Moderate-strength aluminum liquid cooled shell welding method

A welding method and shell technology, applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve problems such as tiny cracks and weld sealing failure, and achieve the removal of welding residual stress, increase the sealing area, and improve the electron beam. Weldability effect

Active Publication Date: 2016-12-21
CHENGDU SIWI HIGH TECH IND GARDEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the presence of Mg2Si strengthening phase in medium-strength aluminum electron beam welding, micro-cracks are prone to occur during the melting welding process, resulting in failure of the weld seal

Method used

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  • Moderate-strength aluminum liquid cooled shell welding method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Such as figure 1 As shown, a method for welding a medium-strength aluminum liquid-cooled shell includes the following steps:

[0021] S1. Welding parts processing: According to the product structure and process size requirements, process the base plate 1 and the cover plate 2 respectively, process the cold runner 6 with steps on the base plate 1, and reserve 1mm margin for the shape of the base plate 1 and cover plate 2 ;

[0022] S2. Pre-treatment of parts: chemical cleaning and drying are used to remove oil and impurities on the surface of the workpiece. According to the needs, the fiber material 3 with a thickness of d is cut and assembled. The crystal solder Al88SiMg, with a thickness of 0.1mm, is used in superimposition according to the thickness d of the solder 3, and the cover plate 2 is fixed in the step of the base plate 1;

[0023] S3. Welding: the distance between the sealing weld 4 and the inner wall of the liquid-cooled flow channel 6 is W1, the penetrati...

Embodiment 2

[0027] Such as figure 1 As shown, a method for welding a medium-strength aluminum liquid-cooled shell includes the following steps:

[0028] S1. Welding parts processing: according to the product structure and process size requirements, process the base plate 1 and the cover plate 2 respectively, process the cold runner 6 with steps on the base plate 1, and reserve 0.8mm for the shape of the base plate 1 and cover plate 2 quantity;

[0029] S2. Pre-treatment of parts: chemical cleaning and drying are used to remove oil and impurities on the surface of the workpiece. According to the needs, the fiber material 3 with a thickness of d is cut and assembled. The crystal solder Al88SiMg, with a thickness of 0.07m, is used in superimposition according to the thickness d of the solder 3, and the cover plate 2 is fixed in the step of the base plate 1;

[0030] S3. Welding: the distance between the sealing weld 4 and the inner wall of the liquid-cooled flow channel 6 is W1, and the pe...

Embodiment 3

[0034] Such as figure 1 As shown, a method for welding a medium-strength aluminum liquid-cooled shell includes the following steps:

[0035] S1. Welding parts processing: According to the product structure and process size requirements, process the base plate 1 and cover plate 2 respectively, process the cold runner 6 with steps on the base plate 1, and reserve 0.5mm for the shape of the base plate 1 and cover plate 2 quantity;

[0036] S2. Pre-treatment of parts: chemical cleaning and drying are used to remove oil and impurities on the surface of the workpiece. According to the needs, the fiber material 3 with a thickness of d is cut and assembled. The crystal solder Al88SiMg, with a thickness of 0.05mm, is used in superimposition according to the thickness d of the solder 3, and the cover plate 2 is fixed in the step of the base plate 1;

[0037] S3. Welding: the distance between the sealing weld 4 and the inner wall of the liquid cooling channel 6 is W1, the penetration d...

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Abstract

The invention relates to a moderate-strength aluminum liquid cooled shell welding method. The method comprises the following steps: step S1, machining welding parts; step S2, pre-treating the parts; step S3, welding, wherein the distance from a seal weld to the inner wall of a liquid cooling flow channel is W1; the fusion depth D1 of the electron beam EB1 weld is equal to the summation of the thickness D of a cover plate, the thickness d of a solder material and (3-4)mm; a surface focus is adopted for welding; the scanning amplitude value of the electron beams is 0.2mm to 0.4mm; a finished weld adopts defocusing welding; the fusion depth D2 of the finished electron beam EB2 weld is 2mm to 4mm; the appearance condition of the electron beam weld is checked after welding; step S4, performing vacuum braze welding treatment; step S5, machining the shell after welding until a final product is obtained. The method disclosed by the invention has the advantages of realizing reliable welding of an embedded cover plate and a chamber body by adopting a reasonable joint design and electron beam welding and vacuum braze welding techniques, and greatly improve the maturity of a preparation technique of a liquid cooling project.

Description

technical field [0001] The invention relates to the technical field of processing liquid-cooled shells, in particular to a welding method for medium-strength aluminum liquid-cooled shells. Background technique [0002] With the development of radio frequency electronic products towards microsystemization and high integration, the demand for high-power integrated heat dissipation is becoming more and more extensive. Liquid cooling is the first choice for high-power heat dissipation. With the maturity of micro-channel heat dissipation technology, liquid-cooled housings with micro-channel structures are increasingly becoming the dominant form of modular electronic products. [0003] A typical liquid-cooled shell structure is connected by the base plate and the cover plate to form a cooling flow channel. The cooling liquid flows in or out from the liquid inlet and outlet), passes through the internal flow channel of the shell, and removes the heat on the shell through convection...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K28/02
CPCB23K28/02
Inventor 敬小军程圣王远荣曾强
Owner CHENGDU SIWI HIGH TECH IND GARDEN
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