Fast error identification method for rotary axis based on parametric modeling

被引：0
|
作者：
Xu K. [1 ]
Li G. [1 ]
Li Z. [1 ]
Xia C. [1 ]
He K. [2 ]
机构：
[1] State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing
[2] Chongqing Key Laboratory of Manufacturing Equipment Mechanism Design and Control, Chongqing Technology and Business University, Chongqing
来源：
Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument | 2020年 / 41卷 / 08期
关键词：
Double ball bar; Fourier series; Parametric modeling; Position dependent geometric error;
D O I：
10.19650/j.cnki.cjsi.J2006557
中图分类号：
学科分类号：
摘要：
Aiming at the problems of large calculation and unavoidable abnormal values in existing geometric error identification methods of rotary axis, a fast identification method of rotary axis position dependent geometric errors based on parametric modeling is proposed in this paper. Firstly, the characteristics of the position dependent geometric errors of rotary axis is analyzed, the comprehensive model of the length change of the double ball bar is established in the rotary axis measurement process and the model is simplified based on the constraint conditions. Secondly, the fourth order Fourier series is used to conduct parametric modeling of the 5 position dependent geometric errors and the position dependent error identification model is obtained based on the 5 measurement patterns. Then, the effect rule of the installation error of the double ball bar on the bar length change and identification results is analyzed, and the effect is removed. Finally, the experiments were carried out on the rotary working table of a small-size five axis machine tool; 5 position dependent geometric errors of the rotary axes were identified and the correctness of the identification method was verified through the extra prediction experiments of the bar length of the double ball bar by changing the installation position and angle of the double ball bar. © 2020, Science Press. All right reserved.
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页码：21 / 29
页数：8
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