Identification of a new friction model at tool-chip interface in dry orthogonal cutting

Abstract

In order to deeply understand the friction characteristics of tool-chip contact interface, in this paper, a new local friction law was established based on theoretical analysis and experimental verification introducing the distribution of local friction coefficient on the tool rake face to characterize the correlation of local friction coefficient and the local friction parameters. Both global parameters such as cutting forces, contact length, and local distribution of tribological parameters, for instance local friction coefficient, normal stress, and shear stress, were determined analytically by using this friction law. The effect of cutting parameters on the stress distribution, local friction coefficient distribution, cutting forces, and contact length was evaluated. The cutting force and thrust force of several groups of cutting parameters were calculated by adopting the new friction model, and the results were compared with the experimental data. The comparison results indicated that the proposed model has a great prediction and compute capacity.