Multi-station adjustable positioning clamping fixture for CNC machining of copper bush

Abstract

This utility model discloses a multi-station adjustable positioning and clamping fixture for CNC machining of copper electrodes, relating to the field of copper electrode positioning and clamping. It includes a CNC worktable, with fixed plates on both sides of the top of the CNC worktable. An array of mounting blocks is arranged inside the top of the CNC worktable, with fixing screws threaded into the mounting blocks. A base is fixedly mounted on the top of the fixed plates, and guide rails are fixedly mounted on both sides of the top of the base. This utility model, by setting multiple sets of movable bases and dimension scale fixing blocks on the base, places the copper electrode workpiece to be machined on the movable bases and the top of the dimension scale fixing blocks. The clamping blocks are used to clamp and fix the workpiece, allowing the positioning and clamping fixture to simultaneously clamp multiple workpieces of different lengths and widths. The fixture is simple, reduces the time spent on frequent manual workpiece changes and coordinate calibration, and improves work efficiency.

Description

Technical Field

[0001] This utility model relates to copper electrode positioning and clamping technology, specifically to a multi-station adjustable positioning and clamping fixture for CNC machining of copper electrodes. Background Technology

[0002] In CNC machining of copper electrodes (electrical discharge machining electrodes), clamping and positioning are crucial factors affecting machining efficiency and accuracy. As the core tool in electrical discharge machining, the copper electrode needs to be machined into various sizes (e.g., length 50-200mm, width 30-150mm) according to different mold cavity requirements, and the machining accuracy requirements are extremely high (usually controlled within ±0.01mm). This places strict demands on the adaptability and stability of the clamping fixture. However, existing clamping methods for CNC machining of copper electrodes still have many technical limitations, making it difficult to meet the needs of mass production and flexible machining.

[0003] Traditional copper electrode clamping often employs a "single-station fixed fixture," meaning one fixture can only accommodate one size of copper electrode workpiece. These fixtures typically achieve positioning through pre-set fixed blocks and bolt clamping structures. When machining copper electrodes of different lengths and widths, the original blocks must be manually removed, the fixture spacing adjusted, and reinstalled and calibrated—a process that is not only cumbersome but also consumes significant time for "alignment and centering": operators must use dial indicators, centering rods, and other tools to manually adjust the copper electrode's position to ensure its center aligns with the CNC machine tool spindle center. Clamping and calibration time for a single workpiece typically takes 5-10 minutes. In scenarios involving batch machining of copper electrodes of various sizes, frequent fixture changes and repeated alignment and centering severely compress the machine tool's effective machining time, significantly reducing production efficiency. Furthermore, the repetitive nature of manual operation easily introduces errors, increasing the risk of exceeding machining accuracy tolerances. Utility Model Content

[0004] The purpose of this invention is to provide a multi-station adjustable positioning clamping fixture for CNC machining of copper electrodes, so as to solve the problem that traditional copper electrode clamping requires one-by-one centering when machining copper electrode workpieces of various sizes and specifications, which affects work efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-station adjustable positioning and clamping fixture for CNC machining of copper electrodes, comprising a CNC worktable, fixed plates on both sides of the top of the CNC worktable, mounting blocks arranged in an array inside the top of the CNC worktable, fixing screws fixedly installed inside the mounting blocks by threads, a base fixedly installed on the top of the fixed plates, guide rails fixedly installed on both sides of the top of the base, a movable base movably installed on the top of the base, dimension scale fixing blocks linearly and equidistantly fixed on the top of the base, a copper electrode disposed on the top of the base, and a clamping block movably installed on the top of the movable base.

[0006] Furthermore, the size scale fixing block is linearly and equidistantly fixed with pins inside, the size scale fixing block is linearly and equidistantly fixed with mounting screws inside, the base is provided with mounting holes in an array inside, and the movable base has U-shaped grooves inside both ends.

[0007] Furthermore, the top of the base is provided with a flat-head screw, the interior of the movable base is provided with flat-head screw head holes at equal intervals, the interior of the clamping block is provided with threaded holes at equal intervals, and the interior of the U-shaped groove is provided with a U-shaped groove screw.

[0008] Furthermore, the mounting block and the fixing plate are fixedly installed by fixing screws, and the bottom of the movable base is provided with a sliding groove that is adapted to the guide rail. One end of the guide rail passes through the movable base and extends to the outside of the movable base.

[0009] Furthermore, the size scale fixing block and the base are fixedly installed by mounting screws, and the bottom end of the pin passes through the size scale fixing block and the base in sequence, and the bottom end of the pin extends into the interior of the base.

