Interrelation between Shearing Angles of External and Internal Friction during Chip Formation

Abstract

The aim of this work is to develop a methodology for graphically analytical calculation of angles of chip formation process for the case when the initial data are reliable empirical dependencies for the cutting forces’ components and value of shearing angle are obtained experimentally. The research method is based on the application of the elements of cutting theory with respect to flow chip formation scheme and the model of plastic deformation of metal with one slip surface with free cutting without a build-up on the front surface of the blade. Academic novelty is characterized by the developed algorithmic model which is based on the interrelation of shearing angles, external friction-slip chips on the front surface of the blade, internal friction-shear in the plane of shear and the front angle of the blade. The algorithmic model is implemented programmatically in the NI LabVIEW environment and graphically analytical in the KOMPAS-3D program. There were carried out computer experiments and identified the dependencies of chip formation angles on cutting speed and the front angle of the blade. The practical significance consists in the possibility to carry out an engineering analysis of the metal cutting mechanics without carrying out some valuable complex experiments.