High-precision large-volume battery box cover die for stamping automobile

Abstract

The utility model discloses a kind of high-precision large-volume battery box cover mould of stamping automobile, it is related to battery box cover technical field.It includes: lower die holder, the top of lower die holder is provided with lower die plate, the top of lower die plate is provided with lower punch, a plurality of first mounting holes are provided on lower die plate, lower punch is detachably fixed on lower die plate by the cooperation of first fastener and first mounting hole;Upper die holder, the bottom of upper die holder is provided with upper punch, a plurality of second mounting holes are provided on upper die holder, upper punch is detachably fixed on upper die holder by the cooperation of second fastener and second mounting hole;The bottom of upper punch is provided with a plurality of rectangular bosses, the top of lower punch is provided with a plurality of rectangular grooves corresponding with rectangular boss.The utility model solves the problem of uneven material flow, stress accumulation and mutual extrusion caused by step-by-step stamping of traditional tower punching equipment, effectively improves the quality and reliability of product.

Description

Technical Field

[0001] This utility model relates to the field of battery box cover technology, and in particular to a high-precision, large-volume stamping mold for automotive battery box covers. Background Technology

[0002] With the rapid development of the new energy vehicle industry, the demand for power batteries, as a core component, is increasing daily. The battery pack cover is a key structural component of the battery pack, requiring large dimensions, high precision, and complex reinforcing ribs and perimeter folds to ensure sufficient rigidity, sealing, and safety. Traditional casting or welding processes for producing such covers suffer from low production efficiency, large deformation, difficulty in precision control, and high costs.

[0003] Currently, although stamping technology is widely used, conventional molds have the following defects when used to produce large-volume battery box covers: 1) The overall rigidity of the mold is insufficient, and it is prone to elastic deformation under huge stamping pressure, affecting the accuracy of the finished product; 2) The protrusions on the punch and die are mostly stamped sequentially, and the depth of the protrusions cannot be guaranteed due to stress extrusion during stamping; 3) The overall flatness after stamping cannot be guaranteed, and an additional shaping process is required; 4) In order to ensure the consistency of the protrusions, the parameters of the stamping equipment need to be adjusted when stamping different protrusions, which is time-consuming and labor-intensive. Utility Model Content

[0004] The main purpose of this utility model is to provide a high-precision, large-volume stamping mold for automotive battery box covers to solve the above-mentioned problems.

[0005] To achieve the above objectives, this utility model provides a high-precision, large-volume stamping mold for automotive battery box covers, comprising: A lower mold base, wherein a lower template is provided on the top of the lower mold base, a lower punch is provided on the top of the lower template, a plurality of first mounting holes are provided on the lower template, and the lower punch is detachably fixed to the lower template by means of first fasteners cooperating with the first mounting holes; An upper mold base is provided with an upper punch at its bottom. The upper mold base is provided with a plurality of second mounting holes. The upper punch is detachably fixed to the upper mold base by means of second fasteners that engage with the second mounting holes. The bottom of the upper punch is provided with multiple downward-protruding rectangular bosses, and the top of the lower punch is provided with multiple rectangular grooves corresponding to the rectangular bosses; the rectangular bosses and the rectangular grooves are used together to stamp and form the convex structure of the battery box cover.

[0006] Furthermore, both the upper punch and the lower punch are rectangular, and seven rectangular bosses are provided and evenly distributed along the length direction of the upper punch.

[0007] Furthermore, the bottom of the upper mold base is provided with a plurality of upper mold strips, which are arranged around the upper punch. The upper mold strips are detachably connected to the upper mold base through the second mounting hole and the second fastener. The lower template is provided with multiple lower mold strips corresponding to the upper mold strips. The upper mold strips and lower mold strips are used together to stamp and form the peripheral folded edge structure of the battery box cover.

[0008] Furthermore, the top of the lower die template is provided with multiple support bars, which are located on the outside of the multiple lower die bars. The top surface of the support bars is higher than the top surface of the lower die bars, and is used to support and position the sheet metal during the stamping process.

[0009] Furthermore, the bottom of the lower mold base is provided with multiple support plates, and the lower mold plate is disposed on the support plates.

[0010] Furthermore, a guide mechanism is provided between the upper mold base and the lower mold base. The guide mechanism includes a guide post disposed on the lower mold base and a guide sleeve disposed on the upper mold base and cooperating with the guide post.

[0011] Furthermore, the lower punch is provided with an ejector device in the rectangular groove, the ejector device including an ejector rod and an ejector cylinder or spring for driving the ejector rod to move.

[0012] Furthermore, the working surfaces of both the upper and lower die strips are coated with a wear-resistant coating.

