Wire electrical discharge machining system

Abstract

According to an embodiment of the present invention, a wire electric discharge machining system includes a wire electric discharge machine main body that machines an object to be machined by generating an electric discharge between a wire electrode and the object to be machined in a machining liquid stored in a machining tank, the wire electric discharge machining system being provided with: a temperature adjusting device that adjusts the temperature of the object to be machined; the temperature adjusting unit adjusts the working fluid temperature of the working fluid; a temperature sensor that measures the body temperature of the wire electric discharge machine body; and a temperature control device that controls the temperature adjustment device to adjust the working fluid temperature to a target temperature corresponding to the main body temperature.

Description

Technical Field

[0001] The invention relates to a wire electrical discharge machining system. Background Art

[0002] Japanese Patent Laying-Open No. 2012-200854 discloses a wire electrical discharge machine. Summary of the invention

[0003] We look forward to further improving processing accuracy.

[0004] One embodiment of the present invention is a wire EDM system having a wire EDM machine body, which generates discharge between a wire electrode and an object to be processed in a processing fluid stored in a processing tank, thereby processing the object to be processed. The wire EDM system comprises: a temperature regulating device, which regulates the processing fluid temperature of the processing fluid; a temperature sensor, which measures the main body temperature of the wire EDM machine body; and a temperature control device, which controls the temperature regulating device to regulate the processing fluid temperature to a target temperature corresponding to the main body temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] Figure 1 This is a graph showing an example of temperature change corresponding to the main body temperature of the wire electrical discharge machine main body and the room temperature at the time. Figure 2 A wire electrical discharge machining system according to one embodiment is shown. Figure 3 This is a block diagram illustrating the configuration of a temperature control device. Figure 4A , Figure 4B , Figure 4C as well as Figure 4D This is a diagram illustrating an example of how the temperature sensor is mounted on the wire electric discharge machine body. Figure 5 This is a flowchart showing an example of a processing procedure related to temperature control of a machining fluid. Figure 6 This is a diagram showing a case where two temperature sensors are arranged on the main body of the in-line electric discharge machine. Figure 7 This is a flowchart showing an example of a processing procedure related to temperature control of machining fluid in Modification 1. Figure 8 This is a flowchart showing another example of the processing procedure related to the temperature control of the machining fluid in the first modification. Fig. 9 This is a diagram showing a state in which temperature sensors are arranged on the main body of the in-line electric discharge machine in correspondence with a plurality of relative drive mechanisms. Fig.10This is a block diagram illustrating the configuration of a temperature control device. Fig.11 This is a flowchart showing an example of a processing procedure related to temperature control of a machining fluid in Modification 2. DETAILED DESCRIPTION

[0006] The main body temperature of the wire EDM machine body changes as the room temperature of the room where the wire EDM machine body is installed changes. The wire EDM machine body includes components manufactured as castings. The heat capacity of the castings and the air is different. Therefore, when the room temperature changes suddenly, the main body temperature of the wire EDM machine body may not immediately follow the change in the room temperature. In this case, the main body temperature of the wire EDM machine body does not match the room temperature, and a deviation occurs between the two.

[0007] Figure 1 The graphs TR and TM show examples of temperature changes corresponding to the main body temperature of the wire EDM main body and the room temperature. Figure 1 In the example shown, after time C0, as shown by curve TR, the room temperature drops sharply. However, after time C0, as shown by curve TM, there is a time lag before the main body temperature of the wire EDM main body starts to drop. Therefore, after time C0, there is a period when the main body temperature of the wire EDM main body is different from the room temperature.

[0008] In the existing wire EDM system, the working fluid temperature of the working fluid is adjusted to room temperature. The temperature of the workpiece immersed in the working fluid is equal to room temperature. As described above, the main body temperature of the wire EDM machine body that moves the workpiece and the wire electrode relative to each other during EDM is sometimes different from room temperature. The casting included in the wire EDM machine body may be thermally deformed. The wire EDM machine body at a temperature different from room temperature performs EDM while moving the workpiece and the wire electrode at a temperature equal to room temperature relative to each other. Therefore, there is a possibility that the machining accuracy of EDM is reduced.

[0009] Figure 2 The wire discharge machining system 10 of one embodiment is shown. The wire discharge machining system 10 of this embodiment includes a wire discharge machining machine body 20, a machining power source 30, a machining control device 32, and a circulation processing device 40. The machining power source 30 applies a pulse voltage to the inter-electrode formed by the wire electrode E and the machining object W to generate discharge. The wire discharge machining machine body 20 performs discharge machining on the machining object W using the discharge generated between the electrodes.

[0010] The machining control device 32 includes a processor (not shown). The processor executes a machining program stored in a memory (not shown). The machining control device 32 controls the machining power supply 30 to apply a voltage between the electrodes, and controls the wire discharge machining machine body 20 according to the machining program to relatively move the wire electrode E and the machining object W. Thus, the machining object W is subjected to electrical discharge machining.

[0011] The electrical discharge machining performed by the wire electrical discharge machining machine body 20 is performed in a state where the machining object W is immersed in the machining fluid L. The circulation treatment device 40 circulates the machining fluid L in the wire electrical discharge machining system 10 .

[0012] The wire discharge machine body 20 is arranged on the Figure 2 In the XYZ space formed by the X-axis, Y-axis and Z-axis shown in the figure. The X direction in which the X-axis extends, the Y direction in which the Y-axis extends and the Z direction in which the Z-axis extends intersect each other. In the present embodiment, the X-axis, the Y-axis and the Z-axis are orthogonal to each other. The -Z direction is the direction of gravity. The wire discharge machine body 20 has a workpiece table 60. The object W to be processed is supported by the workpiece table 60.

