Abstract
Chip forms are affected by three factors being flow angle, side- and up-curl of the chip. A model of two-dimensional cutting, in which boundary of the chip and workpiece is constructed by two circular arcs, is proposed. Furthermore a model of oblique cutting is developed for predicting the chip formation and cutting forces. In the model it is assumed that the deformation in the plane normal to the cutting edge takes place as the same in the model of two-dimensional cutting, and translational velocity is considered for explaining the direction of chip flow. The model permits the existence over a wide range of shear angles. For oblique cutting one situation having a radius of up-curl of the chip is determined as the situation to be realized by minimizing the rate of energy consumption.
