Measuring apparatus and measuring method thereof, apparatus for correcting processing position of cutting machine and method thereof for correcting processing position, and imaging apparatus and cutting machine comprising the same

Abstract

Provided is an apparatus and a method thereof which can detect a displacement amount of a cutting tool with respect to a workpiece with high accuracy and can correct a processing position with high accuracy. Accordingly, a turret gaugeis comprised of an invar bodyand a gauge main bodywith a different thermal expansion coefficient. A point A of the gauge main bodyand a leading edgeA of the invar body are imaged in a state of viewing the whole thereof at a time of an initialization and a calibration cycle (CS), and a temperature of the gauge main bodyis detected by comparing each image data. Furthermore, the length between the point A and a point B of the gauge main bodyat the time of the CS is obtained based on the image data. The actual length is compared with a theoretical length between the point A and the point B at a temperature of the gauge main bodyat the time of the CS, and consideration is given to the comparison. Therefore, a heat displacement amount of a ball screw can be accurately detected, the displacement of a processing position of a cutting tool can be corrected with high accuracy, and processing accuracy of a workpiece can be improved.