Composite processing method and device for blade air film hole

Abstract

The invention discloses a compound processing method and device for blade air film holes, which relate to the field of special processing, through laser heating to assist drilling, and quickly drill air film holes of required size on a thermal barrier coating superalloy substrate; secondly, The high-speed rotating drill bit is used as the cathode, the blade is used as the anode, and the drill bit moves up and down to perform online electrolytic post-treatment on the gas film holes of the metal substrate to eliminate residual stress and heat-affected zone defects during the drilling process; at the same time, the electrolyte is suspended There are tiny abrasive particles, driven by the high-speed rotating drill bit, to perform micro-impact scratches on the hole wall, resulting in a similar grinding and polishing effect, and further improving the overall inner wall quality of the gas film hole including the thermal barrier coating. The method is simple and easy, the laser transmission is not affected by the surrounding environment, the environment adaptability is strong, and there is no need for multiple tool setting, which solves the problem that the conventional electrical machining method cannot process the thermal barrier coating, and the laser processing single crystal alloy has low efficiency and easily generates heat. defects such as damage.

Description

technical field [0001] The invention relates to the technical field of special processing, in particular to a composite processing method and device for laser-assisted drilling, electrolysis, and post-polishing treatment of air film holes in a blade with a thermal barrier coating. Background technique [0002] Increasing the combustion gas temperature at the turbine part is an important means to improve the performance of the aero-engine. However, limited by the performance of the engine blade material, excessive temperature will cause the blade metal material to fail. A layer of ceramic-based material is prepared on the surface of the blade at the high-temperature end of the engine to form a thermal barrier coating to separate the high-temperature gas from the metal material of the blade, thereby achieving the purpose of protecting the blade and slowing down the temperature rise. At the same time, a cold air channel is left inside the blade, and micro-holes are drilled on ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the present invention provides a composite processing method and device for performing laser-assisted drilling, electrolysis, and post-polishing post-treatment on superalloy blades with thermal barrier coatings, so as to solve the problem that conventional electrical processing methods cannot process thermal Barrier coatings, and ultrashort pulse laser processing of single crystal alloys have disadvantages such as low efficiency and thermal damage

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