Protective shield for laser welding

Abstract

The utility model provides a kind of protective cover for laser welding, including the cover of the cross section being circular, the inside center of cover is vertically arranged passageway, cover is arranged annular air cavity around this passageway, annular air cavity and passageway are not communicated, annular air cavity upper portion is arranged air inlet connector, bottom is correspondingly arranged annular air outlet;The top surface center of the cover is arranged and the connecting pipe that passageway is communicated, the connecting pipe is correspondingly arranged clamping structure for laser welding head;The side wall bottom end of the cover one side is protrudingly arranged guide portion.The utility model is connected with the connecting pipe and the concentricity of cover in laser welding head connection, the guide portion of the bottom end setting of cover, laser welding, guide portion is directly opposite workpiece to be welded part, and then guide welding direction, so that welder can directly opposite weld position welding, guarantee welding position accurate.

Description

Technical Field

[0001] This utility model belongs to the field of laser welding, and in particular relates to a protective cover for laser welding. Background Technology

[0002] Laser welding, as a novel connection method, has been widely used in the new energy battery industry. Series and parallel connections between battery cells are generally achieved by welding connecting tabs to individual cells. During welding, a protective gas is required; the main function of the protective gas is to protect the welded area from oxidation during the welding process.

[0003] Currently, there are two methods for introducing shielding gas in laser welding. One method involves blowing shielding gas into the side of the welding area. However, because the shielding gas is introduced from only one side, air remains on the other side of the welding area, leading to localized oxidation. The other method involves using a protective shield to enclose the entire welding area and then blowing shielding gas into it. This method effectively isolates the welding area from the air, improving welding quality. However, because the protective shield is attached to the workpiece, it is difficult to determine the welding direction during welding, sometimes resulting in deviation of the welding position. Utility Model Content

[0004] In view of this, the present invention aims to provide a protective cover for laser welding to ensure accurate laser welding position and improve welding quality.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A protective cover for laser welding includes a cover body with a circular cross-section. A channel is vertically arranged at the center of the inside of the cover body. An annular air cavity is arranged around the channel inside the cover body. The annular air cavity and the channel are not connected. An air inlet is arranged at the upper part of the annular air cavity and an annular air outlet is arranged at the bottom.

[0007] A connecting pipe communicating with the channel is provided at the center of the top surface of the cover, and a clamping structure is provided for the corresponding laser welding head of the connecting pipe;

[0008] A guide section is provided on the bottom of one side wall of the cover.

[0009] Furthermore, the clamping structure includes several claws extending upward from the top of the connecting pipe wall, and pipe clamps corresponding to these claws.

[0010] Furthermore, each gripper has a limiting boss protruding outwards at its tip.

[0011] Furthermore, the annular air cavity is an inverted annular conical cavity structure, with its inner annular wall being a vertical sidewall and its outer annular wall being an inverted conical sidewall structure, and the bottom ends of the inner and outer annular walls being flush to form the annular air outlet.

[0012] Furthermore, the guide portion is a triangular pyramid structure with the cone tip pointing outwards and flush with the bottom surface of the cover.

[0013] Furthermore, when viewed from above, the cone tip of the guide extends from the outer edge of the cover.

[0014] Compared with existing technologies, the protective cover for laser welding described in this utility model has the following advantages:

[0015] (1) In this utility model, the connecting tube for connecting the laser welding head and the cover are concentrically arranged. The guide part is provided at the bottom of the cover. During laser welding, the guide part is directly facing the part of the workpiece to be welded, thereby guiding the welding direction and enabling the welder to weld directly to the weld position, ensuring accurate welding position.

[0016] (2) In this utility model, during laser welding, protective gas is filled into the annular gas cavity and then output through the annular gas outlet, so that the welding position is filled with protective gas, preventing oxidation of the welding area due to air mixing, thereby ensuring the appropriate amount of laser welding. Attached Figure Description

[0017] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0018] Figure 1 This is a front view of a protective cover for laser welding according to an embodiment of the present utility model;

[0019] Figure 2 for Figure 1 AA section view;

[0020] Figure 3 This is a bottom view of a protective cover for laser welding as described in an embodiment of the utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1-Cover body; 2-Air inlet connector; 3-Connecting pipe; 31-Clamping claw; 32-Limiting boss; 4-Guide part; 41-Cone tip; 5-Annular air chamber; 6-Channel; 7-Annular air outlet. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] like Figure 1 , Figure 2 and Figure 3As shown, a protective cover for laser welding includes a cover body 1, which is an inverted conical shell structure closed at the top and open at the bottom. A vertical channel 6 is vertically arranged at the center of the cover body 1, with the bottom of the channel 6 open. An annular gas cavity 5 is arranged around the channel 6 inside the cover body 1, coaxially with the channel 6. The annular gas cavity 5 is an inverted annular conical cavity structure, with its inner annular wall being a vertical sidewall that also serves as the sidewall of the channel 6, and its outer annular wall being an inverted conical sidewall that also serves as the sidewall of the cover body 1. The bottom ends of the inner and outer annular walls are flush, forming an annular gas outlet 7. An air inlet connector 2 is provided at the top of the annular gas cavity 5, connected to a protective gas source to introduce protective gas into the annular gas cavity 5, which is then output through the annular gas outlet 7.

