びびり振動抑制のための工作機械剛性の自動化

抄録

In cutting process, chatter vibration is a problem that deteriorates machining accuracy. Self-excited vibration is one of the most common types of chatter vibration, and it must be suppressed because it can suddenly become large vibrations. In a previous study, a method was proposed that changing the rigidity of the machine tools for suppressing chatter vibration without changing the machining conditions. However, the method for changing machine tool stiffness was by manual setting. In this study, the stiffness changes of a brace bar attached to a desktop machine tool is performed automatically by using a servo motor. We developed a new device to change the stiffness controls and attached to the machine tool. The effectiveness of the automatic stiffness control is evaluated through hammering and machining tests.