[0013] Furthermore, the bottom of the lower mold base is also provided with weight reduction holes.

[0014] This utility model has the following beneficial effects: This invention utilizes multiple rectangular bosses evenly distributed at the bottom of the upper punch to cooperate with corresponding rectangular grooves on the lower punch, enabling all seven rectangular protrusions to be stamped simultaneously in a single stamping stroke. This fundamentally solves the problems of uneven material flow, stress accumulation, and mutual compression caused by step-by-step stamping in traditional tower stamping equipment, ensuring precise, stable, and highly consistent depth dimensions for each protrusion, effectively improving product quality and reliability. Attached Figure Description

[0015] Figure 1 This is an overall schematic diagram of a high-precision, large-volume battery box cover mold for automobiles according to this utility model; Figure 2 This is a schematic diagram of the lower mold of a high-precision, large-volume battery box cover mold for automobiles according to this utility model. Figure 3 This is a schematic diagram of the upper mold of a high-precision, large-volume battery box cover mold for automobiles according to this utility model.

[0016] In the diagram: 1-lower mold base; 2-lower template; 3-lower punch; 4-upper mold base; 5-upper punch; 6-rectangular boss; 7-rectangular groove; 8-upper mold strip; 9-lower mold strip; 10-support strip; 11-support plate. Detailed Implementation

[0017] To achieve the above objectives and effects, the technical means and structure adopted by this utility model are described in detail with reference to the accompanying drawings, focusing on the features and functions of the preferred embodiments of this utility model.

[0018] As attached Figures 1-3 As shown, this utility model provides a high-precision, large-volume battery box cover mold for stamping automobiles, comprising: The system comprises a lower die base 1, a lower template 2 disposed on top of the lower die base 1, and a lower punch 3 disposed on top of the lower template 2. The lower template 2 has multiple first mounting holes, and the lower punch 3 is detachably fixed to the lower template 2 by means of first fasteners engaging with the first mounting holes. The bottom of the lower die base 1 has multiple support plates 11, and the lower template 2 is mounted on the support plates 11, thereby significantly enhancing the rigidity of the lower die portion and resisting stamping deformation.

[0019] The upper mold assembly includes an upper mold base 4 and an upper punch 5 disposed at the bottom of the upper mold base 4. The upper mold base 4 is provided with a plurality of second mounting holes, and the upper punch 5 is detachably fixed to the upper mold base 4 by means of second fasteners engaging with the second mounting holes.

[0020] The bottom of the upper punch 5 is provided with multiple downward-protruding rectangular bosses 6, and the top of the lower punch 3 is provided with multiple rectangular grooves 7 that correspond in position and match in shape to the rectangular bosses 6. The rectangular bosses 6 and rectangular grooves 7 are used together to stamp and form multiple protrusions on the surface of the battery box cover.

[0021] Specifically, the bottom of the upper mold base 4 is provided with multiple upper mold strips 8 of different lengths, which are arranged around the upper punch 5. Each upper mold strip 8 is detachably connected to the upper mold base 4 through a second mounting hole and a second fastener. The lower mold plate 2 is provided with multiple lower mold strips 9 corresponding to the positions of the upper mold strips 8. The upper mold strips 8 and lower mold strips 9 are used together to stamp and form the sealing flange structure around the battery box cover.

[0022] Preferably, the workers can adjust the length and position of multiple upper die strips 8 according to the actual required size of the folded edge of the battery box cover, and make adaptive adjustments to the lower die strip 9, so as to stamp out folded edges of different shapes and sizes.

[0023] Specifically, in order to optimize the positioning and support of the sheet metal and constrain the thickness of the sheet metal, the top of the lower template 2 is provided with multiple support bars 10. Each support bar 10 is arranged on the outside of multiple lower template bars 9, and the top surface height of the support bar 10 is higher than the top surface height of the lower template bar 9.

[0024] Specifically, to ensure mold closing accuracy, a guide mechanism is provided between the upper mold base 4 and the lower mold base 1, which includes a guide post set on the lower mold base 1 and a guide sleeve set on the upper mold base 4 and cooperating with the guide post.

[0025] Specifically, to facilitate demolding, the rectangular groove 7 of the lower punch 3 is equipped with an ejector device, which includes an ejector rod and an ejector cylinder or spring for driving the ejector rod. After stamping, the upper die rises, and the ejector device can smoothly eject the part from the groove of the lower punch 3, avoiding the part from getting stuck.

