Influence of drill geometry on thrust force in drilling GFRP composites

Abstract

In this article, influence of drill geometry on thrust force in drilling GFRP composites is analyzed. Glass fiber-reinforced composite materials are finding increased application in different fields such as automobile, ship building, sport goods, etc., due to their excellent properties. Drilling is indispensable process and it cannot be avoided for joining composite structures. In this study, drilling experiments are conducted on these composite materials using CNC drilling machine. Three different drill bits are used for the experimentation. The response analyzed is thrust force. The influence of drill geometry on thrust force in drilling of composite materials is carried out using three different drill bits, namely, ‘Brad and Spur’ drill, ‘multifaceted’ drill, and ‘step’ drill. The analyses of the results are carried out using effect graphs and three-dimensional graphs. The results indicated that the step drills are performing better than the other drills considered.