Friction and lubrication effects in the machining of aluminium alloys

Friction between the rake face of a cutting tool and the freshly formed chip surface plays a vital role in influencing both the ease of cutting and the quality of the resultant machined surface. The existence of clean metallic surfaces together with the high local hydrostatic stresses favour the for...

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Main Authors:	Liew, Willey Yun Hsien, I. M. Hutchings, J.A Williams
Format:	Article
Language:	English
Published:	Kluwer Academic Publishers-Plenum Publishers 1998
Subjects:	TJ Mechanical engineering and machinery
Online Access:	http://eprints.ums.edu.my/19898/ http://eprints.ums.edu.my/19898/ http://eprints.ums.edu.my/19898/1/Friction%20and%20lubrication%20effects%20in%20the%20machining%20of%20aluminium%20alloys.pdf

id	ums-19898
recordtype	eprints
spelling	ums-198982018-04-19T03:29:03Z http://eprints.ums.edu.my/19898/ Friction and lubrication effects in the machining of aluminium alloys Liew, Willey Yun Hsien I. M. Hutchings, J.A Williams, TJ Mechanical engineering and machinery Friction between the rake face of a cutting tool and the freshly formed chip surface plays a vital role in influencing both the ease of cutting and the quality of the resultant machined surface. The existence of clean metallic surfaces together with the high local hydrostatic stresses favour the formation of strong adhesion between the cutting tool or insert and the machined component. These adhesive bonds can lead to poor surface integrity although their extent can be limited by the provision of a suitable machining lubricant. In an effort to identify the essential lubricating aspects of fluid activity, as opposed to any role as a coolant, experiments have been carried out involving the orthogonal machining of precipitation‐hardened aluminium alloys, principally Al 2014, in controlled, low‐pressure gas environments in which the feed (i.e., the depth of cut) speed and temperature have been varied while using a variety of tool materials and lubricating species. The results indicate that there can be unexpectedly subtle, but significant, interactions between the metallurgy of the workpiece, the nature of the surface of the tool and the surrounding environment. These are not wholly consistent with conventional theories of vapour phase lubrication in which transport of the lubricant has been assumed to control the effectiveness of the lubricating agent. The implications of these observations for the complex tribological system constituted by the combination of workpiece, tool surface and local environment are discussed. Kluwer Academic Publishers-Plenum Publishers 1998-07 Article PeerReviewed text en http://eprints.ums.edu.my/19898/1/Friction%20and%20lubrication%20effects%20in%20the%20machining%20of%20aluminium%20alloys.pdf Liew, Willey Yun Hsien and I. M. Hutchings, and J.A Williams, (1998) Friction and lubrication effects in the machining of aluminium alloys. Tribology Letters, 5 (1). pp. 117-122. ISSN 1573-2711 https://doi.org/10.1023/A:1019164918708
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Sabah Malaysia
building	UMS Institutional Repository
collection	Online Access
language	English
topic	TJ Mechanical engineering and machinery
spellingShingle	TJ Mechanical engineering and machinery Liew, Willey Yun Hsien I. M. Hutchings, J.A Williams, Friction and lubrication effects in the machining of aluminium alloys
description	Friction between the rake face of a cutting tool and the freshly formed chip surface plays a vital role in influencing both the ease of cutting and the quality of the resultant machined surface. The existence of clean metallic surfaces together with the high local hydrostatic stresses favour the formation of strong adhesion between the cutting tool or insert and the machined component. These adhesive bonds can lead to poor surface integrity although their extent can be limited by the provision of a suitable machining lubricant. In an effort to identify the essential lubricating aspects of fluid activity, as opposed to any role as a coolant, experiments have been carried out involving the orthogonal machining of precipitation‐hardened aluminium alloys, principally Al 2014, in controlled, low‐pressure gas environments in which the feed (i.e., the depth of cut) speed and temperature have been varied while using a variety of tool materials and lubricating species. The results indicate that there can be unexpectedly subtle, but significant, interactions between the metallurgy of the workpiece, the nature of the surface of the tool and the surrounding environment. These are not wholly consistent with conventional theories of vapour phase lubrication in which transport of the lubricant has been assumed to control the effectiveness of the lubricating agent. The implications of these observations for the complex tribological system constituted by the combination of workpiece, tool surface and local environment are discussed.
format	Article
author	Liew, Willey Yun Hsien I. M. Hutchings, J.A Williams,
author_facet	Liew, Willey Yun Hsien I. M. Hutchings, J.A Williams,
author_sort	Liew, Willey Yun Hsien
title	Friction and lubrication effects in the machining of aluminium alloys
title_short	Friction and lubrication effects in the machining of aluminium alloys
title_full	Friction and lubrication effects in the machining of aluminium alloys
title_fullStr	Friction and lubrication effects in the machining of aluminium alloys
title_full_unstemmed	Friction and lubrication effects in the machining of aluminium alloys
title_sort	friction and lubrication effects in the machining of aluminium alloys
publisher	Kluwer Academic Publishers-Plenum Publishers
publishDate	1998
url	http://eprints.ums.edu.my/19898/ http://eprints.ums.edu.my/19898/ http://eprints.ums.edu.my/19898/1/Friction%20and%20lubrication%20effects%20in%20the%20machining%20of%20aluminium%20alloys.pdf
first_indexed	2018-09-05T09:38:34Z
last_indexed	2018-09-05T09:38:34Z
_version_	1610759867032666112

Friction and lubrication effects in the machining of aluminium alloys

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