Surface Roughness Analyses in Drilling of CFRP Composite

Shetty, Divakara S and Rajat, Apurv and Shetty, Geet and Patil, Prathamesh (2017) Surface Roughness Analyses in Drilling of CFRP Composite. International Journal of Applied Engineering Research, 12 (20). pp. 9493-9499. ISSN 0973-4562

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Drilling is a commonly used machining process in carbon fiber reinforced polymer (CFRP) composite laminates in industries. The surface roughness while drilling of composite laminates is one of the generally used parameters for measuring the quality of the drilled holes. The present work aims to examine the consequences of process/cutting parameters such as spindle speed, drill diameter, feed rate and point angle on surface roughness while drilling of bi- directional carbon fiber reinforced polymer (BD CFRP) composite with TiN coated solid carbide tools. Taguchi design of experiments (DOE) is used for conducting the experiments and the Taguchi method is used for predicting the surface roughness. The study shows that the experimental and the predicted results of surface roughness are closely matches with each other and drill diameter has a maximum contribution on surface roughness, followed by spindle speed and feed rate. The point angle has an insignificant contribution on surface roughness. The study also shows that surface roughness decreases with increase in spindle speed, decrease in drill diameter and feed rate during drilling of composite. The minimum values of surface roughness (0.927 and 0.945) deduced in drilling of BD CFRP composite, indicating that TiN coated carbide tools can be used for drilling better quality of holes for structural applications.

Item Type: Article
Uncontrolled Keywords: surface roughness; drilling; carbide tools; composite material; anisotropy; fiber pull-out; Taguchi design of experiments.
Subjects: Engineering > MIT Manipal > Mechanical and Manufacturing
Depositing User: MIT Library
Date Deposited: 14 Nov 2017 08:54
Last Modified: 14 Nov 2017 08:54

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