Experimental Study and Modeling of Steady State Temperature Distributions in Coated Cemented Carbide Tools in Turning

Plastic deformation of the tool is one of the most important wear modes in metal cutting, especially in continuous cutting operations. Since the strength of the tool material depends strongly on the temperature, a correct temperature distribution in the cutting edge is of key importance for the prediction of plastic deformation of the cutting edge.The temperature distribution in coated cemented carbide cutting tools is investigated using experimental techniques (IR-CCD) and finite element analysis. CVD-coated cemented carbide inserts are tested in continuous turning of quenched and tempered steel (AISI 4340). Cutting forces and edge temperature distributions are measured in 2D orthogonal turning. Finite element simulations of orthogonal turning of AISI 4340 steel with CVD coated cemented carbide inserts are performed. The simulation results are used to predict steady state temperature distribution in tool by performing further coupled thermo-mechanical finite element simulations. Different methods of heat source on tool rake face are used.It is observed that steady state temperature distribution from simulation matcheswell with experimental result.