High speed machining of aisi 1050 steel : Modelling and experimental

Abstract

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An analytical approach is used to model orthogonal cutting process. The material characteristics such as strain rate sensitivity, strain hardening and thermal softening are considered. The chip formation is supposed to occur mainly by shearing within a thin band called primary shear zone. The analysis is limited to stationary flow and the material flow within the primary shear zone is modelled by using a onedimensional approach. Thermomechanical coupling and inertia effects are accounted for. At the tool-chip interface, a temperature dependent friction law is introduced to take account of the extreme conditions of pressure, velocities and temperature encountered during machining. Comparisons between model predictions and experimental results are performed for different cutting conditions.