A multi-step clinching cover plate mold structure

Abstract

The utility model discloses a kind of cover plate die structure of multi-step riveting, including upper die holder, upper backing plate, upper clamping plate, stop plate, stripper plate and lower die holder, outer guide sleeve, ball guide sleeve and outer guide column are provided between the upper die holder and lower die holder, the top surface of lower die holder is provided with lower bolster plate, the top surface of lower bolster plate is connected with lower backing plate by sliding assembly, riveting tray is provided on the lower backing plate, for supporting cover plate product, riveting punch of the bottom angle that this die is set from front to back by upper clamping plate is smaller and smaller, the distribution stamping of cover plate product is realized, rivet hole on cover plate product due to excessive stress and fatigue caused by one-time stamping is avoided, and then the stability of riveting is improved, and upper die holder is pressed every time, and cover plate product in different stamping stages can be simultaneously stamped, riveting efficiency is improved, structure is simple, efficient, suitable for popularization and application.

Description

Technical Field

[0001] This utility model relates to the field of cover plate mold technology, specifically a cover plate mold structure with multi-step riveting. Background Technology

[0002] In the field of new energy battery manufacturing, the riveting quality of the battery cover directly affects the safety and lifespan of the battery.

[0003] Currently, the commonly used riveting process is one-time stamping. Although the riveting efficiency is high, the rivet holes of the cover plate products are prone to stress concentration, which causes fatigue in the material forming the head of the rivet hole, reducing its strength and thus reducing the stability of the riveting.

[0004] Therefore, a multi-step riveting cover plate mold structure is proposed, which can achieve distributed stamping in a single stamping stroke, avoid stress concentration, and maintain high-efficiency production. Utility Model Content

[0005] The purpose of this utility model is to provide a multi-step riveting cover plate mold structure to solve the problem mentioned in the background art that the existing battery cover plate is easily subjected to stress concentration and fatigue in the rivet hole by riveting in one step, which in turn reduces its strength and reduces the riveting stability.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a multi-step riveting cover plate mold structure, including an upper mold base, an upper pad, an upper clamping plate, a stop plate, a stripper plate, and a lower mold base. An outer guide sleeve, a ball guide sleeve, and an outer guide post are provided between the upper mold base and the lower mold base. A lower support plate is provided on the top surface of the lower mold base. A lower pad is connected to the top surface of the lower support plate through a sliding component. A riveting tray is provided on the lower pad for supporting the cover plate product.

[0007] The upper clamping plate is provided with riveting punches with progressively smaller bottom angles from front to back, and the bottom angle of the rearmost riveting punch is zero.

[0008] The stop plate has a through opening directly below the riveting punch, and the stripper plate has a second inner guide sleeve directly below the riveting punch.

[0009] Preferably, an equal-height sleeve is provided between the upper clamping plate, the stop plate and the stripping plate, an inner guide post is provided on the bottom surface of the stripping plate, and a first inner guide sleeve is provided on the top surface of the lower pad directly below the inner guide post.

[0010] Preferably, the outer guide sleeve, ball guide sleeve and outer guide post are provided in two sets, located at the two corners of the bottom surface of the upper mold base, arranged diagonally.

[0011] Preferably, the outer guide sleeve is disposed on the bottom surface of the upper mold base, the outer guide post is disposed on the top surface of the lower mold base, the ball guide sleeve is disposed on the outer guide post, and a spring is sleeved on the outer guide post below the ball guide sleeve.

[0012] Preferably, the sliding assembly includes a slide rail and a slider. The slide rail is disposed on the top surface of the lower support plate, and the slider is disposed on the bottom surface of the lower pad plate. The length direction of the slide rail is the same as the arrangement direction of the riveting punches.

[0013] Preferably, there are two slide rails and two corresponding sliders, which slide on the slide rails.

[0014] Preferably, four inner guide pillars are provided, which are respectively located at the four corners of the bottom surface of the stripper plate, and four corresponding first inner guide sleeves are provided.

[0015] Preferably, a limit stop is provided on the rear side of the top surface of the lower support plate to limit the lower pad. When the lower pad contacts the limit stop, the inner guide post is aligned with the first inner guide sleeve. When the upper mold base moves downward, the inner guide post slides into the first inner guide sleeve.

