SPINDLE TILTING DETECTION DEVICE AND MACHINE TOOL PROVIDED WITH THIS

摘要

An object of the present invention is to provide: a spindle inclination detector capable of surely detecting spindle inclination with a simple configuration; and a machine tool including the spindle inclination detector. Spindle inclination detectors(41A,41B) are equipped in columns(32A,32B) of a portal bridge (24) of a machine tool (21) . Each spindle inclination detector includes: a string(43) which hangs vertically with an upper end fixed to the column (reinforcement (32b)) and a lower end attached to a weight (45) ; a gap sensor(44) which is attached to the string to measure a distance to a front face plate(32a) of the column; and an oil damper(46). Moreover, a spindle inclination correction controller provided to the machine tool controls a Peltier device (42A, 42B) attached to a rear face plate (32d) of the column, on a basis of an average distance measured by the gap sensor, and thus corrects an inclination of a spindle(28) due to the thermal deformation of the column by correcting thermal deformation of the column.