Aero-engine film hole laser high-efficiency combined machining method

Abstract

The invention discloses an aero-engine film hole laser high-efficiency combined machining method. A long-pulse laser and ultrafast laser combined hole forming method is adopted. According to the method, firstly, a preformed hole is formed through nanosecond laser; secondly, the preformed hole is processed into the hole meeting the requirement through the ultrafast laser; the machining efficiency and machining quality are both considered, and the film hole machining efficiency is improved. As the preformed hole of a film hole is machined through long-pulse laser (rough machining), the next stepof the machining amount of ultrafast laser (finish machining) is greatly reduced. The machining efficiency is improved. The requirements for the machining efficiency during engineering machining aremet. Through the combined hole forming method, the film hole can be free of a remelting layer, burrs and splashes, and high-quality and high-efficiency machining of a low-heat influence area can be achieved.

Description

technical field [0001] The invention belongs to the technical field of laser hole making, and relates to a high-efficiency laser composite processing technology for an air film hole of an aero-engine part, in particular to a high-efficiency laser composite processing method for an air-film hole of an aero-engine. Background technique [0002] At present, most of the gas film holes of aero-engine parts are processed by EDM, laser, electro-hydraulic beam and other methods. The hole making methods of EDM and laser will cause burrs, remelted layers, heat-affected zones, microcracks, etc. on the hole wall. Defects; Although the hole-making method of electro-hydraulic beam can avoid the above defects, the efficiency is low; with the development of laser technology, ultra-fast laser hole-making technology is more and more used in hole-making, and the above defects can also be avoided. However, the power of ultrafast lasers is generally small, and the efficiency of hole making is al...

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Problems solved by technology

[0002] At present, the air film holes of aero-engine parts are mostly processed by EDM, laser, electro-hydraulic beam and other methods. The hole making methods of EDM and laser will cause burrs, remelted layers, heat-affected zones, microcracks, etc. on the hole wall. Defects; Although the hole-making method of electro-hydraulic beam can avoid the above defects, the efficiency is low; with the development of laser technology, ultra-fast laser hole-making technology is more and more used in hole-making, and the above defects can also be avoided. However, the power of ultrafast lasers is generally small, and the efficiency of hole making is also greatly affected.

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