An apparatus for punching holes in copper busbars for samples

Abstract

This application discloses a device for punching copper busbars for samples, including an upper die and a lower die. The upper die includes an upper die top plate, an upper die template, an upper die punch, and a pressing and pushing part made of elastic material. This part is sleeved outside the punch and can slide relative to it, realizing the function of pressing the copper busbar before punching and pushing off the scrap material during the return stroke, effectively solving the problem of material sticking. The tail of the punch and the lower die cavity are installed through a quick-change connection structure to achieve rapid replacement. The copper busbar limiting component of the lower die is a rectangular block with a through groove in the middle, which is locked with screws and its position is adjustable to adapt to copper busbars of different specifications. This device significantly improves the quality, continuity, and die-changing efficiency of sample punching through the synergistic effect of the pressing and pushing and the quick-change structure, and is particularly suitable for the small-batch, multi-variety production needs in the research and development trial production stage.

Description

Technical Field

[0001] This application is set out in the field of copper busbar sample processing, and in particular relates to an apparatus for punching holes in copper busbar samples. Background Technology

[0002] Copper busbars, as a key conductive connection element, are widely used in power distribution, rail transportation, and new energy fields. Punching is a fundamental and important processing step in their manufacturing process.

[0003] Currently, the copper busbar punching devices commonly used in the market typically include an upper die assembly and a lower die assembly. The upper die assembly mainly includes an upper die base, an upper template mounted on the upper die base, and a punch for punching; the lower die assembly mainly includes a lower die base, a lower template, and a die that corresponds to and mates with the upper die punch. During operation, the copper busbar is placed on the lower template and initially positioned by a positioning component. The upper die moves downward, and the punch and die work together to complete the punching.

[0004] However, this traditional punching device, especially in small-batch, multi-variety production scenarios such as new product development and trial production, has revealed many technical defects, which seriously restricts production efficiency and product quality:

[0005] Because copper is relatively soft and ductile, the scrap or copper busbar itself, due to plastic deformation, exerts a strong adhesion force on the punch surface during the punching process. This causes the scrap to often stick tightly to the punch tip, making it difficult to detach automatically as it moves upwards. Operators must frequently stop the machine for manual cleaning, which not only poses safety hazards but also severely disrupts production continuity, leading to low efficiency. In sample production, each instance of scrap can cause inaccurate positioning or surface scratches on the next workpiece, directly resulting in the scrapping of valuable sample parts and delaying the development cycle.

[0006] During the sample production stage, it is necessary to frequently change punches to adapt to different hole diameter requirements, or adjust and replace positioning components to adapt to different specifications of copper busbars. Traditional punches are mostly fastened directly with bolts or clamped with pressure plates, and the disassembly process is cumbersome, time-consuming, and labor-intensive. This rigid structure cannot meet the objective requirements of "quick mold change and flexible adjustment" in sample stamping, resulting in the preparation and adjustment time of the mold being much longer than the actual stamping time, which greatly reduces the efficiency of sample trial production. Utility Model Content

[0007] The purpose of this application is to provide a copper busbar punching device optimized for sample stamping conditions. It should be able to effectively overcome the problem of material sticking to the punch, ensure punching quality and continuity, and its key components should have the ability to be quickly disassembled and adjusted, so as to comprehensively improve the efficiency and flexibility of sample prototyping.

[0008] An apparatus for punching copper busbars for samples includes an upper die and a lower die. The upper die includes an upper die top plate, an upper template, an upper die punch, and a pressing and pushing part. The upper template is installed at the bottom of the upper die top plate, the upper die punch is installed on the upper die top plate, and the pressing and pushing part is sleeved outside the upper die punch, with a through hole in its center for the upper die punch to pass through. The pressing and pushing part is made of an elastic material.

[0009] The lower die includes a lower die base plate, a lower die template, a lower die cavity, and a copper busbar limiting component. The lower die template is installed on the lower die base plate, and the lower die cavity is disposed on the lower die template corresponding to the upper die punch. The copper busbar limiting component is disposed on the surface of the lower die template and located around the lower die cavity.

[0010] Furthermore, a foolproof surface is provided on the outer periphery of the material pressing and pushing part, with the foolproof surface facing outward and corresponding to the front side of the upper template.

[0011] Furthermore, the copper busbar limiting member is rectangular in shape, with a through groove in the middle, which facilitates locking it to the lower template with screws.

[0012] Furthermore, the bottom of the upper mold plate is provided with guide posts, and the lower mold plate is provided with guide holes corresponding to the guide posts.

