Damaged blade repairing method and device for blisk based on double laser beams

Abstract

The invention provides a damaged blade repairing method for a blisk based on double laser beams. The method comprises the following steps: 110, damaged areas of target damaged blades of the to-be-repaired blisk are removed; 120, three-dimensional model data of the target damaged blades are obtained, and a repair scheme is determined; 130, the target damaged blades of the to-be-repaired blisk are subjected to unit layering one by one, and composite additive manufacturing of double-laser-beam liquid micro-forging is conducted according to the repair scheme; and 140, polishing treatment is conducted on the repaired parts of the target damaged blades of the blisk. In a molten pool state repairing layer formed through laser cladding, impact waves are applied to the molten pool state repairing layer through pulse lasers, pressure and vibration are generated in the repairing layer, gas exhausting and air hole reducing are facilitated, repairing is more uniform, internal stress of the repairing area is removed, grains are refined, surface pressure stress is improved, and the repairing internal quality and mechanical and mechanical comprehensive performance are improved.

Description

Technical field [0001] The present invention relates to the technical field of laser repair, and specifically to a method and device for repairing damaged blades of an integral leaf disk based on dual laser beams. Background technique [0002] The integral blisk structure is a new structure used in advanced aeroengines. It achieves an integrated structure of blades and discs, which can greatly increase the thrust-to-weight ratio, further improve engine efficiency, and reduce fuel consumption and emissions. The blisk manufacturing materials mainly use high-performance metal materials such as titanium alloys and high-temperature alloys, and advanced composite materials such as titanium-based and titanium-aluminum compounds. The blades of the blisk are complex and twisted curved surfaces in space. The structure is complex and the blade wall thickness is thin. Therefore, it is easy to deform and give way during the processing. The blade processing is easy to produce distortion, ...

AI Technical Summary

Problems solved by technology

However, these technologies generally have some common technical problems, such as internal defects such as pores, incomplete fusion, cracks and shrinkage porosity, etc. These internal defects seriously affect the internal quality, mechanical properties and service safety of the repaired parts.

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