A method and system for laser marking of three-dimensional complex surfaces

Abstract

The invention provides a laser marking method and system for a three-dimensional complex surface, comprising: performing regular division of triangular meshes on the three-dimensional complex surface; The initial action trajectory and action parameters of each stage; determine the trajectory optimization constraints in the laser marking process according to the staged initial action trajectory, and establish the marking drive feature according to the action parameters; according to the trajectory optimization constraints and marking in the laser marking process Marking the driving feature to form an optimized motion trajectory; based on the conversion of the optimized motion trajectory into motion control instructions, controlling the multi-axis DOF ​​motion of the laser head or the workpiece to complete laser marking. The invention solves the operation error caused by the precision control of the equipment itself and external interference during the laser marking process, the defocusing problem caused by the continuous change of the surface height difference of the three-dimensional complex surface, and the low-speed adjustment caused by frequent debugging and correction during the operation process. effect problem.

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 developing continuously and rapidly in recent years. [0003] Laser marking technology is to form a laser with high energy density by focusing, and then locally irradiate the surface of the workpiece, and leave permanent marks through the vaporization or chemical reaction of the surface layer of the workpiece. By making the 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, can be applied ...

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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