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SLS 成型参数对 PA2200 拉伸试样强度 和尺寸精度的影响
Influence of SLS Forming Parameters on Strength and Dimension Accuracy of PA2200 Tensile Specimens
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- DOI:
- 作者:
- 侯高雁 1 ，郝志强 2 ，段现银 2
HOU Gaoyan 1 , HAO Zhiqiang 2 , DUAN Xianyin 2
- 作者单位:
- 1. 武汉职业技术学院 机电工程学院，湖北 武汉 430081；2. 武汉科技大学 冶金装备及其控制教育部重点实验室，湖北 武汉 430081
1. School of Electrical and Mechanical Engineering, Wuhan Polytechnic College, Wuhan 430081, China; 2. Key Laboratory of Metallurgical Equipment and Control Technology, Wuhan University of Science and Technology, Ministry of Education, Wuhan 430081, China
- 关键词:
- 激光功率；扫描速率；拉伸强度；尺寸精度
selective laser sintering; laser power; scanning speed; tensile strength; dimensional accuracy
- 摘要:
- 选择性激光烧结（ SLS ）成形工艺参数对成形件力学性能和尺寸精度有很大影响，不同的成形材料需要不同
的工艺参数组合；然而，对于 PA 材料尚缺成形参数标准。 为了解决这个问题，选用 PA2200 粉末材料，研究了激光功率
和扫描速率对成形件拉伸强度和尺寸的影响。 结果表明，以拉伸强度和尺寸精度为参考指标，结合理论分析与实验验
证，最优参数为：激光功率 40 W ，扫描速率 4 000 mm/s 。 以此参数的 PA2200 成形件拉伸强度可达 44.48 MPa ，尺寸精度
X 向、 Y 向和 Z 向相对偏差分别为 -0.41% 、 -0.40% 和 0.50%
The forming parameters of selective laser sintering (SLS) have great influence on the mechanical properties and
dimensional accuracy of forming parts, and different forming materials need different process parameters combination.
However, there is no standard of forming parameters for PA materials. In order to solve this problem, the influence of laser
power and scanning rate on tensile strength and size of forming parts was studied by using PA2200 powder material. The
results show that the optimal parameters are as follows: laser power 40 W, scanning rate 4 000 mm/s, taking tensile
strength and dimensional accuracy as reference indexes, combined with theoretical analysis and experimental verification.
With this parameter, the tensile strength of PA2200 can reach 44.48 MPa, and the relative deviations of dimension accuracy
in X, Y and Z directions are -0.41%, -0.40% and 0.50%, respectively.