Patent ID: 8998785
Filing Date: 2015-04-07
Classification: B23B,B23Q,Y10T

Abstract:
1. A machine tool including a tool radius adjusting device, comprising: a tool magazine which stores a plurality of tools including a boring holder having an adjustable tool radius, and in which a tool change index position and a tool radius adjustment index position that are obtained by indexing are set to different positions; a spindle head to which one of the plurality of tools may be fitted at a given time; a tool changer that makes a changeover between a tool stored at the tool change index position and a tool fitted to the spindle head; a tool radius adjusting device that adjusts a tool radius of the boring holder brought out from the tool magazine, and that is able to execute an operation for adjusting the tool radius of the boring holder in parallel with execution of a machining program for executing an operation of the spindle head and an operation of the tool changer; a carrier device that brings out the boring holder located at the tool radius adjustment index position from the tool magazine and carries the boring holder to the tool radius adjusting device, and that returns the boring holder of which the tool radius has been adjusted by the tool radius adjusting device from the tool radius adjusting device to the tool magazine; and a carrier control unit that determines whether a tool changing process is being executed by the tool changer, and that allows the carrier device to execute an operation for bringing out the boring holder from the tool magazine and an operation for returning the boring holder of which the tool radius has been adjusted to the tool magazine when the tool changing process is not being executed.