Machining, Measurement, and Control Laboratory

Measurement of Spindle Stiffness by using a Magnet Loader
Taku Yamazaki, Atsushi Matsubara, Tomoya Fujita, Yusuke Koike, Toshiyuki Muraki, Kohei Asano, Kazuyuki Kawashima

The rotating spindle stiffness measurement with a developed magnetic loading device is proposed in this research. The circumferential grooved tool is designed and manufactured for cutting down the eddy current which decreases the electromagnetic attractive force by the loading device. The spindle stiffness is measured in the condition that the spindle rotates at high speed with applying load to the circumferential grooved tool by the magnetic loading device. As a result, enough electric magnetic force is loaded to the tool and the displacement of spindle rotating at the high speed is measured.
Key Words: spindle stiffness, machine tools, magnet loader, spindle displacement