Battery spring punching die

Abstract

The application provides a battery spring punching die, which comprises an upper die seat and a lower die seat. The die seat is sequentially provided with a blanking station, a bending station, an intermediate station and a blanking station along a feeding direction. The one-time bending station is provided with a bending punch and a corresponding bending die. The bending punch is installed on the upper die seat, the bending die is installed on the lower die seat, the end of the bending punch facing the lower die seat is provided with a first bending inclined surface and a horizontal pressing surface, the end of the bending die facing the upper die seat is provided with a second bending inclined surface and a horizontal bearing surface, the lower die seat is provided with an installation hole, the bending die is located in the installation hole, the top end of the bending die and the inner wall of the installation hole jointly form a forming cavity, the second bending inclined surface is parallel to the first bending inclined surface to jointly clamp the spring bending part of the initial spring, and the inclination angle of the second bending inclined surface facing the lower die seat is greater than a preset angle. The spring bending part is bent to the preset value by using the resilience of the hard alloy.

Description

Technical Field

[0001] This application relates to the technical field of battery connector manufacturing, and in particular to a battery spring stamping die. Background Technology

[0002] Currently, battery contact springs, as key components for battery connections, are widely manufactured using materials such as copper alloys, stainless steel, or cemented carbide. Among these, cemented carbide is increasingly used in high-precision, long-life batteries due to its high hardness, excellent wear resistance, and good electrical conductivity. However, cemented carbide has a high elastic modulus and yield strength, and the material exhibits significant elastic recovery after plastic deformation, i.e., springback. This springback can cause deviations between the dimensions of the formed contact spring and the mold cavity, affecting the assembly accuracy and performance of the product.

[0003] like Figure 1 As shown in the stainless steel battery spring, in traditional stamping processes, due to the high springback characteristics of cemented carbide, the formed spring often exhibits angular springback. Existing stamping equipment generally lacks an effective compensation mechanism, typically employing transition forming or secondary finishing processes to correct springback errors. This not only increases process complexity but may also affect the fatigue life of the spring. Furthermore, multiple processing steps exacerbate die wear and reduce the dimensional consistency of the spring. Utility Model Content

[0004] The purpose of this application is to overcome the shortcomings of the prior art and provide a battery spring stamping die suitable for stainless steel materials, which can form the bending part of the spring in one step.

[0005] The objective of this application is achieved through the following technical solution:

[0006] A battery spring stamping die includes an upper die base and a lower die base, wherein the upper die base and the lower die base are used for feeding the strip, and a blanking station, a one-time bending station, an intermediate station and a blanking station are arranged sequentially along the feeding direction;

[0007] The blanking station is provided with a plurality of blanking punches and a plurality of corresponding blanking dies. The plurality of blanking punches are arranged sequentially on the upper die base, and the plurality of blanking dies are arranged sequentially on the lower die base. The blanking station is used to blank the passing strip into spring sheets to obtain the initial spring sheets.

[0008] The one-time bending station is equipped with a bending punch and a corresponding bending die. The bending punch is installed on the upper die base, which has a first mounting hole. The bending punch is located in the first mounting hole. The end of the bending punch facing the lower die base has a first bending slope and a horizontal pressure surface. The first bending slope is located on one side of the horizontal pressure surface. The lower die base has a corresponding second mounting hole, which has a bending die located in the second mounting hole. The top of the bending die and the inner wall of the second mounting hole together form a forming cavity. The end of the bending die facing the upper die base has a second bending slope and a horizontal pressure surface. The horizontal pressure surface corresponds to the horizontal pressure surface. The second bending slope corresponds to the first bending slope. The second bending slope and the first bending slope are parallel to each other to jointly clamp the bending part of the initial spring sheet. The second bending slope has an inclination angle greater than a preset angle towards the lower die base to obtain a bent spring sheet.

[0009] The intermediate station includes several intermediate punches and several corresponding intermediate dies. The intermediate punches are sequentially arranged on the upper die base, and the intermediate dies are sequentially arranged on the lower die base. The intermediate station is used to perform secondary forming on the bent spring sheet to obtain the formed spring sheet.

