Experimental Analysis of Mrr and Surface Finish Using Abrasive Water Jet Machining Of Aluminum Alloy 7475

Abstract

In this thesis, different experiments are performed on Aluminum alloy 7475 by varying various parameters such as Pressure, Sand Feed, Transverse Speed and Standoff Distance (i.e) Nozzle to work piece distance to determine Material Removal rates and surface finish. Optimization is done using L27 orthogonal array by Taguchi technique to determine better parameters to obtain maximum removal rates and minimum surface roughness. Grey relational analysis will be applied to generate grey relational grade to identify the optimum process parameters. These optimum parameters can be adjusted to improve performances of AWJM.

The parameters considered are Transverse Speed 70mm/min, 80 mm/min, 90 mm/min, Standoff Distance 0.5mm 1mm, 1.5mm, and Sand Feed 50 g/min, 100 g/min, 150 g/min, Pressure 160MPa, 240 MPa, 320 MPa.