Abstract
This paper describes a simple experimental apparatus which can monitor the positions of abrasive grains and the degree of their wear under wet conditions and practical wheel peripheral speed (30 m/s). The apparatus mainly consists of a laser unit, lens, silicone-PIN-photodiode, etc. The output signal of the apparatus is investigated experimentally. The main content of the experiments are investigations for the effect of air and coolant on the output signal, variations of the output signal under different dressing conditions, a comparison of the print of wheel face and output signal, and that of normal grinding force and the area of the peak of output signal. The main results obtained from the experiments are as follows: (1) The position of peak of output signal is in good agreement with that of the wear flat of cutting edges. (2) The area of the peak corresponds to the degree of the wear flat of cutting edges.
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