is performed. By analyzing the machining program excluding the welding process of the member 26, the machining circumferential length L of the machining member 26 for roughing the workpiece and the upper surface area A of the shape of the machining member 26 are calculated, and the machining of the machining member 26 is performed. The mass M (= A × T × G) of the machining member 26 is calculated from the circumference L, the upper surface area A, the plate thickness T, and the specific gravity G of the workpiece 6 or the machining member 26, and the machining portion Regarding the relationship between the mass M of the material 26 and the predetermined welding length L of the welded portion 20 that can be held on the workpiece 6 of the workpiece 26, the measured values stored in the memory of the NC device as shown in FIG. From the map, an appropriate predetermined welding length L of the welding portion 20 that can hold the workpiece 26 on the workpiece 6 corresponding to the mass M of the workpiece 26 is calculated. Further, in this machining program editing method, it is necessary to convert an original program of a conventional wire electric discharge machine into a welding process program when the workpiece 6 is electric discharge machined by a wire electric discharge machine. When converting the original program of the conventional wire electric discharge machine into the welding program of the present invention, using the processing conditions of the original program, the welding location and the welding in the machining shape to be welded to the workpiece 6 The length is required to be converted into a welding processing program by a simple operation using a system application introduced in advance into a personal computer or an NC device of a wire electric discharge machine for each shape of the processing member 26. That is, the original program is taken into the NC device, the machining conditions such as the machining shape and the number of machining of the machining member 26 in the program are analyzed, and the machining circumferential length, weight, mass, etc. of the machining member 26 are calculated, and thereby the machining member A welding program can be created so that a welding position and a welding length are calculated for each shape of the processed member 26 from the processing peripheral length and mass of the 26.

  Further, in this machining program editing method, the welding portion 20 of the machining member 26 to the workpiece 6 is determined to have a welding location at least at the final machining location of the machining member 26. 6 is preferable from the standpoint of reliably and stably holding. Further, in this machining program editing method, it is preferable to determine the welding location equally divided from the number of welding locations input in the initial conditions and the machining circumferential length of the machining member 26. More specifically, this machining program editing method is used when the workpiece 6 is subjected to electric discharge machining with the wire electrode 5 by the wire electric discharge machine in response to the information on the welding location of the welding portion 20 and the welding length L. The electrical machining condition applied between the wire electrode 5 and the workpiece 6 at a predetermined location of the machining member 26 is changed from the machining cycle to the welding cycle to melt a part of the wire electrode 5 to make the workpiece 26 work. 6 is a welding program for holding the workpiece 26 on the workpiece 6 by welding at a welding portion 20 having a predetermined welding length determined in advance to a controller which is an NC device of a wire electric discharge machine or a computer. It is incorporated as a control command. Further, in this machining program editing method, when the workpiece 6 is subjected to electric discharge machining by the wire electrode 5, the machining fluid is jetted between the workpiece 6 and the wire electrode 5 at a predetermined predetermined jet pressure, and the wire When the wire electrode 5 is returned from the workpiece 6 of the electrode 5 along the machining locus 27 of the machining member 26, the machining program for reducing the jet pressure of the machining fluid is incorporated.

  Further, this machining program editing method, for example, as disclosed in Japanese Patent Application No. 2012-094408 relating to the present applicant, after the process of welding the workpiece 26 to the workpiece 6 is completed, A confirmation process for detecting whether or not the workpiece 6 is welded to the workpiece 6 can be incorporated into the machining program. Further, at the end of the rough machining on the workpiece 6, the inclination of the machining member 26 with respect to the workpiece 6 is confirmed by sensing the contact of the wire electrode 5 with the machining member 26, and it is confirmed whether or not it is held by welding. The process can be incorporated into a machining program. Further, this processing program editing method, for example, as disclosed in Japanese Patent Application No. 2012-134030 related to the present applicant, the welded portion 20 of the processing member 26 to the workpiece 6 is replaced with the plate of the processing member 26. It is possible to incorporate into the machining program information on the welded part of the working member that is welded to not only the upper part in the thickness direction but also the middle part, the lower part, or a plurality of places.