[0010] Furthermore, a U-shaped groove screw is fixedly installed inside the mounting hole by means of threads, and the flat head screw is set inside the thread hole, and the flat head screw is adapted to the flat head screw head hole.

[0011] Compared with existing technologies, this utility model provides a multi-station adjustable positioning and clamping fixture for CNC machining of copper electrodes. It has the following advantages:

[0012] This utility model sets multiple sets of movable bases and size scale fixing blocks on the base. The copper electrode workpiece to be processed is placed on the top of the movable bases and size scale fixing blocks. The clamping block is used to clamp and fix the workpiece, so that the positioning clamp can clamp multiple workpieces of different lengths and widths at the same time. The tooling is simple, reduces the time for frequent manual workpiece replacement and calibration of centering and finding coordinates, and improves work efficiency. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0014] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0015] Figure 2 This is a structural view of the present invention without the workpiece clamped.

[0016] Figure 3 This is a structural view of the base of this utility model;

[0017] Figure 4 This is a top view of the workpiece when it is clamped.

[0018] Figure 5 This is a front view of the workpiece when it is clamped.

[0019] Figure 6 This is a structural view of the flat-head screw head hole and the thread hole of this utility model;

[0020] Figure 7 This is a reference diagram for the automatic material nesting of the programming software of this utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. CNC worktable; 2. Fixing plate; 3. Mounting block; 4. Fixing screw; 5. Base; 6. Guide rail; 7. Movable base; 8. Dimension scale fixing block; 9. Pin; 10. Mounting screw; 11. Mounting hole; 12. Copper electrode; 13. Clamping block; 14. U-slot; 15. Flat head screw; 16. Flat head screw head hole; 17. Thread hole; 18. U-slot screw. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0024] As attached Figure 1 To be continued Figure 7 As shown:

[0025] Example 1:

[0026] This utility model provides a multi-station adjustable positioning and clamping fixture for CNC machining of copper electrodes, including a CNC worktable 1, fixed plates 2 on both sides of the top of the CNC worktable 1, mounting blocks 3 arranged in an array inside the top of the CNC worktable 1, fixing screws 4 fixedly installed inside the mounting blocks 3 by threads, a base 5 fixedly installed on the top of the fixed plates 2, guide rails 6 fixedly installed on both sides of the top of the base 5, a movable base 7 movably installed on the top of the base 5, dimension scale fixing blocks 8 linearly and equidistantly fixed on the top of the base 5, a copper electrode 12 on the top of the base 5, and a clamping block 13 movably installed on the top of the movable base 7.

[0027] The size scale fixing block 8 is fixedly installed with pins 9 at linear equidistant intervals inside, and mounting screws 10 are fixedly installed with mounting screws 10 at linear equidistant intervals inside. The base 5 has mounting holes 11 arranged in an array inside. The movable base 7 has U-shaped grooves 14 inside at both ends. The top of the base 5 is provided with flat-head screws 15. The movable base 7 has flat-head screw head holes 16 at linear equidistant intervals inside. The clamping block 13 has threaded holes 17 at linear equidistant intervals inside. The U-shaped groove 14 is provided with U-shaped groove screws 18 inside.

[0028] Working principle: The top of the base 5 is linearly and equidistantly arranged with size scale fixing blocks 8. The size scale fixing blocks 8 are fixedly installed to the base 5 by mounting screws 10. The top of the base 5 is arranged with mounting holes 11. The top of the base 5 is fixedly installed with guide rails 6. The movable base 7 is movably installed on the top of the base 5 through the guide rails 6. The distance between the movable base 7 and the size scale fixing blocks 8 can be adjusted according to the actual size and width of the copper electrode 12. Then, the U-shaped groove screw 18 is inserted into the U-shaped groove 14 opened in the movable base 7. The bottom end of the U-shaped groove screw 18 is fixedly installed with the mounting hole 11 by threads. The position of the movable base 7 on the base 5 is fixed. The clamping block 13 is set on the top of the movable base 7. The clamping block 13 has through grooves opened at both ends. The size of the through grooves is larger than that of the U-shaped groove 14. Since the top of the base 5 is provided with multiple guide rails 6 and multiple sets of movable bases 7, different size types of combinations (i.e., the distance arrangement between the size scale fixing blocks 8 and the movable base 7) can be set on the base 5 to clamp and fix copper electrodes 12 of various sizes at the same time.

