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应用科学学报 ›› 2006, Vol. 24 ›› Issue (3): 311-315.

• 论文 • 上一篇    下一篇

RPFEM在正交切削分析中的应用研究

李言1, 朱江新1,2, 肖继明1, 李淑娟1, 李鹏阳1   

  1. 1. 西安理工大学机仪学院, 陕西西安 710048;
    2. 广西大学机械工程学院, 广西南宁 530004
  • 收稿日期:2004-10-23 修回日期:2004-12-20 出版日期:2006-05-31 发布日期:2006-05-31
  • 作者简介:李言,教授,博导,研究方向:先进制造与精密加工技术,E-mail:jyxy-ly@xaut.edu.cn
  • 基金资助:
    国家自然科学基金资助项目(50475039)。

Application of Rigid Plastic FEM in the Analysis of Orthogonal Cutting

LI Yan1, ZHU Jiang-xin1,2, XIAO Ji-ming1, LI Shu-juan1, LI Peng-yang1   

  1. 1. Department of Mechanical Engineering & Precision Instrument, Xi'an University of Technology, Xi'an 710048, China;
    2. College of Mechanical Engineering, Guangxi University, Nanning 530004, China
  • Received:2004-10-23 Revised:2004-12-20 Online:2006-05-31 Published:2006-05-31

PDF

53

被引次数

3

摘要： 针对典型的正交切削工艺过程,采用分析静态大变形过程的Lagrange描述法,建立了基于平面应变假设的正交切削过程的刚塑性有限元(RPFEM)分析模型;自行开发了模拟切削变形过程的刚塑性有限元分析程序,详细分析了正交切削变形全过程,计算出了变形体内部的网格变形图和速度场、应力场和应变场的分布结果和成形力随行程(时间)的变化曲线;对切削模拟过程中相关技术问题如切屑与基体材料分离准则、切屑与前刀面脱离判据等进行了系统的探讨;在网格重新划分时,采用面积加权平均和体积加权平均相结合的算法,实现新、旧网格体系之间参数的传递;以刨削为例完成了常温条件下铝试件模拟试验,试验结果证明了数值模拟的正确性.

关键词: 正交切削, 数值模拟, 刚塑性有限元, 切屑成形

Abstract: Lagrange method for the static large deformation analysis is used to establish a rigid-plastic FEM (RPFEM) analysis model based on the orthogonal cutting process of 2D plain strain hypothesis.Based on this model, an RPFEM analysis program is developed to simulate deformation of the cutting process.The whole process of orthogonal cutting is analyzed.The rule of separation between cut chips and the work piece, the criterion of separation between chip and reamer, etc., are discussed.Using the arithmetic of combining the total average weighted value of areas and that of volume, transfer of parameters between the new and old grids are realized when the grids are further divided.Simulation experiments of aluminum work pieces under normal temperature are performed, showing validity of the numeric method.

Key words: numeric simulation, chip formation, orthogonal cutting, rigid-plastic FEM

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