[0013] The wire EDM machine body 20 further includes an upper wire guide 62 and a lower wire guide 64. The upper wire guide 62 supports the wire electrode E above the work stage 60 and the object W (in the +Z direction). The lower wire guide 64 supports the wire electrode E below the work stage 60 (in the −Z direction).

[0014] The wire electrode E is supplied from a bobbin (not shown) in a feeding direction at a predetermined speed. The wire electrode E is fed through the upper wire guide 62, the object W, and the lower wire guide 64. The wire electrode E passing through the lower wire guide 64 is collected by a collection box (not shown).

[0015] During the electrical discharge machining, the machining control device 32 moves the machining object W relative to the wire electrode E along the machining path specified by the machining program. In the present embodiment, the relative movement of the wire electrode E and the machining object W is performed by moving the work table 60 in the X direction and the Y direction. The wire electrical discharge machining machine body 20 also includes an X-axis table 66, a first relative drive mechanism 68, a Y-axis table 70, a second relative drive mechanism 72, a bed 74, and a column 76. In addition, in the present embodiment, the work table 60 is mounted on a machining tank 100 described later, and the machining tank 100 moves in the X direction and the Y direction.

[0016] The X-axis table 66 can move in the X direction relative to the Y-axis table 70, the bed 74, and the column 76. The workpiece table 60 moves in the X direction together with the X-axis table 66. The first relative drive mechanism 68 is driven by the first relative drive mechanism 68, and the X-axis table 66 is moved. The first relative drive mechanism 68 includes, for example, a guide rail, a guide block, a nut, a ball screw, and a motor. The first relative drive mechanism 68 configured in this way moves the wire electrode E and the processing object W relative to each other in the X direction.

[0017] The first relative drive mechanism 68 is supported by a Y-axis table 70. That is, the Y-axis table 70 is a supporting portion of the first relative drive mechanism 68. The Y-axis table 70 can move in the Y direction relative to the bed 74 and the column 76. The X-axis table 66 and the workpiece table 60 move in the Y direction together with the Y-axis table 70.

[0018] The second relative drive mechanism 72 is driven to move the Y-axis table 70. The second relative drive mechanism 72 includes, for example, a guide rail, a guide block, a nut, a ball screw, and a motor. The second relative drive mechanism 72 configured in this way moves the wire electrode E and the object W to be processed in the Y direction.

[0019] The second relative drive mechanism 72 is supported by a bed 74. That is, the bed 74 is a support portion of the second relative drive mechanism 72. The bed 74 is a base of the wire electrical discharge machine body 20. The bed 74 also supports a column 76 erected on the bed 74.

[0020] In the present embodiment, the upper wire guide 62 can move in the X direction and the Y direction during the discharge machining of the object W. The movement of the upper wire guide 62 in the X direction is performed independently of the movement of the work stage 60 in the X direction. Therefore, the movement of the upper wire guide 62 in the X direction is referred to as the movement in the U direction. The movement of the upper wire guide 62 in the Y direction is performed independently of the movement of the work stage 60 in the Y direction. Therefore, the movement of the upper wire guide 62 in the Y direction is referred to as the movement in the V direction. By moving the upper wire guide 62 in the U direction or the V direction, the object W can be tapered.

[0021] The wire EDM machine body 20 includes a Z-axis slide 78, a third relative drive mechanism 80, a U-axis saddle 82, a fourth relative drive mechanism 84, a V-axis saddle 86, and a fifth relative drive mechanism 88. The upper wire guide 62 is mounted on the Z-axis slide 78. The Z-axis slide 78 can move relative to the U-axis saddle 82, the V-axis saddle 86, the bed 74, and the column 76 in the Z direction.

[0022] The upper wire guide 62 moves in the Z direction together with the Z-axis slide 78. The third relative drive mechanism 80 is driven to move the Z-axis slide 78. The third relative drive mechanism 80 includes, for example, a guide rail, a guide block, a nut, a ball screw, and a motor. The third relative drive mechanism 80 configured in this way moves the upper wire guide 62 and the lower wire guide 64 relative to each other in the Z direction.

[0023] The third relative drive mechanism 80 is supported by the U-axis saddle 82. That is, the U-axis saddle 82 is a supporting portion of the third relative drive mechanism 80. The U-axis saddle 82 is movable in the U direction relative to the V-axis saddle 86, the bed 74, and the column 76. The Z-axis slide 78 and the upper wire guide 62 move in the U direction together with the U-axis saddle 82.

[0024] The fourth relative drive mechanism 84 is driven to move the U-axis saddle 82. The fourth relative drive mechanism 84 includes, for example, a guide rail, a guide block, a nut, a ball screw, and a motor. The fourth relative drive mechanism 84 configured in this way moves the upper wire guide 62 and the lower wire guide 64 relative to each other in the U direction (X direction). As a result, the wire electrode E and the object W are relatively moved in the rotation direction centered on the Y axis.

[0025] The fourth relative drive mechanism 84 is supported by the V-axis saddle 86. That is, the V-axis saddle 86 is a supporting portion of the fourth relative drive mechanism 84. The V-axis saddle 86 is movable in the V direction relative to the bed 74 and the column 76. The U-axis slide 82, the Z-axis slide 78, and the upper wire guide 62 move in the V direction together with the V-axis slide 86.

