Karataş, Meltem Altın2023-12-222023-12-222022Karataş, M. A. (2022). Evaluation of effect of machining parameters on surface roughness in drilling of glass fiber reinforced polymer (GFRP) composite material with different drill bits. Composites Theory and Practice, 22(2), 87-91.2084-60962299-128Xhttps://www.webofscience.com/wos/woscc/full-record/WOS:000825137100004https://hdl.handle.net/20.500.12491/11914In the present study, the arithmetical mean roughness (Ra) values obtained as a result of drilling glass fiber reinforced polymer (GFRP) composite material produced in fiber orientation angles (0 degrees/90 degrees) with different drill bits in a 5-axis CNC controlled vertical machining center, were analyzed. The experimental design was applied with the Taguchi method. The drilling experiments were performed using Minitab 19 software according to the Taguchi L-18 orthogonal array. The test results were evaluated based on the signal-to-noise (S/N) ratio. Two different drill bits (HSS and carbide), three different spindle speeds (750, 1000, 1500 rpm) and three different feed rates (0.05, 0.10, 0.15 mm/rev) were selected as the control factors. The effect levels of the control factors on Ra were found by applying analysis of variance (ANOVA). A confidence level of 95.62% was obtained with ANOVA analysis. The lowest Ra value was 1.279 mu m at the spindle speed of 1500 rpm and the feed rate of 0.05 mm/rev using a carbide drill bit. The drill bit type was obtained as the parameter with the highest effect with a rate of 61.33%.eninfo:eu-repo/semantics/closedAccessGlass Fiber Reinforced Polymer CompositeDrillingSurface RoughnessTool GeometryDelaminationVibrationArticle2228791Q4WOS:000825137100004N/A