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Appl. Sci. 2017, 7(7), 667;

Impact of Cryogenic Condition and Drill Diameter on Drilling Performance of CFRP

Department of Mechanical Engineering, Mehmet Akif Ersoy University, Burdur 15030, Turkey
Natural and Applied Science, Mehmet Akif Ersoy University, Burdur 15030, Turkey
Department of Mechanical Engineering, Karamanoglu Mehmetbey University, Karaman 70100, Turkey
Author to whom correspondence should be addressed.
Academic Editor: Kerry Kirwan
Received: 4 April 2017 / Revised: 8 June 2017 / Accepted: 21 June 2017 / Published: 29 June 2017
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Machining of carbon fiber-reinforced polymer (CFRP) is a rather hard task due to the inhomogeneity and anisotropy of this material. Several defects occur in the material when CFRP is machined and machining quality deteriorates owing to these material properties. In recent years, liquid nitrogen has been considered an environmentally safe, clean, and non-toxic coolant used to cut various materials in order to enhance machinability and prevent damage during machining. In this study, a new, eco-friendly cryogenic machining technique called dipped cryogenic machining was applied for the drilling of CFRP. This experimental study investigated the effect of feed rate and drill diameter on the thrust force, delamination factor, surface quality and drill wear. Machined surfaces were analyzed in detail using a scanning electron microscope and atomic force microscope. Results indicated that the drilling of CFRP with the dipped cryogenic machining approach greatly improved machinability by reducing the surface roughness of the drilled parts and tool wear. However, it increased the thrust force and delamination factor. View Full-Text
Keywords: CFRP; cryogenic; drilling; drill wear; surface quality CFRP; cryogenic; drilling; drill wear; surface quality

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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MDPI and ACS Style

Basmaci, G.; Yoruk, A.S.; Koklu, U.; Morkavuk, S. Impact of Cryogenic Condition and Drill Diameter on Drilling Performance of CFRP. Appl. Sci. 2017, 7, 667.

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