Electric pulse machining clamp
By designing electrical pulse machining fixtures, the clamping block and driving mechanism are used to make the electrode wires consistently close to the workpiece, the problem of dimensional deviation of the processing of the same batch of workpieces is solved, the accuracy and consistency of batch processing are achieved, and the cost of precision grinding is reduced.
Patent Information
- Application Number
- CN202422321198.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-23
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-09-23
AI Technical Summary
In electrical pulse processing, there is a deviation in the processing size of the workpiece in the same batch, especially when cutting small workpieces such as ceramic ball molds, resulting in inconsistent ceramic ball sizes formed in the batch, which increases the cost of fine grinding.
An electrical pulse machining fixture is adopted, including a first clamping block and a second clamping block. A clamping groove is provided on the clamping block. The upper mold part and the lower mold part are brought close to each other through the driving mechanism to fix the electrode wire and the workpiece, ensuring that the electrode wire is consistently close to the workpiece, and batch processing is realized.
By completing the processing of the same batch of workpieces at one time, the dimensional difference between the workpieces is reduced, the processing accuracy and consistency are improved, and the cost of post-finishing treatment is reduced.
Smart Images
Figure CN223083947U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of electric pulse machining technology, and in particular to an electric pulse machining fixture. Background Art
[0002] Wire cutting machines are commonly used CNC machining machines in China at present. They are based on the principle of electric pulse machining: one end of the pulse power supply is connected to the electrode wire, and the other end is connected to the workpiece to be machined, so that the area to be machined of the workpiece to be machined is located between the positive and negative electrodes, thus forming a strong electric field in the area to be machined. When the pulse power supply is applied, a spark discharge occurs between the electrode wire and the workpiece. The temperature at the moment of discharge is as high as over 10,000 degrees Celsius. The high temperature melts the area to be machined of the workpiece, thereby realizing the cutting machining of the workpiece.
[0003] Among them, the high-speed wire electrical discharge machining machine is a commonly used one. Its electrode wire can be reused, and the electrode wire moves at a high speed back and forth. Generally, the wire moving speed is 8 - 10 m / s. During the machining process, the workpiece is gradually cut out with a notch consistent with the shape of the electrode wire to achieve high-precision machining of the workpiece.
[0004] That is, the shape of the notch finally cut out on the workpiece is consistent with the shape of the electrode wire. However, as the machining progresses, the electrode wire itself will also experience wear, and its shape will change, resulting in a deviation in the size of the finally cut workpiece. If the size of the workpiece to be machined is small, or it is sensitive to the cutting size, for example, when cutting a mold for forming ceramic balls, if the sizes of the molds in the same batch deviate, it will cause a large deviation in the sizes of the ceramic balls formed in the same batch. In actual existing machining, a new electrode wire will be replaced in the later stage of machining to ensure the machining quality. However, there is still a problem of inconsistent machining sizes, resulting in deviations in the ceramic balls of the same batch, increasing the cost of subsequent precision grinding. Summary of the Utility Model
[0005] In order to reduce the size deviation of workpieces in the same batch after electric pulse machining, this application provides an electric pulse machining fixture.
[0006] The electric pulse machining fixture provided by this application adopts the following technical solutions:
[0007] An electric pulse machining fixture includes a first clamping block and a second clamping block; the first clamping block has a clamping surface, and a plurality of first clamping grooves are formed in the clamping surface, the first clamping grooves extend along the thickness direction of the first clamping block, and the plurality of first clamping grooves are arranged at intervals along the length direction of the clamping surface; a plurality of second clamping grooves are formed in the side wall of the second clamping block, the second clamping grooves extend along the thickness direction of the second clamping block, and the plurality of second clamping grooves correspond to the plurality of first clamping grooves one by one; the first clamping block includes an upper die part and a lower die part, and the upper die part is slidably connected to the lower die part along the thickness direction of the lower die part; the first clamping groove includes an upper groove part and a lower groove part, the upper groove part is formed in the upper die part, an electrode wire is connected to the upper die part at the position of the upper groove part, the lower groove part is formed in the lower die part, and the lower groove part is used for the workpiece to abut against; at least one of the upper die part and the lower die part is connected to the output end of a driving mechanism, and the driving mechanism is used to drive the upper die part and the lower die part to approach each other or move away from each other.
