Ultra-fast pulse laser-cold spraying surface processing method for thin-wall structure

Abstract

The invention provides an ultra-fast pulse laser-cold spraying surface processing method for a thin-wall structure. The method is mainly used for solving the surface defect problem of a metal thin-wall structure so as to achieve the rapid and high-quality repair. According to the technical scheme, the method comprises the following steps that firstly, a thin-wall structure defect surface model isconstructed based on a three-dimensional measurement reverse reconstruction technology; a process parameter database is built by combining with an artificial intelligence technology; the trajectory ofeach movement part is reasonably planned through a robot technology; the powder particle flow state is restrained through a powder charged device; and an ultra-short pulse laser technology is introduced into a cold spraying repair technology, and rapid repair on the surface of a metal thin-wall component is achieved. By applying the processing method, the problems of deformation and reduction onperformance of the aluminum alloy thin-wall structure caused by high heat input in a conventional laser cold spraying process can be solved, and meanwhile, the rapid surface repair with high process stability and high quality reliability can be realized.

Description

technical field [0001] The invention relates to the field of surface repair of thin-walled metal parts, in particular to an ultrafast pulse laser-cold spray surface processing method for thin-walled structures. technical background [0002] With the development of the international aerospace industry, how to reduce the cost of space launch is one of the main challenges faced by the entire aerospace industry, and realizing the reuse of launch vehicles is an important measure to reduce costs. Thin-walled high-strength aluminum alloys are mostly used for aerospace recycling parts, and the rework temperature must be controlled below the aging temperature of high-strength aluminum alloys. Therefore, conventional methods such as fusion welding and solid-phase welding cannot be used for repairing. [0003] At present, representative metal component repair technologies mainly include laser cladding, plasma spraying, and supersonic cold spraying. Laser cladding repair technology is ...

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Problems solved by technology

[0005] In view of the above problems and research, the present invention introduces the ultrashort pulse laser into the cold spray repair technology, and combines the deep convolutional neural network method in the AI ​​technology, the powder charging device and the robot trajectory planning technology to form a thin-walled structure ultrafast The pulse laser-cold spray surface processing method solves the problems of structural deformation and performance degradation caused by existing cold spray and conventional laser cold spray repair processes, and realizes surface repair with high process stability and quality reliability

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