Development of a Contactless Biaxial Magnetic Loader for Evaluation of Spindle Dynamics

Abstract

A contactless excitation method with a magnetic loading device is investigated for the measurement of dynamic compliance of the tool-holder-spindle system, aiming the real-time simulation of the regenerative chatter with mode coupling. The loading device that can excite in two radial directions of the spindle was developed. This paper reports the basic characteristics of the loading device, which are the static relation between the coil current and the attractive force, the influence of the attracted size of the dummy tool, and dynamic response obtained with swept-sine excitation.