Abstract
Machining is one of the largest and significant manufacturing processes. Due to strict environment regulations and water scarcity, reduction in the usage of coolants/cutting fluids has been the need of the hour. The present work focuses upon Analysis of Variance (ANOVA) based investigations using full factorial design on the effect of Minimum Quantity Lubrication (MQL) coolant supply instead of conventional flood coolant method, for surface milling of aerospace Al7075-T6 Aluminum slabs using uncoated carbide tool. Parameters chosen were spindle speed, feed rate and depth of cut with spindle speed in terms of rpm (3000, 4000, 5000, 6000, 7000), feed rate in mm/min (95, 105, 110, 115, 125) and depth of cut in mm (0.5, 1.0, 1.3, 1.6, 2.0). Out of 3 methods of coolant supply, MQL technique yielded superior results compared to dry milling and nanofluid MQL milling, in terms of surface finish (Ra) and minimum temperature values (T) that were observed for nanofluid MQL coolant supply technique. Addition of nanoparticles to the coolant has provided good effect in reducing the temperature at the work tool interface, without affecting the milling performance characteristics.
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