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Open AccessArticle

An Experimental Investigation on Bushing Geometrical Properties and Density in Thermal Frictional Drilling

1
Department of Mechanical Engineering, Faculty of Engineering and Architecture, Batman University, Batman 72100, Turkey
2
Department of Mechanical Engineering, Faculty of Technology, Firat University; Elazig 23000, Turkey
*
Author to whom correspondence should be addressed.
Appl. Sci. 2018, 8(12), 2658; https://doi.org/10.3390/app8122658
Received: 8 November 2018 / Revised: 4 December 2018 / Accepted: 13 December 2018 / Published: 18 December 2018
(This article belongs to the Section Mechanical Engineering)
In thermal friction drilling (TFD) operations, the geometrical dimensions of bushing shape, height and wall thickness are the most vital consequences, since these increase the connecting length and strength. In this paper, AA7075-T651 aluminum alloys with 2, 4, 6, 8, and 10 mm thicknesses were drilled with the TFD process in order to investigate density, volume ratio, and height and wall thickness of the bushings. The experiments were conducted at constant spindle speed and feed rate conditions by using High Speed Steel (HSS) conical tools of 5, 10, 15, and 20 mm in diameter. It was experimentally found that the bushing height and the wall thickness had a tendency to increase linearly with the increase in both material thickness and tool diameter. The effect of tool diameter was found to have more influence on the measurable values than the thickness of the drilled material. The density of the bushing changed trivially. Approximately 70–75 percent of the evacuated material formed the bushing shape in TFD operations. View Full-Text
Keywords: thermal friction drilling; bushing density; bushing shape; bushing height; bushing volume ratio; bushing wall thickness thermal friction drilling; bushing density; bushing shape; bushing height; bushing volume ratio; bushing wall thickness
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MDPI and ACS Style

Demir, Z.; Özek, C.; Bal, M. An Experimental Investigation on Bushing Geometrical Properties and Density in Thermal Frictional Drilling. Appl. Sci. 2018, 8, 2658.

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