[0010] The blanking station is equipped with a blanking punch and a corresponding blanking die. The blanking punch is installed on the upper die base, and the blanking die is installed on the lower die base. The blanking station is used for blanking the forming spring sheet.

[0011] In one embodiment, the tilt angle of the second bending slope toward the lower mold base includes a preset angle and a compensation angle, wherein the preset angle is 20° and the compensation angle is 1°-3°.

[0012] In one embodiment, the one-time bending station further includes an insert, which is detachably connected to the lower die base, and the second mounting hole and the bending die are located in the insert.

[0013] In one embodiment, the number of the first mounting holes, the number of the second mounting holes, the number of the bending punches and the number of the bending dies are all four. The four first mounting holes are evenly distributed on the upper die holder corresponding to the one-time bending station, and the four second mounting holes are evenly distributed on the lower die holder corresponding to the one-time bending station. Each second mounting hole is provided with a bending die. The second bending slopes of two adjacent bending dies along the feeding direction face opposite directions. The four bending punches and the four bending dies are provided in a one-to-one correspondence.

[0014] In one embodiment, the one-time bending station further includes a limiting post, a return spring, and a sealing element. The lower die base has a receiving cavity corresponding to the bending die. The limiting post and the return spring are both located in the receiving cavity. One end of the limiting post is fixedly connected to the bending die. The sealing element is used to seal the receiving cavity. The two ends of the return spring abut against the limiting post and the sealing element, respectively.

[0015] In one embodiment, the bending punch further has a first arc surface, and the first bending inclined surface and the horizontal pressure surface are transitioned by the first arc surface. The bending die further has a second arc surface; the second bending inclined surface and the horizontal pressure surface are transitioned by the second arc surface. The first arc surface and the second arc surface are used to form an arc transition structure between the spring sheet bending portion and the horizontal surface.

[0016] In one embodiment, the lower die base is provided with a plurality of clearance grooves, which are used to accommodate the countersink of the spring sheet during stamping.

[0017] In one embodiment, the profile of the forming cavity is larger than the countersunk area of ​​the spring sheet, and the profile of the horizontal pressing surface is adapted to the countersunk area of ​​the spring sheet.

[0018] In one embodiment, a first positioning block is provided at the end of the bending punch away from the lower die base, a first positioning groove is provided on the inner wall of the first mounting hole, and the first positioning block is located in the first positioning groove. A second positioning block is provided at the end of the bending die away from the upper die base, a second positioning groove is provided on the inner wall of the second mounting hole, and the second positioning block is located in the second positioning groove.

[0019] In one embodiment, multiple positioning pins are symmetrically arranged on both sides of the upper mold base, positioning holes are spaced apart on the strip, and guide holes are correspondingly provided on the lower mold base. The positioning pins are used to pass through the corresponding positioning holes and insert into the corresponding guide holes when the stamping mold is closed.

[0020] Compared with the prior art, this application has at least the following advantages:

[0021] The aforementioned battery spring stamping die achieves one-time forming of the spring bending section by setting a one-time bending station. The bending angle formed by the bending die and bending punch is greater than the preset value of the bending angle of the spring bending section, compensating for the elastic springback of the hard alloy material, so that the bending angle of the spring bending section after unloading reaches the preset value. Furthermore, the spring bending section is formed in one stamping at a one-time bending station, eliminating the need for transition stations or secondary processing steps to correct springback errors, ensuring the bending accuracy of the spring bending section, simplifying the processing technology, and extending the service life of the battery spring. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a battery spring;

[0024] Figure 2 This is a schematic diagram of the mechanism of a battery spring stamping die according to one embodiment;

[0025] Figure 3 for Figure 1 A cross-sectional view of the battery spring stamping die shown;

[0026] Figure 4 for Figure 1 The diagram shows the structure of the bending punch in the battery spring stamping die.

[0027] Figure 5 for Figure 4 A magnified view of a portion of the bending punch shown;

[0028] Figure 6 for Figure 1 The diagram shows the structure of the bending die of the battery spring stamping mold;

[0029] Figure 7 for Figure 1 The diagram shows the structure of the insert in the battery spring stamping die. Detailed Implementation

[0030] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this application.