[0008] By adopting the above technical solution, during machining, first fix the workpiece between the groove walls of the first clamping groove and the groove walls of the second clamping groove. Then start the driving mechanism to make the upper die part and the lower die part approach each other, that is, make the electrode wire and the workpiece approach each other. When the upper die part and the lower die part abut against each other, input an electric pulse, the electrode wire discharges, and the workpiece is cut. In actual production, the number of electrode wires connected to the upper die part is the same as the number of workpieces to be processed in this batch, so as to complete the processing of the workpieces required for one batch at one time, and reduce the dimensional differences between the workpieces produced in the same batch during electric pulse machining.
[0009] Optionally, there are a plurality of the clamping surfaces; a plurality of the second clamping blocks are provided, and the plurality of second clamping blocks correspond to the plurality of clamping surfaces one by one.
[0010] Optionally, the second clamping block is detachably connected to the first clamping block.
[0011] By adopting the above technical solution, on the one hand, it is convenient to fix the workpiece; on the other hand, it is convenient to process workpieces of different sizes.
[0012] Optionally, the lower die part is connected with a guide rod, and the guide rod extends along the thickness direction of the lower die part; a guide cavity is formed in the upper die part, and the guide cavity extends along the thickness direction of the upper die part, and the guide rod is inserted into the guide cavity.
[0013] By adopting the above technical solution, the sliding connection between the upper die part and the lower die part is realized by the sliding fit of the guide rod and the guide cavity, the structure is simple, the connection is stable, and it helps the alignment of the upper die part and the lower die part, and further helps the alignment of the electrode wire and the workpiece.
[0014] Optionally, an installation cavity is formed in the lower die part, and the guide rod is installed in the installation cavity.
[0015] Optionally, both the first clamping groove and the second clamping groove are arranged in a "V" shape.
[0016] By adopting the above technical solution, the first clamping groove and the second clamping groove can not only stably clamp the workpiece, but also be applicable to workpieces of different sizes. Meanwhile, it is convenient to align the upper die part and the lower die part, and further convenient to align the electrode wire with the workpiece.
[0017] Optionally, a concave notch is formed on the surface of the upper die part facing away from the lower die part; the electrode wire includes a connecting part and an extending part, the connecting part is connected to the bottom of the concave notch; the extending part is connected to the connecting part, the extending part extends along the thickness direction of the upper die part, and the extending part is located between the upper die part and the lower die part.
[0018] By adopting the above technical solution, on the one hand, the extension distance of the electrode wire is reduced, thereby reducing the use of the material of the electrode wire; on the other hand, the heights of the electrode wires are ensured to be consistent, thereby ensuring the consistency of the processing dimensions of the workpiece.
[0019] Optionally, the surface of the lower die part facing the upper die part is used for the surface of the upper die part facing the lower die part to be attached thereto.
[0020] In summary, the present application includes at least one of the following beneficial technical effects:
[0021] 1. By arranging a plurality of electrode wires, all workpieces of the same batch are processed at one time to reduce the difference between the processing dimensions of the workpieces.
[0022] 2. By arranging the guide rod and the guide cavity, the sliding connection between the upper die part and the lower die part is realized, the structure is simple, the connection is stable, and it is convenient to align the upper die part and the lower die part.
[0023] 3. By arranging the concave notch on the upper die part, and the electrode wire includes the connecting part and the extending part, on the one hand, the use of the material of the electrode wire is reduced, and on the other hand, the heights of the plurality of electrode wires are ensured to be consistent. Description of the Drawings
[0024] Figure 1 is a schematic structural diagram of an embodiment of the present application.
[0025] Figure 2 is a schematic structural diagram for showing the connection between the first clamping block and the second clamping block.
[0026] Description of reference numerals: 1. First clamping block; 11. Clamping surface; 12. First clamping groove; 13. Upper die part; 131. Guide cavity; 132. Concave notch; 14. Lower die part; 141. Installation cavity; 15. Guide rod; 16. Electrode wire; 161. Connection part; 162. Extension part; 2. Second clamping block; 21. Second clamping groove; 3. Workpiece. Detailed implementation mode
[0027] The following will further elaborate on this application in conjunction with the attached Figure 1-2 drawings.
[0028] An embodiment of this application discloses an electro - pulse machining fixture. Referring to Figure 1 and Figure 2 , an electro - pulse machining fixture includes a first clamping block 1 and a second clamping block 2. The first clamping block 1 has a clamping surface 11. A plurality of first clamping grooves 12 are formed in the clamping surface 11. The first clamping grooves 12 extend along the thickness direction of the first clamping block 1, and the plurality of first clamping grooves 12 are arranged at intervals along the length direction of the clamping surface 11. A plurality of second clamping grooves 21 are formed in the side wall of the second clamping block 2. The second clamping grooves 21 extend along the thickness direction of the second clamping block 2, and the plurality of second clamping grooves 21 correspond to the plurality of first clamping grooves 12 one by one.
