• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2021, Vol. 57 ›› Issue (7): 10-17.doi: 10.3901/JME.2021.07.010

• 机器人及机构学 • 上一篇    下一篇

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机器人纵振与纵扭超声铣削稳定性对比研究

郑侃1, 廖文和1, 孙连军1, 刘丽霞2, 田威3, 薛枫1   

  1. 1. 南京理工大学机械工程学院 南京 210094;
    2. 北京卫星制造厂有限公司 北京 100190;
    3. 南京航空航天大学机电学院 南京 210016
  • 收稿日期:2020-06-11 修回日期:2020-12-21 出版日期:2021-04-05 发布日期:2021-05-25
  • 通讯作者: 郑侃(通信作者),男,1983年出生,博士,副教授。主要研究方向为机器人旋转超声加工技术。E-mail:zhengkan@njust.edu.cn
  • 作者简介:廖文和,男,1965年出生,博士,教授。主要研究方向为航空航天产品的先进制造技术。E-mail:cnwho@njust.edu.cn;孙连军,男,1992年出生,博士研究生。主要研究方向为机器人旋转超声铣削稳定性。E-mail:18751966256@163.com;刘丽霞,女,1975年出生,硕士,研究员。主要研究方向为航天器产品制造工艺、检测技术、可靠性和标准化。E-mail:zgcyxlxh@163.com;田威,男,1977年出生,博士,教授。主要研究方向为航空航天大部件智能制造技术与装备。E-mail:tw_nj@nuaa.edu.cn;薛枫,男,1995年出生,博士研究生。主要研究方向为旋转超声加工工艺。E-mail:imeimeimei@163.com
  • 基金资助:
    国家自然科学基金资助项目(51861145405,91860132,52075265)。

Comparative Study on Stability of Robotic Longitudinal Vibration and Longitudinal-torsional Ultrasonic Milling

ZHENG Kan1, LIAO Wenhe1, SUN Lianjun1, LIU Lixia2, TIAN Wei3, XUE Feng1   

  1. 1. School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094;
    2. China Academy of Space Technology, Beijing 100190;
    3. College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016
  • Received:2020-06-11 Revised:2020-12-21 Online:2021-04-05 Published:2021-05-25

摘要: 针对工业机器人铣削大型航天器舱体支架存在颤振严重导致铣削平面度较低的问题,提出了机器人纵扭超声铣削新方法。分析了纵扭超声铣削刀尖运动轨迹,对比分析了机器人一维纵向超声铣削与机器人纵扭超声铣削的稳定域,并开展了两者的铣削力和铣削表面接刀痕对比试验。计算和试验结果显示:机器人纵扭超声铣削稳定域较机器人一维纵向超声铣削提升了46.7%,各种工况下的铣削力平均降幅达到了24.7%。同时,高频扭转振动的摄入使得机器人一维纵向超声铣削表面接刀痕高度差降低了48.7%。上述结论为大型航天器舱体支架的机器人高精高效加工提供了技术基础。

关键词: 机器人加工, 机器人纵扭超声铣削, 机器人铣削稳定性, 接刀痕

Abstract: Severe chatter caused by industrial robot milling of large spacecraft cabin stents, which results in low process flatness is a knotty problem. Robotic longitudinal-torsional rotary ultrasonic milling (RRUM-LT) is proposed innovatively. Firstly, the tool tip trajectory of RRUM-LT was analyzed. Then RRUM-LT stability domain is solved and compared with robot one-dimensional longitudinal rotary ultrasonic milling (RRUM). Finally, the robotic milling experiments are carried out to contrast the milling forces and the tool marks on the machined surface between two methods. Calculation and experimental results demonstrated that the stability domain of RRUM-LT is improved 46.7% compared with RRUM. And the average reduction of milling force increased 24.7%. Meantime, the addition of high-frequency torsional vibration decreased the tool marks height on the machined surface of RRUM by 48.7%. The above conclusions provide a technical basis for high-precision and high-efficient processing of large spacecraft cabin.

Key words: robotic machining, robotic longitudinal-torsional ultrasonic milling, robotic milling stability, cutter mark

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