Analysis of the Influents of Cutting Parameters in Drilling GFRP Composites Using Taguchi Method

Abstract

Carbon Fiber Reinforced Plastic (CFRP) is widely employed today, mainly in industries, due to its required properties of high corrosion resistance, high strength, and lightweight, this work studies the influence of the cutting parameters on the surface roughness by drilling two types of carbon-fiber-reinforced polymer composite material (CFRP) Composites 0° angle and 90° angle, the investigated of the drilling of CFRP by using an experimental design based on the Taguchi L18 orthogonal array. Spindle speed, feed rate, and tool diameter were the input parameters, and surface roughness was the output. The cutting settings (410, 806, and 1003) rpm and two different HSS tools were employed in the drilling operation of the CFRP composite. The feed rates used were (0.1, 0.2, and 0.3) mm/rev (at 10 and 12 mm in diameter). The Taguchi approach, the cutting speed, feed rate, and tool diameter were optimized to be 1003 rpm spindle speed, 0.1 mm/rev feed rate, and 10 mm, respectively, at a 0° angle, the surface roughness was 2.74 µm, while at a 90° angle, 4.12 µm, surface roughness was created by the Taguchi optimization of the surface for the cutting variables. According to the ANOVA analysis of the surface roughness (Ra) for CFRP/0-angles, The P-value of the factor feed rate was 0.044 less than 0.05, while the p-values of the tool diameter and spindle speed were greater than 0.05. At the CFRP/90-angle, the p-values of the factors feed rate and spindle speed were both less than 0.05, while the p-value of the tool diameter was 0.208.