[0029] Example 2:

[0030] Based on Embodiment 1, the mounting block 3 and the fixing plate 2 are fixedly installed by fixing screws 4. The bottom of the movable base 7 is provided with a sliding groove, which is adapted to the guide rail 6. One end of the guide rail 6 passes through the movable base 7 and extends to the outside of the movable base 7. The size scale fixing block 8 and the base 5 are fixedly installed by mounting screws 10. The bottom end of the pin 9 passes through the size scale fixing block 8 and the base 5 in sequence, and the bottom end of the pin 9 extends into the interior of the base 5. The U-shaped groove screw 18 is fixedly installed in the mounting hole 11 by threads. The flat head screw 15 is set in the thread hole 17 and is adapted to the flat head screw head hole 16.

[0031] Working principle: Place the copper electrode 12 on top of the base 5. Place the bottom two sides of the copper electrode 12 on one side of the top of the size scale fixing block 8 and the top of the movable base 7, respectively. One side of the copper electrode 12 is in contact with the size scale fixing block 8, and the other side of the copper electrode 12 is in contact with the clamping block 13. The eccentricity between the flat head screw hole 16 and the thread hole 17 is 1mm. When the flat head screw 15 is screwed into the flat head screw hole 16, the clamping block 13 will clamp the copper electrode 12 with force towards the center of the copper electrode 12. It should be noted that when clamping and fixing the copper electrode 12, one end of the copper electrode 12 needs to be aligned with one end of the size scale fixing block 8 in order to measure the length.

[0032] Simply align and clamp the CNC-machined copper electrode in the multi-station position, then fix it on the CNC worktable 1, ensuring the fixture's coordinates match the coordinates in the programming drawing. (e.g.) Figure 7 (As shown, for reference only) The copper electrode 12 to be processed only needs to be placed within the specified size scale to be programmed for processing, saving the time of calibrating and centering each copper electrode 12 and greatly improving work efficiency.

[0033] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A multi-station adjustable positioning and clamping fixture for CNC machining of copper electrodes, comprising a CNC worktable (1), characterized in that, The CNC worktable (1) has fixed plates (2) on both sides of its top. The CNC worktable (1) has mounting blocks (3) arranged in an array inside its top. The mounting blocks (3) are fixed with screws (4) by threads. The fixed plate (2) has a base (5) fixedly installed on its top. The base (5) has guide rails (6) fixedly installed on both sides of its top. The base (5) has a movable base (7) movably installed on its top. The base (5) has a dimension scale fixing block (8) fixedly installed linearly and equidistantly on its top. The base (5) has a copper electrode (12) on its top. The movable base (7) has a clamping block (13) movably installed on its top.

2. The multi-station adjustable positioning clamping fixture for CNC machining of copper electrodes according to claim 1, characterized in that, The size scale fixing block (8) is fixedly installed with pins (9) at linear equidistant intervals inside, and the size scale fixing block (8) is fixedly installed with mounting screws (10) at linear equidistant intervals inside. The base (5) is provided with mounting holes (11) arranged in an array inside. The movable base (7) has U-shaped grooves (14) opened inside both ends.

3. The multi-station adjustable positioning clamping fixture for CNC machining of copper electrodes according to claim 2, characterized in that, The top of the base (5) is provided with a flat-head screw (15), the interior of the movable base (7) is provided with flat-head screw head holes (16) at linear equidistant intervals, the interior of the clamping block (13) is provided with threaded holes (17) at linear equidistant intervals, and the interior of the U-shaped groove (14) is provided with a U-shaped groove screw (18).

4. The multi-station adjustable positioning clamping fixture for CNC machining of copper electrodes according to claim 3, characterized in that, The mounting block (3) is fixedly installed with the fixing plate (2) by fixing screws (4). The bottom of the movable base (7) is provided with a sliding groove, which is adapted to the guide rail (6). One end of the guide rail (6) passes through the movable base (7) and extends to the outside of the movable base (7).

5. A multi-station adjustable positioning clamping fixture for CNC machining of copper electrodes according to claim 2, characterized in that, The size scale fixing block (8) is fixedly installed with the base (5) by mounting screws (10). The bottom end of the pin (9) passes through the size scale fixing block (8) and the base (5) in sequence, and the bottom end of the pin (9) extends into the interior of the base (5).

6. The multi-station adjustable positioning clamping fixture for CNC machining of copper electrodes according to claim 3, characterized in that, A U-shaped screw (18) is fixedly installed inside the mounting hole (11) by a thread, and a flat-head screw (15) is set inside the thread hole (17), and the flat-head screw (15) is adapted to the flat-head screw head hole (16).

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