关键词: 颤振； 极限切深； 再生颤振； 动柔度； 颤振主动体

Abstract:

The processing stability of machine system was studied by combining theoretical analysis and test observations herein. From the viewpoint of the mass allocation and enough supply of energy to keep chatter, a result, which chatter should occur on tool system or workpiece one first, is concluded. Based on the points above, the recent model of regenerative chatter was expanded to one with double elastic bodies. Study results show: when the receptances of two elastic bodies have bigger difference in value, the one with bigger receptance should become the active body of chatter, and chatter frequency should be its natural frequency. This part should be the weak one of the system. When the receptances of two elastic bodies is close, the active body of chatter should be chosen according to the processing condition. Our testing results expose this course and result visually, of that the active body of chatter will be changed from one to another in increasing the cutting depth continuously.

Key words: chatter, limit cutting depth, regenerative chatter, receptance, active body of chatter