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Drilling of CFRP Using a Solid Carbide Twist Drill

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Abstract:

Secondary machining of Carbon Fibre-Reinforced Polymer (CFRP) is crucial for achieving precise dimensions and high-quality finishes in manufacturing. However, CFRP's anisotropic and heterogeneous properties present challenges, including delamination, high thrust forces, and excessive tool wear, which can compromise the final products' mechanical integrity and durability. Optimizing machining processes to minimize these issues and enhance tool life is a significant area of research. This study focuses on CFRP drilling operations, investigating the effects of varying feed rates and spindle speeds on critical machining parameters such as delamination factors. Experiments utilize CFRP made of TRH50 fibre and NCT 301 resin, with a solid carbide-tip and diamond-coated tool featuring a stainless-steel body. The research aims to provide insights into the interactions between machining parameters and CFRP properties, contributing to the development of optimized machining strategies for improved performance and product quality. Preliminary findings revealed visible exit and entry delamination during the drilling operation.

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Periodical:

Key Engineering Materials (Volume 1058)

Pages:

145-151

DOI:

https://doi.org/10.4028/p-l1Ju5y

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Online since:

June 2026

Authors:

Sekove Rokovereni Tuisuva*, Junior Nomani, Zhan Chen, Ashwin Polishetty

Keywords:

CFRP, Delamination, DID, Drilling

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© 2026 Trans Tech Publications Ltd. All Rights Reserved

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* - Corresponding Author

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