基于响应面法的选区激光烧结PS/PE抗拉强度预测及优化  

Prediction and Optimization of PS/PE Tensile Strength in Selective Laser Sintering based on Response Surface Methodology

作　　者：黄泽林 顿亚鹏 蒋芳[2] 易珍珍 李国彬 张超富 HUANG Ze-lin;DUN Ya-peng;JIANG Fang;YI Zhen-zhen;LI Guo-bin;ZHANG Chao-fu(School of Materials Science and Engineering,Hubei University of Automotive Technology,Shiyan Hubei 442002,China;Hubei Cultural Industry Economic Research Center(Hubei University of Education),Wuhan Hubei 430205,China;Haixi(Fujian)Institute,China Academy of Machinery Science&Technology Co.,Ltd,Sanming Fujian 365500,China)

机构地区：[1]湖北汽车工业学院材料科学与工程学院,湖北十堰442002 [2]湖北文化产业经济研究中心(湖北第二师范学院),湖北武汉430205 [3]中国机械总院集团海西(福建)分院有限公司,福建三明365500

出　　处：《机械研究与应用》2023年第2期8-11,15,共5页Mechanical Research & Application

基　　金：湖北文化产业经济研究中心开放基金项目:3D打印在熔模精密铸造“非遗”青铜器上的数字化设计研究(编号:HBCIR 2021006);湖北文化创意产业化设计研究中心基金项目:逆向扫描及3D打印技术在“非遗鄂州”青铜古镜复制上的应用研究(编号:HBCY 2111);巴楚艺术发展研究中心基金项目:逆向扫描及增材制造技术在铸造巴楚青铜器上的数字化设计研究(编号:2022-BCYS-05);大学生创新创业训练计划项目:快速成型模样精度及机械性能研究(编号:DC2019065)。

摘　　要：针对聚苯乙烯(PS)粉选区激光烧结出来的制件强度低的问题,通过添加聚乙烯(PE)粉末制备PS/PE复合粉的方式进行改善。以烧结件抗拉强度作为考察优化目标,在预热温度为110℃、扫描间距为0.2 mm的不变条件下,选取分层厚度、激光功率以及扫描速度三个因素作为影响因素,并通过响应面法建立工艺参数和抗拉强度之间的数学模型,结果表明,抗拉强度随层厚的增加而降低;随扫描速度的增加而降低;随着激光功率的增加而提升;并得出对抗拉强度影响显著的交互作用是激光功率与扫描速度。最后优化得出最佳工艺参数组合为分层厚度为0.221 mm、扫描速度为2.010 m·s^(-1)、激光功率为34.6 W,最优抗拉强度可达到4.108 MPa,大于优化前实验结果,为选区激光烧结不同粒度、多材料提供实验依据。In order to improve the low strength of sintered polystyrene(PS)powder,the PS/PE composite powder was prepared by adding PE powder.The tensile strength of sintered parts was taken as the optimization objective;under the condition of preheating temperature of 110℃and scanning interval of 0.2 mm,three factors were selected as the influencing factors:layer thickness,laser power and scanning speed.The mathematical model between process parameters and tensile strength was established by using the response surface method.The results show that the tensile strength decreases with the increase of delamination thickness;with the increase of scanning speed,it shows a decreasing trend;it increases with the increase of laser power,and the interaction between laser power and scanning speed is significant.Finally,the optimal combination of process parameters is obtained;when the laminar thickness is 0.221 mm,the scanning speed is 2.010 m·s^(-1),and the laser power is 34.6 W,the tensile strength can reach 4.108 MPa,which is larger than the experimental results before optimization.It provides experimental basis for selective laser sintering of different particle size and multiple materials.

关 键 词：选区激光烧结 聚苯乙烯 聚乙烯 抗拉强度 响应面法 

分 类 号：TF124[冶金工程—粉末冶金]