Experimental Study of Drilling Temperature, Geometrical Errors and Thermal Expansion of Drill on Hole Accuracy When Drilling CFRP/Ti Alloy Stacks

Kolesnyk, Vitalii Oleksandrovych; Peterka, J.; Kuruc, M.; Simna, V.; Moravcíkova, J.; Vopat, T.; Lisovenko, Dmytro Volodymyrovych

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Title	Experimental Study of Drilling Temperature, Geometrical Errors and Thermal Expansion of Drill on Hole Accuracy When Drilling CFRP/Ti Alloy Stacks
Authors	Kolesnyk, Vitalii Oleksandrovych Peterka, J. Kuruc, M. Simna, V. Moravcíkova, J. Vopat, T. Lisovenko, Dmytro Volodymyrovych
ORCID	http://orcid.org/0000-0002-0417-3801 http://orcid.org/0000-0002-6699-4242
Keywords	CFRP/Ti alloy stack drill thermal expansion drilling temperature hole diameter roundness
Type	Article
Date of Issue	2020
URI	https://essuir.sumdu.edu.ua/handle/123456789/82818
Publisher	MDPI
License	Creative Commons Attribution 4.0 International License
Citation	Kolesnyk V, Peterka J, Kuruc M, Šimna V, Moravčíková J, Vopát T, Lisovenko D. Experimental Study of Drilling Temperature, Geometrical Errors and Thermal Expansion of Drill on Hole Accuracy When Drilling CFRP/Ti Alloy Stacks. Materials. 2020; 13(14):3232.
Abstract	The drilling of holes in CFRP/Ti (Carbon Fiber-Reinforced Plastic/Titanium alloy) alloy stacks is one of the frequently used mechanical operations during the manufacturing of fastening assemblies in temporary civil aircraft. A combination of inhomogeneous behavior and poor machinability of CFRP/Ti alloy stacks in one short drilling brought challenges to the manufacturing community. The impact of the drilling temperature and time delay factor under various cutting conditions on hole accuracy when machining CFRP/Ti alloy stacks is poorly studied. In this paper, the drilling temperature, the phenomenon of thermal expansion of the drill tool, and hole accuracy are investigated. An experimental study was carried out using thermocouples, the coordinate measuring machine method, and finite element analysis. The results showed that the time delay factor varied from 5 (s) to 120 (s), influences the thermal-dependent properties of CFRP, and leads to an increase in hole roundness. Additionally, the thermal expansion of the drill significantly contributes to the deviation of the hole diameter in Ti alloy.
Appears in Collections:	Наукові видання (ТеСЕТ)