[0029] The first clamping block 1 includes an upper die part 13 and a lower die part 14. The upper die part 13 is slidably connected to the lower die part 14 along the thickness direction of the lower die part 14. The first clamping groove 12 includes an upper groove part and a lower groove part. The upper groove part is formed in the upper die part 13, and the upper die part 13 is connected to the electrode wire 16 at the position of the upper groove part. The lower groove part is formed in the lower die part 14, and the lower groove part is used for the workpiece 3 to abut against. At least one of the upper groove part and the lower groove part is connected to the output end of a driving mechanism, and the driving mechanism is used to drive the upper groove part and the lower groove part to approach or move away from each other.
[0030] During machining, first fix the workpiece 3 between the groove walls of the first clamping groove 12 and the groove walls of the second clamping groove 21. Then start the driving mechanism, so that the upper die part 13 and the lower die part 14 approach each other, that is, the electrode wire 16 and the workpiece 3 approach each other. When the upper die part 13 and the lower die part 14 abut against each other, input an electro - pulse, the electrode wire 16 discharges, and cuts the workpiece 3. In actual production, the number of electrode wires 16 connected to the upper die part 13 is the same as the number of workpieces 3 to be processed in this batch, so as to complete the machining of the workpieces 3 required for one batch at one time, and reduce the dimensional differences between the workpieces 3 produced in the same batch during electro - pulse machining.
[0031] In this embodiment, the upper die part 13 is connected to the output end of the driving mechanism.
[0032] Specifically, the surface of the lower die part 14 facing the upper die part 13 is used for the surface of the upper die part 13 facing the lower die part 14 to fit. In this embodiment, when machining the upper die part 13 and the lower die part 14, the first clamping block 1 formed integrally is first formed, and then the upper die part 13 and the lower die part 14 are cut to make the upper die part 13 and the lower die part 14 have a good fit.
[0033] In this embodiment, there are two clamping surfaces 11, and the two clamping surfaces 11 are respectively the two opposite side walls of the upper die part 13. There are two second clamping blocks 2, and the two second clamping blocks 2 correspond to the two clamping surfaces 11 one by one. It can be understood that in other embodiments, there may be three or more clamping surfaces 11, and three or more second clamping blocks 2 are correspondingly provided to adapt to the number of workpieces 3 to be processed in each batch.
[0034] The first clamping block 1 and the lower die part 14 are detachably connected by bolts. On the one hand, it is convenient for the installation of the workpiece 3, and on the other hand, it is convenient for machining workpieces 3 of different sizes.
[0035] The specific structure of the sliding connection between the upper die part 13 and the lower die part 14 is as follows: the lower die part 14 is connected with a guide rod 15, the guide rod 15 extends along the thickness direction of the lower die part 14, the upper die part 13 is provided with a guide cavity 131, the guide cavity 131 extends along the thickness direction of the upper die part 13, and the guide rod 15 is inserted into the guide cavity 131. Thus, the sliding connection between the upper die part 13 and the lower die part 14 is realized by the sliding fit of the guide rod 15 and the guide cavity 131. The structure is simple, the connection is stable, and it helps the alignment of the upper die part 13 and the lower die part 14, and further helps the alignment of the electrode wire 16 and the workpiece 3.
[0036] It can be understood that there are multiple guide rods 15, and the multiple guide rods 15 are arranged at intervals around the central axis of the lower die part 14.
[0037] In this embodiment, the lower die part 14 is provided with an installation cavity 141, the installation cavity 141 extends along the thickness direction of the lower die part 14, and the lower end of the guide rod 15 is inserted into the installation cavity 141. The guide rod 15 and the lower die part 14 can be fixedly connected or detachably connected. When the guide rod 15 and the lower die part 14 are detachably connected, the guide rod 15 should be fixed to the installation cavity 141 by friction.
[0038] When opening the guide cavity 131 and the installation cavity 141, a communication cavity is first opened in the overall first clamping block 1, and after the first clamping block 1 is cut into the upper die part 13 and the lower die part 14, the communication cavity is divided into the guide cavity 131 and the installation cavity 141.
