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

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

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    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 Hydro Dynamic 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.
    Original languageEnglish
    JournalC I R P Annals
    Volume48
    Issue number1
    Pages (from-to)203-208
    ISSN0007-8506
    DOIs
    Publication statusPublished - 1999

    Keywords

    • Lubrication mechanisms
    • Metal forming
    • Surface topography

    Cite this

    Sørensen, C. G ; Andreasen, Jan Lasson ; Bech, Jakob Ilsted ; Bay, Niels ; Engel, U ; Neudecker, T. / A basic study of the influence of surface topography on mechanisms of liquid lubrication in metal forming. In: C I R P Annals. 1999 ; Vol. 48, No. 1. pp. 203-208.
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    abstract = "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 Hydro Dynamic 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",
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    A basic study of the influence of surface topography on mechanisms of liquid lubrication in metal forming. / Sørensen, C. G; Andreasen, Jan Lasson; Bech, Jakob Ilsted; Bay, Niels; Engel, U; Neudecker, T.

    In: C I R P Annals, Vol. 48, No. 1, 1999, p. 203-208.

    Research output: Contribution to journalJournal articleResearchpeer-review

    TY - JOUR

    T1 - A basic study of the influence of surface topography on mechanisms of liquid lubrication in metal forming

    AU - Sørensen, C. G

    AU - Andreasen, Jan Lasson

    AU - Bech, Jakob Ilsted

    AU - Bay, Niels

    AU - Engel, U

    AU - Neudecker, T

    PY - 1999

    Y1 - 1999

    N2 - 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 Hydro Dynamic 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.

    AB - 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 Hydro Dynamic 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.

    KW - Lubrication mechanisms

    KW - Metal forming

    KW - Surface topography

    U2 - 10.1016/S0007-8506(07)63166-7

    DO - 10.1016/S0007-8506(07)63166-7

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    JO - C I R P Annals

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