Precision loss of ball screw mechanism under sliding-rolling mixed motion behavior
Bao-bao Qi , Qiang Cheng , Shun-lei Li , Zhi-feng Liu , Cong-bin Yang
Journal of Central South University ›› 2021, Vol. 28 ›› Issue (5) : 1357 -1376.
Precision loss of ball screw mechanism under sliding-rolling mixed motion behavior
The sliding-rolling mixed motion behavior degrades the ball screw’s precision at different levels. Based on the sliding-rolling mixed motion between ball and screw/nut raceway, the ball screw’s precision loss considering different given axial loading and rotational speed working conditions was investigated. Since creep and lubrication relate to sliding and rolling motion wear, the creep and lubrication characteristics are analyzed under different working conditions. Besides, the precision loss was calculated considering the sole influence of sliding behavior between ball and screw and compared with the results from other current models. Finally, research on precision loss owing to the sliding-rolling mixed motion behavior was realized under given working conditions, and suitable wear tests were carried out. The analytical results of precision loss are in good agreement with the experimental test conclusions, which is conducive to better predicting the law of precision loss in stable wear period.
ball screw mechanism / precision loss / sliding-rolling mixed motion / creep / lubrication
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