Tool-edge Temperature and Some Influential Factors on Hot-Machining

Abstract

The tool-edge temperature, consists of both temperatures due to plastic deformation on the shearzone and due to tool-chip interface friction, varies by the work condition, heating temperature, energy on the shear zone and tool-chip interface, fraction of the heat to the chip or the work piece and physical properties of the work piece. The author measured cutting force, chip ratio, contact length of the tool-chip interface and also the edge temperature for various work conditions and heating temperatures with 0.26% C carbon steel under orthogonal cutting conditions. More-over compared with both experimental and analytical results. These results may be as follows : - 1. The generated edge temperature would be lesser at elevated temperature than at the room temperature. 2. The edge temperature would have exponential relation with cutting area, cutting speed and depth of cut/feed., and exponent value would decrease according to an increase of the heating temperature.