Damping Capacity of Turning Tools, Part 1: Effect of Clamping Conditions and Optimum Clamping Load

Damping capacity greatly affects the dynamic rigidity of a machine tool system. This paper deals with the damping capacity of turning tools. Damping capacity is measured as a function of clamping conditions such as clamping load or surface topography of tool shank. An empirical equation of damping capacity representing the clamping load dependence is induced for the fundamental mode of vibration in tangential and normal directions. The optimum clamping load, at which the stability of turning tool for chatter excitation becomes maximum, is experimentally clarified.