Macro Plastic Deformation of Cutting Edge — A Method for Maximum Utilization of Cutting Tool

Summary This paper investigates the macro plastic deformation of the cutting edge and the material near the cutting edge in rough turning. It was found that the macro plastic deformation takes place approximately three seconds after the start of cutting, when the single point cutting tool is not able to cut properly, the surface roughness of the machined surface increases and vibrations appear. A method for maximum utilization of single point cutting tool and tool selection for rough turning, grooving etc. by using the information about the macro plastic deformation of the cutting edge are proposed. Both the way of measuring the macro plastic deformation and how the macro plastic deformation can be detected by means of feed cutting force is presented. Acoustic emission sensors or sensors systems could be used for detecting the macro plastic deformation of the cutting edge.