Kinematic Cutting Edge Density

Kinematic cutting edges or grits are only those of the static edges or grits engaging into the workpiece material (Fig. 6.5). The kinematic grit number, Nkin, can be counted at small contact forces so that the tool contact deformation is negligible [ISO89].

Equation 6.9 offers an empirical approach to calculate the number of kinematic grains per unit area, Nkin [WERN71]. Grit density, cgw, arises from grit size, grit

shape and grit concentration. A single grit can have one or more cutting edges depending on grit shape. Yegenoglu found a formula to describe the kinematic cutting edge number in CBN grinding wheels quite accurately (Eq. 6.10) [LINE92, YEGE86].