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Investigation on the Effect of Drill Geometry and Pilot Holes on Thrust Force and Burr Height When Drilling an Aluminium/PE Sandwich Material

Composite materials are widely employed in the naval, aerospace and transportation industries owing to the combination of being lightweight and having a high modulus of elasticity, strength and stiffness. Drilling is an operation generally used in composite materials to assemble the final product. D...

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Autores principales: Rezende, Bruna Aparecida, Silveira, Michele L., Vieira, Luciano M. G., Abrão, Alexandre M., de Faria, Paulo Eustáquio, Rubio, Juan C. Campos
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5457107/
https://www.ncbi.nlm.nih.gov/pubmed/28773895
http://dx.doi.org/10.3390/ma9090774
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author Rezende, Bruna Aparecida
Silveira, Michele L.
Vieira, Luciano M. G.
Abrão, Alexandre M.
de Faria, Paulo Eustáquio
Rubio, Juan C. Campos
author_facet Rezende, Bruna Aparecida
Silveira, Michele L.
Vieira, Luciano M. G.
Abrão, Alexandre M.
de Faria, Paulo Eustáquio
Rubio, Juan C. Campos
author_sort Rezende, Bruna Aparecida
collection PubMed
description Composite materials are widely employed in the naval, aerospace and transportation industries owing to the combination of being lightweight and having a high modulus of elasticity, strength and stiffness. Drilling is an operation generally used in composite materials to assemble the final product. Damages such as the burr at the drill entrance and exit, geometric deviations and delamination are typically found in composites subjected to drilling. Drills with special geometries and pilot holes are alternatives used to improve hole quality as well as to increase tool life. The present study is focused on the drilling of a sandwich composite material (two external aluminum plates bound to a polyethylene core). In order to minimize thrust force and burr height, the influence of drill geometry, the pilot hole and the cutting parameters was assessed. Thrust force and burr height values were collected and used to perform an analysis of variance. The results indicated that the tool and the cutting speed were the parameters with more weight on the thrust force and for burr height they were the tool and the interaction between tool and feed. The results indicated that drilling with a pilot hole of Ø4 mm exhibited the best performance with regard to thrust force but facilitated plastic deformation, thus leading to the elevation of burr height, while the lowest burr height was obtained using the Brad and Spur drill geometry.
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spelling pubmed-54571072017-07-28 Investigation on the Effect of Drill Geometry and Pilot Holes on Thrust Force and Burr Height When Drilling an Aluminium/PE Sandwich Material Rezende, Bruna Aparecida Silveira, Michele L. Vieira, Luciano M. G. Abrão, Alexandre M. de Faria, Paulo Eustáquio Rubio, Juan C. Campos Materials (Basel) Article Composite materials are widely employed in the naval, aerospace and transportation industries owing to the combination of being lightweight and having a high modulus of elasticity, strength and stiffness. Drilling is an operation generally used in composite materials to assemble the final product. Damages such as the burr at the drill entrance and exit, geometric deviations and delamination are typically found in composites subjected to drilling. Drills with special geometries and pilot holes are alternatives used to improve hole quality as well as to increase tool life. The present study is focused on the drilling of a sandwich composite material (two external aluminum plates bound to a polyethylene core). In order to minimize thrust force and burr height, the influence of drill geometry, the pilot hole and the cutting parameters was assessed. Thrust force and burr height values were collected and used to perform an analysis of variance. The results indicated that the tool and the cutting speed were the parameters with more weight on the thrust force and for burr height they were the tool and the interaction between tool and feed. The results indicated that drilling with a pilot hole of Ø4 mm exhibited the best performance with regard to thrust force but facilitated plastic deformation, thus leading to the elevation of burr height, while the lowest burr height was obtained using the Brad and Spur drill geometry. MDPI 2016-09-13 /pmc/articles/PMC5457107/ /pubmed/28773895 http://dx.doi.org/10.3390/ma9090774 Text en © 2016 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
Rezende, Bruna Aparecida
Silveira, Michele L.
Vieira, Luciano M. G.
Abrão, Alexandre M.
de Faria, Paulo Eustáquio
Rubio, Juan C. Campos
Investigation on the Effect of Drill Geometry and Pilot Holes on Thrust Force and Burr Height When Drilling an Aluminium/PE Sandwich Material
title Investigation on the Effect of Drill Geometry and Pilot Holes on Thrust Force and Burr Height When Drilling an Aluminium/PE Sandwich Material
title_full Investigation on the Effect of Drill Geometry and Pilot Holes on Thrust Force and Burr Height When Drilling an Aluminium/PE Sandwich Material
title_fullStr Investigation on the Effect of Drill Geometry and Pilot Holes on Thrust Force and Burr Height When Drilling an Aluminium/PE Sandwich Material
title_full_unstemmed Investigation on the Effect of Drill Geometry and Pilot Holes on Thrust Force and Burr Height When Drilling an Aluminium/PE Sandwich Material
title_short Investigation on the Effect of Drill Geometry and Pilot Holes on Thrust Force and Burr Height When Drilling an Aluminium/PE Sandwich Material
title_sort investigation on the effect of drill geometry and pilot holes on thrust force and burr height when drilling an aluminium/pe sandwich material
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5457107/
https://www.ncbi.nlm.nih.gov/pubmed/28773895
http://dx.doi.org/10.3390/ma9090774
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