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 invention relates to the technical field of laser repair, in particular to a method and device for repairing damaged blades of an integral blisk based on double laser beams. Background technique [0002] The blisk structure is a new type of structure used in advanced aero-engines. It realizes the integrated structure of blades and discs, which can greatly improve the thrust-to-weight ratio, further improve engine efficiency, and reduce fuel consumption and emissions. The manufacturing materials of the blisk are mainly 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 blade of the blisk is a complex and twisted curved surface in space, the structure is complex, and the thickness of the blade wall is thin, so it is easy to deform and give up the knife during the processing process. higher. Therefore, the manufacturing eff...

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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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