E22 直動転がり案内における非線形摩擦特性(OS2 最新機械要素技術(1))

概要

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The linear roller guide used in this study has a very narrow gap between the carriage and the top surface of the guide rail, as compared to conventional types, in order to investigate the friction characteristics of the thin film of lubricants and the influence of friction on the dynamic behavior of the feed drive system. In the measurement of friction force, several kinds of greases with different viscosities are filled into the narrow gap. It is found that the viscous friction measured in the linear roller guides is largely affected by the grease filled in the gap. This paper proposes a mathematical model for a feed drive system by taking into account the friction characteristics of the linear roller guide. To confirm the validity of the proposed model, step responses under various conditions were measured and simulated. As the results, it was confirmed that the proposed model can express the actual behaviors.
2010-11-19