Mechanical Characteristics of Center Bevelled Double Structure Blade

Abstract

This paper reports on deformation characteristics and mechanical features of a tapered bottom tip of a cutting blade subjected to pushing loads. Whereas a 16° high carbon steel bevel blade of 0.16 mm tip thickness was experimentally investigated, various tapered bottom tips were numerically analyzed for effect of tip thickness and apex angle using elasto-plastic Finite Element Method. From this research, the transition point at which a large increase of crushed height also known as the shimming effect starts has been revealed. Major findings of this research have been (i) tip thickness moves the transition point without changing cutting direction stiffness, and (ii) up to a certain range the apex angle controls the lateral deflection mode of the blade.