Characterization of Machining Parameters on Thrust Force and Surface Roughness in Drilling of 40-60 Wt. % BD CFRP Composite

Shetty, Divakara S and Shetty, Nagaraj and Rajat, Apurv and Shetty, Geet (2017) Characterization of Machining Parameters on Thrust Force and Surface Roughness in Drilling of 40-60 Wt. % BD CFRP Composite. International Journal of Applied Engineering Research, 12 (16). pp. 5570-5577. ISSN 0973-4562

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Abstract

Thrust force is cited as the main cause for delamination and surface roughness in drilling of carbon fiber reinforced polymer (CFRP) composites. Drilling of CFRP composites is one of the most frequently used machining operations in the modern industries for structural assemblies. The effectiveness of drilling operation is mainly based on delamination and surface roughness. The reduction in thrust force reduces the drilling induced delamination and surface roughness and improves the quality of the drilled holes required for structural joints. The current research aims to analyze the effect of machining parameters (spindle speed, drill diameter, feed rate and point angle) on thrust force and surface roughness in drilling of bi-directional carbon fiber reinforced polymer (BD CFRP) composite with TiN coated solid carbide drills. Taguchi L27 orthogonal array is used for formulating the experimental layout and the Taguchi method is also employed for predicting thrust force and surface roughness. The investigation reveals that the experimental and the predicted results of thrust force and surface roughness are in good agreement. It is evident from the study that drill diameter has a significant contribution on thrust force and surface roughness, followed by spindle speed, feed rate and point angle. It is also evident from the study that both thrust force and surface roughness decreases with increase in spindle speed in drilling of BD CFRP composite with TiN coated solid carbide drills. The experimental results show that drill diameter of 4 mm, spindle speed of 1800 rpm, feed rate of 20 mm/min and point angle of 90° are the optimum machining parameters needed for minimum thrust force and surface roughness. The results also show that there is a direct correlation between thrust force and surface roughness developed during drilling of BD CFRP composite.

Item Type: Article
Uncontrolled Keywords: BD CFRP composite; drilling;solid carbide drills; thrust force; surface roughness; delamination; fiber pull-out.
Subjects: Engineering > MIT Manipal > Mechanical and Manufacturing
Depositing User: MIT Library
Date Deposited: 16 Sep 2017 08:26
Last Modified: 16 Sep 2017 08:26
URI: http://eprints.manipal.edu/id/eprint/149693

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