Abstract
In surface grinding, the presence within the workpiece of a high temperature gradient causes a large thermal bending moment, which can cause over-grinding due to the induced convex deformation of the workpiece by the bending moment. The average grinding forces and acoustic emission (AE) are used to predict the over-grinding, based on the facts that the up-grinding force is larger than the down-grinding force, and the AE is larger in up-grinding. Hence, over-grinding can be detected between passes from the mean values of the grinding forces and AE during grinding. Because of the positional separation between the bottom of the workpiece and the dynamometer, the signal transmission from the contact zone to the transducer is reduced, and so the AE does not satisfactorily indicate the amount of over-grinding. The strategy for monitoring the over-grinding by measuring the grinding force is satisfactorily verified in this study.
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