Novel copper bar punching die

Abstract

A novel copper bar punching die comprises an upper punching die and a lower punching die. The upper stamping die is of a multi-stage elastic buffering structure, stamping impact is absorbed through cooperation of a first spring and a first equal-height sleeve, and a stripper plate is pushed to reset. An upper material pressing insert and a lower material pressing insert which are split are arranged on the periphery of the punching punch, and an elastic pressing system is formed through a T-shaped pin and a second spring, so that stable press fit of multiple layers of copper foils before punching is ensured; and the stamping lower die adopts a replaceable knife edge insert and an inner limiting column, so that the maintainability of the die is improved, the punching depth is accurately controlled, and meanwhile, one-die multi-cavity machining is supported. The modular design of the die adapts to copper bars with different thicknesses, the problems that a traditional die is uneven in material pressing and low in efficiency are effectively solved, the die is particularly suitable for precise punching scenes such as new energy battery flexible connection and flexible circuit boards, and the die has the advantages of being high in compatibility, long in service life and low in maintenance cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to metal stamping processing technical field, especially a novel copper bar punching die. BACKGROUND

[0002] The soft copper bar is composed of multiple layers of copper foils (the number varies from several to dozens of pieces), and the copper foils at both ends are fixed by welding process, and the copper foils in the middle region are in a free state. This structure is widely used in flexible circuits, new energy battery modules and other scenarios. The traditional stamping process adopts the mode of pressing the product with a template or a template insert first and then punching the product, which has great limitations.

[0003] The soft copper bar is composed of multiple layers of free copper foils. If the pressing force is insufficient, the middle copper foils that are not welded are easy to be pulled by the punch during punching, resulting in misalignment between layers, burrs, or even tearing. The thickness tolerance of the same batch of soft copper bars is large (±0.2mm), and the pressing height of the traditional die is fixed. Excessive pressing gap will cause the soft copper bar to be pressed tightly at the thin part, and small gap may damage the thick area of the soft copper bar.

[0004] Therefore, in view of the deficiencies of the prior art, it is necessary to design a novel copper bar punching die to solve the above problems.

[0005] It should be noted that the above introduction of the technical background is only for the convenience of clearly and completely describing the technical scheme of the utility model, and for the convenience of understanding by the person skilled in the art, and the above content cannot be considered as known by the person skilled in the art only because the above content is described in the background of the utility model. CONTENT OF THE UTILITY MODEL

[0006] In order to overcome the deficiencies in the prior art, the utility model aims to disclose a novel copper bar punching die, which realizes synchronous pressing of multiple layers of copper foils during punching of the soft copper bar, and realizes punching processing of one die with multiple holes.

[0007] The utility model discloses a novel copper bar punching die, which comprises a punching upper die and a punching lower die, the punching upper die comprises an upper die seat, the upper die seat is sequentially slidably assembled with an upper backing plate, an upper clamping plate, a stop plate and a stripping plate in the vertical direction below the upper die seat; the lower end of the upper die seat is elastically connected with a first equal-height sleeve through a first spring, and the first equal-height sleeve penetrates through the upper backing plate and the upper clamping plate and abuts against the upper surface of the stop plate. The first spring absorbs the initial impact of punching by elasticity, and the rebound force of the first spring pushes the stop plate and the stripping plate to reset.

[0008] A punching punch is fixedly installed on the upper clamping plate. A lower pressure insert and an upper pressure insert are coaxially sleeved on the outer periphery of the punching punch from bottom to top. The stripper plate has a stepped groove corresponding to the punching punch. The lower section of the stepped groove is movably engaged with the lower pressure insert through a mounting platform, and the upper section is movably connected with the upper pressure insert. A T-pin abuts against the upper end face of the upper pressure insert. The T-pin passes through the stop plate, the upper clamping plate, and the upper pad plate in the vertical direction, and is elastically connected to the upper die base through a second spring. The second spring is used to push the lower pressure insert to elastically press the processing area of ​​the copper busbar product, ensuring the pressing force while increasing the compatibility of its processing thickness.

