Identification of nonlinear cutting process model in turning

This paper presents a methodology of force model development. A special experimental stand has been used for cutting force identification to eliminate the regenerative phenomenon and improve the accuracy. The stand was used to carry out the cutting tests with the constant chip thickness. Also tests with sinusoidally varying chip thickness have been performed. During the tests cutting force and relative tool – part vibration has been measured. The measured signals were used to estimate coefficients of the linear and nonlinear cutting force models. An approach similar to the restoring force method widely used in structural dynamics has been implemented for a dynamic force model identification