A molding die and process for a battery cover

Abstract

This invention discloses a molding die and process for battery cover plates. The invention relates to the technical field of battery cover plate molding. A guide groove is provided in the unloading plate, and a forming punch is fixed in the fixing plate. The lower end of the forming punch penetrates the limiting plate and extends into the guide groove. An annular recessed groove communicating with a through hole is provided on the bottom surface of the forming punch. A vertical spring is fixed in the upper support, and a guide post is fixed at the bottom end of the vertical spring. The guide post penetrates the upper support and upper pad and extends into the through hole. A limiting post that slides with the through hole is fixed at the bottom of the guide post, and the lower end of the limiting post extends below the forming punch. A die insert is fixed in the die plate, and a positioning post is fixed in the die insert. The positioning post, limiting post, annular recessed groove, and forming punch are coaxially arranged. The advantages of this invention are: compact structure, greatly improved battery cover plate production efficiency, and simple operation.

Description

Technical Field

[0001] This invention relates to the technical field of battery cover molding, and in particular to a molding die and process for battery cover molding. Background Technology

[0002] The battery cover is an important component installed on top of a cylindrical lithium battery. The structure of a certain battery cover is as follows: Figure 1 As shown, it includes a cover plate body 1, a central hole 2 is provided in the middle of the cover plate body 1, and a plurality of bent plates 3 are provided on the top surface of the cover plate body 1 and around the circumference of the central hole 2. One end of the bent plate 3 is integrally formed with the cover plate body 1, and the other end extends radially toward the axis of the central hole 2, and the end face 4 of the extended end is a vertical surface.

[0003] The workshop is accessible through, for example Figure 2 The blank shown is processed into a battery cover. The blank includes a cover body 1. Multiple inclined plates 5 are integrally formed on the top surface of the cover body 1 in the circumferential direction around the central hole 2. The inclined plates 5 are set at an angle to the axis of the central hole 2. During processing, the worker first uses multiple jigs to clamp and fix the cover body 1 of the blank. Then, the press head of the stamping machine is used to press each inclined plate 5 in sequence, so that the inclined plates 5 bend downward to form a bent plate 3. After all the inclined plates 5 are pressed downward, the battery cover can be produced from the blank. After processing, the jigs are opened and the battery cover is removed. This operation is repeated to continuously produce multiple battery covers.

[0004] However, while the molding method in the workshop can produce battery covers, it still has the following technical defects: I. Before each production run, the blank cover body 1 must be fixed in place with a fixture, and after production, the fixture must be opened to remove the battery cover. This undoubtedly increases production time and greatly reduces the production efficiency of the battery cover.

[0005] II. Once the blank tooling is fixed, the inclined plates 5 can only be stamped one after another by the press head of the stamping machine. This undoubtedly increases the production time of a single battery cover and further reduces the production efficiency of the battery cover. Therefore, there is an urgent need for a molding die and process that can greatly improve the production efficiency of battery covers. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a molding die and process for battery covers that is compact in structure, greatly improves the production efficiency of battery covers, and is easy to operate.

[0007] The objective of this invention is achieved through the following technical solution: A molding die for a battery cover plate, comprising an upper die and a lower die, wherein the upper die is positioned directly above the lower die, and the upper die includes an upper support, an upper pad plate and a fixing plate sequentially fixed to the bottom surface of the upper support, a limiting plate and a stripping plate fixedly mounted together below the fixing plate, a gap being left between the limiting plate and the fixing plate, and multiple vertical springs fixed between the stripping plate and the fixing plate; the lower die includes a base, a lower pad plate and a concave template sequentially fixed to the top surface of the base, a guide groove being provided in the stripping plate, a forming punch being fixed in the fixing plate, the lower end of the forming punch penetrating the limiting plate and extending into the guide groove, a through hole being provided in the forming punch along its axial direction, and an annular recessed groove communicating with the through hole being provided on the bottom surface of the forming punch; A vertical spring is fixedly installed inside the upper support. A guide post is fixedly installed at the bottom end of the vertical spring. The guide post passes through the upper support and the upper pad and extends into the through hole. A limiting post that slides with the through hole is fixedly installed at the bottom of the guide post. The lower end of the limiting post extends below the forming punch. The outer diameter of the limiting post is smaller than the diameter of the area enclosed by each inclined plate on the blank. The die insert is fixedly provided inside the die template, and a positioning post is fixedly provided inside the die insert. The upper end of the positioning post extends above the die insert and is located directly below the limiting post. The outer diameter of the positioning post is equal to the diameter of the center hole of the blank. The positioning post, the limiting post, the annular groove and the forming punch are coaxially arranged.

