摘要
在选择性激光烧结技术中,成型缸内的粉末密度及其均匀性将直接影响烧结成型件的质量。为了提高铺粉的质量,以铺粉辊为研究对象,利用EDEM软件仿真铺粉过程,研究了铺粉辊的半径尺寸、平动速度,自转速度等对铺粉质量的影响规律。结果表明:当铺粉辊半径增大,粉末均匀性相应升高,而密度相对降低;平动速度达到峰值后,随平动速度上升而粉末密度减小;合适的自转速度会使成型缸中粉末密度的均匀性更好,粉末层更加平整。确定最佳工艺参数为铺粉辊半径15mm,平动速度35mm/s,自转角度1.6rad/s,此时粉层的密度4.7g/cm^(3),密度标准差为0.195g/cm^(3)。
In Selective Laser Sintering(SLS),the powder density and uniformity in the forming cylinder will directly affect the quality of the sintered parts. In order to improve the quality of powder laying,taking the powder laying roller as the research object and using EDEM software to simulate the powder laying process,the influence rules of the radius size,translational speed and rotation speed of the powder laying roller on the quality of powder laying were studied. The results showed that the powder uniformity increased with the increase of the radius of pawnshop roller,but the density decreased. After the translational velocity reaches its peak,the powder density decreases with the increase of translational velocity. The proper rotation speed will make the powder density uniformity in the molding cylinder better and the powder layer more flat. The optimal process parameters were determined to be 15 mm radius,35 mm/s translational speed and 1.6 rad/s rotation Angle of the powder roller. At this time,the density of the powder layer was 4.7 g/cm^(3) and the density standard deviation was0.195 g/cm^(3).
作者
王君
楼光宇
曾顺麒
张慧敏
WANG Jun;LOU Guang-yu;ZENG Shun-qi;ZHANG Hui-min(Center for Robotics Research,School of Mechanical Engineering,Hubei University of Technology,Hubei Wuhan 430068,China)
出处
《机械设计与制造》
北大核心
2022年第2期247-251,共5页
Machinery Design & Manufacture
基金
国家自然科学基金项目(51405140)
湖北省自然科学基金重点资助项目(2015CFA112)
湖北省教育厅优秀中青年科技创新团队资助项目(T201505)。
关键词
激光烧结
铺粉密度
铺粉均匀性
铺粉辊
工艺参数
Laser Sintering
Spreading Density
Powder Uniformity
Pave Powder Roller
Process Paramete
作者简介
王君(1977-),男,湖北蕲春人,博士研究生,教授,主要研究方向:机构学、机器人技术及增材制造技术。
