Laser rapid-forming method based on contour scanning of coated powder materials

Abstract

The invention relates to a laser quick molding method based on coating powder material figure scanning, belonging to the laser quick molding technique. The invention first uses the computer, according to the z-direction layered figure information of three-dimensional CAD mold, to control the laser beam to scan the figure of coating powder material; the coating powder material scanned by laser beam is heated and increases temperature to the solid temperature of said powder material; the outer surface coating layer of said powder material loses the solidify property, to form the ineffective division line consistent with the figure; then the piston of workbench decreases one layer to be laid with powder and scan figure until finishing the three-dimensional figure scanning; at last, heating the whole of coating powder while the attained solidified element is separated at the bound of three-dimensional figure which has lost the solidify property, to attain the three-dimensional solid. The invention can quickly make complex three-dimensional solid, with high efficiency, compactness, strength, accuracy and surface fineness.

Description

technical field [0001] The laser rapid prototyping method based on the contour line scanning of coated powder materials belongs to the technical field of laser processing rapid prototyping, and in particular relates to a method for making computer three-dimensional models into parts or samples. Background technique [0002] Laser rapid prototyping technology is a high-tech manufacturing technology that matured and began to be commercialized in the middle and late 1980s. Laser rapid prototyping technology can quickly convert the computer-aided design model (CAD model) of product parts into physical models, part prototypes or parts. Laser rapid prototyping is directly driven by the CAD model, and the corresponding physical entity can be obtained only by changing the CAD model, which greatly shortens the production cycle from conceptual model design to production of products or samples. [0003] At present, there are three main commercialized laser rapid prototyping methods: ...

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to provide a laser rapid prototyping method based on the scanning of the contour line of the coated powder material; the present invention can directly make a three-dimensional computer model into a three-dimensional entity, retains the advantages of the SLS method, and overcomes the low strength of the SLS molded body. The LOM method cannot process powder materials and other deficiencies;

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