  In addition, the machining program editing system for a wire electric discharge machine according to the present invention executes the above-described machining program editing method, so that the machining program for the wire electric discharge machine is transferred to the NC device or the computer of the wire electric discharge machine. Reading machining program reading means, display means for displaying the machining program, display means for displaying the machining program incorporating the welding process after editing the machining program, and a machining program incorporating the welding process are output. Output means. In other words, this machining program editing system includes a machining program for a wire electric discharge machine, initial conditions such as specific gravity G and thickness T of a workpiece 26 machined from the workpiece 6, and the workpiece 6. A new machining program for a wire electrical discharge machine incorporating a welding process, or a welding process using information on the wire electrical discharge machining conditions and welding process conditions for welding the workpiece 26 to the workpiece 6 at the welded portion 20 A new machining program is created for a wire electric discharge machine incorporating confirmation of welding of the workpiece 26 to the workpiece 6 and confirmation of removal of the workpiece 26 from the workpiece 6.

  With reference to FIG. 1, a wire electric discharge machine incorporating the present invention will be described. The wire electric discharge machine mainly includes a source bobbin 7 attached to the machine body 15 and winding up the wire electrode 5, and a plurality of direction changing rollers for changing the direction of the wire electrode 5 in the wire feed system fed from the source bobbin 7. 8, a brake roller 9 for applying a brake to the wire electrode 5 so that the wire electrode 5 is fed out properly, a tension roller 12 for applying tension to the wire electrode 5 to be fed, and a guide roller for guiding the wire electrode 5 to the supply pipe 13 32 etc. The wire electrode 5 passes through the direction changing roller 8 and the guide roller 32 in the wire supply system, and is supported by a wire supply roller 10 and a wire electrode feed unit 24 which are a pair of annealing rollers provided in the main body head 1. After passing through the pipe 13 and the pair of common rollers 11, the wire electrode 5 is sandwiched between the pair of wire supply rollers 10 and the pair of common rollers 11, and the power supply 18 (see FIG. 4), a current from the machining power source is supplied to the wire supply roller 10, the wire electrode 5, and the common roller 11, and the wire electrode 5 between the wire supply roller 10 and the common roller 11 is annealed to cause bending or the like. Next, the unannealed tip of the wire electrode 5 is cut by the cutter 14 and removed, and the wire electrode 5 is straightened. To immediately state. Thereafter, the annealed wire electrode 5 is guided by the supply pipe 13 according to the lowering of the supply pipe 13 supported by the supply pipe holder which is the wire electrode feeding unit 24 according to the delivery of the wire supply roller 10 and reaches the upper head 2. Inserted. Moreover, the workpiece 6 to be subjected to electric discharge machining is fixed by a clamp 25 to a work table 23 provided in a machining tank or the like.

  In addition, between the annealing roller 10 and the common roller 11, the tip of the wire electrode 5 is cut when the tip of the wire electrode 5 is made good, when the wire electrode 5 is disconnected, during annealing, or the like. A cutter 14 is provided, and a waste wire clamp (not shown) for discarding the wire electrode 5 cut by the cutter 14 is provided. The cutter 14 is configured to cut the wire electrode 5 by operating the cutter unit. When the wire electrode 5 is connected, the wire electrode 5 that has passed through the supply pipe 13 is first supplied to the upper head 2 by the low-speed rotation of the wire supply roller 10, passes through the upper head 2, and passes through the start hole of the workpiece 6. After being inserted into the hole 19 of the processing locus and received by the lower head 4 facing the lower side of the upper head 2 and the wire electrode 5 passes through the lower head 4, the wire supply roller 10 is switched to high speed rotation. The wire electrode 5 fed out from the lower head 4 is installed from the direction changing roller provided in the lower arm 3 to the wire guide pipe 37, the water separation portion provided at the outlet of the wire guide pipe 37, and the downstream of the water separation portion. The winding roller 35 sequentially passes, is drawn out by the winding roller 35, and is further sucked by a suction device or the like provided downstream of the winding roller 35. It is collected in the waste Waiyahoppa 36. The brake roller 9 is provided with an encoder 16 for detecting the rotational speed. The sensor 17 is attached to a lower support (not shown) of the main body head 1 in order to detect the bending, bending, insertion state, and the like of the wire electrode 5. In this wire electric discharge machine, the material of the workpiece 6 is, for example, die steel, NAK material, SKD, iron-based material, or super hard material, and the plate thickness is, for example, 10 mm. The material of the wire electrode 5 is, for example, a metal material such as tungsten, copper alloy (brass), piano wire, etc. Here, brass electrode wire and brass alloy are used, and the wire diameter is φ0. It is 10-0.25 mm. Further, it is made of a metal material whose surface is coated with them as a core material, for example, a copper alloy coating layer when the core material is not a copper alloy system, and a coating layer material such as zinc when the core material is a copper alloy system. In this embodiment, the workpiece 6 has a flat plate shape as shown in FIG. 7, that is, a flat plate shape whose upper and lower surfaces are parallel, and is inserted into holes 19 such as a plurality of start holes and machining tracks. A current is supplied to the wire electrode 5 from the power supply 18 and a voltage is applied between the wire electrode 5 and the workpiece 6 to perform the electric discharge machining of the workpiece 6. At that time, the plate, the core, etc. A processing member 26 that is a processing member is generated.