[0009] The stamping die includes a lower die base, and a lower pad and a lower template are slidably mounted on the upper part of the lower die base in the vertical direction. The lower template is provided with a cutting edge corresponding to the position of the punch.

[0010] The preferred technical solution is as follows: An inner limiting post and a cutting edge insert are detachably installed on the lower template. The cutting edge insert is embedded in the lower template, and the punching cutting edge is formed on the cutting edge insert. The inner limiting post is located to the side of the cutting edge insert and is used to limit the downward depth of the punching punch. This facilitates the maintenance and replacement of the inner limiting post and the cutting edge insert, while the inner limiting post ensures that the stripper plate does not come into contact with the copper busbar product.

[0011] Preferred technical solution: The stripper plate is provided with a clearance groove to avoid protruding parts on the copper busbar product.

[0012] Preferred technical solution: The depth of the upper section of the stepped groove is greater than the thickness of the upper pressing block, ensuring that the lower pressing block contacts the copper busbar product before the stripper plate to press it.

[0013] The preferred technical solution is that the clearance between the lower pressure insert and the lower sidewall of the stepped groove is 0.004-0.006mm. This ensures both smooth sliding of the lower pressure insert in the stripper plate and the guiding function of the lower pressure insert for the punching punch.

[0014] Preferred technical solution: The second spring is a rectangular cross-section helical spring, whose axis is collinear with the axis of the T-pin, thereby improving the stability of the elastic force.

[0015] Preferred technical solution: There are multiple T-pins, which are arranged along the outer periphery of the punch to ensure uniform force distribution.

[0016] Preferred technical solution: The number of punches is multiple, enabling multi-cavity processing of a single mold.

[0017] The preferred technical solution is that there are multiple first equal-height sleeves, and each first equal-height sleeve is symmetrically distributed at the four corners of the upper mold base to improve the force balance.

[0018] Due to the application of the above technical solution, the beneficial effects of this utility model compared with the prior art are as follows:

[0019] 1) Depending on its own needs, the upper and lower pressure inserts of controllable size can be selected in different areas to work with the second spring to press the copper busbar at a fixed point, adapting to copper busbars of different thicknesses and improving the mold's processing compatibility with copper busbars.

[0020] 2) The modular design, including replaceable cutting edge inserts, upper pressure inserts, and lower pressure inserts, facilitates maintenance and extends mold life.

[0021] 3) It can ensure stable pressing force on the copper busbar processing area while punching multiple copper busbars at the same time, which improves efficiency and reduces mold cost compared with single-cavity molds.

[0022] 4) The separate design of the upper pressure plate and the lower pressure plate can avoid mutual interference between the two, and at the same time make it easier to arrange the upper elastic device. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of a novel copper busbar punching die according to the present invention;

[0025] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0026] In the attached diagrams above, 1. Upper die base; 11. First spring; 12. First equal-height sleeve; 2. Upper backing plate; 3. Upper clamping plate; 31. Punching punch; 32. Lower pressure insert; 33. Upper pressure insert; 34. T-pin; 35. Second spring; 4. Stop plate; 5. Stripper plate; 51. Stepped groove; 52. Hanging platform; 53. Clearance groove; 6. Lower die base; 7. Lower backing plate; 8. Lower template; 81. Inner limit post; 82. Knife edge insert. Detailed Implementation

[0027] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0028] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be used interchangeably where appropriate for the description of embodiments of this application herein. Furthermore, the terms "comprising" and "having," and their synonyms, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0029] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing the present invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0030] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0031] Furthermore, the terms "installation," "setting," "equipped with," "connection," "linking," "fitting," and "fitting" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Similarly, "fitting" can mean completely or partially fitted. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] Example:

[0034] like Figure 1As shown, this utility model discloses a novel copper busbar punching die, comprising an upper punching die and a lower punching die. Through precise fitting, it achieves stable pressing and efficient punching of multiple layers of copper foil. The main components of this utility model will be described in detail below:

