Measurement of tool-work interface temperature in hot machining

Abstract

A new technique for the measurement of tool-work interface temperature In conventional and d.c. hot machining is described. Experimental results of tool-work interface temperature obtained under different machining conditions of cutting speeds, feeds and heating currents and using four different grades of tungsten carbide cutting tools, are presented. Results indicate that the interface temperature was higher when machining with cutting tool grades which had a lower thermal conductivity. Also, d.c. hot machining with negative tool polarity produced lower interface temperature than when positive tool polarity was employed.