English

Abstract

This paper shows a new grinding force model which was developed by incorporating the effects of tangential, normal and variable coefficient of friction force. This was based on the fact that chip formation during grinding consists of three stages: plowing, cutting and rubbing. Equations for the total normal and tangential force components per unit width of the grinding, during cutting and rubbing (friction) were established. These components were expressed in terms of the experimental coefficients and process parameters like wheel speed, table feed and depth of cut. All the coefficients were determined by considering experimental data of previous work which has been conducted on single layer brazed cBN wheel. The variation of the friction coefficient with process parameters such as wheel speed and work feed were taken into consideration while calculating the frictional force components. The predicted normal and tangential grinding forces were compared with those experimentally obtained data. The results showed reasonably good agreement with experimental data. From the total force values the contributions of each component of force were obtained. It was observed minutely that total calculated forces were bit lesser than the experimented data. This variation was due to the plowing force which was not considered in the force model.