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

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...

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Bibliographic Details
Published in:Applied sciences 2017-06, Vol.7 (7), p.667
Main Authors: Basmaci, Gültekin, Yoruk, A., Koklu, Ugur, Morkavuk, Sezer
Format: Article
Language:English
Subjects:
Aluminum
Anisotropy
Atomic force microscopes
Atomic force microscopy
Carbon
Carbon fiber reinforced plastics
Composite materials
Cooling
Cutting tools
Damage prevention
Delamination
Drilling
Epoxy resins
Experiments
Feed rate
Fiber reinforced polymers
Inhomogeneity
Liquid nitrogen
Machinability
Machining
Material properties
Nitrogen
Polymers
Scanning electron microscopy
Surface properties
Surface roughness
Thrust
Tool wear
Wear
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Summary: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.
ISSN:2076-3417
2076-3417
DOI:10.3390/app7070667