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Characterization of a New Dry Drill-Milling Process of Carbon Fibre Reinforced Polymer Laminates

Carbon Fibre Reinforced Polymer (CFRP) composites are widely used in aerospace applications that require severe quality parameters. To simplify the assembly operations and reduce the associated costs, the current trend in industry is to optimize the drilling processes. However, the machining of CFRP...

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Detalles Bibliográficos
Autores principales: Caggiano, Alessandra, Improta, Ilaria, Nele, Luigi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6120020/
https://www.ncbi.nlm.nih.gov/pubmed/30126200
http://dx.doi.org/10.3390/ma11081470
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author Caggiano, Alessandra
Improta, Ilaria
Nele, Luigi
author_facet Caggiano, Alessandra
Improta, Ilaria
Nele, Luigi
author_sort Caggiano, Alessandra
collection PubMed
description Carbon Fibre Reinforced Polymer (CFRP) composites are widely used in aerospace applications that require severe quality parameters. To simplify the assembly operations and reduce the associated costs, the current trend in industry is to optimize the drilling processes. However, the machining of CFRP composites is very challenging compared with metals, and several defect types can be generated by drilling. The emerging process of orbital drilling can greatly reduce the defects associated with the traditional drilling of CFRP, but it is a more complex process requiring careful process parameters selection and it does not allow for the complete elimination of the thrust force responsible for delamination damage. As an alternative to traditional and orbital drilling, this work presents a new hole making process, where the hole is realized by a combination of drilling and peripheral milling performed using the same cutting tool following a novel tool path strategy. An original tool design principle is proposed to realize a new drill-milling tool, made of a first drilling and a subsequent milling portion. Two different tool configurations are experimentally tested to evaluate the performance of the newly-conceived combined drill-milling process. This process is quick and easy, and the experimental results show an improvement in the drilled hole quality.
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spelling pubmed-61200202018-09-05 Characterization of a New Dry Drill-Milling Process of Carbon Fibre Reinforced Polymer Laminates Caggiano, Alessandra Improta, Ilaria Nele, Luigi Materials (Basel) Article Carbon Fibre Reinforced Polymer (CFRP) composites are widely used in aerospace applications that require severe quality parameters. To simplify the assembly operations and reduce the associated costs, the current trend in industry is to optimize the drilling processes. However, the machining of CFRP composites is very challenging compared with metals, and several defect types can be generated by drilling. The emerging process of orbital drilling can greatly reduce the defects associated with the traditional drilling of CFRP, but it is a more complex process requiring careful process parameters selection and it does not allow for the complete elimination of the thrust force responsible for delamination damage. As an alternative to traditional and orbital drilling, this work presents a new hole making process, where the hole is realized by a combination of drilling and peripheral milling performed using the same cutting tool following a novel tool path strategy. An original tool design principle is proposed to realize a new drill-milling tool, made of a first drilling and a subsequent milling portion. Two different tool configurations are experimentally tested to evaluate the performance of the newly-conceived combined drill-milling process. This process is quick and easy, and the experimental results show an improvement in the drilled hole quality. MDPI 2018-08-18 /pmc/articles/PMC6120020/ /pubmed/30126200 http://dx.doi.org/10.3390/ma11081470 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Caggiano, Alessandra
Improta, Ilaria
Nele, Luigi
Characterization of a New Dry Drill-Milling Process of Carbon Fibre Reinforced Polymer Laminates
title Characterization of a New Dry Drill-Milling Process of Carbon Fibre Reinforced Polymer Laminates
title_full Characterization of a New Dry Drill-Milling Process of Carbon Fibre Reinforced Polymer Laminates
title_fullStr Characterization of a New Dry Drill-Milling Process of Carbon Fibre Reinforced Polymer Laminates
title_full_unstemmed Characterization of a New Dry Drill-Milling Process of Carbon Fibre Reinforced Polymer Laminates
title_short Characterization of a New Dry Drill-Milling Process of Carbon Fibre Reinforced Polymer Laminates
title_sort characterization of a new dry drill-milling process of carbon fibre reinforced polymer laminates
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6120020/
https://www.ncbi.nlm.nih.gov/pubmed/30126200
http://dx.doi.org/10.3390/ma11081470
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