Simulation of Selective Laser Melting 3D Printing by Coupled Heat Transfer Models

• Main Authors: Wei-HaoTseng, 曾韋豪
• Other Authors: Chi-chuan Hwang
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/uruebu

碩士 === 國立成功大學 === 工程科學系 === 103 === Metal 3D printing has been considered as one of the most advanced technology in 3D printing. It can be applied to most industry and brings most benefit for 3D printing market. The main technologies of Metal 3D printing include selective laser sintering(SLS) and se-lective laser melting(SLM). Both above of technologies are the same concept. First, make the materials,such as powders, be laid on the platform(xy-plane). Second, focus on the po-sition we want to form by high-energy laser and make the materials be melted and fusion. Final, repeat the above two step on different platform(z-axis) to get the products. The high-energy laser equipments for 3D printing are too expensive to do experiment. This arti-cle bulit a simulation model for SLM of 3D printing by COMSOL. COMSOL is a com-monly used software to solve engineering problems with user defined PDE and mutiphys-ics couplied. Couple heat conduction and radiative heat transfer by COMSOL and obtain an optimal processing parameters according to the different material properties (density, specific heat, etc.), laser parameters (power, frequency, etc.) inputted.