Yoshiaki Yokoyama

On the Selection of the Cutting Condition of Plain Milling Machines

We analized the process involving self-excited vibration of the plain milling machine and tried to select the stable cutting condition by the simulation with analog computer. As the process involving self-excited vibration, a vibrating system of two directinos of vertical and table feed was considered and a system diagram based on regenerative effect was described. Then, the simulation circuit was composed on the analog computer using an equivalent vibrating system of the plain milling machine which was derived from the frequency response curve. The result coincided with the two kinds of self-excited vibrations at different frequencies caused in cutting experiment and with the stability diagram. As a result, using the analog computer as a simulator, it was made possible to select the best cutting condition never accompanied by self-excited vibrations.