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Experimental Investigations on Tool Wear during Abrasive Assisted Drilling of Aluminum Matrix Composite Using ANOVA

The effect of material removal rate of Aluminum Matrix Composite has been evaluated experimentally as well as analytically in terms of tool wear to investigate the performance of high-speed steel twist drills. Three different concentrations of 1200 microns fine mesh size of Silicon Carbide and Aluminum oxide abrasives are used in abrasive slurry system. Through several performance characteristics for material removal rate and tool wear, the drilling parameters such as spindle speed, feed rate, slurry concentration and mesh size are calibrated. Experiments are planned by application of Taguchi method and conducted on CNC vertical machining center. The software package MINITAB 16 is used for analytical result evaluation. The feed rate indicates the maximum effect and the concentration of slurry has a negligible effect on the results predicted by the analysis of variance. At the maximum feed rate, speed and slurry concentration, the signal-to-noise ratio displays the optimum performance. Scanning electron microscopy and Electron detector system show the tool wear rate at different speeds, feeds and slurry concentrations. The critical variables which affecting the tool wear and removal rate of material are the feed rate and work piece material.