[0026] The fifth relative drive mechanism 88 drives the V-axis saddle 86 to relatively move the V-axis saddle 86. The fifth relative drive mechanism 88 includes, for example, a guide rail, a guide block, a nut, a ball screw, and a motor. The fifth relative drive mechanism 88 configured in this way relatively moves the upper wire guide 62 and the lower wire guide 64 in the V direction (Y direction). As a result, the wire electrode E and the object W to be processed relatively move in the rotation direction centered on the X axis.

[0027] The fifth relative drive mechanism 88 is supported by the column 76 erected on the bed 74. That is, the V-axis saddle 86 is a supporting portion of the column 76.

[0028] The wire EDM body 20 further includes an arm 90 and a machining tank 100. The arm 90 is connected to the column 76 and the lower wire guide 64. That is, the arm 90 supports the lower wire guide 64. The arm 90 supports the wire electrode E via the lower wire guide 64. The arm 90 has a built-in flow path 102 for the machining fluid L to flow in. In addition, the wire electrode E that passes through the lower wire guide 64 is recovered in the arm 90 and is collected in a recovery box (not shown).

[0029] The machining tank 100 can move in the X direction and the Y direction with the movement of the X-axis table 66 and the Y-axis table 70. The machining tank 100 stores a machining fluid L. The workpiece table 60, the object W to be machined, the upper wire guide 62, and the lower wire guide 64 are immersed in the machining fluid L. During the electrical discharge machining, the machining fluid L is ejected from the upper wire guide 62 to the inter-electrode gap. The machining fluid L can also be ejected from the lower wire guide 64 to the inter-electrode gap.

[0030] The circulation treatment device 40 performs a treatment to adjust the temperature of the machining liquid L discharged from the machining tank 100 and returns the machining liquid L to the machining tank 100. The circulation treatment device 40 includes a storage tank 120, a temperature adjustment device 130, a first pump 140, a second pump 142, and a third pump 144. The storage tank 120 stores the machining liquid L discharged from the machining tank 100 via the flow path 102 in the arm 90. The temperature adjustment device 130 adjusts the machining liquid temperature of the machining liquid L by heating or cooling the machining liquid L.

[0031] The first pump 140 supplies the machining fluid L in the storage tank 120 from the storage tank 120 to the temperature adjustment device 130 . The machining fluid L whose temperature is adjusted by the temperature adjustment device 130 returns from the temperature adjustment device 130 to the storage tank 120 .

[0032] As described above, during the electrical discharge machining, the machining fluid L is ejected from the upper wire guide 62 to the inter-electrode gap. The second pump 142 ejects the machining fluid L whose temperature is adjusted by returning to the storage tank 120 from the upper wire guide 62 to the inter-electrode gap, thereby returning to the machining tank 100. The third pump 144 directly returns the machining fluid L whose temperature is adjusted by returning to the storage tank 120 to the machining tank 100.

[0033] The storage tank 120 may also be a clean tank for storing clean machining fluid L. In this case, a contamination tank for storing machining fluid L contaminated by machining chips (sludge) is provided separately from the storage tank 120. The machining fluid L discharged from the machining tank 100 via the flow path 102 in the arm 90 is contaminated, and is therefore recovered in the contamination tank. The machining fluid L recovered in the contamination tank is filtered and purified by machining chips, and then transferred to the storage tank 120 by a pump (not shown). The clean machining fluid L is supplied to the temperature adjustment device 130.

[0034] The wire EDM system 10 further includes a temperature sensor 160. The temperature sensor 160 is disposed on the wire EDM main body 20. The temperature sensor 160 measures the main body temperature of the wire EDM main body 20. The temperature sensor 160 is disposed on a member manufactured as a casting or a relative driving mechanism supported by a member manufactured as a casting among the members included in the wire EDM main body 20.

[0035] The components manufactured as castings are, for example, the X-axis table 66, the Y-axis table 70, the bed 74, the column 76, the U-axis saddle 82, and the V-axis saddle 86. The relative drive mechanisms supported by these components are the first relative drive mechanism 68, the second relative drive mechanism 72, the fourth relative drive mechanism 84, and the fifth relative drive mechanism 88. Therefore, the temperature sensor 160 can be arranged on any one of the X-axis table 66, the first relative drive mechanism 68, the Y-axis table 70, the second relative drive mechanism 72, the bed 74, the column 76, the U-axis saddle 82, the fourth relative drive mechanism 84, the V-axis saddle 86, and the fifth relative drive mechanism 88.

[0036] In this embodiment, the temperature sensor 160 is disposed on the bed 74. A temperature control device 180 for controlling the temperature control device 130 is disposed on the temperature control device 130. Alternatively, the temperature control device 180 may be disposed outside the temperature control device 130 to control the temperature control device 130 through wired communication or wireless communication.

[0037] The temperature control device 180 acquires temperature information of the main body temperature of the wire EDM main body 20 from the temperature sensor 160 via the communication cable 190. The temperature control device 180 controls the temperature adjustment device 130 to adjust the machining fluid temperature of the machining fluid L to a target temperature corresponding to the main body temperature of the wire EDM main body 20. In the present embodiment, the target temperature is equal to the main body temperature of the wire EDM main body 20. The temperature adjustment device 130 adjusts the machining fluid temperature of the machining fluid L to be close to the main body temperature of the wire EDM main body 20.

[0038] Among the components included in the wire EDM main body 20, the temperature of the column 76 made of casting is about the same as the main body temperature of the wire EDM main body 20 measured by the temperature sensor 160 arranged on the bed 74. The temperature of the arm 90 connected to the column 76 is also the same as the main body temperature of the wire EDM main body 20.

