Research on temperature distribution mathematical model of cutting tool during heavy cutting difficult-to-machine materials

Abstract

Heavy cutting is the main machining way for high-end equipment and the high temperature generated from the cutting process largely influences on the machining and tool life. Firstly, the main cutting area where energy was converted into cutting heat and the approximate rectangular distribution of cutting temperature were received through finite element simulation of heavy cutting difficult-to-machine materials and the finite element simulation provided fundamental basis for temperature distribution mathematical model. Then, heavy cutting characteristics and Jaeger moving heat source theory were combined to calculate the average temperature of shearing surface and rake face of the cutting tool. Finally, temperature distribution mathematical model in tool-chip contact area for heavy cutting difficult-to-machine materials was established using Kelren theory. The results show that the established mathematical model are consistent with experiment results and the model provides theoretical basis for quantitative analysis of heavy cutting temperature, the optimisation of cutting parameters and heavy cutting tool design.