Cold heading forming die for positive pole

Abstract

The utility model discloses a cold heading forming die of a positive pole column, which comprises a movable die part and a movable die part, the movable die part comprises a stamping die shell, a punch and a die core, the punch and the die core are coaxially arranged in the stamping die shell, and the punch can move in the die core; the fixed mold part comprises an inner mold shell, an inner mold and an inner mold ejector rod, the inner mold and the inner mold ejector rod are both arranged in the inner mold shell, and the inner mold ejector rod is used for ejecting a formed product to the outer side of the inner mold; wherein the inner die is used for placing a material, and the punch and the die core correspond to the position of the material placed in the inner die and can perform extrusion forming action. According to the cold heading die, cold heading forming of the positive pole can be achieved through die design, an efficient production mode is achieved, the product shape is met through plastic flowing of materials, the strength can be improved, the machining amount is reduced, the material utilization rate is improved, and the production efficiency is improved while the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of cold heading forming, in particular to a cold heading forming die for a positive pole column of a new energy vehicle battery. Background Art

[0002] With the improvement of environmental awareness, the development of new energy vehicles has advanced by leaps and bounds. In the field of transportation, new energy electric vehicles have attracted more and more attention and favor. Manufacturers in related fields of new energy electric vehicles have emerged like mushrooms after a spring rain. As the power source of new energy vehicles, the battery is an indispensable key component. Therefore, it is necessary to produce large-capacity rechargeable batteries quickly and simply.

[0003] In the field of power battery technology, the pole column is a component that connects the inside and outside of the power battery, enabling the battery to achieve the functions of charging and discharging. At present, the negative pole of the power battery uses an aluminum-copper composite pole column. On the outside of the battery, the positive pole column is made of aluminum material, and the use effect and service life of the battery are affected by the connection stability between aluminum and copper.

[0004] As an energy component of the battery, the positive pole column is made of aluminum alloy. As Figure 1 shown, the shape is a flat plate with a protruding cylinder. The traditional manufacturing method is through riveting or welding of the cylinder and the flat plate, resulting in high equipment costs and slow production efficiency, making it difficult to meet market demands. Summary of the Utility Model

[0005] The utility model is to avoid the deficiencies of the prior art and provides a cold heading forming die for a positive pole column.

[0006] The utility model solves the technical problems by adopting the following technical solutions: A cold heading forming die for a positive pole column, comprising:

[0007] A moving die part, the moving die part includes a die shell, a punch, and a die core. The punch and the die core are coaxially arranged in the die shell, and the punch can move within the die core;

[0008] A fixed die part, the fixed die part includes an inner die shell, an inner die, and an inner die ejector rod. The inner die and the inner die ejector rod are both arranged in the inner die shell, and the inner die ejector rod is used to eject the formed product to the outside of the inner die;

[0009] Wherein, the inner die is for placing the material, and the punch and the die core correspond to the position of the material placed in the inner die and can perform an extrusion forming action.

[0010] In several embodiments, a cavity recessed inward is provided at each of the opposite ends of the die shell. A partition is provided between the two cavities, and a through hole is provided on the partition for the punch to pass through.

[0011] In several embodiments, the punch includes a tail end and a punch end arranged coaxially. The outer diameter of the punch end is smaller than that of the tail end, and the tail end cannot pass through the through hole.

[0012] In several embodiments, a spring is provided on the tail end.

[0013] In several embodiments, an inclined surface is provided on the inner wall of the die core near the punch end.

[0014] In several embodiments, a chamfered surface is provided at the outer end of the inner die.

[0015] In several embodiments, an inner die pad is further provided in the inner die shell. The inner die pad is arranged coaxially with the inner die, the inner die pad abuts against the inner die, and the inner die ejector rod can move within the inner die pad and the inner die.

[0016] The beneficial effects of the present utility model are as follows:

[0017] Through the die design, the present utility model can realize the cold heading forming of the positive electrode column, achieve an efficient production mode, meet the product shape through the plastic flow of the material, improve the strength, reduce the machining amount, improve the material utilization rate, and improve the production efficiency while reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are only for the purpose of illustrating the selected embodiments and do not represent all possible embodiments, and should not be considered as a limitation on the scope of the present utility model.

[0019] Figure 1 Schematically shows the structure of the positive electrode column in the prior art;

[0020] Figure 2 Schematically shows the processing state of the cold heading forming die of the positive electrode column in an embodiment;

[0021] Figure 3 Schematically shows the forming state of the cold heading forming die of the positive electrode column in an embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the embodiments of the present utility model will be described in detail with reference to the drawings. To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model.

[0023] Accordingly, the following detailed description of the embodiments of the present invention provided in conjunction with the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0024] As Figures 2 - 3 shown, the cold heading forming die of the positive electrode post in this embodiment is mainly composed of a moving die part 10 and a fixed die part 20 that cooperate with each other, and the material 100 is formed between the moving die part 10 and the fixed die part 20.