[0025] A connecting pipe 3, communicating with channel 6, is installed at the center of the top surface of the cover 1. The connecting pipe 3 and channel 6 are coaxial, and the inner diameter of the connecting pipe 3 corresponds to the outer diameter of the laser welding head. The size of the inner diameter of the connecting pipe 3 is only required to allow the laser welding head to be inserted. Several clamps 31 extend upward from the top of the connecting pipe 3 wall, with a gap between each pair of adjacent clamps 31. Several clamps 31 are matched with pipe clamps (omitted in the figure). After the laser welding head is inserted, the clamps 31 encircle the laser welding head, and the pipe clamps lock and fix the clamps 31 and the laser welding head. The clamps 31 hold and fix the laser welding head, realizing the connection and fixation between the protective cover and the laser welding head. At this time, the laser emitted by the laser welding head is directed downward along the center line of the cover 1. To facilitate the determination of the clamping position of the pipe clamp, each clamp 31 has a limiting boss 32 protruding outward from its top. When clamping, the pipe clamp is pressed against the limiting boss 32 to clamp the laser welding head.

[0026] A guide part 4 is provided protruding from the bottom of one side wall of the cover body 1. The guide part 4 is a triangular pyramid structure with the cone tip 41 facing outward and the side of the pyramid being flush with the bottom surface of the cover body 1. To facilitate observation of the welding position, the cone tip 41 of the guide part 4 extends from the outer edge of the cover body 1. That is, in the top view, the cone tip 41 extends from the outer edge of the cover body 1, i.e., the outline.

[0027] The operation process of this utility model is as follows: The laser welding head is inserted into the connecting pipe 3, and then the laser welding head and the clamp 31 of the connecting pipe 3 are locked and fixed using pipe clamps. At this time, the cover 1 and the laser welding head are fixed together. Then, the gas inlet connector 2 is connected to the protective gas source. The cover 1 is placed facing the workpiece welding position, with the cone tip of the guide part 4 facing the weld position and in the same direction as the welding. The protective gas source and the laser are turned on to perform laser welding. During welding, the welding direction is guided by the cone tip 41 of the guide part 4, meaning the cone tip 41 always corresponds to the weld position to prevent welding position deviation. During welding, the protective gas is output from the annular gas outlet 7 to protect the welding area and prevent oxidation, thus ensuring welding quality.

[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A protective cover for laser welding, characterized in that: Includes a cover (1) with a circular cross-section, a vertical channel (6) is provided at the center of the cover (1), and an annular air chamber (5) is provided around the channel (6) inside the cover (1). The annular air chamber (5) and the channel (6) are coaxial but not connected. An air inlet is provided at the top of the annular air chamber (5) and an annular air outlet (7) is provided at the bottom. The top surface of the cover (1) is provided with a connecting pipe (3), the connecting pipe (3) and the channel (6) are coaxial and connected, and the connecting pipe (3) is provided with a clamping structure for the corresponding laser welding head; A guide part (4) is provided on the bottom end of one side wall of the cover (1).

2. The protective cover for laser welding according to claim 1, characterized in that: The clamping structure includes several claws (31) extending upward from the top of the connecting pipe (3) wall, and pipe clamps corresponding to the several claws (31).

3. The protective cover for laser welding according to claim 2, characterized in that: Each gripper (31) has a limiting boss (32) protruding outward at its top.

4. The protective cover for laser welding according to claim 1, characterized in that: The annular air cavity (5) is an inverted annular conical cavity structure, with its inner annular wall being a vertical side wall and its outer annular wall being an inverted conical side wall structure. The bottom ends of the inner and outer annular walls are flush to form the annular air outlet (7).

5. A protective cover for laser welding according to claim 1, characterized in that: The guide part (4) is a triangular pyramid structure, with its cone tip (41) facing outward along the radial direction of the cover and flush with the bottom surface of the cover (1).

6. A protective cover for laser welding according to claim 5, characterized in that: When viewed from above, the cone tip (41) of the guide part (4) extends from the outer edge of the cover (1).

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