Abstract
This study aims at a theoretical and experimental investigation on the improvement of dynamic rigidity of the complex tool shank by combining high-damping alloy with high-stiff material such as sintered carbide. There are various kinds of high-damping alloy, and SILENTALLOY of ferromagnetic kind is used in this case. The main conclusions obtained are as follows. (1) The damping characteristics in complex tool shank of sandwich construction depends on the outside materials. (2) The complex tool shank has the highest dynamic rigidity when it is constructed with SILENTALLOY on the inside and sintered carbide on the outside and its cutting stability against chatter vibration increases considerably.
