Laser marking method and system for three-dimensional complex surface

Abstract

The invention provides a laser marking method and system for a three-dimensional complex surface. The method comprises the steps that regular division of triangular meshes is conducted on the three-dimensional complex surface; estimating a staged initial action track and action parameters in the laser marking process by using the divided grids and the marking lines; track optimization constraints in the laser marking process are determined according to the staged initial action tracks, and marking driving characteristics are established according to the action parameters; according to track optimization constraints and marking driving characteristics in the laser marking process, an optimized action track is formed; and converting the optimized action track into an action control instruction, and controlling the multi-axis degree-of-freedom action of the laser head or the workpiece to complete laser marking. According to the method, the problems of action errors caused by precision restriction of equipment and external interference in the laser marking process, defocusing caused by continuous change of the surface height difference of a three-dimensional complex surface and low efficiency caused by frequent debugging and correction in the action process are solved.

Description

technical field [0001] The invention relates to the technical field of laser marking, in particular to a laser marking method and system for three-dimensional complex surfaces. Background technique [0002] Laser technology occupies an important position in the field of modern high-end equipment manufacturing. As an application direction of laser technology, laser marking technology has been in continuous and rapid development in recent years. [0003] Laser marking technology is to form a high-energy-density laser by focusing, and then irradiate the surface of the workpiece locally, and leave a permanent mark through the vaporization or chemical reaction of the surface of the workpiece. By causing relative displacement between the laser and the surface of the workpiece, various forms of marks such as characters, patterns, and barcodes can be formed. [0004] The advantages of laser marking are: clear marking, high resolution, strong durability, applicable to the surface of...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the technical problems existing in the laser marking of three-dimensional complex surfaces in the prior art, including the movement error caused by the equipment's own precision constraints and external interference, and the defocus problem caused by the continuous change of the surface height difference of the three-dimensional complex surface , and aiming at the inefficiency problem caused by frequent debugging and correction during the action process, the present invention adopts the following technical solutions:

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