[0025] Specifically, the moving die part includes a die shell 11, a punch 12, and a die core 13. The punch 12 and the die core 13 are both coaxially arranged in the die shell 11, and the punch 12 can move within the die core 13. Specifically, at each of the opposite ends of the die shell 11, there is an inwardly concave cavity 111. A partition 112 is provided between the two cavities 111, and a through hole is provided on the partition 112. The two cavities 111 are connected through the through hole, and the two cavities 111 are coaxially arranged. The through hole is for the punch 12 to pass through.

[0026] Among them, the punch 12 includes a tail end 121 and a punch head end 122 that are coaxially arranged. The outer diameter of the punch head end 122 is smaller than the outer diameter of the tail end 121. The tail end 121 cannot pass through the through hole, and a spring 14 is provided on the tail end 121. The punch 12 is stably pressed on the material 100 through the spring 14 structure.

[0027] Moreover, a slope 131 is provided on the inner wall of the die core 13 near the punch head end 122. Through the slope 131 structure, the flow rate of the material 100 at the slope 131 position and other positions forms a change, realizing an eccentric flow structure, guiding to realize the flat part, and thus realizing the forming of the positive electrode post.

[0028] And, the fixed die part 20 includes an inner die shell 21, an inner die 22, and an inner die ejector rod 23. The inner die 22 and the inner die ejector rod 23 are both arranged in the inner die shell 21. The inner die ejector rod 23 is used to eject the formed product to the outside of the inner die 22. The inner die 22 is for the material 100 to be placed in, and a chamfered surface 221 is provided at the outer end of the inner die 22. The punch 12 and the die core 13 correspond to the position of the material 100 placed in the inner die 22 and can perform an extrusion forming action.

[0029] At the same time, an inner die pad 24 is also provided in the inner die shell 21. The inner die pad 24 is coaxially arranged with the inner die 22. The inner die pad 24 abuts against the inner die 22, and the inner die ejector rod 23 can move within the inner die pad 24 and the inner die 22.

[0030] When the present utility model is in use, when the punch 12 enters the inner die 22 to the right to extrude the material, the columnar body of the positive electrode post is first formed in the inner die 22, and the inner die pad 24 is responsible for dispersing the load of the inner die 22. Then, the eccentric load during the forming of the flat plate is resisted by the die core 13 sleeved in the die shell 11, and the spring device is used to hold and form. After forming, the product is ejected to the left by the inner die ejector rod 23. Since the product is integrally covered by the inner die, good protection can be provided for the control of dimensions.

[0031] All the ways described in this article can be carried out in any suitable order. Any and all examples used, or the exemplary language provided in this article (such as "for example") are only to better illustrate the present utility model, and are not a limitation on the scope of the present utility model, unless otherwise claimed. The language in the detailed description should not be construed as indicating any essential factors for practicing the present utility model that are not claimed.

[0032] The present utility model describes the preferred implementation schemes, including the best ways known to the inventors for implementing the present utility model. Of course, those skilled in the art can obviously see the changes in these preferred implementation schemes. The inventors anticipate that those skilled in the art can use these changes as appropriate. The inventors point out that the present utility model can be implemented in other ways different from those specifically described herein. Therefore, the present utility model includes all improvements included in the gist and scope of the present utility model defined by the claims. Moreover, unless otherwise stated or there is an obvious contradiction in the content, the present utility model includes any of the above factors and all possible changes thereof.

Claims

1. A cold heading forming die for a positive electrode column, characterized in that: include: A movable die part, the movable die part comprises a die shell, a punch, and a die core, the punch and the die core are coaxially arranged in the die shell, and the punch can move in the die core; A fixed mold part, the fixed mold part includes an inner mold shell, an inner mold and an inner mold ejector pin, the inner mold and the inner mold ejector pin are both arranged in the inner mold shell, and the inner mold ejector pin is used to eject the formed product to the outside of the inner mold; Wherein, the inner mold is used for placing materials, and the punch and the mold core correspond to the positions of the materials placed in the inner mold and can perform extrusion molding actions; The punch includes a coaxially arranged tail end and a punch end, the outer diameter of the punch end is smaller than the outer diameter of the tail end, the tail end cannot pass through the through hole, a spring is arranged on the tail end, and an inclined surface is arranged on the inner wall of the mold core on one side close to the punch end.

2. The cold heading forming die for a positive electrode column according to claim 1, characterized in that: The two opposite ends of the punch shell are each provided with a cavity recessed inwardly, a partition is provided between the two cavities, and a through hole is provided on the partition for the punch to pass through.

3. The cold heading forming die for a positive electrode column according to claim 1, characterized in that: The outer end of the inner mold is provided with a chamfered surface.

4. The cold heading forming die for the positive electrode column according to claim 3, characterized in that: An inner mold pad is also arranged in the inner mold shell. The inner mold pad is coaxially arranged with the inner mold, the inner mold pad abuts against the inner mold, and the inner mold ejector rod can move in the inner mold pad and the inner mold.

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