Optimization of Support Structures Based on Numerical Simulation of SLM Temperature Field

被引：0
|
作者：
Huang R. [1 ]
Dai N. [1 ]
Cheng X. [1 ]
机构：
[1] College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing
来源：
Dai, Ning (dai_ning@nuaa.edu.cn) | 1600年 / Chinese Mechanical Engineering Society卷 / 31期
关键词：
Heat conduction; Selective laser melting(SLM); Support structure; Temperature field;
D O I：
10.3969/j.issn.1004-132X.2020.19.011
中图分类号：
学科分类号：
摘要：
Support structures were required in SLM processes to support overhanging features in order to hold the work piece in the place and remove heat away from the processes. If heat accumulation in overhangs was too large, it would cause defects such as warpage, collapse, residual thermal stress,et al. Therefore, the influences of support structures on the temperature field of SLM were studied, and support structures with good comprehensive heat conduction were designed. Firstly, a three-dimensional finite element model of SLM was established. Then, the influences of the traditional support structures on the temperature field were studied. Finally, support structures were designed and optimized based on the numerical simulation results. It was verified by finite element analyses and manufacturing experiments. Results show that compared with the traditional support structures, the top sintering layers of the thin plates supported by the new support structures have the lowest average node temperature and small temperature difference, showing good comprehensive heat conduction, and the degree of warpages of the thin plates is significantly reduced. © 2020, China Mechanical Engineering Magazine Office. All right reserved.
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页码：2346 / 2354
页数：8
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