东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2014, Vol. 35 ›› Issue (8): 1179-1183.DOI: 10.12068/j.issn.1005-3026.2014.08.026

• 机械工程 • 上一篇    下一篇

基于数值积分的车削加工时域仿真

刘宇，李青祥，张义民   

  1. (东北大学 机械工程与自动化学院， 辽宁 沈阳110819)
  • 收稿日期:2013-09-24 修回日期:2013-09-24 出版日期:2014-08-15 发布日期:2014-04-11
  • 通讯作者: 刘宇
  • 作者简介:刘宇(1980-)，男，宁夏中卫人，东北大学副教授；张义民(1958-)，男，东北大学教授，博士生导师，教育部“长江学者奖励计划”特聘教授.
  • 基金资助:
    国家自然科学基金资助项目(51105067，51135003)；中央高校基本科研业务费专项资金资助项目(N120403011)；“高档数控机床与基础制造装备”科技重大专项(2013ZX04011011).

Turning TimeDomain Simulation Based on Numerical Integration

LIU Yu， LI Qingxiang， ZHANG Yimin   

  1. School of Mechanical Engineering & Automation， Northeastern University， Shenyang 110819， China.
  • Received:2013-09-24 Revised:2013-09-24 Online:2014-08-15 Published:2014-04-11
  • Contact: LIU Yu
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摘要： 建立了车削加工系统z向单自由度动力学模型，试验测试获得了CJ0625车床的刀架频响函数，并辨识获得结构动态特性参数.采用一种变步长方法进行时域仿真研究，该算法可以根据计算点主轴转速动态调整仿真步长，保证算法收敛，满足仿真结果精度要求.基于Matlab平台设计并编写了车削加工时域仿真软件.对时域仿真方法与频域颤振预测方法(叶瓣图法)进行了比较研究.给出了稳定切削、临界稳定以及颤振情况下的振动位移变化曲线.结果表明两种方法获得的车削加工绝对稳定切削深度误差小于607%.

关键词: 数值积分, 车削加工, 时域仿真, 频域预测, GUI软件

Abstract: A single degree of freedom dynamic model in z direction for turning machine system was established. The frequency response function of the tool holder of CJ0625 turning machine was obtained through the hammer test， with the dynamic parameters identified. The timedomain simulation was conducted using a variable stepsize method that can dynamically adjust the stepsize according to the spindle speed and thus ensure the algorithm convergence and required accuracy. The software for the timedomain simulation of the turning process was designed and written based on the Matlab platform. The timedomain solution method was compared with the frequency domain flutter prediction method (stability lobe diagram)， and the displacement vs time history curves of vibration were given under the conditions of stable cutting， critical stable cutting and unstable cutting. The results show that the errors of absolute stable cutting widths determined using these two methods are both below 607%.

Key words: numerical integration, turning process, timedomain simulation, frequency domain prediction, GUI software

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