On the Dynamic Behavior of Machine Tool Slideway : 3rd Report, Pitching and Yawing Motion of Moving Element Caused by Stick Slip

抄録

On an actual machine tool slideway, pitching and yawing motion of sliding element caused by stick slip is investigated experimentally under various sliding conditions, and the fundamental characteristics of the pitching and yawing motion are clarified. Based on these experimental results, the mechanism of the pitching and yawing motion is studied concretely. It is shown that the amount of the pitching and yawing motion (ε_i') depends on the magnitude of the moment caused by the driving force and the frictional resistance on the sliding surfaces, and that the variation of the pitching and yawing motion (Δε_i) which has important influence on machining accuracy comes from the periodic change of the driving force caused by stick slip, and further that the amounts of ε_i' and Δε_i are generally affected by the characteristics of the driving mechanism, the driving speed, the properties of the lubricant and the feature of the sliding surfaces.