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Special backing plate for friction-stir welding and welding method adopting backing plate

A technology of friction stir welding and welding method, which is applied in the direction of welding equipment, welding/welding/cutting items, non-electric welding equipment, etc., and can solve the problems affecting the welding quality and reliability of aluminum alloy sheet welds, large welding deformation, etc., to achieve Adaptable, easy-to-operate effects

Inactive Publication Date: 2017-03-22
SHANGHAI AEROSPACE EQUIP MFG GENERAL FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The traditional friction stir welding process of aluminum alloy plates is prone to incomplete penetration defects and large welding deformation after welding
The above problems affect the welding quality and reliability of aluminum alloy sheet welds

Method used

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  • Special backing plate for friction-stir welding and welding method adopting backing plate
  • Special backing plate for friction-stir welding and welding method adopting backing plate

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Embodiment Construction

[0017] The special backing plate for friction stir welding proposed by the present invention and the welding method using the backing plate will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Advantages and features of the present invention will be apparent from the following description and claims. It should be noted that the drawings are all in a very simplified form and use imprecise ratios, which are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

[0018] Such as figure 1 As shown, the anti-deformation full penetration friction stir welding process method and special backing plate provided in this embodiment, the process steps are as follows:

[0019] The first step is to complete the processing of the welded end face of the aluminum alloy plate 1, and the flatness and straightness are required to be ≤0.2mm;

[0020] In the second step, the spec...

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Abstract

The invention provides a special backing plate for friction-stir welding and a welding method adopting the backing plate. A U-shaped or V-shaped welding leakage groove is formed in the center line of the special backing plate in the length direction. The welding leakage groove is located under a weld joint so that incomplete-penetration materials on the back of the weld joint can be squeezed into the welding leakage groove. The two sides of the welding leakage groove are bevels. The angles of the bevels are determined according to deformation of the plate. Through the special backing plate for friction-stir welding and the welding method adopting the backing plate, the incomplete-penetration materials on the back of the weld joint can be squeezed into the welding leakage groove; through the subsequent incomplete-penetration grinding procedure, the incomplete-penetration materials on the back of the weld joint are removed thoroughly, and complete penetration of the weld joint is realized. The two sides of the welding leakage groove are machined into the bevels used for conducting pre-welding predeformation on aluminum alloy plates so as to offset deformation generated in the welding process. Operation is easy. The adaptability is high.

Description

technical field [0001] The invention relates to the field of welding, in particular to a special backing plate for friction stir welding and a welding method using the backing plate. Background technique [0002] As a new green solid-phase welding technology, friction stir welding has outstanding process characteristics such as low stress, low energy consumption, and no radiation, and is especially suitable for tailor welding of aluminum alloy sheets. The traditional friction stir welding process of aluminum alloy plates is prone to incomplete penetration defects and large welding deformation after welding. The above problems have affected the welding quality and reliability of aluminum alloy sheet welds. Contents of the invention [0003] In order to solve the above technical problems, the technical solution of the present invention is to provide a special backing plate for friction stir welding, which is used to fix the plates to be welded. The special backing plate...

Claims

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Application Information

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IPC IPC(8): B23K20/12B23K20/26B23K20/233
CPCB23K20/122B23K20/233B23K20/26B23K2103/10
Inventor 汤化伟徐奎崔凡尹玉环夏佩云沈浩然张聃王钟灏
Owner SHANGHAI AEROSPACE EQUIP MFG GENERAL FACTORY
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