Patent ID: 9694460
Date: 2017-07-04
CPC Classifications: B23H,B23Q,G01B

Claim:
1. A tool measurement method for measuring a dimension of a tool having a flat part and an edge part at an end part of the flat part, using a contact type measurement probe, comprising: a measurement step of making a contactor of the measurement probe abut against a plurality of measurement points on the flat part to acquire measurement values; a plane equation derivation step of determining a plane equation of a measurement plane including the flat part, based on the measurement values obtained at the measurement step; a probe movement step of making the measurement probe move along the measurement plane represented by the plane equation determined at the plane equation derivation step from an outer side of the edge part toward the edge part until the contactor of the measurement probe abuts against the edge part; and an edge part position derivation step of determining a position of the edge part, based on a position of the measurement probe when making the contactor of the measurement probe abut against the edge part at the probe movement step.