  In this method of welding a workpiece at the time of wire electric discharge machining, in order to change the electrical machining condition from the machining cycle to the welding cycle, the current (A) passed through the wire electrode 5 is as shown in FIG. 3 and FIG. The current peak flowing from the high voltage load HV to the wire electrode 5 is reduced to about 1/4 times, for example, and applied between the electrode between the wire electrode 5 and the workpiece 6 in comparison with the current for wire electric discharge machining. For example, the voltage (V) to be lowered is reduced to about 1/4 times, and further, the pulse of the current flowing through the wire electrode 5 is increased to about 2 times, for example, to shift from machining discharge to arc discharge. The work member 26 is welded to the workpiece 6 at the weld portion 20 by arc welding using the wire electrode 5. Further, the machining conditions in the welding cycle are such that while the workpiece 6 is cut, a part of the facing portion between the workpiece 6 and the machining member 26 and another portion are welded as the welding portion 20. Here, the part of the facing part is a part of the part where the workpiece 6 and the machining member 26 face each other. Further, since the welded portion 20 between the workpiece 6 and the machining member 26 is present at the edge portion (only the upper portion in FIG. 7), it can be broken with a slight external force, so the electric discharge machining of the workpiece 6 is completed. Later, the welded portion 20 is broken by an external force, and the workpiece 26 is easily separated from the workpiece 6. Further, the welded portion 20 between the workpiece 6 and the processed member 26 can be broken by a weak external force, but the fracture load resistance of the welded portion 20 between the workpiece 6 and the processed member 26 is the result of an experiment as shown in FIG. The measured value is information that is formed in a map and stored in the memory of the NC device.

In this machining program editing method for a wire electric discharge machine, a workpiece 26 is welded to a workpiece 6 and a welded portion 20 is welded to any part of a machining shape 21 of a wire electric discharge machine currently used. This is to edit the machining information incorporating the process for loading into the machining program of the NC device. That is, the function of welding the workpiece 26 to the workpiece 6 is added to the wire electric discharge machine, and the welding machining conditions are incorporated in the memory of the NC device as a control device.
Further, in this wire electric discharge machine, the following can be considered as processing conditions necessary for temporarily holding the workpiece 26 to the workpiece 6 by the welding portion 20.
(1) The welding length L of the welded portion 20 necessary for holding the workpiece 26 on the workpiece 6 is calculated according to the mass M of the workpiece 26.
(2) Calculate the number of welding locations of the welded portion 20 in the machining locus 27 and the welding length L of one equally divided portion at that time, for example, the shortest 1 mm / location.
(3) In order to ensure the reliability and stability of holding the workpiece 26 on the workpiece 6, the results of experiments in which the same workpiece welding method was repeated were introduced. (3-1) The workpiece 26 The formation of the welded portion 20 at the final processing location of the holding has stability of holding. (3-2) After the welding process of the workpiece 26 to the workpiece 6 is completed, the water flow pressure of the machining fluid when moving the wire electrode to the start hole or when backing the wire electrode 5 along the machining locus 27 is set. Issue a command to reduce.
(4) Location where the welded portion 20 is formed on the machining locus 27 in the machining shape 21 and the plate thickness T of the machining member 26, the specific gravity G of the material of the machining member 26, which are the minimum initial conditions for incorporating the welding process (For example, the default 3 welding locations are preferable based on experimental results).

