Measurement of Rigidity Change of Preload Switching Spindle
Taku Yamazaki*, Atsushi Matsubara**,
and Shinya Ikenaga**
*Development and Design Department, Yamazaki Mazak Corporation, Oguchi-cho, Aichi 480-0197, Japan
**Department of Micro Engineering, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto 606-0024, Japan
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.
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