[0039] As described above, the machining fluid L in the machining tank 100 is discharged to the storage tank 120 via the flow path 102 in the arm 90. The machining fluid L in the flow path 102 in the arm 90 approaches the temperature of the arm 90 and the column 76. That is, the machining fluid L in the flow path 102 in the arm 90 approaches the main body temperature of the wire electric discharge machine main body 20.

[0040] Figure 32 is a block diagram illustrating the configuration of the temperature control device 180. The temperature control device 180 has a processing circuit 200, a storage device 202, and a communication module 204. The processing circuit 200 includes a processor such as a CPU or a GPU. The storage device 202 includes a volatile memory such as a RAM and a non-volatile memory such as a ROM or a flash memory. The volatile memory is used as a working memory of the processor. The non-volatile memory stores programs executed by the processor and other necessary data. The communication module 204 is used for wired communication or wireless communication.

[0041] The processing circuit 200 includes a temperature information acquisition unit 220, a temperature determination unit 222, and a temperature control unit 224. The temperature information acquisition unit 220, the temperature determination unit 222, and the temperature control unit 224 are implemented by the processing circuit 200 executing a program stored in the storage device 202. At least a part of the temperature information acquisition unit 220, the temperature determination unit 222, and the temperature control unit 224 may also be implemented by an integrated circuit such as an ASIC or an FPGA, or an electronic circuit including discrete devices.

[0042] The temperature information acquisition unit 220 acquires temperature information of the main body temperature of the wire EDM main body 20 from the temperature sensor 160 via the communication module 204. The temperature determination unit 222 determines the above-mentioned target temperature based on the main body temperature of the wire EDM main body 20. The temperature determination unit 222 determines the target temperature to be a temperature equal to the main body temperature of the wire EDM main body 20, for example.

[0043] The temperature control unit 224 controls the temperature adjustment device 130 to adjust the working fluid temperature of the working fluid L supplied from the storage tank 120 to the temperature adjustment device 130 by the first pump 140 to the target temperature. The working fluid L whose working fluid temperature is adjusted to the target temperature is returned to the storage tank 120 and then supplied to the processing tank 100 by the second pump 142 and the third pump 144.

[0044] The work table 60, the object W, the upper wire guide 62, and the lower wire guide 64 are immersed in the machining fluid L whose machining fluid temperature is adjusted to the target temperature. The temperature of the object W immersed in the machining fluid L is adjusted to the target temperature corresponding to the main body temperature of the wire electrical discharge machine main body 20. In addition, the temperatures of the first relative drive mechanism 68, the second relative drive mechanism 72, the third relative drive mechanism 80, the fourth relative drive mechanism 84, and the fifth relative drive mechanism 88 are temperatures corresponding to the main body temperature of the wire electrical discharge machine main body 20. Therefore, it is possible to suppress a decrease in machining accuracy of electrical discharge machining.

[0045] Figure 4A , Figure 4B , Figure 4C as well as Figure 4D1 and 2 are diagrams illustrating an example of how the temperature sensor 160 is mounted on the wire electric discharge machine body 20. As described above, in the present embodiment, the temperature sensor 160 is disposed on the bed 74.

[0046] exist Figure 4A In the example shown, the temperature sensor 160 has a threaded portion 160s and a sensor element 160t. A threaded hole 74a is formed on the surface of the bed 74 as the object to be measured. The temperature sensor 160 is inserted into the threaded hole 74a of the bed 74. The threaded portion 160s of the temperature sensor 160 is screwed into the threaded hole 74a of the bed 74. The sensor element 160t of the temperature sensor 160 is preferably in contact with the bottom surface of the threaded hole 74a of the bed 74. The temperature sensor 160 uses the sensor element 160t to measure the temperature of the bed 74 as the main body temperature of the wire electric discharge machine main body 20.

[0047] When the material constituting the outer surface of the bed 74 as the object to be measured is thin, it is impossible to form a deep screw hole 74a on the surface. Figure 4B In the manner shown, the temperature sensor 160 is mounted on the in-line electrical discharge machine body 20. Figure 4B In the example shown, a block BK is closely attached to the surface of the bed 74. A temperature sensor 160 is attached to the block BK. The sensor element 160t of the temperature sensor 160 is preferably in contact with the block BK. The temperature sensor 160 measures the temperature of the bed 74 as the main body temperature of the wire EDM main body 20 by using the sensor element 160t via the block BK.

[0048] In some cases, a threaded hole is formed in advance on the surface of the bed 74 as the object to be measured for a certain purpose. Figure 4C In the example shown, a threaded hole 74b is formed on the surface of the bed 74. The threaded hole 74b is too large for the insertion of the temperature sensor 160. In this case, a bolt BT is inserted into the threaded hole 74b. The temperature sensor 160 is mounted on the bolt BT. The sensor element 160t of the temperature sensor 160 is preferably in contact with the bolt BT. The temperature sensor 160 measures the temperature of the bed 74 as the main body temperature of the wire electric discharge machine main body 20 by using the sensor element 160t via the bolt BT.

[0049] When the material constituting the outer surface of the bed 74 as the object to be measured is a magnetic body, the temperature sensor 160 can be attached to the in-line electrical discharge machine main body 20 using a magnet. Figure 4DIn the example shown, a magnet MG is provided together with a sensor element 160t on the surface of the temperature sensor 160 in contact with the bed 74. The temperature sensor 160 is mounted on the bed 74 by the magnetic force of the magnet MG. The sensor element 160t of the temperature sensor 160 is preferably in contact with the bed 74. The temperature sensor 160 measures the temperature of the bed 74 as the main body temperature of the wire electric discharge machine main body 20 using the sensor element 160t.

