Large-breadth laser marking method and equipment

Abstract

The invention relates to the technical field of laser marking, and discloses a large-breadth laser marking method. The large-breadth laser marking method comprises the steps that a laser is adjusted to be focused on the surface of a workpiece, so that the focal lengths of all positions in the range from the laser to the surface of the workpiece are consistent, wherein the surface of the workpiececomprises a plurality of marking areas; and marking is carried out in sequence in the plurality of marking areas according to a preset marking path, when marking is carried out in any one marking area, light spot diameter correction parameters corresponding to the marking areas are acquired according to a preset light spot diameter correction table, the diameters of light spots focused by the laser are corrected in the marking areas according to the light spot diameter correction parameters, and laser marking is carried out according to the corrected light spot diameters. According to the large-breadth laser marking method, the sizes of the focused light spots formed by the laser on the processed workpiece are consistent, the marking thickness and depth are consistent, the marking effect is uniform, and the marking precision is high; and in addition, the invention further provides equipment for implementing the method.

Description

technical field [0001] The invention relates to the technical field of laser marking, in particular to a large-format laser marking method and equipment. Background technique [0002] With the increasing application of laser technology, the quality requirements of laser processing technology in the market are also getting higher and higher. If uniform laser marking is required on the surface of a large-format workpiece, the traditional laser marking method is to use high-power Lasers and large-range F-theta lenses (linear imaging lenses) are used for large-scale marking. This laser processing method has objective defects: due to the objective shortcomings of optical devices and installation accuracy, the entire work of large-range F-theta lenses There will be inconsistencies in the size of the focused spot and the inconsistency of the laser energy density in the plane, which will lead to the inconsistency in the thickness and depth of the middle and edge lines in the actual ...

AI Technical Summary

Problems solved by technology

[0006] The embodiment of the present invention provides a large-format laser marking method and equipment. The purpose is to solve the inconsistency of the focused spot size formed on the workpiece after the existing laser marking technology adopts an optical focusing lens such as an F-theta lens. The energy density is inconsistent, the marking thickness and depth are inconsistent, the marking effect is uneven, and the marking accuracy is not enough

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