Method and system for machining threads on surface of hard and brittle material

Abstract

The invention relates to a hard and brittle material machining method, in particular to a method and a system for machining threads on the surface of a hard and brittle material. The problems of low machining precision and low machining efficiency of traditional single-point scanning machining are solved. The method comprises the steps of installing a workpiece, leveling a hard and brittle material workpiece to be machined, determining a laser focus position, determining a machining program and conducting machining. The system comprises a four-axis motion platform and a laser processing system. The laser processing system comprises a femtosecond laser, and a beam expander, a first reflector, a second reflector, a spatial light modulator, a dichroscope, a dichroscope, a two-dimensional scanning galvanometer and a field lens which are sequentially arranged in an emergent light path of the femtosecond laser. According to the method and the system for machining the threads on the surface of the hard and brittle material provided by the invention, line scanning machining is achieved on the basis of the scanning galvanometer, the machining of all single grooves layer by layer at a certain angle can be achieved when a C shaft rotates by a certain angle, and the machining of threads layer by layer can be achieved when the C shaft rotates by 360 degrees; and compared with single-point scanning, the machining efficiency and the machining precision are greatly improved.

Description

technical field [0001] The invention relates to a method for processing hard and brittle materials, in particular to a method and system for processing threads on the surface of hard and brittle materials. Background technique [0002] Hard and brittle materials are currently processed by chemical corrosion, ion beam etching or ultrafast laser processing due to their difficulty in processing and fragility. However, chemical etching has the problems of low processing accuracy, complicated process and pollution of chemical cleaning solution; ion beam etching is processed through a mask, and the processing accuracy depends entirely on the mask accuracy. Ultrafast laser processing is a kind of non-contact processing, which has no selectivity for materials, and basically all solid materials can be processed. Due to its unique physical effect and the special mechanism of material action, the thermal effect and thermal diffusion of ultrafast laser manufacturing are small, and ther...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problems of low processing precision and low processing efficiency when using the traditional single-point scanning processing method to process threads on the surface of hard and brittle materials, the present invention provides a method and system for processing threads on the surface of hard and brittle materials

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