Mechanics of self-rotating double-disc grinding processDražumerič, Radovan (Avtor) Badger, Jeffrey A. (Avtor) Gustavsson, Tomas (Avtor) Krajnik, Peter (Avtor) grindingbearingdouble discUnlike most double-disc grinding processes, which use forced workpiece rotation, some double-disc processes rely on workpiece self-rotation driven by non-uniform shear forces resulting from partial wheel-workpiece coverage. This self-rotation is poorly understood, with workpiece angular frequency remaining unknown despite its importance. This paper investigates the kinematics of self-rotation via analytical modelling of the moment-equilibrium conditions, derived from experimentally determined specific-energy values. The model showed that workpiece coverage ratio is the dominant factor governing workpiece angular frequency, allowing for the choice of optimal workpiece coverage ratios that avoid workpiece-stoppage and excessive frictional heat generation. The predicted velocity was validated with acoustic-emission measurements.20222022-08-09 10:42:04Članek v reviji138675sl