A new model for initial chip curl in continuous cutting

Abstract It is suggested that the curl of a chip in orthogonal machining appears to be inherent in the primary shear process and that transient tight curl occurs before the secondary shear region develops. However, continuum models that predict curly chips incorporate the stresses due to the secondary shear zone. A new model is presented in terms of the heterogeneous aspects of continuous chip formation, which shows good agreement with experimental data.