A fixture for wire cutting batch clamping

Abstract

The application discloses a kind of clamps for wire cutting batch clamping, belong to the technical field of batch clamp including fixed seat, pressing plate, shaft core;Fixed seat is provided with positioning hole, and the side of positioning hole is dovetail groove, and positioning hole and dovetail groove are communicated arrangement;The end of fixed seat extends outward and is provided with locating plate;Shaft core is arranged in positioning hole, and pressing plate is embedded in dovetail groove and is connected with shaft core screw thread engagement;Control shaft core rotation to drive pressing plate to move up and down, and then make pressing plate and locating plate cooperate and clamp multiple parts simultaneously.The application integrates threaded drive, dovetail guide and batch clamping structure, and the structure is simple and compact, and a single set of tool can realize one-time synchronous clamping of multiple parts, and the operation is simple and efficient, and the loosening operation of all parts can be completed by wrench drive, which effectively reduces the time consumption of manual clamping;And positioning precision is stable and reliable, while occupying small equipment station space, and wire cutting equipment processing stroke can be fully released.

Description

Technical Field

[0001] This invention belongs to the technical field of batch fixtures, specifically relating to a fixture for batch clamping of wire EDM. Background Technology

[0002] In the field of wire EDM (hereinafter referred to as W / C) machining of precision mold parts, the clamping and positioning accuracy, clamping efficiency, and fixture usage cost of the parts directly determine the production efficiency and economic benefits of batch processing of parts, and are the core key factors affecting the wire EDM machining process. At present, the industry generally uses conventional clamping fixtures such as EROWA standard fixtures and small precision vises to complete the positioning and fixing of parts for wire EDM machining of small precision mold parts.

[0003] Existing conventional tooling designs have inherent limitations. Traditional EROWA fixtures and small vises are single-piece clamping structures, meaning a single clamping operation can only position and fix a single mold part, corresponding to wire EDM equipment that can only process a single part. In actual production scenarios, to meet the demand for processing small-sized, high-volume mold standard parts and precision accessories, the industry generally adopts a multi-fixture parallel clamping method to improve processing capacity. This involves simultaneously installing and fixing multiple sets of EROWA fixtures or small vises on the processing station of the wire EDM equipment, and barely achieving simultaneous processing of multiple parts through a step-by-step alignment and independent clamping mode using multiple fixtures.

[0004] However, this traditional operating model has many obvious drawbacks.

[0005] Firstly, the equipment has a high station occupancy rate. The simultaneous assembly of multiple sets of fixtures will occupy a large amount of the effective processing stroke and station space of the wire EDM equipment, which will easily lead to problems such as fixture interference and crowded station layout. This not only limits the number of parts processed in a single operation, but also affects the flexibility and versatility of the equipment.

[0006] Secondly, the clamping operation is cumbersome. Workers need to perform alignment, locking, and calibration operations on each set of fixtures, which greatly increases the clamping time and the intensity of manual operation. The cumbersome clamping process is very easy to cause positioning deviations, resulting in a decrease in the consistency of part processing and an increase in the defect rate.

[0007] Thirdly, the production input costs are extremely high. EROWA fixtures are high-precision standardized tooling, and the cost of purchasing and maintaining a single set is high. Batch configuration of multiple sets of EROWA fixtures will significantly increase the company's tooling equipment investment costs. While small vises are cheaper, their repeatability and clamping stability are poor, which cannot meet the precision requirements of wire EDM machining of precision mold parts, and their adaptability is poor. At the same time, the long-term alternating use and repeated clamping of multiple sets of fixtures will lead to faster wear and tear, further increasing the subsequent maintenance and replacement costs, and greatly reducing the economic efficiency of wire EDM batch machining of mold parts. Summary of the Invention

[0008] The purpose of this invention is to address the above-mentioned shortcomings in the prior art by providing a fixture for batch clamping of wire EDM, thereby solving the problems of conventional fixtures for wire EDM processing, such as inability to perform batch clamping, high tooling investment costs, low clamping efficiency, poor processing consistency, and low equipment utilization.

[0009] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A fixture for batch clamping of wire EDM machines includes a fixed base, a pressure plate, and a shaft. The fixed base has a positioning hole, one side of which is a dovetail groove, and the positioning hole and the dovetail groove are connected. One end of the fixed base extends outward to provide a positioning plate. The shaft is set in the positioning hole, and the pressure plate is embedded in the dovetail groove and threadedly connected to the shaft. The shaft is controlled to rotate to drive the pressure plate to move up and down, thereby enabling the pressure plate and the positioning plate to cooperate to clamp multiple parts simultaneously.

[0010] Furthermore, the bottom of the fixed base is provided with a pressure-bearing step, and a positioning hole for accommodating the shaft core is provided on the pressure-bearing step; the top of the fixed base is provided with an operating port, which communicates with the positioning hole.