As a process of incorporating a welding process for welding the workpiece 26 to the workpiece 6 when performing electric discharge machining with a wire electric discharge machine, the following processing process is required for the NC apparatus as a minimum.
(1) Read machining program (G code) into NC unit and input initial conditions.
(2) Determine the roughing (first machining) portion for the workpiece 6.
(3) Machining of the machining member 26 separated from the workpiece 6 from the machining program (G code) and the movement instruction amount of each axis (X axis, Y axis, Z axis, U axis, V axis) of the wire electric discharge machine Calculate the circumference and the upper surface area of the processed member 26 on the system application.
(4) Corresponding to the machining circumferential length of the machining member 26, the minimum welding length L appropriate for holding the workpiece 6 to the workpiece 6 is held (for example, 3 mm is set as a default). To calculate. Here, the default is a value set as an initial condition, which can be changed by the user, but is set to return to the default value when reset.
(5) The mass M of the processed member 26 is calculated from the upper surface area A, the plate thickness T, and the specific gravity G of the processed member 26 (M = A × T × G).
From the data of the experimental results (for example, the data shown in FIG. 8), the welding length L required to hold the workpiece 26 on the workpiece 6 with respect to the mass M of the workpiece 26 is calculated, and the welding location input as the initial condition Divide the welding length L evenly from the number N and calculate the welding length L at one location.
(6) From the result of equally dividing the workpiece 6 with respect to the circumferential length of the processed member 26 in consideration of the conditions for forming the welded portion 20 at the final portion of the processed track 27 of the processed member 26 by electric discharge machining, 27 to determine the weld location.
(7) Create moving blocks for the welding process and electrical discharge machining in the machining program, and write execution commands for welding conditions to the machining program at the welding location.
(8) The machining location of the workpiece 6 to be welded is displayed graphically on the screen of the NC device, and the operator is made to judge whether the machining condition is OK or NG.
(9) When the machining condition is OK, the edited result is written in the machining program memory with a new name, and the editing system application is terminated.
(10) When the machining condition is NG, restart from the initial input screen.

Next, an embodiment of the machining program editing method for the wire electric discharge machine will be described with reference to the processing flow diagram of FIG. The machining program editing method for the wire electric discharge machine is configured to apply a work voltage to the work piece 6 by using discharge energy generated by applying an inter-electrode voltage between the wire electrode 5 and the flat work piece 6 facing the wire electrode 5. A flat plate-shaped processed member 26 is produced by electric discharge machining, and processing information for holding the processed member 26 on the workpiece 6 at the welding portion 20 where the processed member 26 is welded to the workpiece 6 is taken in the processed locus of the processed member 26. The drive is controlled by a controller (not shown). The machining shape 21 of the machining member 26 for machining the workpiece 6 from the NC data is taken into the controller (step S1). Next, the machining circumferential length L for each machining shape 21 of the machining member 26 is calculated by the movement length of the wire electrode 5 (step S2). Here, an area value for each shape of the processed member 26 is acquired (step S3), and an approximate value of the upper surface area A for each processed member 26 is calculated by integration or the like (step S4). Next, the mass M of the processed member 26 is calculated (M = A × T × G) from the upper surface area A, the plate thickness T, and the specific gravity G of the processed member 26 (step S5). The location of the welded portion 20 is determined by a method such as equally dividing from the circumferential length L of the processed member 26, the welded location, and the minimum welded length (step S6), and further, the distance between the welded portions 20 is calculated, and the processed member The determination is made in consideration of the mass M of 26 (step S7). Further, an ON / OFF command as to whether or not to form the welded portion 20 is automatically inserted into the machining program, and the NC program is edited (step S8).

