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Composites made of Glass Fibres are finding increasing applications in various sectors because of their higher specific strength and better resistance to corrosion. Drilling is the most frequently used machining process used in the composite industry specifically for assembly purposes. The primary focus of this paper is on the factors that determine the quality of the drilled hole in Glass Fibre Reinforced Polymer composite materials. A slab with randomly oriented glass fibres was manufactured. Taguchi’s L 9  orthogonal array with varying diameter, spindle speed, and feed rates was used to design the experiment. Drilling was performed with Solid Carbide drill bit and thrust force was recorded. Post drilling, non-destructive tests for roughness, roundness, and delamination were conducted to characterise the drilled holes. The results showed that at lower feed rates and higher speed better quality of drilled holes were obtained.

Experimental evaluation of factors influencing drilling of randomly oriented fibre reinforced composite laminates