A basic study of the influence of surface topography on mechanisms of liquid lubrication in metal forming

C. G. Sørensen, Jakob Ilsted Bech, Jan Lasson Andreasen, Niels Bay, U. Engell, T. Neudecker

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


    Applying a transparent tool technique the tool/workpiece interface in plane strip drawing of aluminium is studied. The strips are provided with macroscopic lubricant pockets, and the compression and eventual escape of trapped lubricant by the mechanisms Micro Plasto HydroDynamic Lubrication (MPHDL) and Micro Plasto HydroStatic Lubrication (MPHSL) is observed and quantified experimentally with respect to the lubricant pocket parameters, shape, volume, and angle to the edge. The two mechanisms have proved to depend very differently upon these parameters. The level at which the hydrostatic pressure is stabilised is shown to be independent of the volume of a pocket and the MPHDL mechanism is therefore solely dependent on the angle to the edge, which is shown both experimentally and theoretically by a fluid mechanic analysis. For the MPHSL mechanism a dependency of the volume is observed.Keywords: Lubrication mechanisms, Metal forming, Surface topography
    Original languageEnglish
    Title of host publicationProceedings of MP2M-Center Seminar & Symposium
    Place of PublicationLyngby, DK
    PublisherIPT, DTU
    Publication date1998
    Publication statusPublished - 1998
    EventMP2M-Center Seminar & Symposium - Kgs. Lyngby, Denmark
    Duration: 9 Dec 199810 Dec 1998


    SeminarMP2M-Center Seminar & Symposium
    CityKgs. Lyngby

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