This paper studies chatter stability of composite cutter bar milling
system in rotating coordinate frame. Based on the structural dynamic
equation and regenerative milling force model of composite cutter bar in
rotating coordinate frame, the continuous distributed chatter analysis
model of composite cutter bar milling system is established. The
stability of milling system with a rotary symmetric dynamic cutter bar
is predicted by using the semi-discrete time domain method. Influences
including internal damping, external damping, symmetrical and asymmetric
laminates on the stability of milling system are analyzed, and the
results obtained in rotating and fixed coordinate frame are compared. It
is shown that the results are consistent for symmetrical cutter bar
either in the rotating coordinate frame or in the fixed coordinate
frame. A new chatter instability zone appears at high rotating speeds
due to material internal damping of the rotating composite cutter bar.