[0016] Preferably, the upper clamping plate is provided with riveting punches with the same bottom corner from left to right.

[0017] Preferably, there are two riveting punches arranged from left to right, and three riveting punches arranged from front to back.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows: This mold achieves distributed stamping of the cover plate product by setting riveting punches with increasingly smaller bottom angles from front to back on the upper clamping plate, avoiding fatigue of the rivet holes on the cover plate product due to excessive force caused by a single stamping, thereby improving the stability of riveting. Moreover, each pressing operation of the upper mold base can simultaneously stamp the cover plate product at different stamping stages, improving the riveting efficiency. The structure is simple, efficient, and suitable for widespread application. Attached Figure Description

[0019] Figure 1 This is an overall structural view of the present invention;

[0020] Figure 2 This is a front view of the present invention;

[0021] Figure 3 This is a side sectional view of the present invention;

[0022] Figure 4 This is a front sectional view of the present invention;

[0023] Figure 5 This is a schematic diagram illustrating the function of the riveting punch and cover plate in this utility model.

[0024] In the diagram: 1. Upper mold base; 2. Upper backing plate; 3. Upper clamping plate; 4. Equal height sleeve; 5. Stop plate; 6. Stripper plate; 7. Inner guide post; 8. First inner guide sleeve; 9. Lower backing plate; 10. Lower mold base; 11. Lower support plate; 12. Slide rail; 13. Slider; 14. Outer guide sleeve; 15. Ball bearing guide sleeve; 16. Outer guide post; 17. Riveting tray; 18. Limiting block; 19. Riveting punch; 20. Second inner guide sleeve; 21. Cover plate product. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Reference Figures 1-5 As shown, this utility model provides a technical solution for a multi-step riveting cover plate mold structure:

[0027] A multi-step riveting cover plate mold structure includes an upper mold base 1, an upper pad plate 2, an upper clamping plate 3, a stop plate 5, a stripper plate 6, and a lower mold base 10. An outer guide sleeve 14, a ball guide sleeve 15, and an outer guide post 16 are provided between the upper mold base 1 and the lower mold base 10. A lower support plate 11 is provided on the top surface of the lower mold base 10. A lower pad plate 9 is connected to the top surface of the lower support plate 11 through a sliding component. A riveting tray 17 is provided on the lower pad plate 9 for supporting the cover plate product 21.

[0028] It should be noted that the upper clamping plate 3 is equipped with riveting punches 19 with progressively smaller bottom angles arranged from front to back, with the bottom angle of the rearmost riveting punch 19 being zero.

[0029] This mold uses riveting punches 19 with progressively smaller bottom angles arranged from front to back on the upper clamping plate 3 to achieve distributed stamping of the cover plate product 21. This avoids fatigue of the rivet holes on the cover plate product 21 due to excessive force caused by a single stamping, thereby improving the stability of the riveting. In addition, each pressing operation of the upper mold base 1 can simultaneously stamp the cover plate product 21 at different stamping stages, improving the riveting efficiency. The structure is simple, efficient, and suitable for widespread application.

[0030] It should be noted that, in addition, the reference Figure 3 As shown, the stop plate 5 is provided with a through opening directly below the riveting punch 19, and the stripper plate 6 is provided with a second inner guide sleeve 20 directly below the riveting punch 19.

[0031] Reference Figure 1As shown, an equal-height sleeve 4 is provided between the upper clamping plate 3, the stop plate 5 and the stripping plate 6. An inner guide post 7 is provided on the bottom surface of the stripping plate 6, and a first inner guide sleeve 8 is provided on the top surface of the lower pad plate 9 directly below the inner guide post 7.

[0032] It should be noted that the equal height sleeve 4 is existing technology. In this embodiment, it is used to limit the stripper plate 6 and ensure that the cover plate product 21 is removed from the stripper plate 6 to avoid jamming. This is existing technology and will not be described in detail here.

[0033] Reference Figure 1 As shown, in an optional embodiment, two sets of outer guide sleeve 14, ball guide sleeve 15 and outer guide post 16 are provided, located at the two corners of the bottom surface of the upper mold base 1, arranged diagonally.

