Method and device for improving forming quality of laser additive manufacturing thin-wall parts

Abstract

The invention provides a method and device for improving the forming quality of laser additive manufacturing thin-wall parts. The device comprises a movable platform system, a laser metal deposition system, an auxiliary forming system, an active cooling system and a central control system. According to the forming method, when the laser metal deposition system conducts cladding forming on the thin-wall parts, the auxiliary forming system controls the thin-wall thicknesses and the forming directions in real time; when the multiple layers of the thin-wall parts are deposited, the problem of molten pool flowing caused by interlayer stacking can be solved, and the problem that the surface roughness in the thin-wall forming process is excessively large due to interlayer stacking is solved, andthe thickness-changeable thin wall, the flat thin wall and the curved thin wall are machined; and meanwhile, the active cooling system cools deposited layers in real time. The problems that the quality of the laser cladding formed surfaces is low; during continuous multiplayer depositing, the temperature is increased, therefore, thermal stress of the deposited layers is accumulated, consequently the deposited layers are cracked, and microstructures of the deposited layers are coarse; and the forming efficiency is low due to slow cooling are solved, and high-quality and efficient forming of thecomplex thin-wall parts is achieved.

Description

technical field [0001] The invention belongs to the technical field of laser additive manufacturing, and in particular relates to a method and a device for improving the forming quality of thin-walled parts manufactured by laser additive manufacturing. Background technique [0002] At present, metal additive manufacturing technology mainly includes electron beam wire melting technology, electron beam selective melting technology, laser selective melting technology and laser cladding forming technology. Electron beam wire melting technology and electron beam selective melting technology require high environmental vacuum and small forming space, which limits the size of formed parts, and for parts with complex, fine and thin-walled shapes, the forming accuracy is limited due to the thick arc column. Poor, the fineness, precision and thin-walled degree of forming are not as good as the laser cladding forming method, and it is difficult to obtain parts that are finer and thinner...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies in the prior art, the present invention provides a device and method for improving the forming quality of thin-walled parts manufactured by laser additive manufacturing, which solves the problem that the limit size of the molten pool exists in the existing laser additive manufacturing of thin-walled parts. In order to efficiently and high-quality manufacture thin-walled components

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