Quick riveting and flanging die for battery top cover pole

Abstract

The utility model discloses a kind of quick riveting flanging mould of battery top cover pole, including mould insert for accommodating the top cover assembled with pole, further including riveting pressure head connected with pneumatic punch press, riveting pressure head includes: riveting slider punch, its head shape is matched according to pole straight edge contour;Riveting slider riveting punch, for providing support force to the side surface of pole, its end is embedded in the lower end of riveting slider punch;Riveting inclined top, slidingly connected in the axial cavity of riveting slider riveting punch, be provided as gradually outwardly inclined structure from top to bottom. Thus, through the synergistic effect of riveting slider punch, riveting slider riveting punch and riveting inclined top, pole straight edge can be accurately turned into 90 °, and flanged rear surface flatness is high, meet the riveting accuracy and quality requirement of excessive current power battery top cover, guarantee the battery performance and security;Mould each component can be quickly adjusted and replaced according to different needs, reduce mould development design and debugging time.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery production technology, and in particular to a quick riveting and flanging mold for battery top cover terminals. Background Technology

[0002] With the booming development of the new energy vehicle industry, fast charging technology has become a key trend in the development of power batteries. To meet the demand for fast charging, high-current terminals are widely used in new energy vehicle batteries. As an important component of the battery, the connection quality between the top cover and the terminal is crucial. Currently, the terminal and the top cover are usually riveted together by hydraulic riveting molds. During riveting, the straight edge of the end of the terminal needs to be turned over. Traditional hydraulic riveting molds have the following problems when processing the connection between the top cover and the terminal: (1) It is difficult to accurately turn the straight edge of the terminal to 90° and ensure the flatness of the turn, resulting in insufficient connection strength and poor sealing between the battery top cover and the terminal, which affects the battery performance and safety; (2) The development cycle of hydraulic molds is long and the cost is high. It is impossible to quickly respond to the market demand for new battery top covers, and the consistency of the products produced is poor, which is not conducive to large-scale mass production and increases production costs. Utility Model Content

[0003] To address the technical problems existing in the background art, this utility model proposes a quick riveting and flanging mold for battery top cover terminals.

[0004] This utility model proposes a quick riveting and flanging mold for battery top cover terminals, including a mold insert for accommodating a top cover with assembled terminals, and a riveting head connected to a pneumatic punch press. The riveting head includes:

[0005] The riveting slider punch has a head shape that matches the straight edge contour of the pole post. When the pneumatic punch moves it vertically downward, it can apply pressure to the straight edge of the pole post to achieve flanging.

[0006] The riveting slider support punch is used to provide support force to the side of the pole post. Its end is embedded in the lower end of the riveting slider punch, and its interior is provided with an axial cavity.

[0007] The riveting slant is slidably connected within the axial cavity of the riveting slider support riveting punch, and is designed to gradually tilt outward from top to bottom. Its tilt angle can convert the vertical force of the pneumatic punch into a lateral force on the pole column.

[0008] Preferably, the riveting slider punch has an axial inner cavity at its center, and a spring is installed in the inner cavity. The spring is located between the riveting slider punch and the riveting inclined top and can automatically adjust the riveting force during the riveting process.

[0009] Preferably, the inner wall of the axial cavity of the riveting slider support riveting punch is provided with a plurality of axial grooves arranged circumferentially thereon, and a plurality of axial sliders are arranged circumferentially on the outer side of the riveting inclined top, the axial sliders extending into the axial grooves.

[0010] Preferably, the lower end of the riveting slider support riveting punch is chamfered.

[0011] Preferably, the riveting slider punch is made of high-strength alloy steel.

[0012] Preferably, the riveting slider support riveting punch is made of wear-resistant alloy material.

[0013] Preferably, the riveting slant is made of high-strength tool steel and its surface is coated with a friction-reducing coating.

[0014] In summary, this utility model has the following beneficial effects: Through the synergistic action of the riveting slider punch, the riveting slider support punch, and the riveting angled top, the straight edge of the terminal post can be accurately flipped to 90°, and the surface flatness after flipping is extremely high, meeting the strict requirements of high-current power battery top covers for riveting accuracy and quality, improving the connection strength and sealing between the battery top cover and the terminal post, and ensuring battery performance and safety; the high-precision processing and precise matching of each component of the mold ensure that the riveting quality of each top cover is highly consistent during mass production, reducing the defect rate and improving product quality stability; the mold, combined with a pneumatic punch press, can achieve rapid riveting, greatly improving production efficiency and shortening the processing time of a single top cover, which is conducive to the large-scale mass production of high-current power battery top covers. At the same time, the riveting slider punch, the riveting slider support punch, and the riveting angled top can be quickly adjusted and replaced according to different needs, reducing the design and debugging time in the mold development process, and enabling rapid response to market demand for new battery top covers.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] Figure 1 This is a perspective view of the riveting head according to an embodiment of the present utility model;

[0017] Figure 2 This is an exploded view of the riveting head according to an embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of the initial state of the pole post before riveting according to an embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of the flanged state after the pole post is riveted according to an embodiment of the present invention.

[0020] In the picture:

[0021] 1. Pole post; 11. Straight edge; 12. Flanged edge; 2. Riveting head; 21. Riveting slider punch; 22. Riveting slider support punch; 23. Riveting angled top; 3. Axial groove; 4. Axial slider; 5. Chamfer. Detailed Implementation

[0022] The embodiments of this utility model are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0023] like Figure 1-4 As shown, this embodiment proposes a quick riveting and flanging mold for battery top cover terminals, including a mold insert for accommodating the top cover with the terminal 1 assembled thereon, and a riveting head 2 connected to a pneumatic punch press. The riveting head 2 includes:

[0024] The riveting slider punch 21 has a head shape that matches the contour of the straight edge 11 of the pole post 1. When the pneumatic punch moves it vertically downward, it can apply pressure to the straight edge 11 of the pole post 1 to achieve flanging.

