接触面積拘束工具のびびり振動抑制効果(第1報) : 発振過程の解析と振動抑制機構の検討

概要

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Cutting models which consist of lines of velocity discontinuity are proposed for analyzing the dynamic, orthogonal cutting with tools of restricted tool-chip contact length under variable undeformed chip thickness. An energy method is also developed which enables us to predict dynamic cutting force and chip formation by using the cutting models proposed and the data of steady cutting with constant undeformed chip thickness. Through the analysis of the dynamic cutting "wave combined" and the simulation analysis of chatter growth in one degree of freedom, the predicted results with the energy method are proved to be in good agreement with those obtained experimentally. It is also revealed through these analyses that the restriction of the contact length yields an appreciable reduction of the variation of cutting force, especially the frictional force, due to chatter vibration. The chatter suppression effect of the tool could be attributed to this reduction. It is further shown analytically and also experimentally that the chatter generation may be protected with the tool of sufficiently small contact length, or at least the chatter growth may be depressed to a certain amplitude.
公益社団法人精密工学会の論文
1990-02-05