[0013] Furthermore, the tail of the upper die punch is mounted on the upper die top plate via a quick-change connection structure, and / or the lower die cavity is mounted on the lower template via a quick-change structure.

[0014] The beneficial effects of this application are as follows:

[0015] This application achieves a dual-purpose design by incorporating a pressing and pushing part made of elastic material (such as polyurethane or rubber) around the upper die punch. During the downward movement of the upper die, this part contacts and presses against the copper busbar before the punch, acting as a pressing element to prevent displacement or deformation of the copper busbar during punching, thus ensuring the accuracy of the hole position. When the upper die returns after punching, due to the springback characteristics of the elastic material, the pressing and pushing part has a delayed reset action relative to the punch. This action generates a downward pushing force, acting like a built-in unloader, which can promptly and effectively push away any scrap or copper busbar that may adhere to the punch, thereby completely solving the frequent problems of material sticking and dragging that occur in traditional punching. This mechanism requires no complex external pneumatic or mechanical devices, has a simple structure, and reliable operation, greatly improving the continuity and success rate of sample punching, and reducing downtime for cleaning and sample scrap rate. Attached Figure Description

[0016] Figure 1 A three-dimensional structural schematic diagram of an apparatus for punching holes in a copper busbar of a sample, provided in an embodiment of this application;

[0017] Figure 2A cross-sectional view of an apparatus for punching copper busbars for a sample, provided in an embodiment of this application;

[0018] Explanation of reference numerals in the attached figures:

[0019] 11. Upper die top plate; 12. Upper template; 13. Upper die punch; 14. Material pressing and pushing part; 15. Guide post; 16. Quick-change connection structure;

[0020] 131. Through hole;

[0021] 21. Lower mold base plate; 22. Lower mold template; 23. Lower mold cavity; 24. Copper busbar limiting component; 25. Guide hole; 26. Quick-change structure;

[0022] 141. Error-proof surface;

[0023] 241. Through groove; Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0025] In the description of this application, it should be understood that the terms "upper," "lower," "left," "right," etc., are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In particular, the understanding of the term "upper" following a noun in the claims should be understood as meaning that the entire inner and outer surfaces of the structure referred to by the noun conform to the definition of "upper."

[0026] The following detailed description, in conjunction with the accompanying drawings and preferred embodiments, describes the specific implementation methods, structures, features, and effects provided in this application.

[0027] like Figures 1 to 2 As shown, an apparatus for punching copper busbars for samples includes an upper die and a lower die. The upper die includes an upper die top plate 11, an upper template 12, an upper die punch 13, and a pressing and pushing part 14. The upper template 12 is installed at the bottom of the upper die top plate 11, the upper die punch 13 is installed on the upper die top plate 11, the pressing and pushing part 14 is sleeved on the outside of the upper die punch 13, and a through hole 131 for the upper die punch 13 to pass through is provided in its center. The pressing and pushing part 14 is made of elastic material.

[0028] The lower mold includes a lower mold base plate 21, a lower mold template 22, a lower mold cavity 23, and a copper busbar limiting component 24. The lower mold template 22 is installed on the lower mold base plate 21. The lower mold cavity 23 is set on the lower mold template 22 corresponding to the upper mold punch 13. The copper busbar limiting component 24 is set on the surface of the lower mold template 22 and located around the lower mold cavity 23.

[0029] The pressing and pushing part 144 is made of a highly elastic and wear-resistant material (such as polyurethane rubber).

[0030] Furthermore, a foolproof surface 141 is provided on the outer peripheral surface of the pressing and pushing part 14. The foolproof surface 141 faces outward and corresponds to the front side of the upper template 12. The foolproof surface 141 (e.g., a plane) must be aligned with the corresponding front side (also a plane) on the upper template 12 during installation, thereby ensuring the only correct installation position of the pressing and pushing part 14 and avoiding reverse installation.

[0031] Furthermore, the copper busbar limiting member 24 is rectangular in shape, with a through groove in its middle, which facilitates locking it onto the lower template 22 with screws. The through groove allows the limiting member to be continuously adjusted in position along the direction of the groove after the screws are loosened, in order to accommodate copper busbar workpieces of different sizes.

[0032] Furthermore, the bottom of the upper mold top plate 11 is provided with guide pillars 15, and the lower mold plate 22 is provided with guide holes 25 corresponding to the guide pillars 15.