[0031] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] To better understand the technical solution and beneficial effects of this application, the following detailed description is provided in conjunction with specific embodiments:

[0034] Please see Figures 2 to 7This is a battery spring stamping die 10 according to an embodiment of the present invention, which includes an upper die base 100 and a lower die base 200. The space between the upper and lower die bases is for material feeding, and along the feeding direction are sequentially arranged a blanking station 300, a one-time bending station 400, an intermediate station 500, and a blanking station 600. The blanking station 300 is provided with a plurality of blanking punches (not shown) and a plurality of corresponding blanking dies (not shown). The blanking punches are sequentially arranged on the upper die base 100, and the blanking dies are sequentially arranged on the lower die base 200. The blanking station 300 is used to blank the passing strip (not shown) into spring pieces 20 to obtain the initial spring pieces. A one-time bending station 400 is equipped with a bending punch 410 and a corresponding bending die 420. The bending punch 410 is mounted on an upper die holder 100, which has a first mounting hole (not shown). The bending punch 410 is located within the first mounting hole. The end of the bending punch 410 facing the lower die holder 200 forms a first bending inclined surface 411 and a horizontal pressure surface 412. The first bending inclined surface 411 is located on one side of the horizontal pressure surface 412. The lower die holder 200 has a corresponding second mounting hole (not shown), and the bending die 420 is located within the second mounting hole. Bending... The top of the die 420 and the inner wall of the second mounting hole together form a forming cavity 201. The end of the bending die 420 facing the upper die base 100 has a second bending slope 421 and a horizontal bearing surface 422. The horizontal pressing surface 412 corresponds to the horizontal bearing surface 422. The second bending slope 421 corresponds to the first bending slope 411. The second bending slope 421 and the first bending slope 411 are parallel to each other, jointly clamping the bent portion of the initial spring sheet. The inclination angle of the second bending slope 421 towards the lower die base 200 is greater than a preset angle, thus obtaining a bent spring sheet. The intermediate station 500 is provided with several intermediate punches (not shown) and several corresponding intermediate dies (not shown). The intermediate punches are sequentially arranged on the upper die base 100, and the intermediate dies are sequentially arranged on the lower die base 200. The intermediate station 500 is used for secondary processing and forming of the bent spring sheet, thus obtaining a formed spring sheet. The blanking station 600 is equipped with a blanking punch (not shown) and a corresponding blanking die (not shown). The blanking punch is installed on the upper die holder 100, and the blanking die is installed on the lower die holder 200. The blanking station 600 is used for blanking the forming spring sheet.

[0035] In this embodiment, the battery spring stamping die 10 achieves one-time forming of the spring bending portion 21 by setting a one-time bending station 400. The bending angle formed by the bending die 420 and the bending punch 410 is greater than the preset value of the bending angle of the spring bending portion 21, compensating for the elastic rebound of the hard alloy material, so that the bending angle of the spring bending portion 21 after unloading reaches the preset value. Furthermore, the spring bending portion 21 is formed in one-time by the one-time bending station 400, without the need for a transition station or secondary processing steps to correct the rebound error, ensuring the bending accuracy of the spring bending portion 21, simplifying the processing technology, and extending the service life of the battery spring 20.

[0036] like Figure 2 and Figure 3 As shown, the intermediate station 500 includes a secondary punching station and a secondary bending station. The secondary bending station is used to bend the countersink 22 of the battery spring 20.

[0037] like Figures 1 to 6 As shown, in one embodiment, the tilt angle of the second bending slope 421 toward the lower die base 200 includes a preset angle and a compensation angle. The preset angle is 20°, and the compensation angle is 1°-3°. Due to the high springback characteristic of cemented carbide, the processed spring sheet bending portion 21 will spring back. By setting the compensation angle, the processing angle is made greater than the preset angle to compensate for the springback angle, so that the bending angle of the spring sheet bending portion 21 reaches the preset angle after springback, without the need for secondary processing.

