• CN:11-2187/TH
  • ISSN:0577-6686

›› 2010, Vol. 46 ›› Issue (7): 181-186.

• 论文 • 上一篇    下一篇

圆角铣削颤振稳定域建模与仿真研究

李忠群;刘强   

  1. 湖南工业大学机械工程学院;北京航空航天大学高效数控加工技术研究应用中心
  • 发布日期:2010-04-05

Modeling and Simulation of Chatter Stability for Circular Milling

LI Zhongqun;LIU Qiang   

  1. School of Mechanical Engineering, Hunan University of Technology R&A Center of Advanced CNC Machining Technology, Beihang University
  • Published:2010-04-05

摘要: 为避免在圆角铣削加工中产生颤振,建立考虑再生作用的圆角铣削动力学模型,推导其平均方向力系数计算公式。鉴于圆角铣削时主轴转速通常远大于圆角处的进给角速度,两者的平均方向力系数近似相等。因此,经典直线铣削颤振稳定域解析模型适用于圆角铣削,前提是需要用最大径向啮合角代替名义径向啮合角进行仿真。根据铣刀与工件的啮合情况,将圆角铣削分为均匀切宽圆角铣削和非均匀圆角切宽铣削两类,并分别推导出其最大径向啮合角计算公式。在动力学建模基础上开发圆角铣削颤振稳定域仿真模块,仿真结果得到了切削试验的验证,为圆角铣削切削参数的选择提供了一条有效途径。

关键词: 参数优化, 颤振稳定域, 动力学仿真, 圆角铣削

Abstract: To avoid chatter in circular milling, the dynamics of circular milling is modeled to include the regenerative effect, and the corresponding average directional force coefficients are derived. When the fact that the rotation speed of the spindle is much larger than the angular speed of the feedrate, the same average directional force coefficients are obtained for the circular milling with that of the linear milling by approximation. Therefore, the analytical chatter model for the linear milling can be applied to the circular milling; the precondition is that the maximal radial engagement angle instead of the nominal radial engagement angle should be used. The expressions of the maximal radial engagement angle for circular milling with both uniform and non-uniform radial depth of cut are derived by the geometrical relationship between the cutter and the workpiece. The dynamic simulation module is developed for circular milling based on dynamic modeling, and the simulation results are verified by cutting experimental tests. As a result, an effective approach can be provided for the determination of cutting conditions of circular milling.

Key words: Chatter stability lobes, Circular milling, Cutting conditions optimization, Dynamic simulation

中图分类号: