Patent ID: 9463512
Filing Date: 2016-10-11
CPC Classification: B23B,B23Q,G05B,Y10T

Claim Text:
1. A machine tool comprising: a main spindle having a shaft center which fastens an object to be machined such that the shaft center is aligned with a center of the object to be machined, and rotates integrally with the object to be machined; an eccentric guide bush which supports the object to be machined projecting from a leading end of the main spindle in a state of being eccentric relative to the shaft center of the main spindle, wherein the eccentric guide bush is switched between a rotation state rotating about the shaft center of the main spindle and a stop state; a main spindle driver which rotates the main spindle about the shaft center; a guide bush driver which rotates the eccentric guide bush about the shaft center; and a controller configured to control the guide bush driver so as to switch the eccentric guide bush between the rotation state rotating about the shaft center in synchronization with the main spindle and the stop state.