[0050] Figure 5 1 is a flowchart showing an example of a processing sequence related to the temperature control of the machining fluid L. This processing sequence is performed, for example, by the processing circuit 200 included in the temperature control device 180 executing a program stored in the storage device 202. When this processing sequence is started, in step S1, the temperature information acquisition unit 220 acquires temperature information of the main body temperature of the wire electric discharge machine main body 20 from the temperature sensor 160.

[0051] In step S2, the temperature determination unit 222 determines the target temperature to be equal to the main body temperature of the wire EDM main body 20. In step S3, the temperature control unit 224 controls the temperature adjustment device 130 to adjust the machining fluid temperature of the machining fluid L supplied from the storage tank 120 to the temperature adjustment device 130 to the target temperature. When the processing of step S3 is completed, this processing sequence is completed.

[0052] The temperature sensor 160 may be provided on the column 76. The temperature of the column 76 is measured as the main body temperature of the wire EDM main body 20. As described above, the arm 90 is connected to the column 76. The machining fluid L flows in the flow path 102 built in the arm 90. By using the temperature of the column 76, which is about the same temperature as the arm 90 in which the machining fluid L flows, as the main body temperature, the machining fluid temperature of the machining fluid L can be adjusted more appropriately and easily.

[0053] In this embodiment, the temperature control device 180 controls the temperature adjustment device 130 to adjust the machining fluid temperature of the machining fluid L to a target temperature equal to the main body temperature of the wire electric discharge machine main body 20. As a result, the temperature of the machining object W can be brought close to the main body temperature of the wire electric discharge machine main body 20. Therefore, the machining accuracy of the electric discharge machining is high.

[0054] [Modifications] The above-mentioned embodiment may be modified as follows.

[0055] (Variant 1) A plurality of temperature sensors 160 may be disposed on the in-line electric discharge machine body 20 . Figure 6 This is a diagram showing a case where two temperature sensors 160A and 160B are arranged on the in-line electric discharge machine main body 20A. Figure 6The wire discharge machine body 20A shown in FIG. Figure 2 Compared with the wire EDM machine body 20 shown in FIG. 1 , there is no difference except that two temperature sensors 160A and 160B are provided. Figure 6 In the wire discharge machine body 20A shown in FIG. Figure 2 The wire electric discharge machine body 20 shown in the figure has the same components as those given the same reference numerals. The description of the components given the same reference numerals will be omitted.

[0056] The temperature determination unit 222 determines the target temperature based on the main body temperature of the wire electric discharge machine main body 20A acquired from the two temperature sensors 160A and 160B. Figure 6 In the example shown, sunlight SL is irradiated to one side of the wire EDM body 20A. The temperature sensor 160A is not included in the irradiation range of the sunlight SL. The temperature sensor 160B is included in the irradiation range of the sunlight SL. In this case, the body temperature measured by the temperature sensor 160B may be higher than the body temperature measured by the temperature sensor 160A due to solar heat energy.

[0057] exist Figure 6 In the example shown, the relative movement between the wire electrode E and the object W is performed outside the irradiation range of the sunlight SL. It is assumed that the user operates an operating device (not shown) to select the main body temperature acquired from the temperature sensor 160A from among the main body temperature acquired from the temperature sensor 160A and the main body temperature acquired from the temperature sensor 160B.

[0058] In this case, the temperature determination unit 222 determines the main body temperature selected by the user as the target temperature. That is, the main body temperature acquired from the temperature sensor 160A is determined as the target temperature. In addition, the same is true even when one side of the wire EDM main body 20A is not irradiated with sunlight SL but is blown by air from an air conditioner.

[0059] Figure 7 1 is a flowchart showing an example of a processing sequence related to the temperature control of the machining fluid L in the first modification. This processing sequence is performed, for example, by the processing circuit 200 of the temperature control device 180 executing a program stored in the storage device 202. When this processing sequence is started, in step S11, the temperature information acquisition unit 220 acquires temperature information of the main body temperature of the wire electric discharge machine main body 20A from the temperature sensor 160A and the temperature sensor 160B. In step S11, only the main body temperature selected by the user may be acquired.

[0060] In step S12, the temperature determination unit 222 determines the target temperature to be the main body temperature selected by the user. In step S13, the temperature control unit 224 controls the temperature adjustment device 130 to adjust the machining fluid temperature of the machining fluid L supplied from the storage tank 120 to the temperature adjustment device 130 to the target temperature. When the processing of step S13 is completed, this processing sequence is completed.

[0061] The temperature determination unit 222 may determine the target temperature by taking the average value of the main body temperature acquired from the temperature sensor 160A and the main body temperature acquired from the temperature sensor 160B. Figure 8 1 is a flowchart showing another example of a processing sequence related to the temperature control of the machining fluid L in Modification 1. This processing sequence is performed, for example, by the processing circuit 200 included in the temperature control device 180 executing a program stored in the storage device 202. When this processing sequence is started, in step S21, the temperature information acquisition unit 220 acquires temperature information on the main body temperature of the wire electric discharge machine main body 20A from the temperature sensor 160A and the temperature sensor 160B.

[0062] In step S22, the temperature determination unit 222 determines the target temperature as the average of the main body temperature acquired from the temperature sensor 160A and the main body temperature acquired from the temperature sensor 160B. In step S23, the temperature control unit 224 controls the temperature adjustment device 130 to adjust the machining fluid temperature of the machining fluid L supplied from the storage tank 120 to the temperature adjustment device 130 to the target temperature. When the processing of step S23 is completed, this processing sequence is completed.