[0011] Furthermore, a dovetail groove is formed on the edge of the fixing base in the vertical direction, and a first rectangular groove and a second rectangular groove are formed on the two opposite surfaces of the dovetail groove; the first rectangular groove connects the positioning hole and the dovetail groove; the top of the second rectangular groove is open and located at the edge of the fixing base.

[0012] Furthermore, the positioning plate is disposed on one end of the fixed base near the second rectangular groove; and the top surface of the positioning plate and the bottom of the second rectangular groove are located on the same horizontal plane.

[0013] Furthermore, the outer surface of the shaft core has a spiral thread structure, and a flange boss is provided on its top. A drive hole is opened on the top of the flange boss. The shaft core is located in the positioning hole, and part of the thread structure of the shaft core is exposed outward through the first rectangular groove. The flange boss on the top of the shaft core is located in the operating port on the top of the fixed seat.

[0014] Furthermore, the pressure-bearing step is provided with multiple screw holes, and a top block is provided on the pressure-bearing step and fixed by bolts cooperating with the screw holes; the top block is used to support the shaft core.

[0015] Furthermore, the pressure plate includes an integrated support member and a clamping member. The clamping member is located on the top of the support member and extends outward. The clamping member has a plate-like structure with a flat clamping surface at its bottom. The cross-section of the support member is a dovetail structure, and an arc-shaped groove is provided on the side away from the clamping member. The arc-shaped groove runs vertically through the entire support member.

[0016] Furthermore, the support member of the pressure plate is embedded in the dovetail groove on the fixed seat, the clamping member is located in the second rectangular groove and can move up and down along the second rectangular groove, and the clamping surface at the bottom of the clamping member cooperates with the horizontal surface at the top of the positioning plate, so as to realize the clamping and release of multiple parts at the same time.

[0017] Furthermore, the support member is embedded in the dovetail groove on the fixed seat, and the arc-shaped groove on the back of the support member is engaged with the partially exposed shaft thread; by cooperating with the wrench and the drive hole, the shaft is driven to rotate, thereby driving the clamping member on the pressure plate to move up and down, so as to simultaneously release and clamp multiple parts.

[0018] The fixture for batch clamping of wire EDM provided by this invention has the following beneficial effects: This invention's fixture can simultaneously clamp and position multiple small mold parts using only a single set of fixed base, pressure plate, and threaded transmission assembly, eliminating the need for multiple EROWA fixtures or small vises at the online cutting station. This saves on the expense of multiple high-precision EROWA fixtures, resulting in a smaller overall tooling component and a simplified structure. Only the top block is a wear-prone pressure-bearing component; it can be replaced individually after wear, without requiring a complete replacement of the fixture base. This significantly reduces tooling maintenance and consumable costs over long-term use.

[0019] This invention's fixture utilizes the linkage between a dovetail groove and a threaded pair to achieve vertical lifting and lowering of the pressure plate. A wrench-driven shaft allows for simultaneous clamping and loosening of multiple parts, replacing the need for multiple clamps and separate locking and calibration processes in a single operation, significantly reducing clamping time. The dovetail groove limits the pressure plate to vertical sliding only, preventing horizontal offset; the top block bears all axial clamping loads, preventing deformation of the fixed base under pressure, ensuring consistent positioning references for each clamping operation, high dimensional consistency across multiple parts, and consistently meeting the precision requirements of wire EDM machining.

[0020] This invention's structure occupies only the installation space of a single station of wire EDM equipment, avoiding interference from multiple fixtures and minimizing the machining stroke, thus preserving the equipment's effective machining stroke. Multiple parts can be fixed simultaneously in a single clamping operation, and the equipment can produce workpieces in batches with a single wire feed cycle, reducing the frequency of material changes during standby. The overall structure is compact and suitable for batch processing of various small and medium-sized mold parts. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a fixture used for batch clamping of wire EDM in the embodiment. Figure 1 .

[0022] Figure 2 This is a schematic diagram of a fixture used for batch clamping of wire EDM in the embodiment. Figure 2 .

[0023] Figure 3This is a schematic diagram of the mounting bracket in the embodiment. Figure 1 .

[0024] Figure 4 This is a schematic diagram of the mounting bracket in the embodiment. Figure 2 .

[0025] Figure 5 This is a schematic diagram of the mounting bracket in the embodiment. Figure 3 .

[0026] Figure 6 This is a schematic diagram of the pressure plate in the embodiment. Figure 1 .

[0027] Figure 7 This is a schematic diagram of the pressure plate in the embodiment. Figure 2 .

[0028] Figure 8 This is a schematic diagram of the shaft core in the embodiment.

[0029] Figure 9 This is a schematic diagram of the top block in the embodiment.

