Dynamic stabilization of the turn-milling process by parameter optimization

The process of turn-milling was a subject of intensive research in the late 1980s, which was followed by a number of practical applications. However, this process has not been investigated as extensively as other conventional cutting processes (turning). The main limitations preventing wider use hav e been the kinematics (smaller shape elements) and the dynamic instability. This paper presents guidelines showing how to avoid dynamic instability by using optimum entry-exit conditions which can be achieved through a proper set-up of the process parameters. As a result, a decision diagram is propo sed. The paper also presents the results of comparison with turning, showing tha t, at the same productivity, turn-milling enables better surface roughness and is much more suitable for highspeed cutting (HSC) machining than turnin g, where the centrifugal force restrains the process.