A new type of liquid cooling plate friction stir welding head structure

Abstract

The utility model discloses a novel liquid cooling plate friction stir welding end structure, including the section bar flow channel board, both ends of section bar flow channel board all have the front plug assembly and rear plug through the friction stir welding and are welded, and the one end of front plug assembly and rear plug and section bar flow channel board are connected is provided with the boss of inserting to the inside of section bar flow channel board, and the front plug assembly includes the front plug, be provided with three groups of through -hole on the front plug, wherein the two groups of through -hole of front and back both sides of front plug assembly one end are import flow channel, and the through -hole of another group of the middle position of front plug assembly one end is export flow channel, and the import flow channel and export flow channel inside all are provided with the plug, and the front plug assembly and rear plug are connected with section bar flow channel board through the friction stir welding, thereby avoid the hollow connection of import flow channel and export flow channel and section bar flow channel board when being connected, lead to the friction stir welding can not carry out, need the post -periodic argon arc welding and carry out the repair welding.

Description

Technical Field

[0001] This utility model relates to the field of liquid cooling plate technology, specifically a novel liquid cooling plate friction stir welding head structure. Background Technology

[0002] In recent years, my country's new energy thermal management has developed rapidly, and its design and manufacturing technologies have become relatively mature. Aluminum profile liquid cooling plates consist of flow channels, front end caps, rear end caps, and nozzles. Aluminum profile liquid cooling plates have low mold opening costs, are suitable for different batch production needs, and can reduce initial investment. Aluminum profile liquid cooling plates have high heat dissipation efficiency; by directly contacting the battery cell with the aluminum alloy profile, the heat dissipation contact area is increased, improving heat exchange efficiency. Aluminum profile liquid cooling plates have strong process adaptability, allowing for the manufacture of larger-sized liquid cooling plates, suitable for new energy vehicles and energy storage systems, such as heat dissipation for bus power batteries.

[0003] The existing technical solution: Currently, for aluminum profile liquid cooling plates, the front and rear plugs are connected to the flow channel plate via friction stir welding. At the nozzle position of the front plug, there is a cavity for liquid to flow through the nozzle to the flow channel plate. This cavity of the front plug is connected to the flow channel plate via argon arc welding.

[0004] The disadvantages of the existing technology are as follows: the front plug is welded using both friction stir welding and argon arc welding; due to the heat effect of argon arc welding, the friction stir weld at the junction of the two welds may crack, leading to core leakage; this requires secondary welding, resulting in a low first-pass yield. Moreover, because the liquid cooling plate requires a high degree of flatness, the weld needs to be ground smooth after argon arc welding, which may cause secondary leakage. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the existing defects and provide a novel liquid-cooled plate friction stir welding head structure, which solves the problems of weld leakage and reduced pressure resistance at the junction of two different welding methods in the prior art. It has the technical effects of simple and easy welding process, high welding efficiency and stable welding quality, and can effectively solve the problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a novel liquid-cooled plate friction stir welding head structure, comprising a profile flow channel plate, wherein both ends of the profile flow channel plate are welded with a front plug assembly and a rear plug by friction stir welding, wherein the end of the front plug assembly and the rear plug connected to the profile flow channel plate is provided with a boss that inserts into the inner side of the profile flow channel plate, and the front plug assembly includes a front plug, wherein the front plug is provided with three sets of through holes, wherein two sets of through holes located on the front and rear sides of one end of the front plug assembly are inlet flow channels, and the other set of through holes located in the middle of one end of the front plug assembly is an outlet flow channel, and both the inlet flow channel and the outlet flow channel are provided with plugs.

[0007] Furthermore, the thickness of the boss of the front plug assembly and the rear plug is 6mm, and the connection between the front plug assembly and the rear plug and the profile flow channel plate is provided with an annular welding groove, the cross-section of which is V-shaped.

[0008] Furthermore, the through holes on the inlet and outlet channels have a diameter of 4.5 mm and a length of 20 mm.

[0009] Furthermore, a reinforcing plate with a thickness of 1mm is provided in the middle of each small hole.

[0010] Compared with existing technologies, the beneficial effects of this utility model are as follows: By connecting the front plug assembly and the rear plug to the profile flow channel plate through friction stir welding, the hollow connection between the inlet and outlet flow channels and the profile flow channel plate is avoided, which prevents friction stir welding from being performed and requires subsequent argon arc welding for repair. During the repair welding process, the superposition of the two welds and the high temperature will damage the original friction stir weld, leading to core leakage and affecting the welding quality. At the same time, the weld seam at the argon arc welding repair position needs to be ground flat to ensure the flatness of the liquid cooling plate. This practice reduces the strength of the weld and poses a safety hazard during use. The new liquid cooling plate friction stir welding end cap structure has greatly improved the liquid cooling plate in actual use. Compared with the original state, the first pass rate has increased by 80%, which not only improves the product pass rate but also reduces after-sales costs, making the product more competitive in the market and better meeting customer needs. It ensures the appearance requirements of the product and increases the welding reliability of the front plug and the profile flow channel plate, thereby effectively extending the service life of the liquid cooling plate. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic cross-sectional view of the present invention. Figure 3 This is an enlarged structural diagram of point A in this utility model; Figure 4 This is a schematic diagram of the right-side structure of this utility model; Figure 5 This is an enlarged structural diagram of section B of the present invention.

