A Method for drilling performance improvement of Magnesium alloy
Magnesium alloy is one of the lightest materials which has wide applications in the production of aircraft engines, airframes, helicopter components, light trucks, automotive parts and computers parts for its attractive properties. In this paper focuses on the optimization of drilling parameters using the Taguchi technique to obtain minimum hole surface roughness (Ra) and chip tool interface temperature, and to obtain maximum material removal rate. A number of drilling experiments were conducted using the L9 orthogonal array on conventional drilling machine. The experiments were performed on Magnesium AZ91D alloy using HSS twist drills under dry cutting conditions. The measured results were collected and analyzed with the help of the commercial software package MINITAB16. Analysis of variance (ANOVA) was employed to determine the most significant control factors affecting the hole surface roughness, material removal rate and chip tool interface temperature. The spindle speed, feed rate and hole diameter were selected as control factors. The main and interaction effect of the input variables on the predicted responses are optimized. The optimal values and measured values are fairly close.