| 激光扫描路径对直接金属激光烧结温度场的影响 |
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| 引用本文： | 李昊,沈以赴,李守卫,潘琰峰,顾冬冬.激光扫描路径对直接金属激光烧结温度场的影响[J].南京航空航天大学学报,2005,37(5):638-642. |
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| 作者姓名： | 李昊 沈以赴 李守卫 潘琰峰 顾冬冬 |
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| 作者单位： | 1. 南京航空航天大学材料科学与技术学院,南京,210016;徐州空军学院航空器材系,徐州,221002
2. 南京航空航天大学材料科学与技术学院,南京,210016 |
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| 基金项目： | 国家自然科学基金委员会-中国工程物理研究院联合基金(10276017)资助项目，航空科学基金(04H52061)资助项目，南京航空航天大学科研创新基金(S0403-061)资助项目 |
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| 摘 要： | 利用有限元分析软件AN SY S,对激光烧结温度场进行了数值模拟,建立了激光烧结薄板的温度模型;运用APDL语言控制热源的热流密度、移动速度以及扫描轨迹;研究了激光行程对烧结温度场的影响,扫描端点温度场的不对称及较大的温度梯度造成了端点球化现象;激光扫描线间的耦合作用使端点球化现象随扫描线的增加而逐渐显著。根据该程序得出的模拟结果和实验结果基本一致。
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| 关 键 词： | 选区激光烧结 有限元分析 数值模拟 温度场 ANSYS |
| 文章编号： | 1005-2615(2005)05-0638-05 |
| 收稿时间： | 2005-04-29 |
| 修稿时间： | 2005-06-10 |
Effect of Scanning Path on Temperature Field in Direct Metal Laser Sintering Process |
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| LI Hao,SHEN Yi-fu,LI Shou-wei,PAN Yan-feng,GU Dong-dong.Effect of Scanning Path on Temperature Field in Direct Metal Laser Sintering Process[J].Journal of Nanjing University of Aeronautics & Astronautics,2005,37(5):638-642. |
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| Authors: | LI Hao SHEN Yi-fu LI Shou-wei PAN Yan-feng GU Dong-dong |
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| Institution: | 1, College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing,210016,China; 2. Air Materiel Department,Xuzhou Airforee Institute, Xuzhou,221002,China |
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| Abstract: | ANSYS is a finite element simulation software used to simulate the temperature field in selective laser sintering(SLS).By using the ANSYS parameter design language(APDL),the density of the thermal flow,the velocity and the path of scanning can be controlled.The effect of the scanning path on the temperature field in the SLS process is studied. Balling,which occurs at the end of the scanning line,is caused by the dissymmetric temperature field and the great temperature gradient.Because of the coupling effect between scanning lines,the balling phenomenon is more serious on subsequence scanning lines.Numerical results by using this program are in agreement with experimental results. |
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| Keywords: | selective laser sintering(SLS) finite element method numerical simulation thermal distribution ANSYS |
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