Multiple Performance Optimization in Drilling Using Taguchi Method and Utility Concept

Formation of exit burr on part edges during drilling has several undesirable features on product quality and hence requires significant attention in the manufacturing research. Simultaneous minimization of burr height and burr thickness in drilling ofAISI 316L stainless steel v^ork pieces is formulated as a multi-response optimization. The approach of Taguchi design for multi-response optimization problem is based on utility concept, which employs weighting factors to signal to noise ratio of individual responses to obtain multi-response signal to noise ratio. The optimal drilling process parameters such as cutting speed, feed, point angle and lip clearance angle are determined using Analysis of Means. The Analysis of Variance indicates the contributions of various parameters in controlling the burr size. The experimental results confirmed the validity of the proposed methodology for minimization of burr size during drilling.