Abstract
A three-dimensional chip formation mechanism in oblique cutting is analyzed by applying the rigid-plastic FEM (Finite Element Method). By developing a three-dimensional model of the work material, the plastic deformation field in oblique cutting is continuously analyzed for the transition process from the beginning of the cutting until the steady state. Three-dimensional transition process of the chip formation for a carbon steel (S 45 C) are simulated. In the simulation, the chip flows considerably inclining along the tool rake face due to the inclination angle. The transition behavior of three components of cutting force and variations in the cutting forces in association with tool inclination angle are also simulated. The simulation results are compared with in-situ scanning electron microscope observation of cutting experiments in terms of chip geometry and cutting forces, and good correlations between them are found.
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