Impact of different parameters in the drilling of CFRPs with nanocrystalline diamond coated tools

The drilling process of composite materials, such as the carbon fiber reinforced polymer (CFRP), constitutes a challenging task due to their inhomogeneous and anisotropic characteristics, besides the highly abrasive wear behaviour of their fibers. Accordingly, machining parameters should be carefull...

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Published in:U.Porto Journal of Engineering 2023-11, Vol.9 (5), p.89-97
Main Authors: Costa, Rúben, Silva, Tiago Fraga, Jesus, Abilio M.P. de, Silva, F. J. G., Vaz, M. A. P.
Format: Article
Language:English
Subjects:
CFRP
Drilling
Feed
Spindle speed
Surface quality
Tool geometry
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container_issue 5
container_start_page 89
container_title U.Porto Journal of Engineering
container_volume 9
creator Costa, Rúben
Silva, Tiago Fraga
Jesus, Abilio M.P. de
Silva, F. J. G.
Vaz, M. A. P.
description The drilling process of composite materials, such as the carbon fiber reinforced polymer (CFRP), constitutes a challenging task due to their inhomogeneous and anisotropic characteristics, besides the highly abrasive wear behaviour of their fibers. Accordingly, machining parameters should be carefully studied to optimize the process, leading to a better surface quality (avoiding defects in the CFRP) and to a lower wear behaviour of the cutting tool. This study proposed to test the drilling of a CFRP with a thermoplastic matrix using two different tool geometries (conventional and double-point angle drill) and varying two parameters, feed (f) and spindle speed (n), each one with two levels. It was concluded that the double-point angle drill with lower spindle speeds generates lower thrust force and torque values, as well as better hole quality. Higher spindle speeds combined with lower feeds result in fractured chips, in contrast with continuous chips for the other combinations.
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subjects CFRP
Drilling
Feed
Spindle speed
Surface quality
Tool geometry
title Impact of different parameters in the drilling of CFRPs with nanocrystalline diamond coated tools
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