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Friction stir welding-soldering composite welding method

A technology of friction stir welding and composite welding, which is applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve problems such as inability to weld, and achieve the effect of strong adaptability and simple operation

Inactive Publication Date: 2016-12-21
SHANGHAI AEROSPACE EQUIP MFG GENERAL FACTORY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a friction stir welding-brazing composite welding method to solve the problem that the friction stir welding overlapping surface of the locking bottom structure cannot be welded

Method used

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Embodiment Construction

[0017] The following will combine Figure 1 ~ Figure 2 The friction stir welding-brazing composite welding method of the present invention will be further described in detail.

[0018] The friction stir welding-brazing composite welding method of the preferred embodiment of the present invention comprises the following steps:

[0019] 1) Process the bottom plate and cover plate of the bottom locking structure;

[0020] see figure 1 , the bottom locking structure includes a bottom plate 1 and a cover plate 2. A process step is processed on one side of the bottom plate 1 as a back support for the weld seam. When the bottom plate 1 and the cover plate 2 are assembled, the bottom plate 1 and the cover plate 2 butted at the process step, the side surface of the bottom plate 1 is butted with the side surface of the cover plate 2 to form a butt joint surface 3, and the upper surface of the process step of the bottom plate 1 and the lower surface of the cover plate 2 are formed lap...

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Abstract

The invention provides a friction stir welding-soldering composite welding method comprising following steps: 1) machining a bottom plate and a cover plate of a lock bottom structure, machining a process step at one side of the bottom plate, wherein the thickness of the cover plate is less than the height of the process step by 0.5mm to 1mm; 2) filling solder in faying surface assembly gap between the assembled bottom plate and the cover plate, wherein soft solder having melting point between 300 to 400 DEG C is selected as the solder; 3) welding the butt joint surface of the bottom plate and the cover plate through friction stir welding; 4) melting the solder with the heat generated during the friction stir welding, wherein the faying surface assembly gap between the bottom plate and the cover plate is wetted and filled with the melted solder to realize soldering of the lock bottom structure welded seam faying surfaces. By means of the friction stir welding-soldering composite welding method, the problem that the friction stir welding faying surfaces of the lock bottom structure cannot be welded is solved.

Description

[0001] technical field [0002] The invention relates to the field of welding technology, in particular to a friction stir welding-brazing composite welding method. [0003] Background technique [0004] The bottom lock structure is a special welding structure adopted when a rigid backing plate cannot be applied to the back of the weld. The base metal on one side of the weld is processed with a process step as the back support of the weld. This structure has the dual characteristics of butt joints and lap joints. The bottom lock structure is currently widely used in the welding of cooling panels. [0005] As a single-fluid (gas or liquid) heat exchanger, the cooling panel is usually made of aluminum alloy. It has the characteristics of high heat dissipation efficiency and small temperature gradient. It has broad application prospects in power electronics, aerospace, ships and other fields. It is an ideal cooling element for various high-power electronic equipment. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K28/02B23K31/02
CPCB23K28/02B23K31/02
Inventor 汤化伟尹玉环崔凡徐奎沈浩然夏佩云张聃李丹
Owner SHANGHAI AEROSPACE EQUIP MFG GENERAL FACTORY
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