NUMERICAL CONTROL MACHINE TOOL AND TOOL SETTING ANGLE MEASURING METHOD FOR NUMERICAL CONTROL MACHINE TOOL

摘要

PROBLEM TO BE SOLVED: To provide a numerical control machine tool capable of more accurately setting the angle (tool angle) of a machining blade of a tool. ;SOLUTION: The numerical control machine tool 10 is provided with a work holding part 11 for holding a work 40 having a central hole 40h, a tool 20 to be moved in a Z axial direction and inserted into the central hole 40h, and a tool setting angle storing part 60 for storing the tool setting angle. The tool 20 is provided with a rotational spindle 21 and a machining blade 22 projecting laterally in relation to the rotational spindle 21. The tool 20 is parallelly moved by a driving mechanism 12 to be controlled by a drive control part 13 so as to draw an approximately arched locus in an X-Y flat surface. The angle of the machining blade at a contact point of the machining blade 3 of the tool and the central hole of the work is accurately set on the basis of the tool setting angle, and the moving direction of the machining blade at the contact point is controlled so as to approximately coincide with the inner peripheral tangent of the central hole of the work.;COPYRIGHT: (C)2001,JPO