平フライス削りに発生する再生びびり振動(第1報) -切削抵抗およびフライス工具の変動特性ー

概要

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The chatter vibration in the plain milling poerations is investigated experimentally. Plain milling operation is characterized by a transient and intermittent cutting process, in which underformed chip thickness varies continuously. The underformed chip thickness variation is just opposite in the up milling and down milling process. In the previous reports, the property of primary chatter vibration was investigated experimentally. The vibration energy supply during the primary chatter vibration was discussed by observing the phase relation between the cutting force fluctuation and the vibration displacement of the cutter. In this report, the property of the regenerative chatter vibration in plain milling operation is investigated on the basis of the cutting force fluctuations. The vibration energy supply during the primary chatter vibration of plain milling operation is closely related to the interference between the tool flank of milling cutter and the workpiece surface accompanying the bend or the tortion of the milling arbor. The exciting mechanism of the regenerative chatter vibration, in addition to this factor, is caused by the so-called regenerative effect, too. Considering these factors, the property of the regenerative chatter vibration in the plain milling operation is examined in detail based on the characteristics of the cutting force during the vibration.
2000-11-10