2 and 3, the basic principle of the workpiece welding method during wire electric discharge machining according to the present invention will be described. In particular, the processing cycle and the welding cycle disclosed in Japanese Patent Application No. 2011-212221, which is a patent application relating to the present applicant, are the same as those described above, and will be described briefly here.
The electric circuit shown in FIG. 2 includes a first circuit in which a low-voltage load LV with resistance for checking an interelectrode condition and a first switch S1 are connected in series with respect to the interelectrode between the wire electrode 5 and the workpiece 6, and A second circuit in which a high voltage load HV for electric discharge machining and a second switch S2 are connected in series is connected in parallel. The first circuit is a circuit for mainly confirming an inter-electrode situation between the wire electrode 5 and the workpiece 6, and the workpiece 6 and the wire electrode 5 are in an appropriate positional relationship for electric discharge machining of the workpiece 6. The resistor R has a function of adjusting the current flowing through the first circuit. Accordingly, the switch S1 is ON / OFF controlled before the electric discharge machining of the workpiece 6 in terms of timing. The second circuit is for electric discharge machining. When the workpiece 6 is electric discharge machining, it is necessary to flow a large current in a short time, and a resistor or the like is not incorporated. Next, the machining cycle and the welding cycle for the workpiece welding method during the wire electric discharge machining will be described.
In the machining cycle which is the normal machining shown in FIG. 3A, when a pulse is generated by turning on the first switch S1, for example, a low voltage load LV is applied between the wire electrode 5 and the workpiece 6. About 80 V is generated for about 2 μsec, and it is confirmed whether or not the distance between the wire electrode 5 and the workpiece 6 is an appropriate position. If the distance between the electrodes is appropriate, discharge starts between the electrodes. . Next, when the first switch S1 is turned off and the second switch S2 is turned on to generate a pulse, a current of about 400 A, for example, is passed through the wire electrode 5 for about 0.8 μsec. A high voltage load HV of about 240 V is applied between the two and the workpiece 6 is subjected to electric discharge machining with the wire electrode 5.
In the welding cycle between the workpiece 6 and the workpiece 26 shown in FIG. 3B, when a pulse is generated by turning on the first switch S1, the gap between the wire electrode 5 and the workpiece 6 is For example, about 80 V of the low voltage load LV is generated for about 2 μsec, and it is confirmed whether or not the distance between the wire electrode 5 and the workpiece 6 is an appropriate position. Discharge starts. Next, when the first switch S1 is turned off and the second switch S2 is turned on to generate a pulse, for example, a current of about 110 A flows through the wire electrode 5 for about 3 μsec, and the wire electrode 5 and the workpiece 6 are A high voltage load HV is applied between the electrodes to about 70V, which is about ¼ of the machining time, arc discharge is generated, the wire electrode 5 is melted, and the workpiece 26 is welded to the workpiece 6 with the wire electrode melt. The

Next, with reference to FIG. 4 and FIG. 5, the basic structure of the technical idea about the processing member welding method at the time of wire electric discharge machining will be described. A basic electric circuit for achieving this method of welding the workpiece includes a low-voltage load LV with a resistance R and a first switch S1 for inter-electrode state confirmation with respect to the inter-electrode space between the wire electrode 5 and the workpiece 6. A first circuit connected in series, a second circuit in which a high voltage load for electric discharge machining and a second switch S2 are connected in series, and a first circuit in which a first diode D1 and a third switch S3 are connected in series. Three circuits are connected in parallel. In this electric circuit, the change of the electric machining conditions from the machining cycle to the welding cycle is executed by ON / OFF control of the first switch S1, the second switch S2, and the third switch S3.
FIG. 5 shows specific values for the first switch S1, the second switch S2, the third switch S3, the voltage waveform (V), and the current waveform (A), but these values are understood. It is an example for facilitating, and it is needless to say that the voltage waveform (V) and the current waveform (A) are also exemplary waveforms. That is, the time for which the first switch S1 is turned on is the distance between the wire electrode 5 and the workpiece 6 (for example, the processing power supply, the material of the wire electrode 5, the condition of the wire diameter, the material of the workpiece 6, Parameters that vary depending on the conditions, etc.) and are indefinite without being determined by the processing conditions, etc. and are on the order of several microseconds and several tens of microseconds. 2 μsec is described. The time for turning on the second switch S2 is the ON time determined by the machining conditions (parameter input), but 0.8 μsec is described as an example in the description of the following machining cycle and welding cycle. Furthermore, the current flowing time of the current waveform and the voltage waveform application time in FIG. 5B are indefinite without being determined by the processing conditions or the like, but in the description of the processing cycle and welding cycle below, Is 3 μsec.