[0008] The left and right ends of the lower pad are each fixed with an extension plate, which is connected to the base by locking screws.

[0009] The upper pad is fixed to the upper support by locking screws.

[0010] The upper pad has a guide hole, and the guide post is slidably installed in the guide hole.

[0011] The forming punch slides into the guide groove.

[0012] The positioning pin is interference-fitted with the die insert.

[0013] A molding process for a battery cover plate includes the following steps: S1. The worker fixes the upper support of the upper mold to the stamping head of the stamping die. S2. The worker places the center hole of the blank on the upper end of the positioning post and supports the cover plate body of the blank on the top surface of the die insert to achieve tooling positioning of the blank. S3. The worker controls the stamping head of the stamping die to move downwards. The stamping head drives the upper support to move downwards. The upper support drives the upper pad, fixed plate, limit plate, stripper plate, forming punch and limit post to move downwards synchronously. When it is in the critical mold closing state, the stripper plate just presses on the top surface of the cover plate body of the blank. As the stamping head continues to move downwards, the upper support, fixed plate, limit post and forming punch move downwards relative to the stationary limit plate and stripper plate. The limit post first embeds into the area enclosed by each inclined plate on the blank. Then the annular groove of the forming punch snaps each inclined plate downwards. When it is in the mold closing state, a bent plate can be formed between the annular groove and the outer cylindrical surface of the limit post, and then the required finished battery cover plate is formed. S4. Removal of the finished battery cover: The worker controls the stamping head of the stamping die to move upward. The stamping head drives the upper support to move upward. The upper support drives the upper pad and the fixing plate to move upward synchronously. Then the compressed vertical spring returns to its original position. After returning to its original position, it drives the limiting plate, the unloading plate, the limiting post and the forming punch to move upward synchronously. After returning to its original position, the worker can remove the finished battery cover from the guide post. S5. Repeat steps S2 to S4 to continuously produce multiple finished battery cover plates from the blank.

[0014] The present invention has the following advantages: compact structure, greatly improved battery cover production efficiency, and simple operation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the battery cover. Figure 2 This is a schematic diagram of the blank structure; Figure 3 This is a schematic diagram of the structure of the present invention; Figure 4 This is a schematic diagram of the forming punch. Figure 5 This is a schematic diagram for positioning the blank; Figure 6 for Figure 5 A partially enlarged schematic diagram of part I; Figure 7 This is a schematic diagram of the present invention in the closed mold state; Figure 8 for Figure 7 A partially enlarged schematic diagram of Part II; In the figure, 1-cover plate body, 2-center hole, 3-bent plate, 4-end face, 5-sloping plate, 6-upper support, 7-fixed plate, 8-unloading plate, 9-vertical spring, 10-base, 11-lower pad, 12-concave mold plate, 13-guide groove, 14-forming punch, 15-through hole, 16-annular groove, 17-vertical spring, 18-guide post, 19-limiting post, 20-concave mold insert, 21-positioning post. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings. The scope of protection of the present invention is not limited to the following description: like Figures 3-4 As shown, a molding die for a battery cover includes an upper die and a lower die. The upper die is positioned directly above the lower die. The upper die includes an upper support 6, an upper pad plate and a fixing plate 7 sequentially fixed to the bottom surface of the upper support 6. The upper pad plate is fixed to the upper support 6 by locking screws. A limiting plate and a stripping plate 8 are integrally fixed below the fixing plate 7. A gap is left between the limiting plate and the fixing plate 7. Multiple vertical springs 9 are fixed between the stripping plate 8 and the fixing plate 7. The lower die includes a base 10, and a molded die for the top surface of the base 10. The lower pad 11 and the concave template 12 are on the surface. The left and right ends of the lower pad 11 are fixed with extension plates. The extension plates are connected to the base 10 by locking screws. The unloading plate 8 is provided with a guide groove 13. The fixing plate 7 is fixed with a forming punch 14. The forming punch 14 is slidably engaged with the guide groove 13. The lower end of the forming punch 14 passes through the limiting plate and extends into the guide groove 13. The forming punch 14 is provided with a through hole 15 arranged along its axial direction. The bottom surface of the forming punch 14 is provided with an annular groove 16 that communicates with the through hole 15. like Figures 3-4 As shown, a vertical spring 17 is fixedly installed inside the upper support 6. A guide post 18 is fixedly installed at the bottom end of the vertical spring 17. The guide post 18 passes through the upper support 6 and the upper pad and extends into the through hole 15. A limiting post 19 is fixedly installed at the bottom of the guide post 18 and slides with the through hole 15. The lower end of the limiting post 19 extends below the forming punch 14. The outer diameter of the limiting post 19 is smaller than the diameter of the area enclosed by each inclined plate 5 on the blank. A die insert 20 is fixedly installed inside the die insert 12. A positioning post 21 is fixedly installed inside the die insert 20. The positioning post 21 is interference-fitted with the die insert 20. The upper end of the positioning post 21 extends above the die insert 20 and is located directly below the limiting post 19. The outer diameter of the positioning post 21 is equal to the diameter of the center hole 2 of the blank. The positioning post 21, the limiting post 19, the annular groove 16 and the forming punch 14 are coaxially arranged. The upper pad has a guide hole, and the guide post 18 is slidably installed in the guide hole.

