滚筒振动对铺粉质量影响的离散元模拟

doi:10.3969/j.issn.1004-132X.2020.14.011

中国机械工程 ›› 2020, Vol. 31 ›› Issue (14): 1717-1723.DOI: 10.3969/j.issn.1004-132X.2020.14.011

滚筒振动对铺粉质量影响的离散元模拟

张江涛^1,2, 谭援强^1,2, 包涛^1,2, 徐仰立^1,2, 姜胜强³

1. 华侨大学制造工程研究院, 厦门, 361021;
2. 脆性材料产品智能制造技术国家地方联合工程研究中心, 厦门, 361021;
3. 湘潭大学机械工程学院, 湘潭, 411105

收稿日期:2020-01-21 出版日期:2020-07-25 发布日期:2020-08-26
通讯作者: 谭援强(通信作者),男,1966年出生,教授,博士研究生导师。研究方向为制造工艺过程模拟及优化、离散元方法及应用、摩擦学及应用、新型传动技术及应用。发表论文60余篇。E-mail:tanyq@hqu.edu.cn。
作者简介:张江涛,男,1992年生,博士研究生。研究方向为增材制造。发表论文3篇。E-mail:zhangjiangtao@stu.hqu.edu.cn。
基金资助:
国家自然科学基金资助项目（11772135）；厦门市科技计划资助项目（350Z20173048）；华侨大学研究生科研创新能力培育计划资助项目（18011080013）；湖南省教育厅科研基金资助项目（18B074）

Discrete Element Simulation for Effects of Roller's Vibrations on Powder Spreading Quality

ZHANG Jiangtao^1,2, TAN Yuanqiang^1,2, BAO Tao^1,2, XU Yangli^1,2, JIANG Shengqiang³

1. Institute of Manufacturing Engineering, Huaqiao University, Xiamen, Fujian, 361021;
2. National&Local Joint Engineering Research Center for Intelligent Manufacturing Technology of Brittle Material Products, Huaqiao University, Xiamen, Fujian, 361021;
3. School of Mechanical Engineering, Xiangtan University, Xiangtan, Hunan, 411105

Received:2020-01-21 Online:2020-07-25 Published:2020-08-26

摘要/Abstract

摘要： 以Al₂O₃陶瓷粉末为研究对象，建立了Al₂O₃陶瓷粉末流动的离散元方法模型。针对增材制造铺粉工艺中滚筒振动对粉床质量的影响问题，模拟滚筒振动方向、振幅和频率对粉床的密实性、均匀性和平整度的影响规律。仿真结果表明：滚筒轴向振动可提高粉床密实性和均匀性，却会导致粉床平整度变差；滚筒径向振动会导致较差的粉床平整度，当振幅大于8 μm时，颗粒的压缩和回弹效应导致粉床质量显著降低；滚筒切向振动可以提高粉床的密实性和均匀性，对粉床平整度影响很小，但切向振动频率过高容易引起粉末飞溅。研究表明在切向方向对滚筒施加低频的振动可以有效提高增材制造粉床质量。

关键词: 增材制造, 滚筒振动, 粉床质量, 离散元方法

Abstract: Al₂O₃ ceramic powder was selected as research object, and a DEM model of Al₂O₃ ceramic powder flow was established. Aiming at the effects of roller's vibrations on powder-bed quality in additive manufacturing powder spreading processes, the effects of roller's vibration directions, amplitudes and frequencies on the compactness, uniformity and flatness of powder-beds were simulated. The simulation results show that the roller's axial vibrations may improve the compactness and uniformity of powder-beds, while will cause powder-bed flatness to deteriorate. The roller's radial vibrations may lead to poor powder-bed flatness. When the vibration amplitude is greater than 8 μm, powder-bed quality is significantly worse due to compression and rebound effect of particles. The roller' tangential vibrations may improve the compactness and uniformity of the powder-beds, and have little effects on the flatness of the powder-beds. However, it is easy to cause powder splash when the frequencies of tangential vibrations are too high. This study shows that applying low-frequency vibrations to rollers in the tangential directions may improve the powder-bed quality effectively in additive manufacturing processes.

Key words: additive manufacturing, roller's vibration, powder-bed quality, discrete element method(DEM)

中图分类号:

TG48

张江涛, 谭援强, 包涛, 徐仰立, 姜胜强. 滚筒振动对铺粉质量影响的离散元模拟[J]. 中国机械工程, 2020, 31(14): 1717-1723.

ZHANG Jiangtao, TAN Yuanqiang, BAO Tao, XU Yangli, JIANG Shengqiang. Discrete Element Simulation for Effects of Roller's Vibrations on Powder Spreading Quality[J]. China Mechanical Engineering, 2020, 31(14): 1717-1723.

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滚筒振动对铺粉质量影响的离散元模拟

Discrete Element Simulation for Effects of Roller's Vibrations on Powder Spreading Quality

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