Laser power adjusting method and system

A technology of laser power and adjustment method, which is applied in processing and manufacturing, manufacturing auxiliary devices, processing data acquisition/processing, etc., can solve the problems of poor forming dimensional accuracy and achieve the effects of improving forming accuracy, reducing heat concentration, and overcoming heat accumulation

CN108297402AInactive Publication Date: 2018-07-20HUAZHONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-07-20
Estimated Expiration
Not applicable · inactive patent

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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.
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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...

Examples

Embodiment Construction

[0055] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0056] The object of the present invention is a laser power adjustment method and system, which are 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.

[0057] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjuncti...