Segmented defocusing laser polishing method for turbine guide vane of oxygenerator

Abstract

The invention provides a segmented defocusing laser polishing method for a turbine guide vane of an oxygenator. The rough surface of the turbine guide vane is efficiently polished in a laser polishingmode, and segmented defocusing polishing is conducted on the irregular rough surface of the turbine guide vane by means of the characteristic that laser polishing equipment has the same polishing effect under different defocusing amounts; according to the method, according to the defocusing amount range of the laser polishing equipment and the size and shape of the turbine guide vane, the to-be-polished side surface of the turbine guide vane is segmented, and in the defocusing amount range with the same polishing effect, laser polishing is conducted on different segments, so that full-coverage polishing of the irregular surface of the guide vane can be achieved; with adoption of the method, the problems of ultrahigh cost and complex control system caused by introduction of a manipulator and a three-dimensional galvanometer for polishing of irregular curved surfaces are avoided, and the method has the characteristics of high machining precision, simple technological process and small influence on a base material.

Description

technical field

[0001] The invention relates to a segmented defocused laser polishing method for turbine guide vanes of an oxygen generator. Background technique

[0002] Laser polishing is a new type of laser processing technology. It acts on the rough original metal surface through a focused laser beam spot, causing the metal material surface to protrude and produce thin layers of melting and evaporation, and due to the surface tension and gravity of the material itself Flow occurs due to the action, fills the depressions on the metal surface and solidifies, and finally obtains the ideal surface of the polishing material. Because laser polishing only works on the material layer with a thickness of micron, it has higher processing precision than ordinary laser beam processing metal. It has the incomparable advantages of traditional polishing such as less environmental pollution, high polishing precision, wide range of polishing materials, and small area polishing. [0003...

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