精密主轴回转误差和刚度测试技术研究  

Study on Measurement of Error Motion and Stiffness for Precision Spindles

作　　者：冯明[1] 杜德渝 王新杰 周程瑜 FENG Ming;DU Deyu;WANG Xinjie;ZHOU Chengyu(School of Mechanical Engineering,University of Science and Technology Beijing,Beijing 100083)

机构地区：[1]北京科技大学机械工程学院,北京100083

出　　处：《机械工程学报》2021年第13期18-25,共8页Journal of Mechanical Engineering

基　　金：工业强基工程资助项目(TC160A310)。

摘　　要：采用三点法误差分离技术计算主轴回转误差时,为提高误差分离的精度,需要尽量降低信号中系统噪声的影响。通过比较不同滤波方法的效果,提出了集合平均和小波阈值去噪组合方法,提高了同步误差的分离精度;通过单独测量系统噪声标准差,并利用异步误差和噪声分别服从正态分布的特点,提出了提高异步误差分离精度的方法。对于精密主轴刚度测试,根据其轻载高速的特点,提出了采用部分瓦气体静压轴承技术给被测主轴加载的方法,并开发了具有5自由度自适应调节功能的非接触加载器,验证了该方法的有效性。To improve the measuring accuracy of error motion,it’s necessary to filter to eliminate the noise in the displacement signals when using the three-point error separation technique.After comparing the effects in different filtering methods with simulation and experiment,the paper proposes the ensemble average and wavelet combing denoising method which can significantly improves the separation accuracy of synchronous error motion(SEM).By measuring the system noise separately and considering that asynchronous error motion(ASEM)and noise are independent with each other and obey the normal distribution,a method to improve the separation accuracy of ASEM is proposed.As for the stiffness test under high speed condition,a novel method using partial air bearing to load spindle shaft is proposed.A non-contact loader with five degrees of freedom adjustment function is successfully developed and its effectiveness is verified by experiment.

关 键 词：回转误差 误差分离 小波去噪 刚度 非接触加载 

分 类 号：TH161[机械工程—机械制造及自动化]