CN219324846U - Inverted micro-electrolysis wire-cut electric discharge machining device - Google Patents
Inverted micro-electrolysis wire-cut electric discharge machining device Download PDFInfo
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- CN219324846U CN219324846U CN202223177656.XU CN202223177656U CN219324846U CN 219324846 U CN219324846 U CN 219324846U CN 202223177656 U CN202223177656 U CN 202223177656U CN 219324846 U CN219324846 U CN 219324846U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model discloses an inverted micro-electrolysis wire-cut electric discharge machining device, which comprises a lifting shaft, electrode wires and a machining groove, wherein the lifting shaft is connected to a machine tool, and a chuck for clamping a workpiece is arranged below the lifting shaft; electrolyte is filled in the processing tank, two opposite through holes are formed in the upper edge of the processing tank, the electrode wires penetrate through the through holes, and the electrode wires are immersed in the electrolyte in the processing tank; the lifting shaft is positioned right above the electrode wire. The electrode wire is provided with negative voltage, electrolyte in the processing tank is provided with positive voltage, an air film is generated around the electrode wire through electrolytic reaction, spark discharge is generated after the applied voltage reaches the breakdown voltage of the air film, and workpiece materials are removed by high temperature and impact force generated by the spark discharge, so that the workpiece is processed. Because the electrode wire is positioned below the processed workpiece, the etched material falls into the processing groove under the action of gravity, and the problem that the etched material is retained in a narrow kerf on the workpiece and is difficult to clean and discharge is avoided.
Description
Technical Field
The utility model belongs to the technical field of wire cutting, and particularly relates to an inverted micro-electrolysis wire-cut electric discharge machining device.
Background
In order to improve the quality of the machined surface and reduce the machining cost, a new method of micro electrolytic wire cut electric discharge machining (WECDM) has been proposed. The Chinese patent with publication number of CN 208408795U provides an electrolytic electric spark synchronous composite wire cutting machining device, which comprises an electrolyte supply module, an electrolytic tank, a high-voltage pulse power supply, a wire feeding mechanism, a rotating main shaft and a chuck; the wire feeding mechanism comprises a horizontal platform and a wire electrode, wherein the horizontal platform and the wire electrode are arranged in the electrolytic tank, a pair of guide wheels, a rotary damper and a motor are arranged on the horizontal platform, the rotary damper and the motor are oppositely fixed on the horizontal platform, one end of the wire electrode is wound on a rotary shaft of the rotary damper, the other end of the wire electrode bypasses the pair of guide wheels and is then fixed on a rotary shaft of the motor, and the rotary main shaft is positioned above a gap between the pair of guide wheels; the horizontal platform is provided with a liquid spraying electrode, the liquid spraying electrode is provided with a liquid inlet and a liquid spraying opening which are communicated, and the electrolyte supply module is connected with the liquid inlet of the liquid spraying electrode through a conduit; the negative electrode of the high-voltage pulse power supply is electrically connected with the electrode wire, and the positive electrode is electrically connected with the liquid spraying electrode. However, the device is fed and cut horizontally, the wire electrode is fed and cut horizontally, and the etched material stays in the narrow kerf and is not easy to be discharged.
Disclosure of Invention
The utility model aims to provide an inverted micro-electrolysis wire cut electric discharge machining device, which is characterized in that a wire electrode is arranged under a workpiece, the workpiece continuously moves downwards, and etched materials fall into a machining groove under the action of gravity, so that the problem that the etched materials are retained in a narrow kerf on the workpiece and are difficult to clean and discharge is avoided.
The technical scheme for realizing the aim of the utility model is as follows: an inverted micro-electrolysis wire-cut electric discharge machining device comprises a lifting shaft, electrode wires and a machining groove, wherein the lifting shaft is connected to a machine tool, and a chuck for clamping a workpiece is arranged below the lifting shaft; electrolyte is filled in the processing tank, two opposite through holes are formed in the upper edge of the processing tank, the electrode wires penetrate through the through holes, and the electrode wires are immersed in the electrolyte in the processing tank; the lifting shaft is positioned right above the electrode wire.
