Novel 3D printing laser scanning method

Abstract

The invention provides a novel 3D printing laser scanning method. The method comprises the following steps: setting the width between every two adjacent parallel lines in a parallel line set, and setting an included angle between the parallel line set and a central axis of a second-dimensional coordinate plane according to the shape of a section and based on the target of dividing the section into similar areas as many as possible; dividing the section into a plurality of unit graphics through a plurality of parallel lines; and setting a scanning line direction according to the property of laser forming powder, and then planning to obtain a scanning path of each unit graphic. The method has the advantages that each section is divided into the plurality of unit graphics of which the geometric properties are as similar as possible, and each unit graphic is treated as a scanning area, so that the laser scanning quality is uniform, and the anisotropy of the whole part can be inhibited; and random and incremental line width variation modes are set for the section of each layer, so that the fixation properties of combined surfaces of areas can be avoided during the layered overlapping process, and as a result, the risk caused by cracks can be reduced.

Description

technical field [0001] The invention belongs to the technical field of metal powder laser melting additive manufacturing, and in particular relates to a new method of 3D printing laser scanning. Background technique [0002] 3D printing technology, also known as metal material additive manufacturing technology and laser rapid prototyping technology, has been from the original principle-based device for manufacturing parts models to the current industrialized terminal parts production equipment, but it has been more than 30 years since its emergence. history, and the potential of its application development has increasingly attracted the attention of the international community. The development level of the future manufacturing industry is still one of the key symbols to measure the overall strength of a country. Driven by the development of related technologies such as numerical control technology, computers, machinery, and materials, future manufacturing technology will ine...

AI Technical Summary

Problems solved by technology

The main disadvantage of this laser scanning method is that the length of the scanning line is directly determined by the contour of the identified closed unit graphics, which has great uncertainty, especially the uneven quality of laser scanning, which is easy to cause various defects in the entire part. Anisotropy issues, therefore, have the disadvantage of limited scan quality

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