Evaluation on advantages of low frequency assisted drilling (LFAD) aluminium alloy Al7075

Fernando Veiga; Alfredo Suárez; Alain Gil Del Val; Mariluz Penalva; Luis Norberto Lopez de Lacalle

doi:10.1504/IJMMS.2020.111283

Evaluation on advantages of low frequency assisted drilling (LFAD) aluminium alloy Al7075

Fernando Veiga^*, Alfredo Suárez, Alain Gil Del Val, Mariluz Penalva, Luis Norberto Lopez de Lacalle

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

Drilling operation of dissimilar stack materials is a crucial assembly operation in airframe manufacturing; this is due to both the number of holes drilled in an aircraft structure and the fact that this is an operation performed in the finishing phase of the manufacturing chain. This paper aims to evaluate an alternative strategy for conventional drilling and peck drilling, which are now the most widespread solutions used for drilling aluminium alloys. The alternative approach proposed by this paper consists of low frequency assisted drilling (LFAD) performed into frequencies vibrations (between 50 to 100 Hz). In this paper, the chip formation process of drilling assisted by low-frequency vibrations of FC/Al stack material has been analytically modelled and compared with the conventional drilling of aluminium. Results show chip segmentation during the drilling operation resulting in less temperature increasing, avoiding problems in the final geometrical quality of the hole, and burr formation.

Original language	English
Pages (from-to)	230-246
Number of pages	17
Journal	International Journal of Mechatronics and Manufacturing Systems
Volume	13
Issue number	3
DOIs	https://doi.org/10.1504/IJMMS.2020.111283
Publication status	Published - 2020

Funding

This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No. 723698. This paper reflects only the author’s views and the Commission is not responsible for any use that may be made of the information contained therein. This research was funded by the vice-counselling of technology, innovation and competitiveness of the Basque Government grant agreements IT-2005/00201, ZL-2019/00720 (HARDCRAFT project) and KK-2019/00004 (PROCODA project). This research was funded by the vice-counselling of technology, innovation and competitiveness of the Basque Government grant agreements IT-2005/00201, ZL-2019/00720 (HARDCRAFT project) and KK-2019/00004 (PROCODA project). This project has received funding from the European Union's Horizon 2020 research and innovation program under grant agreement No. 723698. This paper reflects only the author's views and the Commission is not responsible for any use that may be made of the information contained therein.

Funders	Funder number
European Union's Horizon 2020 research and innovation program
European Union’s Horizon 2020 research and innovation program	723698
Eusko Jaurlaritza	IT-2005/00201, KK-2019/00004, ZL-2019/00720

Keywords

Burrs
Chip formation
Chip thickness modelling
Drilling torque
Hole diameter
Hole quality
Vibration assisted drilling

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10.1504/IJMMS.2020.111283

Cite this

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title = "Evaluation on advantages of low frequency assisted drilling (LFAD) aluminium alloy Al7075",

abstract = "Drilling operation of dissimilar stack materials is a crucial assembly operation in airframe manufacturing; this is due to both the number of holes drilled in an aircraft structure and the fact that this is an operation performed in the finishing phase of the manufacturing chain. This paper aims to evaluate an alternative strategy for conventional drilling and peck drilling, which are now the most widespread solutions used for drilling aluminium alloys. The alternative approach proposed by this paper consists of low frequency assisted drilling (LFAD) performed into frequencies vibrations (between 50 to 100 Hz). In this paper, the chip formation process of drilling assisted by low-frequency vibrations of FC/Al stack material has been analytically modelled and compared with the conventional drilling of aluminium. Results show chip segmentation during the drilling operation resulting in less temperature increasing, avoiding problems in the final geometrical quality of the hole, and burr formation.",

keywords = "Burrs, Chip formation, Chip thickness modelling, Drilling torque, Hole diameter, Hole quality, Vibration assisted drilling",

author = "Fernando Veiga and Alfredo Su{\'a}rez and {Del Val}, {Alain Gil} and Mariluz Penalva and {de Lacalle}, {Luis Norberto Lopez}",

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AB - Drilling operation of dissimilar stack materials is a crucial assembly operation in airframe manufacturing; this is due to both the number of holes drilled in an aircraft structure and the fact that this is an operation performed in the finishing phase of the manufacturing chain. This paper aims to evaluate an alternative strategy for conventional drilling and peck drilling, which are now the most widespread solutions used for drilling aluminium alloys. The alternative approach proposed by this paper consists of low frequency assisted drilling (LFAD) performed into frequencies vibrations (between 50 to 100 Hz). In this paper, the chip formation process of drilling assisted by low-frequency vibrations of FC/Al stack material has been analytically modelled and compared with the conventional drilling of aluminium. Results show chip segmentation during the drilling operation resulting in less temperature increasing, avoiding problems in the final geometrical quality of the hole, and burr formation.

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Evaluation on advantages of low frequency assisted drilling (LFAD) aluminium alloy Al7075

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