[0035] like Figure 1 and Figure 2 As shown, the upper stamping die consists of an upper die base 1, an upper backing plate 2, an upper clamping plate 3, a stop plate 4, and a stripper plate 5. The components are slidably assembled along the vertical direction, and the specific structure is as follows:

[0036] The lower end of the upper die base 1 is elastically connected to the first equal-height sleeve 12 via the first spring 11; the first equal-height sleeve 12 passes through the upper pad 2 and the upper clamping plate 3, and abuts against the upper surface of the stop plate 4; the first spring 11 can absorb the impact force in the initial stage of stamping, and at the same time push the stop plate 4 and the stripper plate 5 to reset through its rebound force; it should be noted that when there are multiple first equal-height sleeves 12, the first equal-height sleeves 12 should preferably be symmetrically distributed at the four corners of the upper die base 1 to ensure force balance.

[0037] The upper clamping plate 3 is fixedly mounted with a punching punch 31, and a lower pressure insert 32 and an upper pressure insert 33 are coaxially sleeved on its outer periphery from bottom to top. The stripper plate 5 is provided with a stepped groove 51 corresponding to the punching punch 31. The lower section of the stepped groove 51 is movably engaged with the lower pressure insert 32 through a mounting platform 52, and the upper section is slidably connected to the upper pressure insert 33. The upper end face of the upper pressure insert 33 abuts against a T-pin 34. The T-pin 34 passes through the stop plate 4, the upper clamping plate 3, and the upper pad plate 2, and is elastically connected to the upper die base 1 through a second spring 35.

[0038] The second spring 35 is a rectangular section helical spring, and its axis is collinear with the T-pin 34. It should be noted that when there are multiple T-pins 34, it is preferable to distribute them evenly along the outer periphery of the punching punch 31 to ensure that the pressing force is transmitted evenly. During the stamping process, the second spring 35 pushes the upper pressing insert 33 and the lower pressing insert 32 to apply elastic pressure to the processing and punching area of ​​the copper busbar product to ensure the punching quality.

[0039] like Figure 1 and Figure 2 As shown, the stamping die consists of a lower die base 6, a lower backing plate 7, and a lower die plate 8, with the following specific features:

[0040] The template 8 is fitted with a detachable cutting edge insert 82, and the cutting edge is directly formed on the cutting edge insert 82, which is convenient for quick replacement after wear. The cutting edge insert 82 is provided with an inner limiting post 81 on the side, which is used to precisely control the downward depth of the cutting punch 31 and prevent the stripper plate 5 from contacting the copper busbar product and causing damage.

[0041] The stripper plate 5 is provided with a clearance groove 53, which can avoid the protruding structure on the copper busbar product and prevent stamping interference.

[0042] refer to Figure 1 and Figure 2 As shown, the usage method and principle of this utility model are described below:

[0043] Step 1: Place the multi-layer copper foil stacked copper busbar product on the surface of the lower template 8; the stamping machine drives the upper stamping die downwards, and the stripper plate 5 first contacts the inner limit post 81. After that, the stop plate 4 and the stripper plate 5 will be unable to move further downwards due to the obstruction of the inner limit post 81. At this time, the upper die holder 1 will continue to move downwards, the first spring 11 will be compressed, and the reaction force of the first spring 11 will be transmitted to the stop plate 4 through the first equal height sleeve 12;

[0044] Step 2: The second spring 35 drives the T-pin 34 to press the upper pressing insert 33. The upper pressing insert 33 presses the lower pressing insert 32 into the lower section of the stepped groove 51, so that it extends out of the stripper plate 5 to press and fix the copper busbar product, so as to prevent the copper foil from shifting during punching.

[0045] Step 3: As the upper die holder 1 continues to descend, the punching punch 31 penetrates the copper busbar product and cooperates with the cutting edge insert 82 to complete the punching; the inner limit post 81 limits the descending depth of the punching punch 31 to ensure punching consistency.