The chuck on the machine tool lifting shaft is used for fixing a workpiece to be machined to move downwards, the electrode wire is connected with the negative electrode of the power supply, electrolyte in the machining groove is connected with the positive electrode of the power supply, an air film is generated around the electrode wire through electrolytic reaction, spark discharge is generated after the applied voltage reaches the breakdown voltage of the air film, and workpiece materials are removed by high temperature and impact force generated by the spark discharge, so that the workpiece is machined. Because the electrode wire is positioned under the machined workpiece, the etched material falls into the machining groove under the action of gravity, and the problem that the etched material is retained in a narrow cutting seam on the workpiece and is difficult to clean and discharge is avoided.
Further, the processing tank is placed in the liquid receiving tank, the size of the liquid receiving tank is larger than that of the processing tank, and as the upper edge of the processing tank is provided with two opposite through holes, the electrode wire penetrates through the through holes, and the electrolyte in the liquid receiving tank is higher than the electrode wire, part of electrolyte flows out along the outer wall of the processing tank through the through holes, and the liquid receiving tank can collect the flowing electrolyte, so that pollution and waste are avoided.
Further, the bottom of the liquid receiving groove is provided with a liquid discharging hole, the liquid discharging hole is sequentially connected with the filter box and the circulating pump, and the circulating pump is connected with the processing groove through a pipeline. Because the electrode liquid contains the material that erodes after the work piece processing, the rose box can play filterable effect, and the electrolyte after the filtration is got back again in the processing groove under the effect of circulating pump, guarantees the electrolyte height in the processing groove is higher than all the time the wire electrode.
Further, a Y-direction guide rail, a Z-direction guide rail, a first transmission screw, a second transmission screw and a mounting plate are arranged on the machine tool, the Z-direction guide rail is arranged on the Y-direction guide rail in a sliding manner, the first transmission screw is used for driving the Z-direction guide rail to move on the Y-direction guide rail, and a first driving motor is in transmission connection with the first transmission screw; the mounting plate is arranged on the Z-direction guide rail in a sliding manner, the second transmission screw is used for driving the mounting plate to move on the Z-direction guide rail, the second driving motor is in transmission connection with the second transmission screw, and the lifting shaft is fixedly arranged on the mounting plate. The lifting shaft can slide on the Y-direction guide rail and the Z-direction guide rail, so that the workpiece to be processed is driven to move in the horizontal direction and the vertical direction, and the workpiece can be processed into a desired product shape.
Further, the wire storage device also comprises two wire storage cylinders and a wire storage cylinder motor, wherein the two wire storage cylinders are respectively positioned at two sides of the processing groove and used for discharging and collecting the electrode wires. In the processing process, the electrode wire is also worn, the electrode wire is thinned, the processing dimensional accuracy is difficult to ensure, and the problem can be avoided by continuously introducing new electrode wires.
Further, a wire guide wheel is arranged between the wire storage cylinder and the processing groove and used for supporting and guiding the electrode wire.
Further, a tensioning device is further arranged and used for providing tensioning force for the electrode wire and preventing the electrode wire from loosening, so that deviation is caused to the machining precision of a workpiece.
Further, the electrode wire is made of molybdenum wire, and the molybdenum wire is excellent in oxidation resistance and electrolytic corrosion resistance, which is inferior to tungsten wire, because the hardness and melting point of the molybdenum wire are relatively high, but the brittleness of the tungsten wire is higher than that of the molybdenum wire, so that the molybdenum wire is excellent in processing performance in terms of the current metal material.