[0033] Furthermore, the tail of the upper die punch 13 is connected to the upper die top plate 11 via a quick-change connection structure 16, and / or the lower die cavity 23 is mounted on the lower platen 22 via a quick-change structure 26. The quick-change connection structure 16 (e.g., a ball-bearing ferrule, spring collet, or Haver quick-change connector) is mounted on the upper die top plate 11. This structure allows the operator to quickly disassemble and replace the upper die punch 13 without tools or using only simple tools. The quick-change structure 26 (e.g., a pressure plate, side-mounted, or locating pin quick-change structure 26)

[0034] The working principle of this application is as follows:

[0035] First, based on the specifications and hole position requirements of the copper busbar to be punched, the appropriate upper die punch 13 and lower die die 23 are quickly selected and installed using the quick-change connection structure 16 and quick-change structure 26. Then, the screws fixing the copper busbar limiting member 24 are loosened, its position is adjusted to accurately limit the punching position of the copper busbar, and then the screws are tightened again.

[0036] The copper busbar is placed on the lower die plate 22, with its edges pressed against the adjusted copper busbar limiting member 24. The stamping machine drives the upper die downward, with the guide post 15 first engaging the guide hole 25 for precise guidance. As the upper die continues to descend, the bottom end of the blanking pusher 14 contacts and presses the copper busbar before the cutting edge of the upper die punch 13. Because the blanking pusher 14 is made of elastic material, it applies a uniform and sufficient blanking force to the copper busbar while being compressed, effectively preventing the copper busbar from moving or warping during the stamping process.

[0037] As the upper die 1 continues to descend, the upper die punch 13 overcomes the elastic resistance of the blanking and pushing part 14 and extends from its through hole 131 to punch the already clamped copper busbar. The scrap falls into the blanking hole of the lower die cavity 23. During this process, the blanking and pushing part 14 always maintains a clamping state on the copper busbar, ensuring the edge quality and dimensional accuracy of the punching.

[0038] After punching is completed, the press drives the upper die to return upwards. At this point, the crucial pushing action begins: due to friction between the upper die punch 13 and the material, as well as possible vacuum adsorption, the punched scrap or copper busbar tends to move upwards with the punch (i.e., "sticking"). However, the compressed pusher part 14, under its own elastic restoring force, will generate a downward hysteresis motion relative to the upward-moving upper die punch 13. This downward motion allows its bottom end to effectively impact or scrape the scrap adhering to the punch end, thereby forcing it to detach from the punch and allowing it to fall reliably. This process is fully automatic and requires no manual intervention.

[0039] After the upper die has fully returned to its original position, the operator can remove the punched copper busbar, insert a new copper busbar to be processed, and begin the next work cycle. If a product model needs to be changed, the punch and die can be quickly replaced and the limiting components adjusted to enter a new trial production process.

[0040] The embodiments described above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make several improvements and substitutions without departing from the technical principles of this application, and these improvements and substitutions should also be considered within the scope of protection of this application.

Claims

1. An apparatus for punching holes in copper busbars for samples, comprising an upper die and a lower die, characterized in that: The upper die includes an upper die top plate, an upper template, an upper die punch, and a pressing and pushing part. The upper template is installed at the bottom of the upper die top plate, the upper die punch is installed on the upper die top plate, and the pressing and pushing part is sleeved on the outside of the upper die punch, and its center is provided with a through hole for the upper die punch to pass through. The pressing and pushing part is made of elastic material. The lower die includes a lower die base plate, a lower die template, a lower die cavity, and a copper busbar limiting component. The lower die template is installed on the lower die base plate, and the lower die cavity is disposed on the lower die template corresponding to the upper die punch. The copper busbar limiting component is disposed on the surface of the lower die template and located around the lower die cavity.

2. The apparatus for punching holes in copper busbars for samples according to claim 1, characterized in that: The outer peripheral surface of the pressing and pushing part is provided with a foolproof surface, which faces outward and corresponds to the front side of the upper template.

3. The apparatus for punching holes in copper busbars for samples according to claim 1, characterized in that: The copper busbar limiting component is rectangular, with a through groove in the middle, which facilitates locking it to the lower template with screws.

4. The apparatus for punching holes in copper busbars for samples according to claim 1, characterized in that: The bottom of the upper mold plate is provided with guide posts, and the lower mold plate is provided with guide holes corresponding to the guide posts.

5. The apparatus for punching holes in copper busbars for samples according to claim 1, characterized in that: The tail of the upper die punch is mounted on the upper die top plate via a quick-change connection structure, and / or the lower die cavity is mounted on the lower die plate via a quick-change structure.

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