[0030] Among them, 1. fixed base; 11. operating port; 12. dovetail groove; 13. positioning hole; 14. positioning plate; 15. pressure-bearing step; 16. screw hole; 2. Pressure plate; 21. Support component; 22. Clamping component; 23. Arc groove; 3. Shaft core; 31. Flange boss; 32. Drive hole; 4. Wrench; 5. Part; 6. Top block. Detailed Implementation

[0031] The specific embodiments of the present invention are described below to enable those skilled in the art to understand the present invention. However, it should be understood that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, various changes are obvious as long as they are within the spirit and scope of the present invention as defined and determined by the appended claims. All inventions utilizing the concept of the present invention are protected.

[0032] This embodiment provides a fixture for batch clamping of wire EDM parts. It integrates thread drive, dovetail guide, and batch clamping structure into one unit. The structure is simple and compact; a single fixture can achieve simultaneous clamping of multiple parts 5 at once. Operation is simple and efficient; the wrench 4 alone can complete the unclamping operation of all parts 5. (See reference...) Figure 1 river Figure 2 Specifically, it includes: Fixed base 1, pressure plate 2, shaft core 3 and top block 6; In some embodiments, the fixing base 1 has a positioning hole 13, one side of which is a dovetail groove 12, and the positioning hole 13 and the dovetail groove 12 are arranged in communication. One end of the fixing base 1 extends outward to provide a positioning plate 14, which is used to place multiple parts 5, such as... Figure 1 As shown, part 5 has an L-shaped structure; the shaft core 3 is set in the positioning hole 13, and the pressure plate 2 is embedded in the dovetail groove 12 and threadedly connected to the shaft core 3; the shaft core 3 is controlled to rotate to drive the pressure plate 2 to move up and down, so that the pressure plate 2 and the positioning plate 14 cooperate to clamp multiple parts 5 at the same time.

[0033] In one specific embodiment, reference is made to Figures 3-5 The bottom of the fixed base 1 has a pressure-bearing step 15, and a positioning hole 13 for accommodating the shaft core 3 is formed on the pressure-bearing step 15. The top of the fixed base 1 has an operating port 11, which communicates with the positioning hole 13. Multiple screw holes 16 are formed on the pressure-bearing step 15. The top block 6 is placed on the pressure-bearing step 15 and fixed by bolts engaging with the screw holes 16. The top block 6 is used to support the shaft core 3. Figure 9 As shown.

[0034] In one specific embodiment, reference is made to Figures 3-5 The edge of the fixed base 1 is provided with a dovetail groove 12 in the vertical direction. The two opposite surfaces of the dovetail groove 12 are respectively provided with a first rectangular groove and a second rectangular groove. The first rectangular groove connects the positioning hole 13 and the dovetail groove 12. The top of the second rectangular groove is open and located at the edge of the fixed base 1. The top opening of the second rectangular groove facilitates the sliding of the support member 21.

[0035] In one specific embodiment, the positioning plate 14 is disposed on the fixed base 1 near one end of the second rectangular groove; and the top surface of the positioning plate 14 and the bottom of the second rectangular groove are located on the same horizontal plane. This design allows for better clamping of multiple parts 5.

[0036] In one specific embodiment, reference is made to Figure 8 The outer surface of the shaft core 3 has a spiral thread structure, and a flange boss 31 is provided on its top. A drive hole 32 is opened on the top of the flange boss 31. The drive hole 32 is a regular hexagon. A wrench 4 is inserted into it to drive the shaft core 3 to rotate. The shaft core 3 is located in the positioning hole 13. Part of the thread structure of the shaft core 3 is exposed outward through the first rectangular groove. The exposed thread structure is threadedly connected to the pressure plate 2 to drive the pressure plate 2 to move up and down, thereby realizing the clamping and release of the part 5. The flange boss 31 on the top of the shaft core 3 is located in the operating port 11 on the top of the fixed seat 1.

[0037] In one specific embodiment, reference is made to Figure 6 and Figure 7The pressure plate 2 includes an integrated support member 21 and a clamping member 22. The clamping member 22 is located on the top of the support member 21 and extends outward. The clamping member 22 has a plate-like structure with a flat clamping surface at the bottom. The cross-section of the support member 21 is a dovetail structure, and an arc-shaped groove 23 is provided on the side away from the clamping member 22. The arc-shaped groove 23 runs through the entire support member 21 in a vertical direction.

[0038] In one specific embodiment, reference is made to Figure 6 and Figure 7 The support member 21 of the pressure plate 2 is embedded in the dovetail groove 12 on the fixed seat 1. The clamping member 22 is located in the second rectangular groove and can move up and down along the second rectangular groove. The clamping surface at the bottom of the clamping member 22 cooperates with the horizontal surface at the top of the positioning plate 14, so as to realize the clamping and release of multiple parts 5 at the same time.

