A single diamond wheel was machined and prepared by the techniques of grinding, precise grinding, soldering and brazing with natural diamond stuff of high performance, in order to investigate the removal mechanism of hard-brittle materials, as well as the principle of the abrasive particle abrasion and surface damage. Digital images of diamond fore-end were acquired by Quanta 200 scanning electronic microscope, before the grayscale converting, histogram equalization, median filtering, binarization and Canny edge detection of the original images. Afterwards, the pixel number of image ruler in horizontal direction was counted by applying the Photoshop software. And then different circles were made to be tangent internally with the fore-end profile of abrasive particle. Furthermore, the radius of the maximum inscribed circle was defined as the ROC of single diamond wheel, according to a rudimental algebraic theory. The subsequent experiments were validated the accuracy and operability of the new method, which is kindly advised to those special situations being shortage of precise measuring instruments.
