摘要
将选择性激光烧结技术应用于人造石墨粉末成形,探索其回收循环再利用的可能性。研究了球形石墨粉末的加入量对人造石墨/酚醛树脂混合粉末流动性和堆积密度的影响,确定了石墨3D打印材料配方组成;研究了激光功率、扫描速度、扫描间距和分层厚度等工艺参数对石墨原型件的成形精度和抗弯强度的影响,确定了各工艺参数的取值范围;最后通过正交实验确定了最优工艺参数组合,并快速制备了复杂石墨功能件,验证了新工艺的可行性。
SLS process was applied to artificial graphite powders,the possibility of recycling and reutilization was explored.Firstly,effects of different mass fractions of spherical graphite powders on the fluidity and bulk density of mixed powders were studied,thus the reasonable composition of graphites for 3D printing materials was determined.Secondly,effects of different process parameters of laser power,scanning speed,scanning spacing and layer thickness on directional dimensions and bending strength of samples were studied,the ranges of parameters were decised.Finally,the optimum process parameters were determined by orthogonal experiments,the complex graphite functional parts were fabricated quickly,and feasibility was verified.
作者
吴海华
张成
李亚峰
刘力
徐李杰
WU Haihua;ZHANG Cheng;LI Yafeng;LIU Li;XU Lijie(College of Mechanical & Power Engineering, China Three Gorges University, Yichang, Hubei, 443002)
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2020年第15期1838-1845,共8页
China Mechanical Engineering
基金
国家自然科学基金资助项目(51575313)。
关键词
人造石墨粉末
选择性激光烧结成形工艺
混合粉末流动性
工艺参数
工艺参数组合
artificial graphite powder
selective laser sintering(SLS)process
flexural strength of mixed powder
process parameter
combination of process parameter
