摘要
以聚苯乙烯粉末为实验材料,以尺寸精度作为评价指标,研究了激光功率、扫描间距、单层厚度、扫描速度及它们的交互作用对选择性激光烧结制件成型精度的影响,通过响应面法建立了工艺参数与尺寸精度之间的数学模型,得出了最优的工艺参数。研究结果表明,尺寸偏差率随激光功率与扫描速度的增大而减小,随单层厚度的增大先增大后减小,随扫描间距的增大而增大;激光功率和单层厚度及扫描间距和单层厚度的交互作用对尺寸偏差率影响较显著;响应面预测值与实际值最大误差低于7%。
Taking polystyrene powder as experimental material and dimensional accuracy as evaluation index,we study the effects of laser power,scanning pitch,layer thickness and scanning speed and their interactions on the forming precision of selective laser sintering parts.The mathematical model between process parameters and dimensional accuracy are achieved and the optimal process parameters are obtained by response surface methodology.The research results show that the dimensional deviation rate decreases with the increase of laser power and scanning speed,increases at first and then decreases with the increase of layer thickness,and increases with the increase of scanning pitch.The interaction between laser power and single layer thickness and the interaction between scanning pitch and layer thickness have a significant effect on the dimensional deviation rate.The maximum error between the predicted value of the response surface method and the actual value is less than 7%.
作者
鄢然
李浩
李军超
朱丽
Yan Ran;Li Hao;Li Junchao;Zhu Li(Mechanical college y Chongqing University of Technology,Chongqing 400054,China;College of Materials science and engineering,Chongqing University,Chongqing 310027,China)
出处
《中国激光》
EI
CAS
CSCD
北大核心
2019年第3期130-137,共8页
Chinese Journal of Lasers
基金
国家自然科学基金(51775069)
重庆市教育委员会科学技术研究项目(KJQN201801118)
关键词
激光技术
选择性激光烧结
响应面法
尺寸精度
聚苯乙烯粉末
laser technique
selective laser sintering
response surface methodology
dimensional accuracy
polystyrene powder