Authors: D.D. Olsson, N. Bay, J.L. Andreasen
Addresses: FL Schmidt, R&D Centre Dania, Daniavej 49, dk-9550 Mariager, Denmark. ' Department of Mechanical Engineering, Technical University of Denmark, Building 425, dk-2800 Kgs, Lyngby, Denmark. ' Novo Nordisk, Brennum Park 20BS.41, dk-3400 Hilleroed, Denmark
Abstract: A tribological test for deep drawing has been developed by which the performance of lubricants may be evaluated quantitatively measuring the maximum backstroke force on the punch owing to friction between tool and workpiece surface. The forming force is found not to give useful information regarding the lubricant performance, since it is not sensitive enough to reveal changes in the frictional contact, whereas the backstroke force is very sensitive to pick-up and galling even on micro-scale. Results from testing different lubricants with different performances are found to be consistent with visual judgement of the resulting surface of the drawn cups.
Keywords: deep drawing; tribology; lubricant testing; lubricants; backstroke force; friction; forming force; lubricant performance.
International Journal of Surface Science and Engineering, 2010 Vol.4 No.1, pp.2 - 12
Published online: 30 Nov 2009 *Full-text access for editors Access for subscribers Purchase this article Comment on this article