[0063] In this modification, the temperature determination unit 222 determines the target temperature based on the plurality of body temperatures measured by the plurality of temperature sensors 160A and 160B, respectively. This prevents the temperature of the object W and the body temperature of the wire EDM body 20A from being greatly deviated from each other due to the influence of the installation environment of the wire EDM body 20A. Therefore, the high processing accuracy of the EDM can be maintained.

[0064] (Variant 2) The temperature sensor 160 may also be disposed on the support portion of each relative drive mechanism. The relative movement of the wire electrode E and the object W is achieved by each relative drive mechanism. Therefore, the support portion temperature of the support portion of the relative drive mechanism that performs the relative movement is preferably measured as the main body temperature of the wire EDM main body 20.

[0065] Fig. 9 This is a diagram showing a state in which temperature sensors 160C, 160D, and 160E are arranged in correspondence with a plurality of relative drive mechanisms on an in-line electric discharge machine main body 20B. Fig. 9 The wire discharge machine body 20B shown in FIG. Figure 2 Compared with the wire EDM body 20 shown in FIG. 1 , there is no difference except that three temperature sensors 160C, 160D and 160E are arranged. Fig. 9 In the wire discharge machine body 20B shown in FIG. Figure 2 The wire electric discharge machine body 20 shown in the figure has the same components as those given the same reference numerals. The description of the components given the same reference numerals will be omitted.

[0066] The temperature sensor 160C is arranged at a supporting position of the first relative drive mechanism 68 of the Y-axis table 70. As described above, the Y-axis table 70 is a supporting portion of the first relative drive mechanism 68 that relatively moves the wire electrode E and the object W to be processed in the X direction. Therefore, when the first relative drive mechanism 68 is being driven, the temperature determination unit 222 uses the supporting portion temperature measured by the temperature sensor 160C arranged on the Y-axis table 70 that supports the first relative drive mechanism 68 as the main body temperature. The temperature determination unit 222 determines the main body temperature as the target temperature. That is, the supporting portion temperature acquired from the temperature sensor 160C is determined as the target temperature.

[0067] The temperature sensor 160D is arranged at a supporting position of the second relative drive mechanism 72 of the bed 74. As described above, the bed 74 is a supporting portion of the second relative drive mechanism 72 that moves the wire electrode E and the processing object W relatively in the Y direction. Therefore, when the second relative drive mechanism 72 is being driven, the temperature determination unit 222 uses the supporting portion temperature measured by the temperature sensor 160D arranged on the bed 74 supporting the second relative drive mechanism 72 as the main body temperature. The temperature determination unit 222 determines the main body temperature as the target temperature. That is, the supporting portion temperature acquired from the temperature sensor 160D is determined as the target temperature.

[0068] The temperature sensor 160E is arranged at a supporting position of the fourth relative drive mechanism 84 of the V-axis saddle 86. As described above, the V-axis saddle 86 is a supporting portion of the fourth relative drive mechanism 84, and the fourth relative drive mechanism 84 moves the upper wire guide 62 and the lower wire guide 64 relative to each other in the U direction (X direction). When the fourth relative drive mechanism 84 is driven, the object W is tapered. In this case, the fifth relative drive mechanism 88 is also driven, and the upper wire guide 62 and the lower wire guide 64 are relatively moved in the V direction (Y direction).

[0069] Therefore, when the fourth relative drive mechanism 84 is being driven, the temperature determination unit 222 uses the support portion temperature measured by the temperature sensor 160E disposed on the V-axis saddle 86 as the main body temperature. The temperature determination unit 222 determines the main body temperature as the target temperature. That is, the support portion temperature obtained from the temperature sensor 160E is determined as the target temperature.

[0070] In addition, another temperature sensor may be disposed at a support position of the fifth relative drive mechanism 88 of the column 76. In this case, when the fifth relative drive mechanism 88 is being driven, the temperature determination unit 222 can use the support portion temperature measured by the temperature sensor disposed on the column 76 as the main body temperature.

[0071] Fig.10 It is a block diagram illustrating the configuration of the temperature control device 180A. Fig.10 The temperature control device 180A shown is in Figure 3 The processing circuit 200 of the temperature control device 180 shown in FIG. 1 is obtained by adding a processing cooperation unit 226. Fig.10 In the temperature control device 180A shown in FIG. Figure 3 The components of the temperature control device 180 shown in the figure have the same reference numerals as those in the figure. The description of the components having the same reference numerals as those in the figure will be omitted.

[0072] The processing circuit 200 executes the program stored in the storage device 202 to realize the processing cooperation unit 226. The processing cooperation unit 226 obtains the execution status of the processing program from the processing control device 32 via the communication module 204. When the execution status obtained by the processing cooperation unit 226 indicates that the wire electrode E and the processing object W are relatively moving in the X direction, the temperature determination unit 222 determines the support portion temperature measured by the temperature sensor 160C as the target temperature.

[0073] When the execution status acquired by the processing cooperation unit 226 indicates that the wire electrode E and the processing object W are relatively moving in the Y direction, the temperature determination unit 222 determines the support portion temperature measured by the temperature sensor 160D as the target temperature. When the execution status acquired by the processing cooperation unit 226 indicates that the upper wire guide 62 and the lower wire guide 64 are relatively moving in the U direction (X direction), the temperature determination unit 222 determines the support portion temperature measured by the temperature sensor 160E as the target temperature.