  In this workpiece welding method, with respect to the basic configuration, the machining cycle of the workpiece 6 by the wire electrode 5 is such that the first switch S1 is turned on and the low voltage is applied to the gap between the wire electrode 5 and the workpiece 6. The control is executed by energizing the load LV, and then energizing the high voltage load HV by turning off the first switch S1 and turning on the second switch S2. In addition, the welding cycle between the workpiece 6 and the workpiece 26 is low when the third switch S3 is kept on and the first switch S1 is turned on with respect to the gap between the wire electrode 5 and the workpiece 6. This is executed by energizing the voltage load LV, then turning off the first switch S1, turning on the second switch S2, energizing the high voltage load HV, and finally turning off the second switch S2. Is. Here, by switching the electrical machining conditions from the voltage / current waveform of the machining cycle by the wire electrode 5 to the workpiece 6 to the voltage / current waveform of the welding cycle of the workpiece 6 and the workpiece 26, the second switch S2 is turned on after a certain time. However, since the third switch S3 is ON, a circulating current flows through the first diode D1 and the third switch S3 between the workpiece 6 and the wire electrode 5, and a current having a long pulse width is generated. The discharge state becomes arc discharge, and a part of the wire electrode 5 is welded between the workpiece 6 and the machining member 26, and as a result, the workpiece 6 and the machining member 26 are welded.

Details of the machining cycle and the welding cycle in this workpiece welding method are disclosed in Japanese Patent Application No. 2011-212221, which is a patent application relating to the present applicant, and the machining cycle and the welding cycle are similar to this. So, here is a brief explanation.
An example of the machining cycle in the workpiece welding method during wire electric discharge machining will be described with reference to FIGS. 4 and 5A.
First step: When the first switch S1 is turned on and the low voltage load LV passes for a certain time, for example, about 2 μsec, discharge starts between the electrodes of the wire electrode 5 and the workpiece 6.
Second step: The second switch S2 is turned ON, the voltage drop is set as a trigger, the high voltage load HV is applied, the current rises, and the electric discharge machining of the workpiece 6 by the wire electrode 5 is performed.
Third step: The discharge time between the wire electrode 5 and the workpiece 6 is determined by the machining conditions of the workpiece 6, but, for example, about 0.8 μsec is discharged.
Fourth step: Once the first switch S1, the second switch S2, and the third switch S3 are turned OFF, the voltage applied between the electrodes of the wire electrode 5 and the workpiece 6 is set to no load, and a rest time is taken. The machining of the machining shape 21 of the workpiece 6 by the wire electrode 5 is achieved by repeating the above cycle at a cycle of 125 k to 2000 kHz.
An example of a welding cycle in this workpiece welding method will be described with reference to FIGS. 4 and 5B.
First step: When the first switch S1 is turned on and the low voltage load LV is passed for a predetermined time, for example, about 2 μsec, discharge starts between the wire electrode 5 and the workpiece 6.
Second step: The second switch S2 is turned on, the current applied with the high voltage load HV rises with the voltage drop as a trigger, and the workpiece 6 is subjected to electric discharge machining by the wire electrode 5.
Third step: When switching from the normal cycle, which is a machining cycle, to the welding cycle, the second switch S2 is turned off after a predetermined time has elapsed, but since the third switch S3 is turned on, the workpiece 6 and the wire electrode 5, a circulating current flows between them, and a current having a long pulse width can be generated. At this time, the wire electrode 5 is melted and welded to the workpiece 6 and the workpiece 26. Welds.
Fourth step: When the circulating current has completely flowed, the third switch S3 is turned OFF to take a rest time.

Another example of the processing cycle in this processing member welding method will be described with reference to FIG.
First step: When the first switch S1 is turned on and the low voltage load LV is passed for a predetermined time, for example, about 2 μsec, discharge starts between the wire electrode 5 and the workpiece 6.
Second step: The first switch S1 is turned off, the fourth switch S4 and the fifth switch S5 are turned on, the voltage drop is set as a trigger, the high voltage load HV is applied, and the current rises. The electric discharge machining of the article 6 is performed.
Third step: The fourth switch S4 and the fifth switch S5 are kept in the ON state, and the discharge time between the electrodes of the wire electrode 5 and the workpiece 6 is determined by the machining conditions of the workpiece 6. For example, about 0.8 μsec is discharged.
Fourth step: After the fifth switch S5 is kept on and the fourth switch S4 is turned off, the fifth switch 5 is turned on for sub-μsec to release the energized state of the high voltage load HV, and the current waveform Move closer to a trapezoid.
Fifth step: Once the first switch S1, the fourth switch S4, and the fifth switch S5 are turned off, the voltage applied between the electrodes of the wire electrode 5 and the workpiece 6 is set to no load, and a rest time is taken. The machining of the machining shape 21 of the workpiece 6 by the wire electrode 5 is achieved by repeating the above cycle at a cycle of 125 k to 2000 kHz.