[0039] In one specific embodiment, the support member 21 is embedded in the dovetail groove 12 on the fixed base 1, and the arc groove 23 on the back of the support member 21 is threadedly engaged with the partially exposed shaft core 3; by the cooperation of the wrench 4 and the drive hole 32, the shaft core 3 is driven to rotate, thereby driving the clamping member 22 on the pressure plate 2 to move up and down, so as to simultaneously release and clamp multiple parts 5.

[0040] The working principle of this embodiment is as follows: Insert the shaft core 3 from below the positioning hole 13, place the top block 6 in the pressure-bearing step 15, and fix the top block 6 with bolts. Simultaneously, the flange boss 31 on the shaft core 3 protrudes through the operating hole at the top of the fixing seat 1. Then, insert the support member 21 of the pressure plate 2 from the dovetail groove 12 and thread it to the partially exposed shaft core 3. During clamping, place a batch of small parts 5 on the positioning plate 14, and rotate the drive hole 32 using the wrench 4 to rotate the shaft core 3, thereby moving the clamping member 22 downwards until all parts 5 are securely clamped. After the wire machining is completed, rotate the wrench 4 in the opposite direction to move the clamping member upwards, and the machined parts 5 can be removed.

[0041] Although specific embodiments of the invention have been described in detail with reference to the accompanying drawings, this should not be construed as limiting the scope of protection of this patent. Various modifications and variations that can be made by a person skilled in the art without inventive effort within the scope described in the claims still fall within the scope of protection of this patent.

Claims

1. A fixture for batch clamping of wire EDM machines, characterized in that, Includes a mounting base, pressure plate, and shaft. The fixed base has a positioning hole, one side of which is a dovetail groove, and the positioning hole and the dovetail groove are connected. One end of the fixed base extends outward to provide a positioning plate. The shaft is set in the positioning hole, and the pressure plate is embedded in the dovetail groove and threadedly connected to the shaft. The shaft is controlled to rotate to drive the pressure plate to move up and down, thereby enabling the pressure plate and the positioning plate to cooperate to clamp multiple parts simultaneously.

2. The fixture for batch clamping of wire EDM according to claim 1, characterized in that, The bottom of the fixed base is provided with a pressure-bearing step, and a positioning hole for accommodating the shaft core is provided on the pressure-bearing step; the top of the fixed base is provided with an operating port, which communicates with the positioning hole.

3. The fixture for batch clamping of wire EDM according to claim 2, characterized in that, The fixed base has a dovetail groove on its edge in the vertical direction, and a first rectangular groove and a second rectangular groove are respectively formed on the two opposite surfaces of the dovetail groove; the first rectangular groove connects the positioning hole and the dovetail groove; the second rectangular groove has an opening at the top and is located at the edge of the fixed base.

4. The fixture for batch clamping of wire EDM according to claim 3, characterized in that, The positioning plate is disposed on one end of the fixed base near the second rectangular groove; and the top surface of the positioning plate and the bottom of the second rectangular groove are on the same horizontal plane.

5. The fixture for batch clamping of wire EDM according to claim 3, characterized in that, The shaft core has a spiral thread structure on the outside and a flange boss on its top. A drive hole is opened on the top of the flange boss. The shaft core is located in the positioning hole, and part of the thread structure of the shaft core is exposed outward through the first rectangular groove. The flange boss on the top of the shaft core is located in the operating port on the top of the fixed seat.

6. The fixture for batch clamping of wire EDM according to claim 2, characterized in that, The pressure-bearing step has multiple screw holes, and a top block is provided on the pressure-bearing step. The top block is fixed by bolts that cooperate with the screw holes. The top block is used to support the shaft core.

7. The fixture for batch clamping of wire EDM according to claim 5, characterized in that, The pressure plate includes an integrated support member and a clamping member. The clamping member is located on the top of the support member and extends outward. The clamping member has a plate-like structure with a flat clamping surface at the bottom. The support member has a dovetail cross-section with an arc-shaped groove on the side away from the clamping member. The arc-shaped groove runs vertically through the entire support member.

8. The fixture for batch clamping of wire EDM according to claim 7, characterized in that, The support member of the pressure plate is embedded in the dovetail groove on the fixed seat. The clamping member is located in the second rectangular groove and can move up and down along the second rectangular groove. The clamping surface at the bottom of the clamping member cooperates with the horizontal surface at the top of the positioning plate, so as to realize the clamping and release of multiple parts at the same time.

9. The fixture for batch clamping of wire EDM according to claim 8, characterized in that, The support is embedded in the dovetail groove on the fixed base, and the arc groove on the back of the support engages with the partially exposed shaft thread. By cooperating with the wrench and the drive hole, the shaft is driven to rotate, which in turn drives the clamping parts on the pressure plate to move up and down, so as to simultaneously release and clamp multiple parts.

Images