[0074] Fig.111 is a flowchart showing an example of a processing sequence related to the temperature control of the machining fluid L in Modification 2. This processing sequence is performed, for example, by the processing circuit 200 included in the temperature control device 180A executing a program stored in the storage device 202. When this processing sequence is started, in step S31, the machining coordination unit 226 obtains the execution status of the machining program from the machining control device 32.

[0075] In step S32, the temperature information acquisition unit 220 acquires temperature information of the main body temperature of the wire EDM main body 20B from any one of the temperature sensors 160C, 160D, and 160E corresponding to the execution status of the machining program. In step S33, the temperature determination unit 222 determines the target temperature to be the same as the main body temperature of the wire EDM main body 20B. In step S34, the temperature control unit 224 controls the temperature adjustment device 130 to adjust the machining fluid temperature of the machining fluid L supplied from the storage tank 120 to the temperature adjustment device 130 to the target temperature. When the processing of step S34 is completed, this processing sequence is completed.

[0076] In addition, sometimes, multiple relative drive mechanisms among the first relative drive mechanism 68, the second relative drive mechanism 72, and the fourth relative drive mechanism 84 (or the fifth relative drive mechanism 88) are driven simultaneously. In this case, in step S32, the temperature information acquisition unit 220 may also acquire temperature information of the main body temperature of the wire EDM main body 20B from multiple temperature sensors among the temperature sensors 160C, 160D, and 160E. In step S33, the temperature determination unit 222 determines the target temperature based on the multiple main body temperatures obtained from the multiple temperature sensors. For example, the target temperature is determined as the average value of these multiple main body temperatures.

[0077] In this modification, the temperature information acquisition unit 220 acquires the temperature information of the main body temperature of the wire EDM main body 20B according to the execution status of the machining program. This can prevent the temperature of the machining object W and the main body temperature of the wire EDM main body 20B from deviating greatly due to the machining status of the machining object W. Therefore, the machining accuracy of the EDM can be maintained at a high level.

[0078] (Variant 3) The above-mentioned embodiments and modifications may be arbitrarily combined.

[0079] In the above-described embodiment and the modified example, the temperature control device 180 controls the temperature adjustment device 130 to adjust the machining fluid temperature of the machining fluid L to a target temperature corresponding to the main body temperature of the wire electric discharge machine main body 20. This can suppress the deviation between the temperature of the machining object W and the main body temperature of the wire electric discharge machine main body 20. Therefore, the machining accuracy of the electric discharge machining is high.

[0080] The following supplementary notes are disclosed in relation to the above-mentioned embodiment and modified examples.

[0081] (Note 1) The wire EDM system 10 has a wire EDM machine body 20, which generates discharge between the wire electrode E and the processing object W in the processing fluid L stored in the processing tank 100, thereby processing the processing object. The wire EDM system 10 has: a temperature regulating device 130, which regulates the processing fluid temperature of the processing fluid; a temperature sensor 160, which measures the main body temperature of the wire EDM machine body; and a temperature control device 180, which controls the temperature regulating device to regulate the processing fluid temperature to a target temperature corresponding to the main body temperature.

[0082] (Note 2) The wire discharge machining system described in Note 1 may also be provided with a circulation treatment device 40 for performing a prescribed treatment on the machining fluid discharged from the machining tank and returning the machining fluid to the machining tank, wherein the circulation treatment device is provided with the temperature regulating device for regulating the machining fluid temperature of the machining fluid as the prescribed treatment.

[0083] (Note 3) In the wire discharge machining system described in Note 2, the circulation treatment device may also have a storage tank 120 for storing the machining fluid discharged from the machining tank, and the circulation treatment device may return the machining fluid in the storage tank to the machining tank, and supply the machining fluid in the storage tank to the temperature control device so that the machining fluid with the temperature of the machining fluid adjusted is returned to the storage tank.

[0084] (Note 4) In the wire discharge machining system described in any one of Notes 1 to 3, a plurality of temperature sensors may be arranged on the wire discharge machining machine body, and the temperature control device may include a temperature determination unit 222, which determines the target temperature based on a plurality of body temperatures respectively measured by the plurality of temperature sensors; and a temperature control unit 224, which controls the temperature adjustment device to adjust the machining fluid temperature to the target temperature determined by the temperature determination unit.

[0085] (Supplementary Note 5) In the wire electrical discharge machining system according to Supplementary Note 4, the temperature determination unit may determine an average value of a plurality of body temperatures as the target temperature.

[0086] (Supplementary Note 6) In the wire electrical discharge machining system according to Supplementary Note 4, the temperature determination unit may determine the main body temperature selected by a user as the target temperature.

[0087] (Note 7) In the wire discharge machining system described in any one of Notes 1 to 6, the wire discharge machining machine body may include: a relative driving mechanism 68, 72, 84, 88, which causes the wire electrode and the machining object to move relative to each other; and a supporting part 70, 74, 76, 86, which supports the relative driving mechanism, and the temperature sensor is arranged on the supporting part, and the supporting part temperature of the supporting part is measured as the main body temperature.

[0088] (Supplementary Note 8) In the wire discharge machining system described in Supplementary Note 7, it may be that the relative driving mechanism includes: a first driving mechanism 68, which moves one of the wire electrode and the processing object toward a first direction; a second driving mechanism 72, which moves the one of the wire electrode and the processing object toward a second direction intersecting the first direction, and the temperature sensors are respectively arranged in the first driving mechanism and the second driving mechanism, the temperature sensor arranged in the first driving mechanism measures the support part temperature of the support part supporting the first driving mechanism, and the temperature sensor arranged in the second driving mechanism measures the support part temperature of the support part supporting the second driving mechanism, when the first driving mechanism is being driven, the temperature control device at least uses the support part temperature measured by the temperature sensor arranged on the support part supporting the first driving mechanism as the main body temperature, and when the second driving mechanism is being driven, the temperature control device at least uses the support part temperature measured by the temperature sensor arranged on the support part supporting the second driving mechanism as the main body temperature.

