ボールエンドミル加工の再生びびり振動に関する研究 (第1報) : 振動発生限界の理論的解析

概要

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The"chatter stability in ball end milling is analyzed using a feedback theory. The instantaneous depth of cut is determined by a simple cutting model. The dynamic cutting force due to the penetrating velocity of a cutter is considered in the cutting process. The unstable region is investigated on a surface machined during one cutting. The results obtained are as follows. The chatter vibration occurs easily in the region where the instantaneous depth of cut is small. The chatter stability is high when cross-feed normal to tool-feed direction is downward. Up milling has a high stability compared with down milling. Higher stability is obtained if lower cutting speed is chosen. Depth of cut does not affect the chatter stability except the case of "downward cross-feed and up milling." High stiffness, high natural frequency and high damping ratio of the clamping system of the end mill results in a high stability.
公益社団法人精密工学会の論文
1998-07-05