[0038] Specifically, Figure 1 The battery spring 20 shown is made of stainless steel hard alloy, and the bending angle of the spring bending part 21 is 20°. Therefore, in this embodiment, the preset angle is 20° and the compensation angle is 2°, that is, the tilt angle of the second bending slope 421 toward the lower mold base 200 is 22°.

[0039] like Figure 3 , Figure 4 and Figure 7 As shown, in one embodiment, the one-time bending station 400 further includes an insert 430, which is detachably connected to the lower die base 200. The second mounting hole and the bending die 420 are located in the insert 430. It is understood that the detachable connection between the insert 430 and the lower die base 200 allows for individual replacement and maintenance, improving the durability of the battery spring stamping die 10 and extending its service life. Simultaneously, by replacing the insert 430, the bending die 420, and the bending punch 410, processing requirements for different bending angles can be met, enhancing the modular adaptability of the one-time bending station 400.

[0040] like Figure 3 and Figure 7As shown, in one embodiment, there are four first mounting holes, four second mounting holes, four bending punches 410, and four bending dies 420. The four first mounting holes are evenly distributed on the upper die base corresponding to the one-time bending station 400, and the four second mounting holes are evenly distributed on the lower die base 200 corresponding to the one-time bending station 400. Each second mounting hole contains a corresponding bending die 420. The second bending slopes 421 of two adjacent bending dies 420 face opposite directions along the feeding direction. The four bending punches 410 and four bending dies 420 are arranged in a one-to-one correspondence. Specifically, in this embodiment, the four second mounting holes are evenly distributed on the insert 430. Each station of the battery spring stamping die 10 processes four battery springs 20 in one stamping operation, further improving production efficiency. Furthermore, the opposite orientation of two adjacent battery springs 20 along the feeding direction reduces material waste. Understandably, reversing the two bending dies 420 in the feeding direction can optimize stress distribution and structural stability, extend the service life of the battery spring stamping die 10, reduce strip offset, and improve processing accuracy.

[0041] like Figure 2 and Figure 3 As shown, in one embodiment, the one-time bending station 400 further includes a limiting post 440, a return spring 450, and a sealing element 460. The lower die base 200 has a receiving cavity 202 corresponding to the bending die 420. The limiting post 440 and the return spring 450 are both located in the receiving cavity 202. One end of the limiting post 440 is fixedly connected to the bending die 420. The sealing element 460 is disposed at the end of the receiving cavity 202 away from the bending die 420. The two ends of the return spring 450 abut against the limiting post 440 and the sealing element 460, respectively. In this embodiment, the return spring 450 abuts against the limiting post 440 and the sealing element 460, respectively, absorbing part of the impact force during the stamping process, reducing the rigid collision between the bending die 420 and the strip, reducing vibration and noise, improving the stability of the battery spring stamping die 10, and extending the service life of the battery spring stamping die 10. In addition, after the stamping is completed, the elastic restoring force of the return spring 450 pushes the limit post 440 and the bending die 420 to return to their original positions quickly, ensuring that the bending die 420 is always in the preset position and avoiding deviations caused by inertia or jamming.

[0042] like Figures 4 to 6As shown, in one embodiment, the bending punch 410 further has a first arc surface 413, through which the first bending inclined surface 411 and the horizontal pressure surface 412 transition; the bending die 420 further has a second arc surface 422, through which the second bending inclined surface 421 and the horizontal pressure surface 422 transition, through a second arc surface 423. The first arc surface 413 and the second arc surface 423 are used to form the arc transition structure between the bent portion 21 of the spring sheet and the horizontal surface. It can be understood that by simultaneously stamping the arc transition surfaces of the bent portion 21 of the spring sheet and the horizontal casting using the first arc surface 413 and the second arc surface 423, the processing technology is simplified, the processing efficiency is improved, and the bending accuracy of the battery spring sheet 20 is guaranteed.

[0043] like Figure 2 and Figure 3 As shown, in one embodiment, the lower die base 200 is provided with a plurality of clearance grooves 203, which are used to accommodate the recessed platform 22 of the spring sheet 20 during stamping. The spring sheet 20 processed by the battery spring sheet stamping die 10 has a recessed platform 22, and the blanking station 300 includes a recessed platform stamping station 310. Specifically, in this embodiment, clearance grooves 203 are provided at the station after the recessed platform stamping station 310 to accommodate the recessed platform 22 during the stamping process. This avoids the recessed platform 22 from colliding with and deforming or even being damaged by the lower die base 200, and also simplifies the structure of the die in subsequent stations, making manufacturing easier.

