Optimization of Drilling Parameters to Minimize Burr by Providing Back-up Support on Aluminium Alloy

Drilling a hole usually leaves behind a undesirable burr at the exit work surface. Application of the method suggested by Taguchi is made in this work to minimize drilling burr of an aluminium alloy using HSS drill within the domain of experiments considered. Parameters used are cutting velocity, feed and machining environment. The effect of process variables on burr height is explored, and the optimum condition for minimizing burr height using a back-up support is determined by the analysis. Experimental runs were chosen followingL27 orthogonal array of Taguchi. Analysis of variance was undertaken to find out the influence of process parameters on the response noted. Predicted values are finally checked for accuracy through a confirmation test. It is found out that back-up support yields much better result than that of normal drilling process. Moderate cutting velocity, low feed and wet condition with water cooling were observed to minimize burr height using a back-up support. Machining environment is found to be the most significant parameter for reducing burr height.