Suppression of regenerative chatter vibration in simultaneous double-sided milling of flexible plates by speed difference

This paper presents a new method to machine flexible plates with high accuracy and high productivity. Precision steel plates are finished conventionally by face milling with electro-magnetic chucks. It is difficult to correct flatness of the flexible plates, because they deform to fit the chuck surfaces when chucked. To solve this problem, the authors have tried simultaneous double-sided milling, but this causes the regenerative chatter vibration. Thus, the new method is proposed and verified to suppress this chatter vibration, in which the regenerative effects on both sides are cancelled out by rotating the two milling cutters at different speeds.