The Influence of Lubricant Film Thickness on Friction Coefficients During Slow Speed Deep Drawing Operations
- 24 September 2002
- journal article
- Published by ASME International in Journal of Tribology
- Vol. 124 (4), 846-851
- https://doi.org/10.1115/1.1330732
Abstract
During some deep drawing operations liquid lubricants are used under the blankholder to reduce friction coefficients. Under the clamping action of the blankholder, lubricants will be squeezed out resulting in a changing film thickness after the initial application of the blankholder load. A relationship between kinetic friction coefficient values and the loading duration of the blankholder can be observed from analysis of results recorded during simulative testing. By using a numerical model to combine empirical measurements, friction coefficients during boundary lubrication, lubricant film thickness with sheet surface topography data, it can be shown that the coefficient of friction can reliably be predicted for a given loading duration.Keywords
This publication has 2 references indexed in Scilit:
- Refined Models for Hydrodynamic Lubrication in Axisymmetric Stretch FormingJournal of Tribology, 1994
- Isoviscous Hydrodynamic Lubrication of Deep Drawing and Its Comparison With ExperimentJournal of Tribology, 1993