Studies on Outer-blade Slicing (3rd Report)

Analytical Formulas for Slicing Force

Abstract

The three components of the outer-blade slicing force are discussed analytically, assuming that the shape of the grain cutting edge is approximately a circular cone with the tip angle 2 γ, and investigated experimentally. This paper puts a special emphasis on the effect of the asymmetric wear of the blade onto the component F_z acting in the direction of the wheel axis, which causes an elastic deformation of blade. The results are summarized as follows. (1) The component F_z is in proportion to the following values : specific grinding force; work thickness; tan γ; asymmetric wear coefficient. Furthermore, it is in inverse proportion to the wheel speed. (2) In a practical cutting, component F_z increases gradually from start of the cutting process to its end, which is caused by the change of the apparent asymmetric wear due to the elastic deformation of the blade.