A 3D laser marking method for marking deep hole structures on marking objects

Abstract

The invention discloses a 3D laser marking method for a deep hole structure provided on a to-be-marked object. The 3D laser marking method is characterized by comprising a laser unit, a focusing lens group, a vibrating mirror and a control system, wherein the control system controls the focusing lens group to control a position, in the Z-axis direction of the to-be-marked object, of a laser focus. The method comprises the following steps of: introducing a 3D model of the to-be-marked object, wherein a virtual marking surface which covers the position of a deep hole is established in a deep hole part of the to-be-marked object; introducing a marking pattern; pasting and covering the pattern; putting the to-be-marked object; reading a position relationship between the pattern and the 3D model; and marking the to-be-marked object, wherein the pattern on the position of the deep hole is directly printed on the vertical marking surface. According to the 3D laser marking method disclosed by the invention, one virtual marking surface which covers the deep hole is established in the deep hole part of the to-be-marked object, and the pattern is directly marked on the virtual marking surface when the position of the deep hole is marked, so that a condition that a Z-axis cursor instantaneously has large-distance jump is effectively avoided, damages on a regulating driver are reduced, and the service life of the regulating driver is prolonged.

Description

technical field [0001] The invention relates to the field of 3D laser marking, in particular to a 3D laser marking method for marking a deep hole structure on a marking object. Background technique [0002] 3D laser marking is a method of laser surface depression processing. It uses high-energy-density laser to partially irradiate the workpiece to vaporize the surface material or undergo a chemical reaction of color change, thereby leaving a permanent mark. Laser marking can mark various characters, symbols and patterns, etc., and the character size can even reach the micron level. The laser beam used for laser marking is generated by the laser, and after a series of optical transmission and processing, the beam is finally focused by the optical lens, and then the focused high-energy beam is deflected to the designated position on the surface of the object to be processed, forming a permanent depression. trace. The traditional 2D laser marking adopts the post-focus method,...

AI Technical Summary

Problems solved by technology

[0004] Although 3D laser marking has been realized, it still has some defects. For example, if the marking object has a deep hole structure, the pattern will be directly printed on the deep hole during the marking process, which will cause the Z-axis cursor to jump instantaneously. The variable distance is very large, which leads to the instantaneous movement of the driving device of the Z-axis adjustment driver part that controls the Z-axis focusing. If things go on like this, the Z-axis adjustment driver part is easily damaged, which greatly reduces its service life. Improve technical issues

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