Next Article in Journal
Effects of External Environments on the Fixed Elongation and Tensile Properties of the VAE Emulsion–Cement Composite Joint Sealant
Next Article in Special Issue
The Research of the Rolling Speed Influence on the Mechanism of Strip Breaks in the Steel Rolling Process
Previous Article in Journal
Lanthanum Ferrites-Based Exsolved Perovskites as Fuel-Flexible Anode for Solid Oxide Fuel Cells
Previous Article in Special Issue
Experimental Investigation and ANFIS-Based Modelling During Machining of EN31 Alloy Steel
Open AccessArticle

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

1
Sumy State University, Rymskogo-Korsakova Str., 2, 40007 Sumy, Ukraine
2
Faculty of Materials Science and Technology, Slovak University of Technology in Bratislava, Vazovova 5, 81243 Bratislava, Slovakia
*
Author to whom correspondence should be addressed.
Materials 2020, 13(14), 3232; https://doi.org/10.3390/ma13143232
Received: 18 June 2020 / Revised: 9 July 2020 / Accepted: 16 July 2020 / Published: 20 July 2020
(This article belongs to the Special Issue Machining and Manufacturing of Alloys and Steels)
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. View Full-Text
Keywords: CFRP/Ti alloy stack; drill thermal expansion; drilling temperature; hole diameter; roundness CFRP/Ti alloy stack; drill thermal expansion; drilling temperature; hole diameter; roundness
Show Figures

Figure 1

MDPI and ACS Style

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, 3232.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop