聚苯乙烯粉选择性激光烧结的支撑烧结研究  

The Support Scanning Sintering Study on PS Powder Based on Selective Laser Sintering

作　　者：杨来侠[1] 陈梦瑶[1] Yang Laixia;Chen Mengyao(College of Mechanical Engineering, Xi’an University of Science and Technology, Xi’an 710054, China)

机构地区：[1]西安科技大学机械工程学院,西安710054

出　　处：《工程塑料应用》2016年第10期41-45,共5页Engineering Plastics Application

基　　金：863计划项目(2015AA042503)

摘　　要：为了解决聚苯乙烯(PS)粉选择性激光烧结(SLS)成型工艺中制件成型缺陷问题,通过一系列烧结实验,分析了缺陷的种类及原因,利用"二次烧结"现象,以试样Z向尺寸高度和尺寸方差为评价指标,在最优烧结工艺参数支撑扫描速度4 500 mm/s,支撑扫描间隔为3 mm下对不同层数和类型的支撑扫描进行了对比实验。结果表明,支撑扫描可有效改善制件翘曲问题,当支撑层数为8层,支撑类型为网格型时,制件质量较好。In order to solve the problem with the polystyrene powders sintered parts drawback by the selective laser sintering (SLS), the types and causes of defects were analysed through a series of sintering experiments, using the“secondary sintering”phenomenon,make Z dimension height and size variance as evaluation index, the compared experiment on different types and layers of support scanning was conducted with the optimum process parameters,the support scanning interval is 3 mm and scanning speed is 4 500 mm/s. The results show that the formation quality is improved effectively through the support scanning. When the support layer is 8 layer and the type of support is the grid type, good quality parts is obtained.

关 键 词：聚苯乙烯粉 选择性激光烧结 二次烧结 支撑扫描烧结 

分 类 号：TG439.4[金属学及工艺—焊接]