Friction Process on Relief Face of Cutting Tool

Abstract

Friction process on relief face of cutting tool was discussed comparing with that rake face of cutting tool. Two components of cutting force, shear angle and contact length on rake face with chip were measured when contact length between relief face and machined surface was varied. It was found that compressive stress on relief face was remarkably increased with increase in contact length on relief face, and that shear stress on relief face remained constant independently of contact length on relief face, feed of tool and relief angle. Further it was found that shear stress on relief face was about equal to that on rake face. From these results it is shown that friction process on relief face can be satisfactorily explained as metal-shearing process such as in that on rake face.