[0034] It should be noted that the outer guide sleeve 14 is located on the bottom surface of the upper mold base 1, the outer guide post 16 is located on the top surface of the lower mold base 10, the ball guide sleeve 15 is located on the outer guide post 16, and a spring is sleeved on the outer guide post 16 below the ball guide sleeve 15.

[0035] It should be noted that the ball guide sleeve 15 is existing technology, which makes the outer guide sleeve 14 more precise and flexible when moving downward due to reduced frictional resistance. It should be noted that the ball guide sleeve 15, outer guide sleeve 14, outer guide post 16 and spring are arranged to guide the downward stroke of the upper mold base 1. The outer guide sleeve 14 is slidably connected to the outer side of the ball guide sleeve 15, and the ball guide sleeve 15 is slidably connected to the outer side of the outer guide post 16. The spring is compressed by the ball guide sleeve 15 during the downward stroke of the upper mold base 1.

[0036] Reference Figure 1 and Figure 4 As shown, in an optional embodiment: the sliding assembly includes a slide rail 12 and a slider 13. The slide rail 12 is disposed on the top surface of the lower support plate 11, and the slider 13 is disposed on the bottom surface of the lower pad plate 9. The length direction of the slide rail 12 is the same as the arrangement direction of the riveting punches 19. (Refer to...) Figure 2 As shown, there are two slide rails 12 and two corresponding sliders 13. The sliders 13 slide on the slide rails 12. It should be noted that the two slide rails 12 are respectively set on both sides of the top surface of the lower support plate 11.

[0037] Reference Figure 1 As shown, in an optional embodiment: four inner guide posts 7 are provided, respectively located at the four corners of the bottom surface of the stripper plate 6, and four corresponding first inner guide sleeves 8 are provided. (Refer to...) Figure 3As shown, it should be noted that a limit stop 18 is provided on the rear side of the top surface of the lower support plate 11 to limit the lower pad 9. When the lower pad 9 contacts the limit stop 18, the inner guide post 7 is aligned with the first inner guide sleeve 8. When the upper mold base 1 moves downward, the inner guide post 7 slides into the first inner guide sleeve 8.

[0038] Reference Figure 4 As shown, the upper clamping plate 3 is equipped with riveting punches 19 arranged from left to right with the same bottom corner. Specifically, there are two riveting punches 19 arranged from left to right on the upper clamping plate 3, and three riveting punches 19 arranged from front to back on the upper clamping plate 3. It should be noted that this arrangement allows the mold to rivet multiple sets of cover plate products 21 simultaneously, thereby improving the working efficiency of the mold.

[0039] The working principle of this device will now be explained through its operation process: It should be noted that before the cover plate product 21 is placed on the riveting tray 17, the lower pad 9 is located directly in front of the mold. At this time, the inner guide post 7 does not extend into the first inner guide sleeve 8. This makes it easy to place the riveting tray 17 from the top of the riveting tray 17. The specific structure of the riveting tray 17 is set according to the cover plate product 21 and only plays an adaptive supporting role. This is existing technology and will not be elaborated on here.

[0040] Reference Figure 5 As shown, the worker first places the cover plate product 21 on the riveting tray 17 at the front, then pushes the lower pad 9 until its rear side abuts against the limit block 18. At this time, the upper mold base 1 is activated to perform a downward pressing operation. The riveting punch 19 at the front extends the second inner guide sleeve 20 to punch the rivet holes on the cover plate product 21, causing the rivet hole heads on the cover plate product 21 to be thickened at a certain angle. Then, the upper mold base 1 performs a return operation, pulling the lower pad 9 out from directly below the upper mold base 1. The worker then places the cover plate product 21, which has undergone one punching, from front to back. In the second row, place the unpressed cover plate product 21 on the foremost riveting tray 17, push the lower pad 9 against the limit stop 18, and start the upper mold base 1 again to perform the pressing operation. At this time, the riveting punches 19 in the second row from front to back will perform a second pressing on the rivet holes on the cover plate product 21 that has already been pressed once, so that the rivet hole heads on the cover plate product 21 are further thickened. The unpressed cover plate product 21 will be pressed once under the pressing of the riveting punches 19 in the first row. Repeat the above operation until the rivet holes on the cover plate product 21 are thickened and flattened. Refer to Figure 5 As shown in the rightmost diagram, this forms the head of the rivet, completing the riveting operation.

