Author : Chithajalu Kiran Sagar and Bhaskar Pal

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.

Keywords: Grinding force model, Brazed single layer cBN wheel.

Article published in International Conference on Advances in Mechanical Sciences 2014, Special Issue-2 (Feb 2014)