Laser machining method for fine scribing structure at ceramic surface

Abstract

The invention discloses a laser machining method for a fine scribing structure at a ceramic surface. The method comprises the steps of peeling coatings on optical fibers and paving onto the ceramic surface; scanning and radiating an optical fiber covering area on the ceramic surface with a picosecond pulse width laser, using the picosecond pulse width laser to generate a local optical field enhancing effect by the guide of the optical fibers on the ceramic surface and machining grooves at the ceramic surface; setting laser parameters according to the groove machining conditions in the step II, scanning and radiating the optical fiber covering area paved on the ceramic surface by using the picosecond pulse width laser, and machining a fine groove array same as the optical fibers in arrangement on the ceramic surface. The picosecond pulse width laser beam is guided by adopting the optical fibers, the ceramic surface with high-melting point, high-hardness and high-brittleness physical properties is obtained, multiple fine scribing lines can be obtained at the same time, edges of the scribing lines have no cracks and heat affected zones and are smooth, the size diameters of the lines are uniform, and the minimal diameter limitation of the focus light beams on the scribing line diameter is broken through.

Description

technical field [0001] The invention relates to the technical field of ceramic surface processing, in particular to a laser processing method and system for a fine-grained structure on a ceramic surface, which is suitable for processing a two-dimensional fine-grained structure on a ceramic surface. Background technique [0002] Ceramic materials have the characteristics of light weight, high temperature resistance, corrosion resistance, high strength and good chemical stability. It is because of their good physical and chemical properties that they are widely used in the fields of electronics, aviation, machinery and biomedicine. For example, the ceramic anilox roller, which is the heart of flexographic printing, is the most critical component to ensure the quality of ink transfer and ink distribution. It is necessary to process fine line structures such as mesh cells or linear grooves on the ceramic surface. Such material surface microstructure manufacturing is currently wi...

AI Technical Summary

Problems solved by technology

At present, the laser processing of the fine structure on the surface of the material is generally processed by direct irradiation of the laser beam. The line width accuracy of the structure is limited by the spot size, and the structure quality is often unable to avoid the existence of fine cracks and recondensation layers due to the influence of the pulse width.

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