[0039] The first clamping groove 12 and the second clamping groove 21 are both arranged in a "V" shape, so that the first clamping groove 12 and the second clamping groove 21 can stably clamp the workpiece 3, be applicable to workpieces 3 of different sizes at the same time, and facilitate the alignment of the upper die part 13 and the lower die part 14, and further facilitate the alignment of the electrode wire 16 and the workpiece 3.
[0040] Further, a recessed notch 132 is formed on the surface of the upper die part 13 facing away from the lower die part 14. The electrode wire 16 includes a connecting part 161 and an extending part 162. The connecting part 161 is connected to the bottom of the recessed notch 132. The extending part 162 is connected to the connecting part 161 and extends along the thickness direction of the upper die part 13. The extending part 162 is located between the upper die part 13 and the lower die part 14. On the one hand, this reduces the extending distance of the electrode wire 16, and thus reduces the use of the material of the electrode wire 16; on the other hand, it ensures that the heights of the electrode wires 16 are consistent, and thus ensures that the processing dimensions of the workpiece 3 are consistent.
[0041] The implementation principle of an electric pulse processing fixture according to an embodiment of the present application is as follows: when processing the workpiece 3, loosen the screw for connecting the first clamping block 1 and the lower die part 14, place the plurality of workpieces 3 to be processed into the respective first clamping grooves 12 and second clamping grooves 21 one by one, and then tighten the screw for connecting the first clamping block 1 and the lower die part 14 to complete the clamping and fixing of the workpiece 3. Then start the driving mechanism, use the driving mechanism to drive the upper die part 13 to approach the lower die part 14, that is, make the electrode wire 16 approach the workpiece 3, and then pass a pulsed current to process the workpiece 3.
[0042] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.
Claims
1. An electric pulse machining fixture, characterized in that: It includes a first clamping block and a second clamping block; the first clamping block has a clamping surface, and a plurality of first clamping grooves are formed in the clamping surface. The first clamping grooves extend along the thickness direction of the first clamping block, and the plurality of first clamping grooves are arranged at intervals along the length direction of the clamping surface; a plurality of second clamping grooves are formed in the side wall of the second clamping block. The second clamping grooves extend along the thickness direction of the second clamping block, and the plurality of second clamping grooves correspond to the plurality of first clamping grooves one by one; the first clamping block includes an upper die part and a lower die part, and the upper die part is slidably connected to the lower die part along the thickness direction of the lower die part; the first clamping groove includes an upper groove part and a lower groove part. The upper groove part is formed in the upper die part, and a wire electrode is connected to the upper die part at the position of the upper groove part. The lower groove part is formed in the lower die part, and the lower groove part is used for the workpiece to abut against; at least one of the upper die part and the lower die part is connected to the output end of a driving mechanism, and the driving mechanism is used to drive the upper die part and the lower die part to approach or separate from each other.
2. The electro-pulse machining fixture according to claim 1, characterized in that: There are a plurality of the clamping surfaces; there are a plurality of the second clamping blocks, and the plurality of second clamping blocks correspond to the plurality of clamping surfaces one by one.
3. The electro-pulse machining fixture according to claim 1, characterized in that: The second clamping block is detachably connected to the first clamping block.
4. The electric pulse machining fixture according to claim 1, wherein: The lower die part is connected with a guide rod, and the guide rod extends along the thickness direction of the lower die part; a guide cavity is formed in the upper die part, and the guide cavity extends along the thickness direction of the upper die part, and the guide rod is inserted into the guide cavity.
5. The electro-pulse machining fixture according to claim 4, wherein: An installation cavity is formed in the lower die part, and the guide rod is installed in the installation cavity.
6. The electro-pulse machining fixture according to claim 1, wherein: Both the first clamping groove and the second clamping groove are arranged in a "V" shape.
7. The electro-pulse machining fixture according to claim 1, wherein: A recessed notch is formed in the surface of the upper die part facing away from the lower die part; the wire electrode includes a connecting part and an extending part, and the connecting part is connected to the bottom of the recessed notch; the extending part is connected to the connecting part, and the extending part extends along the thickness direction of the upper die part, and the extending part is located between the upper die part and the lower die part.
8. The electro-pulse machining fixture according to claim 1, wherein: The upper die part and the lower die part are integrally formed first and then cut and separated, and the upper groove part and the lower groove part are formed by one-time cutting. It is characterized in that: the surface of the lower die part facing the upper die part is used for the surface of the upper die part facing the lower die part to fit.