A method of laser repairing and polishing ceramic parts

Abstract

The invention discloses a method for repairing and polishing ceramic parts through laser. The method comprises the steps of S1, cleaning the ceramic part, and assembling the ceramic part to a three-dimensional moving platform; S2, scanning the surface contour of the ceramic part, comparing the scanned contour model with a standard model, and dividing the surface of the ceramic part into an etching region, a polishing region and a sintering region; S3, processing the etching region by using excimer laser equipment; S4, carrying out preset powder feeding on the sintering region, and carrying out sintering repair by using long-wavelength laser; S5, carrying out rough polishing on the sintering region; S6, carrying out overall polishing on the processing area; and S7, scanning the surface roughness of the ceramic part, executing the step S6 if the roughness does not meet the requirement, and completing the excimer laser polishing process if the roughness meets the requirement. The method has the advantages that the controllability is good, the automatic production can be realized conveniently, the precise processing of the micro-area can be realized, any curved surface and any part can be treated, the influence on a ceramic matrix is remarkably reduced, and the precision, the quality and the efficiency of part repairing and polishing are guaranteed.

Description

technical field [0001] The invention relates to the field of laser processing, in particular to laser repair and polishing of ceramic parts. Background technique [0002] Structural ceramics have excellent properties such as high temperature resistance, wear resistance, corrosion resistance, oxidation resistance, and high strength. They are widely used in aerospace, machinery, electronics, energy, chemical and other fields. They are the ends of aircraft burner components and intercontinental missiles. , bearings, balls, mechanical seal components, molds and other important materials. However, the characteristics of high hardness and high brittleness of ceramics make its molding and processing difficult, and it is easy to produce insufficient surface size and surface defects such as micro-cracks, pores, and micro-area spalling. During use, micro-plastic deformation and micro-cracks may also be caused by wear or heating. , Seriously affect the surface quality and precision of...

AI Technical Summary

Problems solved by technology

[0004] However, due to the purpose of reducing surface roughness through micro-removal, polishing treatment cannot completely eliminate the existing deep pores and cracks on the surface, and cannot solve the problem of micro-insufficiency caused by part deformation or excessive molding shrinkage, and cannot increase the size of the part. Accuracy or Shape Accuracy

In order to achieve the ideal state of ceramic parts, it often requires a variety of repair processes and polishing treatments to cooperate. Multiple clamping and processing will significantly affect the yield, processing efficiency, and dimensional accuracy of the parts.

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