[0044] like Figures 3 to 7 As shown, in one embodiment, the contour shape of the forming cavity 201 is larger than the countersunk 22 of the spring 20, and the contour shape of the horizontal pressure surface 412 is adapted to the countersunk 22 of the spring 20. It is understood that the forming cavity 201 provides sufficient deformation space for the bending portion of the countersunk 22 of the spring 20, preventing material extrusion deformation or scraping against the inner wall of the forming cavity 201, improving forming accuracy, and extending the service life of the battery spring stamping die 10. Simultaneously, the horizontal pressure surface 412 of the bending punch 410 provides a stable stamping positioning reference for the bending portion, ensuring accurate forming of the bent portion 21 of the spring.

[0045] like Figures 4 to 6As shown, in one embodiment, a first positioning block 414 is provided at the end of the bending punch 410 away from the lower die holder 200, and a second positioning block 424 is provided at the end of the bending die 420 away from the upper die holder 100. In this embodiment, a first positioning groove (not shown) is formed on the inner wall of the first mounting hole, and the first positioning block 414 is located in the first positioning groove. A second positioning groove (not shown) is formed on the inner wall of the second mounting hole, and the second positioning block is located in the second positioning groove. Furthermore, the side where the first positioning block 414 is located is perpendicular to one side of the first bending inclined surface 411, and the side where the second positioning block 424 is located is perpendicular to one side of the second bending inclined surface 421. Understandably, the positioning block and the bending inclined surface are located on two mutually perpendicular sides, providing a reference for the assembly of the bending punch 410 and the bending die 420, ensuring that the bending punch 410 and the bending die 420 are installed accurately, thereby ensuring that the spring sheet bending part 21 is accurately formed and avoiding collision between the strip and the battery spring sheet stamping die 10.

[0046] like Figure 3 As shown, in one embodiment, multiple positioning pins 110 are symmetrically arranged on both sides of the upper die holder 100, and positioning holes (not shown) are provided at intervals on the strip. Corresponding guide holes (not shown) are provided on the lower die holder 200. The positioning pins 110 are used to pass through the corresponding positioning holes and insert into the corresponding guide holes during stamping and die closing. It can be understood that by using the positioning pins in conjunction with the positioning holes of the strip and the guide holes of the lower die holder, the strip is positioned during stamping, avoiding offset caused by vibration or lateral force, and improving processing accuracy.

[0047] Compared with the prior art, this application has at least the following advantages:

[0048] The aforementioned battery spring stamping die achieves one-time forming of the spring bending section by setting a one-time bending station. The bending angle formed by the bending die and bending punch is greater than the preset value of the bending angle of the spring bending section, compensating for the elastic springback of the hard alloy material, so that the bending angle of the spring bending section after unloading reaches the preset value. Furthermore, the spring bending section is formed in one stamping at a one-time bending station, eliminating the need for transition stations or secondary processing steps to correct springback errors, ensuring the bending accuracy of the spring bending section, simplifying the processing technology, and extending the service life of the battery spring.

