Cutter for grinding weld bead on end face of explosion-proof valve of new energy battery case

Abstract

The utility model belongs to the field of new energy automobile battery box machining, and particularly relates to a cutter for polishing an end face weld bead of an anti-explosion valve of a new energy battery case. Comprising a grinding head, a reference positioning bolt, an axial positioning pin, a jackscrew and a mounting mechanism, a positioning cavity is formed in the grinding end of the grinding head, a first positioning hole is formed in the end of the positioning cavity, the grinding end of the grinding head is in a circular ring shape, the reference positioning bolt comprises a screw rod, a nut and a second positioning hole, and the second positioning hole is formed in the middle of the nut. Threads of the screw rod are matched with a screw hole of the anti-explosion valve; the inner diameter of the polishing end of the polishing head is matched with the outer edge of the anti-explosion valve, and the mounting mechanism is arranged at the mounting end. A locking hole is formed in the side face of the grinding head, and the jackscrew is screwed into the locking hole and can abut against the axial positioning pin. The time consumption of the polishing procedure is reduced, and the machining efficiency is greatly improved. And the production and manufacturing cost of the product is reduced, and the yield is improved.

Description

Technical Field

[0001] This utility model belongs to the field of machining of new energy vehicle battery boxes, specifically relating to a tool for grinding the weld seam on the end face of the explosion-proof valve of a new energy battery shell. Background Technology

[0002] In the manufacturing of new energy battery casings, explosion-proof valves need to be welded to the side beams of the battery casing. The flatness requirements for the end face of the explosion-proof valve are high, requiring a tight fit during assembly without any protrusions or pits; otherwise, the entire battery casing will leak. Currently, the solutions mostly involve manual grinding or using non-standard equipment for end face milling. The main drawbacks of existing technologies are as follows: First, grinding the weld seams of the explosion-proof valve relies on manual operation, resulting in high consumption of grinding discs and severe dust pollution, making on-site cleaning difficult. Second, the lack of precise end face positioning devices during manual grinding makes it difficult to achieve ideal flatness on the explosion-proof valve end face. This leads to end face leakage after assembly, directly causing product scrapping. Third, some manufacturers choose to use non-standard equipment for weld countersinking, which solves the problem to some extent, but the high investment in equipment and numerous process steps increase production costs and pollute the production environment. New technical solutions are urgently needed to address this issue. Summary of the Invention

[0003] This invention provides a tool for grinding the weld seam on the end face of the explosion-proof valve of a new energy battery casing. It reduces the time spent on the grinding process and significantly improves processing efficiency. This lowers the product manufacturing cost and increases the yield rate.

[0004] This utility model solves the above-mentioned technical problems through the following technical solutions.

[0005] A tool for grinding the weld bead on the end face of an explosion-proof valve for a new energy battery casing includes a grinding head, a reference positioning bolt, an axial positioning pin, a set screw, and a mounting mechanism. One end of the grinding head is a grinding end, and the other end is a mounting end. The grinding end of the grinding head has a positioning cavity, and the end of the positioning cavity has a first positioning hole. The grinding end of the grinding head is annular. The reference positioning bolt includes a screw, a nut, and a second positioning hole, with the second positioning hole located in the middle of the nut. The thread of the screw matches the threaded hole of the explosion-proof valve. One end of the axial positioning pin matches the parameters of the second positioning hole, and the other end matches the parameters of the first positioning hole. The inner diameter of the grinding end of the grinding head matches the outer edge of the explosion-proof valve. The mounting mechanism is located at the mounting end. A locking hole is provided on the side of the grinding head, and the set screw, when screwed into the locking hole, can push against the axial positioning pin.

[0006] The aforementioned tool for grinding the weld bead on the end face of the explosion-proof valve of a new energy battery casing has a cylindrical positioning cavity. The first positioning hole is located at the center of the inner end face of the positioning cavity. An end face positioning post is also provided. The positioning cavity passes through the axis of the end face positioning post. The end face positioning post is cylindrical, and the outer diameter of the end face positioning post matches the inner diameter of the positioning cavity.

[0007] The aforementioned tool used for grinding the weld seam on the end face of the explosion-proof valve of a new energy battery casing, when the axial positioning pin is locked, has a distance between the working surface of the grinding end and the end face positioning post equal to the sum of the thickness of the explosion-proof valve and the thickness of the nut.

[0008] Compared with existing technologies, this invention uses a grinding head to grind the welds around the explosion-proof valve of the battery casing, avoiding interference with the installation of the valve's components. The operator can use this tool to mill the welds that are higher than the end face of the explosion-proof valve. This reduces the time spent on the grinding process, significantly improving processing efficiency and lowering production costs. The axial positioning pin and end face positioning post work together to improve grinding accuracy. It also reduces dust generation, optimizing the working environment, and avoids manual grinding damage to the explosion-proof valve end face, thus reducing product scrap rates. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model;

[0010] Figure 2 This is an axial sectional view of the present invention;

[0011] Figure 3 This is a diagram illustrating the effect of using this utility model;

[0012] The markings in the attached diagram represent: 1. Grinding head, 2. Reference positioning bolt, 3. Axial positioning pin, 4. Set screw, 5. Mounting mechanism, 6. End face positioning post, 7. Screw, 8. Nut, 9. First positioning hole, 10. Second positioning hole. Detailed Implementation

[0013] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model.

