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The internal quality of the hole depends upon the substantial drilling process in the case of Hybrid Carbon/Glass FRP composite laminate which has been examined through statistical technique. This paper deals with the statistical investigation of drill tool parameters on response variables through Taguchi Design of Experiments (DOE) and ANOVA. Here, an attempt is been made to study the effect of input variables (tool material, cutting speed, and feed rate) on response variables (Cylindricity and Ovality) after drilling hybrid Carbon/Glass FRP laminates which have been analysed through Taguchi L 27  array using Minitab software. The experimental investigation statistically reveals that tool material was found to be the most influencing factor with the highest percentage contribution in the case of cylindricity and ovality followed by secondary variables extracted through response and variance analysis. Based on the obtained results, the moderate combinations of machining parameters have been determined. The study indicates that the moderate cutting speed leads to better cylindricity and higher cutting speed leads to better ovality at a higher feed rate. The coefficient of determination R 2  was observed to be significant as per ANOVA.

Statistical analysis of drilled hole parameters during machining of carbon/glass FRP laminates