Further, an auxiliary electrode is arranged in the processing groove, the auxiliary electrode is connected with the positive electrode of the power supply, and the electrode wire is connected with the negative electrode of the power supply. The electrode wire and the auxiliary electrode are subjected to electrolytic reaction in the electrolyte, so that hydrogen is separated out from the periphery of the electrode wire, a gas film is formed to insulate the electrode wire from the electrolyte, the gas film is broken through by spark discharge of the electrolyte on the surface of the electrode wire and the non-conductive workpiece, spark discharge is generated after the applied voltage reaches the breakdown voltage of the gas film, and workpiece materials are removed by high temperature and impact force generated by the spark discharge.
Further, the auxiliary electrode is made of stainless steel, and the auxiliary electrode immersed in the electrolyte is made of stainless steel, so that the auxiliary electrode can be prevented from rusting and can be used for a long time.
By adopting the technical scheme, the utility model has the following beneficial effects: (1) The electrode wire is positioned under the workpiece to be processed, and the etched material falls into the processing groove under the action of gravity, so that the problem that the etched material is retained in a narrow kerf on the workpiece and is difficult to clean and discharge is avoided; (2) The main shaft of the machine tool is provided with a Y-axis and a mounting plate, and the lifting shaft can be adjusted in the horizontal and vertical directions, so that a workpiece to be processed is driven to be processed into a desired product shape; (3) The device is provided with the filter box and the circulating pump, so that electrode liquid can be filtered and returned to the processing tank, and pollution and waste problems are avoided;
(4) The wire guide wheel and the tensioning device can support and guide the wire electrode, tension the wire electrode and ensure the precision of workpiece processing.
Drawings
In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings, in which
FIG. 1 is a front view of a processing apparatus according to the present utility model;
FIG. 2 is a side view of the tooling of the present utility model.
The reference numerals in the drawings are: 1, a silk storage cylinder; 2 rows of wire guide wheels; 3, lifting shafts; 4, electrode wires; 5, processing a groove; 6, liquid receiving groove; 7, a filter box; 8, a circulating pump; 9 pipes; 10 chucks; 11 machine tools; 12 tensioning means; 13, driving a first lead screw; 15 mounting plates; 16Z-direction guide rails; 17Y-direction guide rails; a second drive motor 18; a first drive motor 19; and 20, driving a second lead screw.
Detailed Description
Examples:
as shown in fig. 1-2, the embodiment provides an inverted micro-electrolysis wire-cut electric discharge machining device, which comprises a lifting shaft 3, a wire electrode 4 and a machining groove 5, wherein the lifting shaft 3 is connected to a machine tool 11, and a chuck 10 for clamping a workpiece is arranged below the lifting shaft 3; electrolyte is filled in the processing tank 5, two opposite through holes are formed in the upper edge of the processing tank 5, the electrode wire 4 passes through the through holes, and the electrode wire 4 is immersed in the electrolyte in the processing tank 5; the lifting shaft 3 is positioned right above the electrode wire 4. The chuck 10 on the lifting shaft 3 of the machine tool 11 fixes a workpiece to be processed to move downwards, the electrode wire 4 is connected with the negative electrode of the power supply, electrolyte in the processing groove 5 is connected with the positive electrode of the power supply, an air film is generated around the electrode wire 4 through electrolytic reaction, spark discharge is generated after the applied voltage reaches the breakdown voltage of the air film, and workpiece materials are removed by utilizing high temperature and impact force generated by the spark discharge, so that the workpiece is processed. Because the electrode wire 4 is positioned right below the processing workpiece, the etched material falls into the processing groove 5 under the action of gravity, and the problem that the etched material is retained in a narrow cutting seam on the workpiece and is difficult to clean and discharge is avoided.
The processing groove 5 is placed in the liquid receiving groove 6, the size of the liquid receiving groove 6 is larger than that of the processing groove 5, as the upper edge of the processing groove 5 is provided with two opposite through holes, the electrode wire 4 passes through the through holes, and the electrolyte in the liquid receiving groove 6 is higher than the electrode wire 4, so that part of electrolyte flows out along the outer wall of the processing groove 5 through the through holes, and the liquid receiving groove 6 can collect the flowing electrolyte, so that pollution and waste are avoided.
