Abstract
Behaviours of the active cutting edges on the grinding wheel during grinding are examined with the newly developed equipment. The light reflected from the surface of the grinding wheel is received by the photomultiplier whose output is amplified, sliced, and modulated in square wave form to give the position and the length of worn area of each cutting edges on the wheel surface. Tearing-out, fracturing, new-exposure, length of life, and growth of worn area of cutting edges are analysed by processing these data obtained with the specially prepared computer program. It has been found experimentally in high speed grinding that the probability of survival of active grains increases with increasing the grinding speed, and with decreasing the grain depth of cut, and that the worn area of the grains varies randomly with the grinding time independently of the grinding conditions.
