INCREASING THE SURFACE FINISH QUALITY AND MRR BY VARYING MILLING PARAMETERS FOR ALUMINUM ALLOY 7475

Abstract

The main objective of this project is to optimize the process parameters in milling to achieve better surface finish and higher material removal rates using different cutting tools.

Different experiments are conducted to optimize the process parameters to improve the surface finish quality and material removal rate Solid Carbide cutting tool and Ceramic Insert while machining Aluminum alloy AA 7475. A series of experiments are done by varying the milling parameters spindle speed, feed rate, depth of cut and tool material considering L27 orthogonal array by Regression Analysis and Genetic Algorithm. The optimization is done for least surface roughness and high material removal rates.

The experiment has been done with process parameters feed rate 80mm/min, 120mm/min, 160 mm/min, spindle speeds are 1000rpm, 1200rpm, 1400rpm, and depth of cut 0.5mm, 1mm and 1.5mm and tool material High Speed Steel, Tungsten Carbide and Ceramic Coated Carbide.