Study on Super-finishing by CBN Stone : Estimation of Cutting performance using Average crossing angle

In super-finishing by cubic boron nitride (CBN) stones, it is considered that chips are formed by crossing of grain locus. Thus, crossing angles of grain loci are paid attention to as a important parameter. In this paper, the new method is proposed using average crossing angle of grain loci. On the other hands, chip formation process is classified two types. Therefore, all crossing angles are calculated considering these types of crossing of grain loci. Average crossing angle is defined as the mean value of those. Moreover, the relation between these average crossing angle and cutting performance is investigated in various calculations and experiments. As results, average crossing angle is one of most important parameters to predict the cutting performance on super-finishing using CBN stones.