Laser etching method of three-dimensional curved surface

Abstract

The invention relates to a laser etching method of a three-dimensional curved surface, is applied to the fields of aerospace, electronic and optical devices, and solves the problem that ideal texturegraphs cannot be acquired as a conventional three-dimensional curved surface laser processing method can only be utilized to process parts with to-be-processed surface texture characteristics and processed graphs have angle change. The laser etching method comprises the following steps that: (1) a two-dimensional graph is mapped to a corresponding position of a three-dimensional curved surface model; (2) the graph is cut according to a processing region of a scanning galvanometer and laser focus depth, and central point normal vector coordinates of cut regions are calculated; (3) processing tracks of the scanning galvanometer in the cut regions are confirmed; and (4) the central point normal vector coordinates acquired in the step (2) are adopted as target point positions of five-shaft motion of a machine tool, the processing tracks of the scanning galvanometer acquired in the step (3) are adopted as processing graphs of the cut regions, scanning processing is carried out, and laser etching processing of curved surface parts is achieved.

Description

technical field [0001] The invention relates to the field of laser processing and etching, in particular to a three-dimensional curved surface laser etching method, which uses a two-dimensional scanning galvanometer and a five-axis linkage function of a machine tool to perform laser three-dimensional curved surface etching processing, and is applied to aerospace, electronic, and optical devices and other fields. Background technique [0002] In modern products, more and more large curved parts need to be processed on their surface, especially in aerospace, microelectronics and other fields. In order to meet some special functional requirements, it is necessary to process complex surfaces on the surface of some parts Textures, such as the microstructure etching of aviation satellite radome and aircraft radome, and the three-dimensional texture etching of mold cavity, etc., how to process ideal surface texture on three-dimensional curved surface with high efficiency and high p...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problem that the existing three-dimensional curved surface laser processing method can only target parts that already have surface texture characteristics to be processed, and the processed graphics will produce angle changes, so that accurate texture graphics cannot be obtained. A laser three-dimensional curved surface processing method is proposed. Surface etching method, which includes key technologies such as surface texture mapping of parts, surface graphic texture segmentation, angle calculation of projection direction, and plane projection of curved surface graphics. Through these key technologies, texture design of curved surface parts and laser three-dimensional surface texture can be realized. etching

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