Evaluation of tool wear using image processing technique in micro-turning

Abstract

It is difficult to evaluate tool wear in micro-turning, because the tools are smaller than conventional one. This study presents a tool wear measuring method in micro-turning using microscope, CCD camera and image processing technique. The accurate 3-D shape of a cutting edge can be recovered from image focus based on Hadamard transform. The high speed and high accuracy capability of the proposed method is demonstrated by experiments.