Development of interactive friction model for machining considering the instantaneous interfacial characteristics

Abstract

In this article, the transient and complex tribological characteristics of machining interfaces have been considered for developing a friction model. The interfacial characteristics – a condition where process parameters are in fluctuation rather than being constant – are identified. In an investigation of coated carbide tool wear in machining AISI H13 steel, the dominant wear mechanisms were identified as the abrasion, adhesion, and asperity deformation. Considering the complex loading, transient tribological behaviours, and observed wear mechanisms in machining, an interactive friction model is developed based on the mutually interactive nature of wear-and-friction. The evolution of the coefficient of friction with machining time is considered with different stages of tool wear. The adjusting capability of the developed model with respect to the complex loading is explored. The value of this research is to discover a unique behaviour at interfaces, additionally to identify the transient tribological conditions including wear mechanisms, and for the first time, to develop the interactive friction model for machining that adds scientific contribution to the domain of machining tribology.