上海交通大学学报

上海交通大学学报（自然版） ›› 2011, Vol. 45 ›› Issue (11): 1592-1596.

• 机械工程 • 上一篇    下一篇

分段修正系数建模数控机床热误差

赵海涛1，冯伟1，杨建国2   

  1. (1.盐城工学院 机械工程学院，江苏 盐城 224051； 2.上海交通大学 机械与动力工程学院，上海 200030）
  • 收稿日期:2011-01-12 出版日期:2011-11-30 发布日期:2011-11-30
  • 基金资助:

    高等学校全国优秀博士学位论文作者专项资金资助项目(200131)

Stepwise CoefficientsModifying Modeling of  Thermal Errors of a CNC Machine Tool

  1. (1. School of Mechanical Engineering, Yancheng Institute of Technology, Yancheng 224051, Jiangsu China; 2. School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200030, China)
  • Received:2011-01-12 Online:2011-11-30 Published:2011-11-30

摘要： 首先分析了建立在最小二乘法基础上的线性回归分析建模原理的不足及其局限性，在此基础上提出了分段修正系数建模机床热误差方法，并对其原理及建模补偿策略进行了详细推导.通过对数控车削加工中心主轴径向热误差进行建模补偿试验，可以看到，在建模时使用的原始采样点处，拟合误差几乎为零，代入非原始采样点数据时，由模型算得的热误差补偿值和原始采样数据具有很好的拟合性，表明这种建模方法可有效提高热误差补偿精度.
 

关键词: 热误差, 数控车削中心, 分段修正系数建模法, 零误差

Abstract: Based on the analysis of insufficiencies and limitations of the linear regression analysis modeling method, a new modeling method, that is, stepwise coefficients-modifying modeling method (SCMM) whose basic theory and compensation strategies are evolved and elaborated on, was proposed. The modeling and compensation tests were carried out on a CNC turning center. The results show that the fitted errors are nearly close to zero at the sampled data based on that the model was derived (called original sampled data here) while a good conformity with the original sampled data is got at the nonoriginal sampled data, which proves the thermal error model can effectively improve the compensation accuracy.

Key words: thermal error, CNC turning center, stepwise coefficientsmodifying modeling method, zero error

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