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 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 language | English |
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Title of host publication | Proceedings of MP2M-Center Seminar & Symposium |
Place of Publication | Lyngby, DK |
Publisher | IPT, DTU |
Publication date | 1998 |
Publication status | Published - 1998 |
Event | MP2M-Center Seminar & Symposium - Kgs. Lyngby, Denmark Duration: 9 Dec 1998 → 10 Dec 1998 |
Seminar
Seminar | MP2M-Center Seminar & Symposium |
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Country/Territory | Denmark |
City | Kgs. Lyngby |
Period | 09/12/1998 → 10/12/1998 |