[0025] The riveting slider support punch 22 is used to provide support force to the side of the pole post 1. Its end is embedded in the lower end of the riveting slider punch 21, and its interior is provided with an axial cavity.

[0026] The lower end of the riveting slider support riveting punch 22 is provided with a chamfer 5, which serves as a guide.

[0027] The riveting inclined top 23 is slidably connected in the axial cavity of the riveting slider support riveting punch 22. It is designed as a structure that gradually tilts outward from top to bottom. Its tilt angle can convert the vertical force of the pneumatic punch into a lateral force on the pole column 1.

[0028] Specifically, the inner wall of the axial cavity of the riveting slider support riveting punch 22 is provided with multiple axial grooves 3 arranged along its circumference, and multiple axial sliders 4 are arranged along its circumference on the outer side of the riveting inclined top 23, with the axial sliders 4 extending into the axial grooves 3.

[0029] Thus, through the synergistic action of the riveting slider punch 21, the riveting slider support punch 22, and the riveting angled ejector 23, the straight edge 11 of the terminal post 1 can be precisely flipped to 90° to form a flange 12. The surface flatness after flange formation is extremely high, meeting the stringent requirements for riveting precision and quality of high-current power battery top covers. This improves the connection strength and sealing between the battery top cover and the terminal post 1, ensuring battery performance and safety. The high-precision machining and precise matching of each component of the mold ensures highly consistent riveting quality for each top cover during mass production, reducing the defect rate and improving product quality stability. This mold, combined with a pneumatic punch press, enables rapid riveting, significantly improving production efficiency and shortening the processing time for a single top cover, facilitating large-scale mass production of high-current power battery top covers. Furthermore, the riveting slider punch 21, the riveting slider support punch 22, and the riveting angled ejector 23 can be quickly adjusted and replaced according to different needs, reducing design and debugging time during mold development and enabling rapid response to market demands for new battery top covers.

[0030] Furthermore, the riveting slider punch 21 has an axial inner cavity at its center, and a spring is installed inside the cavity. The spring is located between the riveting slider punch 21 and the riveting inclined top 23, and can automatically adjust the riveting force during the riveting process. It can automatically adjust the riveting force according to the actual force conditions, avoid damage to the pole post 1 and the top cover due to excessive pressure, and at the same time ensure the firmness of the riveting.

[0031] In this embodiment, the riveting slider punch 21 is made of high-strength alloy steel. After a special heat treatment process, it possesses high hardness and good toughness. The riveting slider support punch 22 is made of wear-resistant alloy material; the riveting angled ejector 23 is made of high-strength tool steel with a friction-reducing coating on its surface, reducing frictional wear and improving the mold's service life.

[0032] In use, first place the top cover with pole 1 inside the mold insert to complete the positioning. Start the pneumatic punch and drive the riveting slider punch 21 to move downward. At the same time, the riveting angled top 23 slides along the axial groove 3 under the push of the punch, converting the vertical force into a lateral force acting on the straight edge 11 of pole 1. During this process, the built-in spring automatically adjusts the riveting force according to the force. When the riveting slider punch 21 reaches the set position, the straight edge 11 of pole 1 is flipped 90° to form a flange 12 with a flat surface. After the riveting is completed, the pneumatic punch drives the riveting slider punch 21 to reset. The riveting slider support, riveting punch 22, and riveting angled top 23 also return to the initial position. The processed top cover can then be taken out.

[0033] It should be noted that the pneumatic punching machine is an existing device, and its specific structure will not be repeated in this article.

[0034] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A quick-riveting and flanging mold for battery top cover terminals, comprising a mold insert for accommodating a top cover with assembled terminals, characterized in that, It also includes a riveting head, which is connected to a pneumatic punch press, and the riveting head includes: The riveting slider punch has a head shape that matches the straight edge contour of the pole post. When the pneumatic punch moves it vertically downward, it can apply pressure to the straight edge of the pole post to achieve flanging. The riveting slider support punch is used to provide support force to the side of the pole post. Its end is embedded in the lower end of the riveting slider punch, and its interior is provided with an axial cavity. The riveting slant is slidably connected within the axial cavity of the riveting slider support riveting punch, and is designed to gradually tilt outward from top to bottom. Its tilt angle can convert the vertical force of the pneumatic punch into a lateral force on the pole column.

2. The quick riveting and flanging mold for the battery top cover terminal as described in claim 1, characterized in that, The riveting slider punch has an axial inner cavity at its center, and a spring is installed in the inner cavity. The spring is located between the riveting slider punch and the riveting inclined top and can automatically adjust the riveting force during the riveting process.

3. The quick riveting and flanging mold for the battery top cover terminal as described in claim 1, characterized in that, The riveting slider supports the riveting punch. The inner wall of the axial cavity is provided with multiple axial grooves arranged circumferentially. The outer side of the riveting inclined top is provided with multiple axial sliders arranged circumferentially. The axial sliders extend into the axial grooves.

4. The quick riveting and flanging mold for the battery top cover terminal as described in claim 1, characterized in that, The lower end of the riveting slider support riveting punch is chamfered.

5. The quick riveting and flanging mold for the battery top cover terminal as described in claim 1, characterized in that, The riveting slider punch is made of high-strength alloy steel.

6. The quick riveting and flanging mold for the battery top cover terminal as described in claim 1, characterized in that, The riveting slider support rivet punch is made of wear-resistant alloy material.

7. The quick riveting and flanging mold for the battery top cover terminal as described in claim 4, characterized in that, The riveting slant is made of high-strength tool steel and its surface is coated with a friction-reducing coating.

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