Next, with reference to FIG. 6, a specific electric circuit diagram for the method of welding a workpiece during wire electric discharge machining will be described. Here, in the electric circuit diagram of FIG. 6, the drawings of voltage waveforms and current waveforms generated by the ON / OFF control of the first switch S1, the fourth switch S4, and the fifth switch S5 are omitted. .
A specific electric circuit for achieving the workpiece welding method at the time of wire electric discharge machining is a low voltage load with resistance and a first switch for checking the gap condition between the wire electrode 5 and the workpiece 6. A first circuit in which S1 is connected in series; a high voltage load for electric discharge machining; a second circuit in which a fourth switch S4 and a fifth switch S5 are connected in series; a second diode D2 and a fifth switch S5; Are connected in parallel to the third circuit connected in series, and the fourth circuit in which the third diode D3 and the fourth switch S4 are connected in series. In this electric circuit, when the fourth switch S4 and the fifth switch S5 are turned on, the high voltage load HV can be energized with respect to the gap between the wire electrode 5 and the workpiece 6.
The change of the electrical machining conditions from the machining cycle to the welding cycle is executed by ON / OFF control of the first switch S1, the fourth switch S4, and the fifth switch S5. When the fifth switch S5 is ON, after the fourth switch S4 is turned OFF, the first circulation passing through the second diode D2 and the fifth switch S5 with respect to the gap between the wire electrode 5 and the workpiece 6 Current flows. In addition, when the fourth switch S4 is ON, after the fifth switch S5 is turned OFF, the third diode D3 and the fourth switch S4 pass through the third diode D3 and the fourth switch S4 with respect to the gap between the wire electrode 5 and the workpiece 6. Two circulating currents flow. That is, in this electric circuit, the first circulating current and the second circulating current flow alternately by ON / OFF control of the first switch S1, the fourth switch S4, and the fifth switch S5. If the workpiece cutting remaining machining method in the wire electric discharge machining according to the present invention is carried out using a specific electric circuit incorporating the diode D2 and the diode D3, two circulating currents are generated. The problem of heat generation due to switching can be alleviated by generating a circulating current alternately by approaching the shape. In this wire electric discharge machining, the workpiece uncut machining method uses the circulating current to weld the workpiece 6 and the machining member 26, so that the current waveform can be lowered slowly compared to the electric discharge machining of the workpiece 6. it can. Needless to say, the ON and OFF timings of the fourth switch S4 and the fifth switch S5 may be reversed.

  With respect to the method of welding the workpiece at the time of wire electric discharge machining, a case where punching is performed and a case where die plate machining is performed as the mold is manufactured on the workpiece 6 will be described. Here, the details of the machining cycle and the welding cycle in this workpiece cutting and machining method are disclosed in Japanese Patent Application No. 2011-212221, which is a patent application relating to the present applicant, and can be referred to as necessary. Therefore, explanation is omitted here. By the way, in the punching process in the wire electric discharge machine, when the machining member 30 having a predetermined shape is cut out from the workpiece 6, the machining member 30 becomes a material as a product, and the start hole 19 has a machining shape. A workpiece 6 other than 26 is drilled, or a new drill is made at that location. On the other hand, in the die plate processing, a workpiece 30 having a predetermined shape is cut out on the workpiece 6, and the cut workpiece 30 is called a core and becomes a waste product. The start hole 19 is drilled in the machining shape 26, which is a core, or is newly drilled in that place.

  This machining program editing method and machining program editing system for a wire electric discharge machine is, for example, a wire for holding a workpiece so as not to fall from the workpiece by electric discharge machining of the workpiece with electric discharge energy. This is preferable when applied to an electric discharge machine.

