Laser power adjusting method and system

Abstract

The invention discloses a laser power adjusting method and system. The laser power adjusting method comprises the steps that a three-dimensional model of a manufacturing object is obtained; the three-dimensional model is cut into slices according to the set height threshold value, and a plurality of slice bitmaps are obtained and comprise a plurality of pixel points; the first pixel points of theoutline boundaries of the slice bitmaps are extracted; whether the distances between the second pixel points existing in the slice bitmaps and the first pixel points are within the distance thresholdvalue range or not is judged; if yes, the second pixel points are determined to be to-be-processed pixel points; if not the second pixel points are determined to be unprocessed pixel points; the firstpixel points and the to-be-processed pixel points are processed through the Gaussian filter function, and processed pixel points are obtained; the gray value of the processed pixel points and the gray value of the to-be-processed pixel points are obtained; and the laser power when the processed pixel points and the unprocessed pixel points are scanned is adjusted according to the gray values.

Description

technical field [0001] The invention relates to the technical field of laser additive manufacturing, in particular to a laser power adjustment method and system. Background technique [0002] Laser additive manufacturing technology is a kind of additive manufacturing technology. The laser with high energy density is used to irradiate liquid or powder materials to change the properties of the materials. By moving and scanning each layer of the laser, it is completed layer by layer. The model is manufactured in its entirety. [0003] However, the research on the complex internal model shows that it has the following problems: (1) When printing a model with a complex internal structure, such as a common hollow lattice model, if the laser power at the boundary is too high when sintering the contour boundary area, The heat is concentrated between the sintered area and the non-sintered area. After the laser irradiation, the powder molten pool moves to the non-sintered area, and t...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is a laser power adjustment method and system, which is used to adjust the power of the scanning laser to solve the problem of poor molding size accuracy caused by heat accumulation in densely distributed areas of complex shapes

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