METHOD FOR DETECTING DISPLACEMENT OF CUTTING EDGE POSITION, MACHINE TOOL PROVIDED WITH CUTTING EDGE POSITION DISPLACEMENT DETECTING FUNCTION, AND TOOL HOLDER FOR MACHINE TOOL

摘要

PROBLEM TO BE SOLVED: To correctly detect the displacement of the cutting edge position of a tool in high-speed rotation. ;SOLUTION: A first displacement gauge 29 provided on a main spindle housing 7 and for measuring the distance to a reference block 4, and a second displacement gauge 30 provided on the main spindle housing 7 and for measuring the distance to the main spindle end surface 82 or a tool holder 9 are provided, and a controller calculates the displacement of a main spindle housing tip 71 and the displacement of a main spindle 8 in relation to the main spindle housing tip 71 on the basis of the measured values of the first displacement gauge 29 and the second displacement gauge 30. The axial position of the rear end of a tool and the axial direction in the constraining center in which the tool holder 9 constrains the tool are measured by the second displacement gauge 30, the displacement of the cutting edge position of a tool T in relation to the tool holder 9 is calculated on the basis of the axial position of the tool rear end and the axial position of the constraining center measured by the second displacement gauge 30, and the cutting edge position of the tool T is corrected on the basis of the calculated result.;COPYRIGHT: (C)1998,JPO