Laser peening weight-reducing method and device for riveting-altered-to-welding structure of metal thin-walled part

Abstract

The invention discloses a laser peening weight-reducing method and device for the riveting-altered-to-welding structure of a metal thin-walled part. The method includes: clamping a welded part, and scanning a weld joint position to generate a laser processing path; performing laser peening on the surfaces on two sides of the weld joint according to the laser processing path. The laser peening weight-reducing method and device has the advantages that during the laser peening on the surfaces on two sides of the weld joint, shock waves induced by laser of certain power striking on the surface of the metal thin-walled part are used to perform the peening reinforcing on the surfaces of the weld joint, and accordingly the residual tension stress of the weld joint area is eliminated, the grains of the weld joint area are refined, dislocation density is increased, and weld joint strength is increased; the deformation of the welded part is partially corrected, the dimensional precision of the part is guaranteed; the weight of the metal thin-walled part in an aerospace device can be reduced, and the weld joint of the welded structure can be optimized to increase welding quality.

Description

technical field [0001] The invention relates to the technical field of metal surface treatment and welding, in particular to a method for lightening the weight of metal thin-walled parts by riveting and welding by laser shot peening. The invention also relates to a laser shot peening lightweight device for riveting and welding structures of metal thin-walled parts. Background technique [0002] With the rapid development of my country's economy, the aerospace industry plays an increasingly important role in national production and life. In order to meet the growing domestic demand for cargo and passenger transport, aircraft such as ARJ21, C919, and Yun-20, as well as rockets such as Long March 5, have been developed and put into service one after another. Correspondingly, the aerospace manufacturing industry accounts for an increasing proportion of national production. [0003] Weight control in aerospace devices is a top priority, and it is also the main factor affecting t...

AI Technical Summary

Problems solved by technology

Although welding technology, especially high-energy beam welding technology plays an important role in the weight reduction of aerospace devices, there are still problems of welding deformation and weld strength, which have brought great harm to the normal use of aerospace vehicles. potential threat

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