选区激光烧结PS/PMMA成形工艺优化与性能研究  

Optimization and Properties of PS/PMMA Forming Process by Selective Laser Sintering

作　　者：顿亚鹏 陈自力 蒋芳[2] 杨伟 谢知航 Dun Yapeng;Chen Zili;Jiang Fang;Yang Wei;Xie Zhihang(School of Materials Science and Engineering,Hubei University of Automotive Technology,Shiyan 442002,Hubei,China;Hubei Cultural Industry Economic Research Center(Hubei University of Education),Wuhan 430205,Hubei,China;Bachu Art Culture Research Center,Yichang 443002,Hubei,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]三峡大学巴楚艺术发展研究中心,湖北宜昌443002

出　　处：《应用激光》2023年第10期69-76,共8页Applied Laser

基　　金：湖北文化产业经济研究中心开放基金(HBCIR2021006);巴楚艺术发展研究中心基金(2022-BCYS-05);湖北省非物质文化遗产研究中心开放基金(FY-2021-23);湖北文化创意产业化设计研究中心基金(HBCY2111);教育部高教司产学合作协同育人项目(201901091006)。

摘　　要：为改善聚苯乙烯(PS)粉选区激光烧结出来的制件强度与精度低的问题,通过添加聚甲基丙烯酸甲酯(PMMA)粉末制备PS/PMMA复合粉。以制件尺寸精度、抗拉强度为指标,选取分层层厚、扫描速度、激光功率、扫描间距进行正交试验,采用极差分析法进行成形工艺优化与性能研究。结果表明,选区激光烧结PS/PMMA复合粉末烧结件尺寸精度的最优工艺参数组合为预热温度101℃、扫描速度4 m/s、激光功率20 W、扫描间距0.25 mm、分层厚度0.24 mm。该工艺参数组合下PS/PMMA复合粉末烧结的X、Y、Z三向尺寸精度分别可达到0.004、0.033、0.020。经力学性能分析,选区激光烧结PS/PMMA较激光选区烧结PS的抗拉强度提高2.4%。In order to improve the low strength and precision of selected laser sintering of polystyrene(PS)powder,the PS/PMMA composite powder was prepared by adding PMMA powder.Taking dimensional accuracy and tensile strength of the workpiece as indexes,orthogonal experiments were carried out by selecting layer thickness,scanning speed,laser power and scanning distance.The range analysis was used to optimize the forming process and study the performance.The results show that the optimal process parameters for selecting the size accuracy of PS/PMMA composite powder sintering are preheating temperature 101 C,scanning speed 4 m/s,laser power 20 W,hatch spacing 0.25 mm,and layer thickness 0.24 mm.The X,Y and Z dimensional accuracy of PS/PMMA composite powder sintering can reach 0.004,0.033,and 0.020,respectively.Through mechanical properties analysis,selected laser sintering PS/PMMA can improve the strength of SLS specimen,and the tensile strength is increased by 2.4%compared with PS sintered parts.

关 键 词：选区激光烧结 聚苯乙烯 聚甲基丙烯酸甲酯 抗拉强度 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业] TN249[电子电信—物理电子学]