Indian Journal of Science and Technology
Year: 2015, Volume: 8, Issue: 31, Pages: 1-10
S. Senthil Babu1*, B. K. Vinayagam2 and J. Arunraj1
1 Department of Mechanical Engineering, Valliammai Engineering College, Chennai - 603203, Tamil Nadu, India; [email protected], [email protected]
2 School of Mechanical Engineering, SRM University, Chennai - 603203, Tamil Nadu, India; [email protected]
Hybrid composites are finding various applications in engineering fields because of their improved properties. We present a study on the factors influencing roughness, thrust force and ovality in drilling Al/Sic/Graphite hybrid composites. Al-6061 reinforced with Sic (10%) and graphite (5%) fabricated by stir casting in the form of square slabs of size 100 mm x 100 mm x 10 mm. The specimens were drilled using ARIX-CNC vertical machining center and investigated. Experiments were conducted as per Taguchi’s techniques with L27 orthogonal arrays using HSS and carbide tipped tool. The parameters considered were the spindle speeds (600, 1000 and 1400 rpm), feed rates (0.05, 0.10 and 0.15 mm/rev), and drill diameter (5, 7.5 and 10 mm). The Evaluations were done using response surface methodology and ANOVA. The results indicated that the overall performance of the drilling was better when using carbide tipped tool than HSS and feed rate is the factor predominantly influencing the force involved and roughness of the drilled hole.
Keywords: ANOVA, Drilling, Response Surface Methodology, Surface Roughness, Thrust Force and Ovality
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