Abstract
Performance of a grinding operation depends mainly on material removal ability of the grinding wheel used, which is closely related to its cutting sharpness. In the case of CBN wheels, the cutting sharpness can be traced to the interaction between CBN and diamond grits during truing process. This paper presents a mathematical model for predicting the number of collisions that a CBN grit is subjected to in truing process when various designs of truing disc are used. The model takes into account geometric and kinematic characteristics of wheel-truer engagement, and interaction between colliding grits. Various characteristics of truer, wheel and truing process are also included. Grit retention parameter z, which was introduced in this research, accounts for the capability of retaining grits in truer and wheel. Modelling results are compared to results from truing and grinding tests.
