The Influence of tool texture on friction and lubrication in strip reduction testing

Sulaiman, Mohd Hafis and Christiansen, Peter and Bay, Niels (2017) The Influence of tool texture on friction and lubrication in strip reduction testing. Lubricants, 5 (3). pp. 1-11. ISSN 2075-4442

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Abstract

While texturing of workpiece surfaces to promote lubrication in metal forming has been applied for several decades, tool surface texturing is rather new. In the present paper, tool texturing is studied as a method to prevent galling. A strip reduction test was conducted with tools provided with shallow, longitudinal pockets oriented perpendicular to the sliding direction. The pockets had small angles to the workpiece surface and the distance between them were varied. The experiments reveal that the distance between pockets should be larger than the pocket width, thereby creating a topography similar to flat table mountains to avoid mechanical interlocking in the valleys; otherwise, an increase in drawing load and pick-up on the tools are observed. The textured tool surface lowers friction and improves lubrication performance, provided that the distance between pockets is 2–4 times larger than the pocket width. Larger drawing speed facilitates escape of the entrapped lubricant in the pockets. Testing with low-to-medium viscosity oils leads to a low sheet roughness on the plateaus, but also local workpiece material pick-up on the tool plateaus. Large lubricant viscosity results in higher sheet plateau roughness, but also prevents pick-up and galling.

Item Type:	Article (Journal)
Additional Information:	9398/85686
Uncontrolled Keywords:	tool surface texture; lubricant entrapment; strip drawing test
Subjects:	T Technology > TS Manufactures > TS200 Metal manufactures. Metalworking
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 Mohd Hafis Sulaiman
Date Deposited:	14 Dec 2020 08:52
Last Modified:	14 Dec 2020 08:52
URI:	http://irep.iium.edu.my/id/eprint/85686

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