[0041] This mold uses riveting punches 19 with progressively smaller bottom angles arranged from front to back on the upper clamping plate 3 to achieve distributed stamping of the cover plate product 21. This avoids fatigue of the rivet holes on the cover plate product 21 due to excessive force caused by a single stamping, thereby improving the stability of the riveting. In addition, each pressing operation of the upper mold base 1 can simultaneously stamp the cover plate product 21 at different stamping stages, improving the riveting efficiency. The structure is simple, efficient, and suitable for widespread application.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-step riveting cover plate mold structure, comprising an upper mold base (1), an upper pad plate (2), an upper clamping plate (3), a stop plate (5), a stripper plate (6), and a lower mold base (10), wherein an outer guide sleeve (14), a ball guide sleeve (15), and an outer guide post (16) are provided between the upper mold base (1) and the lower mold base (10), characterized in that: The lower mold base (10) has a lower support plate (11) on its top surface. The lower support plate (11) is connected to a lower pad plate (9) via a sliding component. The lower pad plate (9) is provided with a riveting tray (17) for supporting the cover plate product (21). The upper clamping plate (3) is provided with riveting punches (19) with increasingly smaller bottom angles arranged from front to back, and the bottom angle of the last riveting punch (19) is zero. The stop plate (5) is provided with a through opening directly below the riveting punch (19), and the stripper plate (6) is provided with a second inner guide sleeve (20) directly below the riveting punch (19).

2. A multi-step clinch cover die structure according to claim 1, wherein: An equal-height sleeve (4) is provided between the upper clamping plate (3), the stop plate (5) and the stripping plate (6). An inner guide post (7) is provided on the bottom surface of the stripping plate (6). A first inner guide sleeve (8) is provided on the top surface of the lower pad (9) directly below the inner guide post (7).

3. A multi-step clinch cover die structure according to claim 2, wherein: The outer guide sleeve (14), ball guide sleeve (15) and outer guide post (16) are provided in two sets, located at the two corners of the bottom surface of the upper mold base (1) and arranged diagonally.

4. A multi-step clinch cover die structure according to claim 3, wherein: The outer guide sleeve (14) is disposed on the bottom surface of the upper mold base (1), the outer guide post (16) is disposed on the top surface of the lower mold base (10), the ball guide sleeve (15) is disposed on the outer guide post (16), and a spring is sleeved on the outer guide post (16) below the ball guide sleeve (15).

5. A multi-step clinch cover die structure according to claim 4, wherein: The sliding assembly includes a slide rail (12) and a slider (13). The slide rail (12) is disposed on the top surface of the lower support plate (11), and the slider (13) is disposed on the bottom surface of the lower pad plate (9). The length direction of the slide rail (12) is the same as the arrangement direction of the riveting punch (19).

6. A multi-step clinch cover die structure according to claim 5, wherein: There are two slide rails (12) and two corresponding sliders (13), which slide on the slide rails (12).

7. A multi-step clinch cover die structure according to claim 6, wherein: Four inner guide pillars (7) are provided, which are respectively located at the four corners of the bottom surface of the stripper plate (6), and four inner guide sleeves (8) are provided accordingly.

8. A multi-step clinch cover die structure according to claim 7, wherein: The lower support plate (11) has a limit stop (18) on the rear side of its top surface to limit the lower pad (9). When the lower pad (9) contacts the limit stop (18), the inner guide post (7) is aligned with the first inner guide sleeve (8). When the upper mold base (1) moves downward, the inner guide post (7) slides into the first inner guide sleeve (8).

9. A multi-step clinch cover die structure according to claim 8, wherein: The upper clamping plate (3) is provided with riveting punches (19) with the same bottom corner from left to right.

10. A multi-step clinch cover die structure according to claim 9, wherein: There are two riveting punches (19) arranged from left to right, and three riveting punches (19) arranged from front to back.

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