[0026] Specifically, to improve wear resistance and lifespan, the working surfaces of both the upper die strip 8 and the lower die strip 9 are coated with a wear-resistant coating such as tungsten carbide coating. The bottom of the lower die base 1 is also equipped with weight-reducing holes to reduce the overall weight of the mold while ensuring structural strength.

[0027] This application achieves simultaneous stamping of all seven rectangular protrusions in a single stamping stroke by cooperating with the corresponding rectangular grooves 7 on the lower punch 3, using multiple rectangular protrusions 6 evenly distributed at the bottom of the upper punch 5. This fundamentally solves the problems of uneven material flow, stress accumulation, and mutual compression caused by step-by-step stamping in traditional tower stamping equipment, ensuring precise, stable, and highly consistent depth dimensions of each protrusion, effectively improving product quality and reliability. Simultaneously, this application integrates the edge forming function with the protrusion forming function into a single mold, completing them simultaneously in one process. This integrated forming process avoids the redistribution and deformation of internal stress caused by multiple processing steps, resulting in excellent overall flatness of the battery box cover after demolding. This completely eliminates the need for subsequent dedicated shaping processes to correct flatness, simplifying the production process and reducing manufacturing costs.

[0028] The above description is only a preferred embodiment of the present utility model and not all embodiments. Anyone should know that structural changes made under the guidance of the present utility model are protected by the present utility model. All technical solutions that are the same as or similar to the present utility model are within the scope of protection of the present utility model.

Claims

1. A high-precision, large-volume battery box cover mold for stamping automobiles, characterized in that, include; The lower mold base (1) is provided with a lower template (2) at its top and a lower punch (3) at its top. The lower template (2) is provided with a plurality of first mounting holes. The lower punch (3) is detachably fixed to the lower template (2) by first fasteners cooperating with the first mounting holes. The upper mold base (4) has an upper punch (5) at its bottom. The upper mold base (4) has a plurality of second mounting holes. The upper punch (5) is detachably fixed to the upper mold base (4) by means of a second fastener cooperating with the second mounting holes. The bottom of the upper punch (5) is provided with a plurality of downwardly protruding rectangular bosses (6), and the top of the lower punch (3) is provided with a plurality of rectangular grooves (7) corresponding to the rectangular bosses (6); the rectangular bosses (6) and the rectangular grooves (7) are used together to stamp and form the convex structure of the battery box cover.

2. The stamping high-precision, large-volume battery box cover mold for automobiles as described in claim 1, characterized in that, Both the upper punch (5) and the lower punch (3) are rectangular, and seven rectangular bosses (6) are provided and evenly distributed along the length direction of the upper punch (5).

3. The stamping high-precision, large-volume battery box cover mold for automobiles as described in claim 1, characterized in that, The bottom of the upper mold base (4) is provided with a plurality of upper mold strips (8), and the plurality of upper mold strips (8) are arranged around the upper punch (5). The upper mold strips (8) are detachably connected to the upper mold base (4) through the second mounting hole and the second fastener. The lower template (2) is provided with a plurality of lower template strips (9) corresponding to the upper template strip (8). The upper template strip (8) and the lower template strip (9) are used to jointly stamp and form the peripheral folded edge structure of the battery box cover.

4. The stamping high-precision, large-volume battery box cover mold for automobiles as described in claim 3, characterized in that, The top of the lower template (2) is provided with multiple support strips (10), which are located on the outside of the multiple lower die strips (9). The top surface of the support strip (10) is higher than the top surface of the lower die strip (9), and is used to support and position the sheet metal during the stamping process.

5. The stamping high-precision, large-volume battery box cover mold for automobiles as described in claim 4, characterized in that, The bottom of the lower mold base (1) is provided with multiple support plates (11), and the lower template (2) is provided on the support plates (11).

6. A high-precision, large-volume battery box cover mold for automobiles as described in any one of claims 1-5, characterized in that, A guide mechanism is provided between the upper mold base (4) and the lower mold base (1). The guide mechanism includes a guide post provided on the lower mold base (1) and a guide sleeve provided on the upper mold base (4) and cooperating with the guide post.

7. The stamping mold for a high-precision, large-volume battery box cover for automobiles as described in claim 6, characterized in that, The lower punch (3) is provided with an ejector device in the rectangular groove (7). The ejector device includes an ejector rod and an ejector cylinder or spring for driving the ejector rod.

8. The stamping high-precision, large-volume battery box cover mold for automobiles as described in claim 3, characterized in that, The working surfaces of the upper mold strip (8) and the lower mold strip (9) are both coated with a wear-resistant coating.

9. A high-precision, large-volume battery box cover mold for stamping automobiles as described in claim 6, characterized in that, The bottom of the lower mold base (1) is also provided with a weight reduction hole.

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