[0017] A molding process for a battery cover plate includes the following steps: S1. The worker fixes the upper support 6 of the upper mold to the stamping head of the stamping die. S2. The worker places the center hole 2 of the blank onto the upper end of the positioning post 21, and supports the cover plate body 1 of the blank on the top surface of the die insert 20 to achieve tooling positioning of the blank, such as... Figures 5-6 As shown; S3. The worker controls the stamping head of the stamping die to move downwards. The stamping head drives the upper support 6 to move downwards, and the upper support 6 drives the upper pad, fixed plate 7, limiting plate, stripper plate 8, forming punch 14, and limiting post 19 to move downwards synchronously. When in the critical mold closing state, the stripper plate 8 just presses on the top surface of the cover plate body 1 of the blank. As the stamping head continues to move downwards, the upper support 6, fixed plate 7, limiting post 19, and forming punch 14 move downwards relative to the stationary limiting plate and stripper plate 8. The limiting post 19 first embeds itself into the area enclosed by the various inclined plates 5 on the blank, such as... Figures 7-8 As shown, the annular groove 16 of the forming punch 14 then snaps the inclined plates 5 downwards. When in the closed mold state, a bent plate 3 can be formed between the annular groove 16 and the outer cylindrical surface of the limiting post 19, as shown. Figures 7-8 As shown, the required finished battery cover is then formed. S4. Removal of the finished battery cover: The worker controls the stamping head of the stamping die to move upward. The stamping head drives the upper support 6 to move upward. The upper support 6 drives the upper pad and the fixing plate 7 to move upward synchronously. Then the compressed vertical spring 9 returns to its original position. After returning to its original position, it drives the limiting plate, the unloading plate 8, the limiting post 19 and the forming punch 14 to move upward synchronously. After returning to its original position, the worker can remove the finished battery cover from the guide post 18. S5. Repeat steps S2 to S4 to continuously produce multiple finished battery cover plates from the blank.

[0018] In steps S2 to S4, the downward movement of the stamping head of the stamping die allows the limiting post 19 to be embedded into the area enclosed by the inclined plates 5 on the blank. Then, the forming punch 14 snaps onto the inclined plates 5 of the blank, thereby quickly bending the inclined plates 5 into a bent plate 3, and thus quickly forming the finished battery cover. Therefore, compared with the forming method in the workshop, this forming die does not require fixing the blank tooling with a fixture before forming or after forming, which greatly shortens the forming time of the finished battery cover and thus greatly improves the forming efficiency of the finished battery cover.

[0019] Furthermore, all the inclined plates 5 can be bent in one downward movement of the stamping head of the stamping die. Compared with forming by stamping machine in the workshop, it is not necessary to stamp the inclined plates 5 one by one, thereby further shortening the forming time of the finished battery cover and further improving the forming efficiency of the finished battery cover.

[0020] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention 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 invention should be included within the protection scope of the present invention.

