The effect of chilled air on burr formation when drilling aluminium alloy in manufacturing industry

Meera Mydin, Nur Munirah and Dahnel, Aishah Najiah and A. Raof, Natasha and Muhamad Khairussaleh, Nor Khairusshima and Mokhtar, Suhaily (2021) The effect of chilled air on burr formation when drilling aluminium alloy in manufacturing industry. International Journal of Progressive Sciences and Technologies (IJPSAT), 28 (1). pp. 437-445. ISSN 2509-0119

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Abstract

Burr formation is a major challenge during drilling which could cause poor assembly and may lead to part rejection. One of the factors which could result in an increment of burr height and deteriorating the hole quality is poor selection of cutting parameters and drilling environment. aluminium alloy (Al7075) is usually drilled in dry condition due to the concern over the use and disposal of cutting fluid which could lead to environmental pollution. However, dry drilling can cause high heat generation which can highly influence the burr formation. Therefore, this research aims to investigate the effectiveness of chilled air as a cooling medium in drilling Al7075 to improve the machined surface integrity in aspects of burr formation. Drilling operations of Al7075 were performed at cutting speeds and feed rates of 82 - 123 m/min and 0.01 - 0.1 mm/rev. The lowest burr height was obtained when drilling using the higher cutting speed and feed rate of 123 m/min and 0.01 mm/rev. Whereas, the lowest burr thickness was obtained when drilling using the lower cutting speed and feed rate of 82 m/min and 0.01 mm/rev. This indicates that the use of chilled air when drilling Al7075 is favorable to reduce the burr formation at higher cutting speed and feed rate hence improving the productivity.

Item Type:	Article (Journal)
Additional Information:	8299/94035
Uncontrolled Keywords:	Burr; Drilling; Chilled Air; Aluminium Alloy.
Subjects:	T Technology > T Technology (General) T Technology > T Technology (General) > T55.4 Industrial engineering.Management engineering. > T58.7 Production capacity. Manufacturing capacity T Technology > TJ Mechanical engineering and machinery
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering Kulliyyah of Engineering
Depositing User:	Dr Aishah Najiah Dahnel
Date Deposited:	23 Nov 2021 15:31
Last Modified:	23 Nov 2021 15:31
URI:	http://irep.iium.edu.my/id/eprint/94035

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