[0049] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the disclosed patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A battery spring stamping die, comprising an upper die base and a lower die base, wherein the upper die base and the lower die base are used for feeding material strip, characterized in that, Along the feeding direction, a punching station, a one-time bending station, an intermediate station, and a blanking station are set up in sequence; The blanking station is provided with a plurality of blanking punches and a plurality of corresponding blanking dies. The plurality of blanking punches are arranged sequentially on the upper die base, and the plurality of blanking dies are arranged sequentially on the lower die base. The blanking station is used to blank the passing strip into spring sheets to obtain the initial spring sheets. The one-time bending station is equipped with a bending punch and a corresponding bending die. The bending punch is installed on the upper die base, which has a first mounting hole. The bending punch is located in the first mounting hole. The end of the bending punch facing the lower die base has a first bending slope and a horizontal pressure surface. The first bending slope is located on one side of the horizontal pressure surface. The lower die base has a corresponding second mounting hole, which has a bending die located in the second mounting hole. The top of the bending die and the inner wall of the second mounting hole together form a forming cavity. The end of the bending die facing the upper die base has a second bending slope and a horizontal pressure surface. The horizontal pressure surface corresponds to the horizontal pressure surface. The second bending slope corresponds to the first bending slope. The second bending slope and the first bending slope are parallel to each other to jointly clamp the bending part of the initial spring sheet. The second bending slope has an inclination angle greater than a preset angle towards the lower die base to obtain a bent spring sheet. The intermediate station is provided with a plurality of intermediate punches and a plurality of corresponding intermediate dies. The plurality of intermediate punches are sequentially arranged on the upper die base, and the plurality of intermediate dies are sequentially arranged on the lower die base. The intermediate station is used to perform secondary forming on the bent spring sheet to obtain the formed spring sheet. The blanking station is equipped with a blanking punch and a corresponding blanking die. The blanking punch is installed on the upper die base, and the blanking die is installed on the lower die base. The blanking station is used for blanking the forming spring sheet.

2. The battery spring stamping die according to claim 1, characterized in that, The tilt angle of the second bending slope toward the lower mold base includes a preset angle and a compensation angle. The preset angle is 20° and the compensation angle is 1°-3°.

3. The battery spring stamping die according to claim 1, characterized in that, The one-time bending station also includes an insert, which is detachably connected to the lower die base, and the second mounting hole and the bending die are located in the insert.

4. The battery spring stamping die according to claim 1, characterized in that, The number of the first mounting hole, the second mounting hole, the bending punch, and the bending die are all four. The four first mounting holes are evenly distributed on the upper die holder corresponding to the one-time bending station, and the four second mounting holes are evenly distributed on the lower die holder corresponding to the one-time bending station. Each second mounting hole is provided with a bending die. The second bending slope of two adjacent bending dies along the feeding direction faces opposite directions. The four bending punches and four bending dies are provided in a one-to-one correspondence.

5. The battery spring stamping die according to claim 1, characterized in that, The one-time bending station also includes a limiting post, a return spring, and a sealing element. The lower die base has a receiving cavity corresponding to the bending die. The limiting post and the return spring are both located in the receiving cavity. One end of the limiting post is fixedly connected to the bending die. The sealing element is used to seal the receiving cavity. The two ends of the return spring abut against the limiting post and the sealing element, respectively.

6. The battery spring stamping die according to claim 1, characterized in that, The bending punch also has a first arc surface, and the first bending inclined surface and the horizontal pressure surface are transitioned by the first arc surface; the bending die also has a second arc surface, and the second bending inclined surface and the horizontal pressure surface are transitioned by the second arc surface. The first arc surface and the second arc surface are used to form an arc transition structure between the bending part of the spring sheet and the horizontal surface.

7. The battery spring stamping die according to claim 1, characterized in that, The lower die base is provided with several clearance grooves, which are used to accommodate the countersink of the spring sheet during stamping.

8. The battery spring stamping die according to claim 1, characterized in that, The contour shape of the forming cavity is larger than the countersunk area of ​​the spring sheet, and the contour shape of the horizontal pressing surface is adapted to the countersunk area of ​​the spring sheet.

9. The battery spring stamping die according to claim 1, characterized in that, A first positioning block is provided at the end of the bending punch away from the lower die base, and a first positioning groove is provided on the inner wall of the first mounting hole, with the first positioning block located in the first positioning groove. A second positioning block is provided at the end of the bending die away from the upper die base, and a second positioning groove is provided on the inner wall of the second mounting hole, with the second positioning block located in the second positioning groove.

10. The battery spring stamping die according to claim 1, characterized in that, Multiple positioning pins are symmetrically arranged on both sides of the upper mold base, positioning holes are spaced apart on the strip, and guide holes are correspondingly provided on the lower mold base. The positioning pins are used to pass through the corresponding positioning holes and insert into the corresponding guide holes when the stamping mold is closed.

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