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Friction stir welding method for circumferential seam of launch vehicle tank

A friction stir welding and launch vehicle technology, which is applied in welding equipment, non-electric welding equipment, metal processing equipment, etc., can solve the problems of cracks, high specific strength, large pores, etc., and achieves light weight, improved reliability, and small size. Effect

Active Publication Date: 2017-05-31
SHANGHAI AEROSPACE EQUIP MFG GENERAL FACTORY
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Problems solved by technology

[0002] The traditional welding manufacturing process of the bottom of the launch vehicle tank in my country is the TIG welding method. Since the bottom material of the tank is usually made of aluminum alloy with low density and high specific strength, there are a large number of pores, cracks or similar cracks in the product after welding.

Method used

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  • Friction stir welding method for circumferential seam of launch vehicle tank
  • Friction stir welding method for circumferential seam of launch vehicle tank
  • Friction stir welding method for circumferential seam of launch vehicle tank

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Embodiment Construction

[0028] It can be seen from the background technology that the traditional welding process of the bottom of the carrier rocket tank in my country is TIG welding, but the quality of this welding process is poor. Friction stir welding can improve the welding quality, but friction stir welding needs to solve the internal problem of support.

[0029] The inventors have conducted research on the above problems, and in the present invention provide a friction stir welding welding tensioning device for the girth seam of the carrier rocket tank. Hereinafter, the present invention will be described in more detail. However, this invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0030] combined reference figure 1 and figure 2 , the frictio...

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Abstract

The invention discloses a friction stir welding method for a circumferential seam of a launch vehicle tank. The method comprises the steps as follows: firstly, installing a tightening device in the tank, and keeping the tightening device in a contracted state; secondly, performing excircle location outside the tank; thirdly, enabling the tightening device to extend for tank interior location; fourthly, welding the circumferential seam.

Description

technical field [0001] The invention relates to a welding tightening technology of a friction stir welding machine tool, in particular to a friction stir welding welding method for a circular seam of a storage tank of a carrier rocket. The device is suitable for friction stir welding welding machine tools. Background technique [0002] The traditional welding manufacturing process of the bottom of the launch vehicle tank in my country is the TIG welding method. Since the bottom material of the tank is usually made of aluminum alloy with low density and high specific strength, there are a large number of pores, cracks or similar cracks in the product after welding. . In order to improve the market competitiveness of launch vehicle products, rocket manufacturers are required to continuously improve the quality and performance of rockets, reduce manufacturing costs, and urgently need to adopt new connection technologies. [0003] Friction stir welding is a new type of solid-ph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/12B23K20/26
CPCB23K20/12B23K20/26
Inventor 范振昌林名润
Owner SHANGHAI AEROSPACE EQUIP MFG GENERAL FACTORY
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