[1]武 帅,张 俊,贾亚龙,等.选区激光烧结的不均匀温度场对成形过程的影响分析[J].机械与电子,2015,(07):19-23.
　WU Shuai,ZHANG Jun,JIA Yalong,et al.Effects of Unbalanced Thermal Field on Manufacturing Processes in Selective Laser Sintering[J].Machinery & Electronics,2015,(07):19-23.
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选区激光烧结的不均匀温度场对成形过程的影响分析
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《机械与电子》[ISSN:1001-2257/CN:52-1052/TH]

卷:
期数:
2015年07期
页码:
19-23
栏目:
设计与研究
出版日期:
2015-07-26

文章信息/Info

Title:
Effects of Unbalanced Thermal Field on Manufacturing Processes in Selective Laser Sintering
文章编号:
1001-2257(2015)07-0019-05
作者:
武 帅; 张 俊; 贾亚龙; 王 翔
(中国科学技术大学 精密机械及精密仪器系,安徽 合肥 230027)
Author(s):
WU Shuai; ZHANG Jun; JIA Yalong; WANG Xiang
(Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei 230027, China)
关键词:
选区激光烧结;  温度场;  有限元方法;  仿真
Keywords:
selective laser sintering;  thermal field;  finite element method;  simulation
分类号:
TB44
文献标志码:
A
摘要:
选区激光烧结过程中,不均匀温度场引起的应力和变形是制约成型质量,影响成型精度的重要因素。通过有限元仿真,分析了不同扫描方式和预热保温温度情况下激光烧结的温度场,同时结合实验对不同扫描方式和预热保温温度下的应力和变形做出分析和计算。仿真和实验表明,预热保温能够有效减小烧结物的热应力,同时采用长短线交叉的扫描方式得到的烧结物应力和变形最小。
Abstract:
Stress and deformation resulting from an unbalanced thermal field have a significant effect on quality and precision in selective laser sintering. In this paper, the finite element method is applied to simulate thermal fields in different scan patterns and temperature of pre-heating and keeping warm. Meanwhile, experiments are performed to analyze and calculate stress and deformation. According to simulations and experiments, pre-heating and keeping warm can decrease the thermal stress effectively and scanning in the x-direction and the y-direction alternately can minimize the stress and deformation.

参考文献/References:

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[3] 李佳桂,史玉升,鲁中良,等.选择性激光熔化成形瞬态温度场数值模拟[J]. 中国机械工程,2008,19(20):2492-2495.
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[5] Hussein A, Hao L, Yan C, et al. Finite element simulation of the temperature and stress fields in single layers built without-support in selective laser melting[J]. Materials & Design, 2013, 52: 638-647.
[6] 周文晓,王翔,崔瑞,等. 粉末薄层选区激光烧结温度场数值模拟与实验研究[J]. 现代制造工程,2012(5):12-16,23.
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备注/Memo

备注/Memo:
收稿日期:2015-03-30
作者简介:武 帅(1991-),男,安徽宿州人,硕士研究生,研究方向为快速成型技术; 王 翔(1964-),男,安徽合肥人,副教授,研究方向为光学测量及光机电一体化技术、微纳米制造技术、光(快速)成型技术。
更新日期/Last Update: 2015-07-26