Claims

1. A molding process for a battery cover, the battery cover comprising a cover body (1), a central hole (2) being formed in the middle of the cover body (1), and a plurality of bent plates (3) being arranged on the top surface of the cover body (1) and around the circumference of the central hole (2), one end of the bent plate (3) being integrally formed with the cover body (1), and the other end extending radially toward the axis of the central hole (2), and the end face (4) of the extended end being a vertical surface, the molding process employing a molding mold, the molding mold comprising an upper mold and a lower mold, the upper mold being disposed directly above the lower mold, the upper mold comprising an upper support (6), an upper pad plate and a fixing plate (7) sequentially fixed on the bottom surface of the upper support (6), and a fixing plate (7) being disposed below the fixing plate (7). The mold consists of an integral limiting plate and a stripper plate (8), with a gap between the limiting plate and the fixing plate (7). Multiple vertical springs (9) are fixed between the stripper plate (8) and the fixing plate (7). The lower mold includes a base (10), a lower pad plate (11) and a concave template (12) that are sequentially fixed on the top surface of the base (10). A guide groove (13) is provided in the stripper plate (8). A forming punch (14) is fixed in the fixing plate (7). The lower end of the forming punch (14) passes through the limiting plate and extends into the guide groove (13). A through hole (15) is provided in the forming punch (14) along its axial direction. An annular recess (16) communicating with the through hole (15) is provided on the bottom surface of the forming punch (14). A vertical spring (17) is fixed inside the upper support (6). A guide post (18) is fixed at the bottom end of the vertical spring (17). The guide post (18) passes through the upper support (6) and the upper pad and extends into the through hole (15). A limiting post (19) that slides with the through hole (15) is fixed at the bottom of the guide post (18). The lower end of the limiting post (19) extends below the forming punch (14). The outer diameter of the limiting post (19) is smaller than the diameter of the area enclosed by each inclined plate (5) on the blank. The recessed die plate (12) is fixed with a recessed die insert (20), the recessed die insert (20) is fixed with a positioning column (21), the upper end of the positioning column (21) extends above the recessed die insert (20) and is located directly below the limiting column (19), and the outer diameter of the positioning column (21) is equal to the diameter of the center hole (2) of the blank; the positioning column (21), the limiting column (19), the annular sink (16) and the forming punch (14) are coaxially arranged, characterized in that: The molding process includes the following steps: S1. The worker fixes the upper support (6) of the upper mold to the stamping head of the stamping die; S2. The worker places the center hole (2) of the blank on the upper end of the positioning post (21) and supports the cover plate body (1) of the blank on the top surface of the die insert (20) to achieve tooling positioning of the blank. S3. The worker controls the stamping head of the stamping die to move downwards. The stamping head drives the upper support (6) to move downwards. The upper support (6) drives the upper pad, the fixed plate (7), the limiting plate, the stripper plate (8), the forming punch (14), and the limiting post (19) to move downwards synchronously. When it is in the critical mold closing state, the stripper plate (8) just presses on the top surface of the cover plate body (1) of the blank. As the stamping head continues to move downwards, the upper support (6), the fixed plate (7), and the limiting post move downwards. (19) and forming punch (14) move downward relative to the stationary limiting plate and unloading plate (8). The limiting post (19) first embeds itself into the area enclosed by each inclined plate (5) on the blank. Then the annular groove (16) of the forming punch (14) snaps each inclined plate (5) downward. When in the closed mold state, a bent plate (3) can be formed between the annular groove (16) and the outer cylindrical surface of the limiting post (19), thereby forming the required finished battery cover. S4. Removal of the finished battery cover: The worker controls the stamping head of the stamping die to move upward. The stamping head drives the upper support (6) to move upward. The upper support (6) drives the upper pad and the fixing plate (7) to move upward synchronously. Then the compressed vertical spring (9) resets. After resetting, it drives the limiting plate, the unloading plate (8), the limiting post (19) and the forming punch (14) to move upward synchronously. After resetting, the worker can remove the finished battery cover from the guide post (18). S5. Repeat steps S2 to S4 to continuously produce multiple finished battery cover plates from the blank.

2. A forming process for a battery cover plate according to claim 1, characterized in that: The left and right ends of the lower pad (11) are both fixed with extension plates, which are connected to the base (10) by locking screws.

3. The molding process for a battery cover plate according to claim 1, characterized in that: The upper pad is fixed to the upper support (6) by locking screws.

4. The molding process for a battery cover plate according to claim 1, characterized in that: The upper pad has a guide hole, and the guide post (18) is slidably installed in the guide hole.

5. The molding process for a battery cover plate according to claim 1, characterized in that: The forming punch (14) slides into the guide groove (13).

6. The molding process for a battery cover plate according to claim 1, characterized in that: The positioning pin (21) is interference-fitted with the die insert (20).

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