[0089] (Note 9) In the wire EDM system described in Note 7 or Note 8, the wire EDM machine body may include an arm 90 for supporting the wire electrode, the arm being connected to the support portion and having a built-in flow path 102 for the machining fluid to flow from the machining tank.

[0090] Although the present invention has been described in detail, the present invention is not limited to the above-mentioned embodiments. These embodiments may be variously added, replaced, changed, partially deleted, etc. without departing from the scope of the main idea of ​​the present invention, or without departing from the scope of the main idea of ​​the present invention derived from the contents recorded in the technical solution and its equivalents. In addition, these embodiments may also be implemented in combination. For example, in the above-mentioned embodiments, the order of each action and the order of each processing are shown as an example, and are not limited thereto. In addition, the same applies to the case where numerical values ​​or mathematical formulas are used in the description of the above-mentioned embodiments. Explanation of symbols

[0091] 10…Wire EDM system 20…Wire EDM machine body 30…Processing power supply 32…Processing control device 40...Circulation processing device 60...Workpiece table 62...upper thread guide 64...lower thread guide 66...X-axis worktable 68...first relative driving mechanism 70...Y-axis worktable 72...Second relative driving mechanism 74…Bed 76…Column 78 ... Z-axis slide 80 ... third relative drive mechanism 82 ... U-axis saddle 84 ... fourth relative drive mechanism 86…V-axis saddle 88…Fifth relative drive mechanism 90...Arm 100...Processing slot 102...flow path 120...storage tank 130 ... Temperature adjustment device 140 ... First pump 142…Second pump 144…Third pump 160...Temperature sensor 180...Temperature control device 190…Communication cable 200…Processing circuit 202 ... storage device 204 ... communication module 220 ... Temperature information acquisition unit 222 ... Temperature determination unit 224 ... Temperature control unit 226 ... Processing cooperation unit.

Claims

1. A wire discharge machining system comprising a wire discharge machining machine body, wherein the wire discharge machining machine body generates discharge between a wire electrode and a machining object in a machining fluid stored in a machining tank, thereby machining the machining object, wherein: have: a temperature regulating device for regulating the processing fluid temperature of the processing fluid; a temperature sensor that measures a main body temperature of the wire electrical discharge machine main body; and A temperature control device controls the temperature adjustment device to adjust the temperature of the machining fluid to a target temperature corresponding to the main body temperature.

2. The wire discharge machining system according to claim 1, characterized in that: A circulation treatment device is further provided, which performs a predetermined treatment on the machining fluid discharged from the machining tank and returns the machining fluid to the machining tank, The circulation treatment device includes the temperature adjustment device, The temperature adjustment device adjusts the machining fluid temperature of the machining fluid as the predetermined process.

3. The wire discharge machining system according to claim 2, characterized in that: The circulation treatment device includes a storage tank for storing the machining fluid discharged from the machining tank. The circulation treatment device returns the machining fluid in the storage tank to the machining tank, and supplies the machining fluid in the storage tank to the temperature adjustment device to return the machining fluid whose temperature has been adjusted to the storage tank.

4. The wire discharge machining system according to any one of claims 1 to 3, characterized in that: A plurality of the temperature sensors are arranged on the wire electrical discharge machine body. The temperature control device comprises: a temperature determination unit that determines the target temperature based on the plurality of body temperatures respectively measured by the plurality of temperature sensors; and A temperature control unit controls the temperature adjustment device to adjust the temperature of the machining fluid to the target temperature determined by the temperature determination unit.

5. The wire discharge machining system according to claim 4, characterized in that: The temperature determination unit determines an average value of the plurality of body temperatures as the target temperature.

6. The wire discharge machining system according to claim 4, characterized in that: The temperature determination unit determines the main body temperature selected by a user as the target temperature.

7. The wire electrical discharge machining system according to any one of claims 1 to 6, characterized in that: The wire discharge machine body comprises: a relative driving mechanism for relatively moving the wire electrode and the object to be processed; and a supporting portion, which supports the relative driving mechanism, The temperature sensor is disposed on the support portion, and measures a support portion temperature of the support portion as the main body temperature.

8. The wire discharge machining system according to claim 7, characterized in that: The relative driving mechanism comprises: a first driving mechanism that moves one of the wire electrode and the object to be processed in a first direction; and a second driving mechanism for moving the one of the wire electrode and the object to be processed toward a second direction intersecting the first direction, The temperature sensors are respectively arranged in the first driving mechanism and the second driving mechanism, The temperature sensor disposed in the first driving mechanism measures the temperature of the supporting portion of the supporting portion supporting the first driving mechanism. The temperature sensor disposed in the second driving mechanism measures the temperature of the supporting portion supporting the second driving mechanism. When the first drive mechanism is being driven, the temperature control device uses at least the support portion temperature measured by the temperature sensor disposed on the support portion supporting the first drive mechanism as the main body temperature. When the second drive mechanism is being driven, the temperature control device uses at least the support portion temperature measured by the temperature sensor disposed on the support portion supporting the second drive mechanism as the main body temperature.

9. The wire discharge machining system according to claim 7 or 8, characterized in that: The wire electrical discharge machine body includes an arm that supports the wire electrode. The arm is connected to the support portion and has a built-in flow path through which the machining fluid flows from the machining tank.

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