Effect Of Drilling Parameters In Drilling Of Glass Fiber Reinforced VinylesterCarbon Black Nanocomposites

ABSTRACT This paper focused on investigating the effects of drilling parameters like spindle speed 600rpm 1860 rpm and 2700 rpm Feed rate 0.1mmrev 0.2mmrev and 0.3mmrev drill point angle 1180 1100 and 900 drill material HSS Co-HSS and Tungsten Carbide and carbon black 0 4 and 8 wt on the responses thrust force and delamination factor entry and exit in drilling of carbon black dispersed vinyl ester GFRP by Design of Experiments approach. Drilling experiments were designed to control the drilling parameters based on L27Orthogonal Array. The experimental results were analyzed using MINITAB V16. Signal-to-Noise SN ratio ANOVA and Grey Relation Analysis GRA were employed to analyze the effect of drilling parameters on the quality of the drilled holes. Minimum value of thrust force was obtained for 4 wt carbon black 2700 rpm 0.1 mmrev 1100 drill point angle and HSS drill. Delamination was minimum for 4 wt carbon black 2700rpm 0.1mmrev 4mm diameter with Tungsten Carbide WC drill. SEM confirmed that delamination at the exit is greater than delamination at the entry.