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Simulation of Run-out caused by Imperfection of Ball Bearing for High-speed Spindle Units  

Zverev Igor Aexeevich (Department of Machine Tools, Moscow State University of Technology(STANKIN))
Eun In-Ung (Department of Die and Mold Design, Kyonggi Institute of Technology, Siheung)
Chung Won-Jee (Department of Mechanical Design and Manufacturing, Changwon National University)
Lee Choon-Man (Department of Mechanical Design and Manufacturing, Changwon National University)
Publication Information
International Journal of Precision Engineering and Manufacturing / v.7, no.3, 2006 , pp. 3-7 More about this Journal
Abstract
For the purpose to improve and to automate designing of high-speed spindle units (SU's), we have developed the mathematical models and software to estimate SU performance characteristics, including the run-out of spindles running on ball bearings. In order to understand better the mechanics of high-speed SUs, the dynamic interaction of ball bearings and SU, and the influence of the bearing imperfections and SU's operational conditions on the run-out, we have carried out computer simulation and experimental studies. Through the study of SU's, we have found out that run-out of SU can vary drastically with variation of rpm. The influences of rotation speed and of accuracy parameters of bearings on the SU accuracy have the greatest importance. The influence of bearing preload has a secondary importance. Comparison of the results of these studies has demonstrated adequacy of the models and software developed to the real SU's.
Keywords
High-speed spindle unit; Rotational accuracy; Run-out; Ball bearing; Dynamic and spectrum models; Imperfections of bearings;
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