Study of the gyroscopic effect of the spindle on the stability characteristics of the milling system

A new dynamic milling model of a rotating spindle is developed and the gyroscopic effect of the spindle on the stability characteristics of the milling system is investigated for the first time. The results show that although the gyroscopic effect of the rotating spindle does not change the instability regions in milling, it increases the real parts of the eigenvalues of the system or reduces the critical axial depth of cut. In other words, it makes the stability prediction less conservative.