Assessment of machining performance parameters of nanofluid-based MQL-turning: An experimental analysis and CFD modelling

Abstract

Nano-cutting fluids as a coolant are often used in modern days manufacturing industry. These nano-cutting fluids have certain advantages over conventional coolants in terms of heat transferability and lubricity. The present focused study investigates the machining performance in Minimum quantity lubrications (MQL) turning operation using MoO₃/water nano-cutting fluid. The machining performance parameters (like friction coefficient, cutting forces, surface roughness and wear) are investigated experimentally using MoO₃/water nano-cutting fluid. Also, a computational fluid dynamics (CFD) model was developed to investigate the heat dissipation and temperature profile at rake and flank surface of the carbide cutting tool. The experimental outcomes of the present study illustrate the enhancement in machining performance in terms of reduction in friction coefficient, cutting forces, surface roughness and wear. Heat transfer analysis and a numerical model based on the notion of a CFD tool were used to explore the temperature propagation along with the flank and rake surface of tungsten carbide cutting inserts in order to properly measure tool tip temperature while turning. The simulation study demonstrated the reduction in tool tip temperature at rake face from 1031 K to 824.98 K for the cutting fluid velocity of 25 m/s, while for 2 bar cutting fluid pressure the temperature at rake face reduces to 874.37 K.