Machining, Measurement, and Control Laboratory

Measurement of Rigidity Change of Preload Switching Spindle
Taku Yamazaki, Atsushi Matsubara, and Shinya Ikenaga

High performance milling spindles with high rigidity and high speed are required for high productive machining. A preload switching spindle has been designed to obtain high rigidity at low speeds while avoiding bearing burn at high speeds. In this report, the load-displacement relationship of a preload switching spindle is measured with a non-contact magnetic loading device. Measurement and simulation results are compared to clarify the rigidity change by preload switching.
Keywords: parallel kinematic mechanism, elastic deformation, gravity, rotational resistance, calibration.