A review on influence of nano-fluid MQL in machining processes

Abstract

Heat generated during any machining processes is to be effectively dissipated to reduce thermal loads on tool- work piece interface. This inevitable heat generation phenomenon badly affects the surface finish quality, tool wear rate and work piece morphology. Conventional flood type cooling methods are generally used to lower the thermal loads and reduce the heat during machining. However this technique consumes more quantities of coolant liquids which are to be carefully recycled to avoid environmental hazard issues. Recent technique to reduce the quantity of lubrication is Minimum Quantity Lubrication (MQL) in which the coolant is sprayed during machining which reduces the frictional forces and heat produced. Use of fractional quantity of nano- fluid into conventional fluid alongside the nano-fluid MQL is emerging engineering concept in machining processes. It is expected to enhance the heat transfer capabilities. Various machining processes say milling, drilling, turning and grinding, and the impact of nano-fluid MQL on machining parameters likely to be surface morphology, tool wear and temperature are studied in this work. It is also reported that using nano -fluids in an effective way can be amenable to the machining processes due of their superior thermo-physical characteristics.