[0012] In the diagram: 1. Profile flow channel plate, 2. Front plug assembly, 201. Front plug, 202. Inlet flow channel, 203. Outlet flow channel, 3. Rear plug, 4. Plug, 5. Reinforcing plate. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] Please see Figure 1-5 This utility model provides a technical solution: a novel liquid-cooled plate friction stir welding head structure, including a profile flow channel plate 1. Both ends of the profile flow channel plate 1 are welded with a front plug assembly 2 and a rear plug 3 via friction stir welding. The ends of the front plug assembly 2 and the rear plug 3 connected to the profile flow channel plate 1 are provided with bosses that insert into the inner side of the profile flow channel plate 1. The front plug assembly 2 includes a front plug 201, which has three sets of through holes. Two sets of through holes located on the front and rear sides of one end of the front plug assembly 2 are inlet flow channels 202, and the other set is located at the front... The through hole at the middle of one end of the plug assembly 2 serves as the outlet flow channel 203. Both the inlet flow channel 202 and the outlet flow channel 203 are equipped with plugs 4. The bosses of the front plug assembly 2 and the rear plug 3 are 6mm thick. Furthermore, an annular welding groove with a V-shaped cross-section is provided at the connection between the front plug assembly 2 and the rear plug 3 and the profile flow channel plate 1. The through holes on the inlet flow channel 202 and the outlet flow channel 203 are 4.5mm in diameter and 20mm in length. A reinforcing plate 5 is provided in the middle of each hole. The thickness of the reinforcing plate 5 is... The diameter is 1mm. The front plug assembly 2 and the rear plug 3 are connected to the profile flow channel plate 1 via friction stir welding. This avoids a hollow connection between the inlet flow channel 202 and the outlet flow channel 203 and the profile flow channel plate 1, which would prevent friction stir welding from being performed and necessitate subsequent argon arc welding for repair. However, during the repair welding process, the overlapping of the two weld seams, under the influence of high temperature, can damage the original friction stir weld seam, leading to core leakage and affecting the welding quality. Furthermore, the weld seam at the argon arc welding repair location needs to be ground flat to ensure the flatness of the liquid cooling plate. This process... The old method of friction stirring welding reduced the strength of the weld and posed safety hazards during use. This new liquid-cooled plate friction stir welding head structure has greatly improved the performance of the liquid-cooled plate in actual use. Compared with the original structure, the first-pass yield rate has increased by 80%. This not only improves the product qualification rate but also reduces related after-sales costs, making the product more competitive in the market. It can also better meet the needs of customers, ensuring the appearance requirements of the product while increasing the welding reliability of the front plug and the profile flow channel plate, thereby effectively extending the service life of the liquid-cooled plate.

[0015] In use: The front plug assembly 2 and the rear plug 3 are connected to the profile flow channel plate 1 by friction stir welding. This avoids the hollow connection between the inlet flow channel 202 and the outlet flow channel 203 and the profile flow channel plate 1, which would prevent friction stir welding from being performed and require subsequent argon arc welding for repair. During the repair welding process, due to the superposition of the two welds and the influence of high temperature, the original friction stir weld will be damaged, resulting in core leakage and affecting the welding quality. Furthermore, the reinforcing plate 5 can effectively prevent the inlet flow channel 202 and the outlet flow channel 203 from collapsing during welding.

[0016] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A novel liquid-cooled plate friction stir welding head structure, comprising a profile flow channel plate (1), characterized in that: Both ends of the profile flow channel plate (1) are welded with a front plug assembly (2) and a rear plug (3) by friction stir welding. The front plug assembly (2) and the rear plug (3) are connected to the profile flow channel plate (1) with a boss inserted into the inside of the profile flow channel plate (1). The front plug assembly (2) includes a front plug (201). The front plug (201) is provided with three sets of through holes. Two sets of through holes located on the front and rear sides of one end of the front plug assembly (2) are inlet flow channels (202), and the other set of through holes located in the middle of one end of the front plug assembly (2) is an outlet flow channel (203). Both the inlet flow channel (202) and the outlet flow channel (203) are provided with plugs (4).

2. The novel liquid-cooled plate friction stir welding head structure according to claim 1, characterized in that: The thickness of the boss of the front plug assembly (2) and the rear plug (3) is 6mm, and the front plug assembly (2) and the rear plug (3) are provided with an annular welding groove at the connection between them and the profile flow channel plate (1), and the cross section of the welding groove is a V-shaped structure.

3. The novel liquid-cooled plate friction stir welding head structure according to claim 1, characterized in that: The through holes on the inlet channel (202) and outlet channel (203) have a diameter of 4.5 mm and a length of 20 mm.

4. The novel liquid-cooled plate friction stir welding head structure according to claim 1, characterized in that: A reinforcing plate (5) is provided in the middle of each small hole, and the thickness of the reinforcing plate (5) is 1mm.

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