[0046] Step 4: After punching is completed, the upper punching die moves upward, the first spring 11 pushes the stop plate 4 and the stripper plate 5 to reset, and the stripper plate 5 drives the lower pressing insert 32 to detach from the copper busbar product through the hanging platform 52, and the punching waste is removed from the punching punch 31.

[0047] like Figure 1 and Figure 2 As shown, the clearance between the lower pressure insert 32 and the lower side wall of the stepped groove 51 is 0.005mm, which ensures smooth sliding and provides a guiding function.

[0048] like Figure 1 and Figure 2 As shown, the second spring 35 is a rectangular helical spring with a spring constant of 139 N / mm. When the die pressing stroke is 11 mm, the pressing force is 1529 N ± 27.8 N, which can adapt to the copper busbar thickness tolerance (±0.2 mm). The pressure difference between each product is F = kx = 139 * 0.2 = 27.8 N.

[0049] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel copper busbar punching die, comprising an upper punching die and a lower punching die, characterized in that: The stamping die includes an upper die base (1), and an upper pad (2), an upper clamping plate (3), a stop plate (4), and a stripper plate (5) are slidably mounted on the lower part of the upper die base (1) in the vertical direction. The lower end of the upper die base (1) is elastically connected to a first equal-height sleeve (12) by a first spring (11). The first equal-height sleeve (12) passes through the upper pad (2) and the upper clamping plate (3) and abuts against the upper surface of the stop plate (4). A punching punch (31) is fixedly installed on the upper clamping plate (3), and the outer periphery of the punching punch (31) is coaxially sleeved from bottom to top. A lower pressure insert (32) and an upper pressure insert (33) are provided; the stripper plate (5) is provided with a stepped groove (51) corresponding to the punching punch (31), the lower section of the stepped groove (51) is movably engaged with the lower pressure insert (32) through the hanging platform (52), and the upper section is movably connected with the upper pressure insert (33); the upper end face of the upper pressure insert (33) abuts against a T-pin (34), the T-pin (34) passes through the stop plate (4), the upper clamping plate (3) and the upper pad plate (2) in the vertical direction, and is elastically connected to the upper mold base (1) through a second spring (35); The stamping die includes a lower die base (6), and a lower pad (7) and a lower template (8) are slidably mounted on the upper part of the lower die base (6) in the vertical direction. The lower template (8) is provided with a cutting edge corresponding to the position of the punching punch (31).

2. The novel copper busbar punching die according to claim 1, characterized in that: The lower template (8) is detachably equipped with an inner limiting post (81) and a cutting edge insert (82). The cutting edge insert (82) is embedded in the lower template (8) and the cutting edge is formed on the cutting edge insert (82). The inner limiting post (81) is located on the side of the cutting edge insert (82) and is used to limit the downward depth of the cutting punch (31).

3. The novel copper busbar punching die according to claim 1, characterized in that: The stripping plate (5) is provided with a clearance groove (53).

4. The novel copper busbar punching die according to claim 1, characterized in that: The upper section of the stepped groove (51) is deeper than the thickness of the upper pressure insert (33).

5. A novel copper busbar punching die according to claim 1, characterized in that: The fitting clearance between the lower pressure insert (32) and the lower side wall of the stepped groove (51) is 0.004-0.006 mm.

6. The novel copper busbar punching die according to claim 1, characterized in that: The second spring (35) is a rectangular section helical spring, and its axis is collinear with the axis of the T-pin (34).

7. The novel copper busbar punching die according to claim 1, characterized in that: There are multiple T-pins (34), and the multiple T-pins (34) are arranged along the outer periphery of the punching punch (31).

8. A novel copper busbar punching die according to claim 1, characterized in that: The number of the punching punches (31) is multiple.

9. A novel copper busbar punching die according to claim 1, characterized in that: There are multiple first equal height sleeves (12), and each first equal height sleeve (12) is symmetrically distributed at the four corners of the upper mold base (1).

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