5 Wire electrode 6 Workpiece 20 Welded part 21 Processed shape 22 Processed slit 26 Processed member 27 Processed trajectory A Top surface area of processed member G Specific gravity of processed member L Welded length of welded part M Mass of processed member T Thickness of processed member

Claims (9)

The workpiece is subjected to electric discharge machining with discharge energy generated by applying an inter-electrode voltage between the wire electrode and the flat plate-shaped workpiece opposed to the wire electrode to produce a flat plate-shaped machining member and the machining member Editing a machining program for a wire electric discharge machine that is driven and controlled by a controller that captures machining information for holding the machining member on the workpiece at a welding portion where the machining member is welded to the workpiece on the machining locus In the method,
About at least the machining shape of the machining information about the machining member, the thickness of the workpiece, the number of machining members to be electro-discharge machined and the specific gravity of the workpiece, and the welding location of the machining member to the workpiece Import initial conditions into the controller,
Machining the machining member for rough machining the workpiece by analyzing a machining program for producing a flat plate shaped machining member by electric discharge machining the workpiece excluding welding of the machining member to the workpiece. Calculating a peripheral length and an upper surface area of the shape of the processed member, calculating a mass of the processed member from the processed peripheral length of the processed member, the upper surface area, the plate thickness and the specific gravity of the workpiece; Corresponding to the mass of the workpiece from a map of measured values stored in the memory of the controller with respect to the relationship between the mass of the workpiece and the predetermined weld length of the welded portion that can be held on the workpiece of the workpiece A machining program editing method for a wire electric discharge machine, characterized in that a predetermined welding length of the welding portion that can be held on the workpiece by the machining member is calculated.   2. The machining program for a wire electric discharge machine according to claim 1, wherein the welding portion of the machining member to the workpiece is determined as a welding location at least at a final machining location of the machining member. Editing method. To pieces number of welding points entered in the initial condition and the shortest length of the bonded portion one place, from the working perimeter which computed the workpiece, characterized by determining the welding position obtained by equally split A machining program editing method for a wire electric discharge machine according to claim 1 or 2.   In response to the information on the welding location of the welding portion and the welding length, the wire electrode is formed at the predetermined location of the processing member when the workpiece is subjected to electric discharge machining with the wire electrode by the wire electric discharge machine. The machining condition applied between the workpiece and the workpiece is changed from a machining cycle to a welding cycle, and a part of the wire electrode is melted to place the workpiece on the workpiece with a predetermined welding length. A control command to the controller that causes the workpiece to be held by the workpiece by being welded at the welding portion is incorporated into the wire electric discharge machine for machining according to any one of claims 1 to 3 Program editing method.   During the electric discharge machining of the workpiece by the wire electrode, a machining fluid is jetted at a predetermined jet pressure between the workpiece and the wire electrode, and the electric discharge machining is performed from the workpiece of the wire electrode. The wire electric discharge machine according to any one of claims 1 to 4, wherein when the wire electrode is returned along the machining locus of the machining member, the jet pressure of the machining liquid is reduced. Editing program for machining. A confirmation step for detecting whether or not the workpiece is welded to the workpiece at the weld portion after the welding cycle of the workpiece to the workpiece is incorporated in the machining program. A machining program editing method for a wire electric discharge machine according to claim 4 or 5 .   A confirmation step of confirming whether or not the inclination of the processed member with respect to the workpiece is detected by contact of the wire electrode with the processed member at the end of the roughing of the workpiece and whether the wire electrode is held by welding. Is incorporated in the machining program, the machining program editing method for a wire electric discharge machine according to any one of claims 1 to 6. Processing member welding part information for forming the welding portion of the workpiece on the workpiece on the upper, middle and / or lower portions in the plate thickness direction of the workpiece is incorporated in the machining program. The machining program editing method for a wire electric discharge machine according to any one of claims 1 to 7 .   A machining program for reading a machining program for a wire electric discharge machine into a controller of the wire electric discharge machine in order to carry out the machining program editing method for a wire electric discharge machine according to any one of claims 1 to 8. Reading means, display means for displaying the machining program, display means for displaying a machining program incorporating the welding process after editing the machining program, and output for outputting the machining program incorporating the welding process A machining program editing system for a wire electric discharge machine.

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