Static and dynamic analysis of high speed small size motorized spindle

Small size and high speed motorized spindle is applied to Micro-machining and micro/meso-scale machine tools (mMTs). Usually, these spindles are compact and precise, rotation speed ranges from 40000 to 20000 rpm. In order to acquaint the performance, we investigated kinds of parameters of small size motorized spindle applied in a prototype meso milling machine which we are developing. The motorized spindle is analyzed in static and dynamic by ANASYS. Static rigidity, vibration characteristic, spindle deformation and natural frequency are calculated. These parameters are helpful in machine tool body design and performance improvement. We show a process how to simulate and calculate characteristic of the spindle by ANASYS and the meso milling machine is redesigned in terms of these data. Experiment results show that the small size spindle fulfills all the needs in application and the machine tool performance improve after redesign.