The bottom of the liquid receiving groove 6 is provided with a liquid discharging hole, the liquid discharging hole is sequentially connected with the filter box 7 and the circulating pump 8, and the circulating pump 8 is connected with the processing groove 5 through a pipeline 9. Because the electrode liquid contains the material etched after the workpiece is processed, the filter box 7 can play a role in filtering, and the filtered electrolyte returns to the processing tank 5 under the action of the circulating pump 8, so that the height of the electrolyte in the processing tank 5 is always higher than that of the electrode wire 4.
The machine tool is provided with a Y-direction guide rail 17, a Z-direction guide rail 16, a first transmission screw rod 13, a second transmission screw rod 20 and a mounting plate 15, wherein the Z-direction guide rail 16 is arranged on the Y-direction guide rail 17 in a sliding manner, the first transmission screw rod 13 is used for driving the Z-direction guide rail 16 to move on the Y-direction guide rail 17, and a first driving motor 19 is in transmission connection with the first transmission screw rod 13; the mounting plate 15 is slidably arranged on the Z-direction guide rail 16, the second transmission screw 20 is used for driving the mounting plate 15 to move on the Z-direction guide rail 16, the second driving motor 18 is in transmission connection with the second transmission screw 20, and the lifting shaft 3 is fixedly arranged on the mounting plate 15. The lifting shaft 3 can slide on the Y-guide rail 17 and the Z-guide rail 16 so as to drive the workpiece to be processed to move in the horizontal direction and the vertical direction, so that the workpiece can be processed into a desired product shape.
The wire storage device also comprises two wire storage cylinders 1 and a wire storage cylinder motor, wherein the two wire storage cylinders 1 are respectively positioned at two sides of the processing groove 5 and used for discharging and collecting the electrode wires 4. During the machining process, the wire electrode 4 is also worn, the wire electrode 4 is thinned, the machining dimensional accuracy is difficult to ensure, and the problem can be avoided by continuously introducing new wire electrode 4. A wire guide wheel 2 is arranged between the wire storage cylinder 1 and the processing groove 5 and is used for supporting and guiding the electrode wire 4. A tensioning device 12 is further arranged for providing tensioning force for the electrode wire 4, preventing the electrode wire 4 from loosening and causing deviation on the machining precision of a workpiece.
The electrode wire 4 is made of molybdenum wire, and the molybdenum wire has high hardness and melting point, good oxidation resistance, and good electrical erosion resistance, which is inferior to tungsten wire, but the brittleness of tungsten wire is higher than that of molybdenum wire, so that the molybdenum wire has good processing performance in terms of the current metal material.
An auxiliary electrode is arranged in the processing groove 5, the auxiliary electrode is connected with the positive electrode of the power supply, and the electrode wire 4 is connected with the negative electrode of the power supply. The electrode wire 4 and the auxiliary electrode generate electrolytic reaction in the electrolyte, so that hydrogen is separated out from the periphery of the electrode wire 4, a gas film is formed to insulate the electrode wire 4 from the electrolyte, the electrolyte on the surface of the non-conductive workpiece generates electric spark discharge to break down a bubble film, the applied voltage reaches the breakdown voltage of the gas film, spark discharge is generated, and the workpiece material is removed by using the high temperature and impact force generated by the spark discharge. The auxiliary electrode is made of stainless steel, and the auxiliary electrode immersed in the electrolyte is made of stainless steel, so that the auxiliary electrode can be prevented from rusting and can be used for a long time.
While the foregoing is directed to embodiments of the present utility model, other and further details of the utility model may be had by the present utility model, it should be understood that the foregoing description is merely illustrative of the present utility model and that no limitations are intended to the scope of the utility model, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the utility model.
