Experimental Investigation and Optimization of Surface Roughness in Drilling Operation of Aluminium Alloy by Taguchi and ANOVA

Mechanical Engineering

Drilling operation play an important role in the manufacturing industry. Drilling operation performed by conventional method or unconventional method both methods have it own value as per requirements. Drilling operation widely used in the aerospace, aircraft and automotive industries and modern metal cutting methods are improved. In this Experimental study, focused on the optimization of drilling parameters using the Taguchi method to obtain minimum surface roughness (Ra) and hole diameter. A number of drilling experiments were conducted using the L9 orthogonal array on conventional drilling machine. The experiments were performed on AI 7075 alloy block using High Speed steel (HSS) twist drills under dry cutting conditions. The Experimental results were recorded and analyzed with the help of MINITAB17. Analysis of variance (ANOVA) was employed to determine the most significant control factors affecting the surface roughness and hole diameter. The spindle speed, feed rate and Lubrication were selected as control factors. The main and interaction effect of the input variables on the predicted responses are investigated. The predicted values and measured values are fairly close.

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