[0014] like Figures 1 to 3This utility model includes a grinding head 1, a reference positioning bolt 2, an axial positioning pin 3, a set screw 4, and a mounting mechanism 5. One end of the grinding head 1 is a grinding end, and the other end is a mounting end. The grinding end of the grinding head 1 has a positioning cavity, and the end of the positioning cavity has a first positioning hole 9. The grinding end of the grinding head 1 is annular. The reference positioning bolt 2 includes a screw 7, a nut 8, and a second positioning hole 10. The second positioning hole 10 is located in the middle of the nut 8. The thread of the screw 7 matches the threaded hole of the explosion-proof valve. One end of the axial positioning pin 3 matches the parameters of the second positioning hole 10, and the other end matches the parameters of the first positioning hole 9. The inner diameter of the grinding end of the grinding head 1 matches the outer edge of the explosion-proof valve. The mounting mechanism 5 is located at the mounting end. The side of the grinding head 1 has a locking hole, and the set screw 4, when screwed into the locking hole, can push against the axial positioning pin 3.

[0015] With the above setup, before grinding, first tighten the reference positioning bolt 2 into the screw hole of the explosion-proof valve, then insert the axial positioning pin 3 into the first positioning hole 9 and the second positioning hole 10, and then install the grinding head 1 onto the mounting end of the electric drilling gun through the mounting mechanism 5 to mill the weld around the explosion-proof valve flat.

[0016] Furthermore, the positioning cavity is cylindrical, and the first positioning hole 9 is located at the center of the inner end face of the positioning cavity. To ensure the stability of the grinding head 1's travel direction during milling, an end face positioning post 6 is also provided. The positioning cavity passes through the axis of the end face positioning post, which is cylindrical, and the outer diameter of the end face positioning post 6 matches the inner diameter of the positioning cavity. Through the arrangement of the first positioning hole 9 and the end face positioning post 6, the two points of the positioning pin can be defined within the positioning cavity, ensuring the stability of the grinding head 1's rotation and preventing grinding deviation.

[0017] To further improve grinding accuracy and prevent excessive grinding that could damage the profile surface, after the axial positioning pin 3 is locked, the distance L between the working surface of the grinding end and the end face positioning post 6 is equal to the sum of the thickness H of the explosion-proof valve and the thickness d of the nut 8. During grinding, when the end face positioning post 6 is engaged with the reference positioning bolt 2, it can prevent the grinding head 1 from continuing to advance, thus preventing over-grinding.

[0018] After the explosion-proof valve is welded to the battery casing side beam, a peripheral weld bead remains around the explosion-proof valve. At this point, screw the reference positioning bolt 2 into the explosion-proof valve's threaded hole. The operator then inserts the mounting end of the grinding head 1 into the electric drill gun and tightens it. Position both ends of the axial positioning pin 3 with the first positioning hole 9 and the second positioning hole 10, then start the electric drill gun and mill at low speed. Continue milling until the end face of the nut 8 of the reference positioning bolt 2 is flush with the end face positioning post 6, smoothing the peripheral weld bead of the explosion-proof valve. Finally, remove the axial positioning pin 3 and unscrew the reference positioning bolt 2 from the explosion-proof valve's threaded hole.

[0019] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A tool for grinding the weld bead on the end face of an explosion-proof valve in a new energy battery casing, characterized in that, The device includes a grinding head, a reference positioning bolt, an axial positioning pin, a set screw, and an installation mechanism. One end of the grinding head is the grinding end, and the other end is the installation end. The grinding end of the grinding head is provided with a positioning cavity, and the end of the positioning cavity is provided with a first positioning hole. The grinding end of the grinding head is annular. The reference positioning bolt (2) includes a screw (7), a nut (8), and a second positioning hole (10). The second positioning hole (10) is located in the middle of the nut (8). The thread of the screw (7) matches the thread hole of the explosion-proof valve. One end of the axial positioning pin (3) matches the parameter of the second positioning hole (10), and the other end matches the parameter of the first positioning hole (9). The inner diameter of the grinding end of the grinding head (1) matches the outer edge of the explosion-proof valve. The installation mechanism (5) is located at the installation end. The side of the grinding head (1) is provided with a locking hole. The set screw (4) can be screwed into the locking hole to reach the axial positioning pin (3).

2. The tool for grinding the weld bead on the end face of the explosion-proof valve of a new energy battery casing as described in claim 1, characterized in that, The positioning cavity is cylindrical, the first positioning hole (9) is located at the center of the inner end face of the positioning cavity, and an end face positioning post (6) is also provided. The positioning cavity passes through the axis of the end face positioning post (6). The end face positioning post (6) is cylindrical, and the outer diameter of the end face positioning post (6) matches the inner diameter of the positioning cavity.

3. The tool for grinding the weld bead on the end face of the explosion-proof valve of a new energy battery casing as described in claim 2, characterized in that, When the axial positioning pin (3) is locked, the distance between the working surface of the grinding end and the end face positioning pin (6) is equal to the sum of the thickness of the explosion-proof valve and the thickness of the nut (8).

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