Claims (10)
1. The inverted micro-electrolysis wire-cut electric discharge machining device is characterized by comprising a lifting shaft (3), electrode wires (4) and a machining groove (5), wherein the lifting shaft (3) is connected to a machine tool (11), and a chuck (10) for clamping a workpiece is arranged below the lifting shaft (3); electrolyte is filled in the processing tank (5), two opposite through holes are formed in the upper edge of the processing tank (5), the electrode wires (4) penetrate through the through holes, and the electrode wires (4) are immersed in the electrolyte in the processing tank (5); the lifting shaft (3) is positioned right above the electrode wire (4).
2. An inverted micro electrolytic wire cut electric discharge machining device according to claim 1, wherein the machining tank (5) is placed in a liquid receiving tank (6), and the liquid receiving tank (6) is larger in size than the machining tank (5).
3. The inverted micro-electrolysis wire-cut electric discharge machining device according to claim 2, wherein the bottom of the liquid receiving tank (6) is provided with a liquid discharging hole, the liquid discharging hole is sequentially connected with the filter tank (7) and the circulating pump (8), and the circulating pump (8) is connected with the machining tank (5) through a pipeline (9).
4. An inverted micro-electrolysis wire-cut electric discharge machining device according to claim 1, wherein a Y-direction guide rail (17), a Z-direction guide rail (16), a first transmission screw (13), a second transmission screw (20) and a mounting plate (15) are arranged on the machine tool, the Z-direction guide rail (16) is slidably arranged on the Y-direction guide rail (17), the first transmission screw (13) is used for driving the Z-direction guide rail (16) to move on the Y-direction guide rail (17), and a first driving motor (19) is in transmission connection with the first transmission screw (13); the mounting plate (15) is arranged on the Z-direction guide rail (16) in a sliding mode, the second transmission lead screw (20) is used for driving the mounting plate (15) to move on the Z-direction guide rail (16), the second driving motor (18) is in transmission connection with the second transmission lead screw (20), and the lifting shaft (3) is fixedly arranged on the mounting plate (15).
5. An inverted micro-electrolytic wire cut electric discharge machining device according to claim 1, further comprising two wire storage cylinders (1) and a wire storage cylinder motor, the two wire storage cylinders (1) being located on both sides of the machining tank (5) respectively for paying out and collecting the wire electrode (4).
6. An inverted micro-electrolysis wire cut electrical discharge machining device according to claim 5, wherein a traveling wire guide wheel (2) is provided between the wire storage cylinder (1) and the machining tank (5) for supporting and guiding the wire electrode (4).
7. An inverted micro-electrolysis wire cut electrical discharge machining device according to claim 5, further provided with tensioning means (12) for providing a tensioning force to the wire electrode (4).
8. An inverted micro-electrolysis wire cut electrical discharge machining apparatus according to claim 1, wherein the wire electrode (4) is a molybdenum wire.
9. An inverted micro-electrolytic wire cut electric discharge machining apparatus according to claim 1, wherein an auxiliary electrode is installed in the machining tank (5), and the auxiliary electrode is connected to a positive electrode of a power supply; the electrode wire (4) is connected with the negative electrode of the power supply.
10. The inverted micro-electrolysis wire electric discharge machining apparatus according to claim 9, wherein the auxiliary electrode is stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223177656.XU CN219324846U (en) | 2022-11-28 | 2022-11-28 | Inverted micro-electrolysis wire-cut electric discharge machining device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223177656.XU CN219324846U (en) | 2022-11-28 | 2022-11-28 | Inverted micro-electrolysis wire-cut electric discharge machining device |
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| Publication Number | Publication Date |
|---|---|
| CN219324846U true CN219324846U (en) | 2023-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202223177656.XU Active CN219324846U (en) | 2022-11-28 | 2022-11-28 | Inverted micro-electrolysis wire-cut electric discharge machining device |
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| CN (1) | CN219324846U (en) |
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- 2022-11-28 CN CN202223177656.XU patent/CN219324846U/en active Active
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