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

doi:10.1016/S0007-8506(07)63166-7

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 journal › Journal article › Research › peer-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 language	English
Journal	C I R P Annals
Volume	48
Issue number	1
Pages (from-to)	203-208
ISSN	0007-8506
DOIs	https://doi.org/10.1016/S0007-8506(07)63166-7
Publication status	Published - 1999

Keywords

Lubrication mechanisms
Metal forming
Surface topography

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10.1016/S0007-8506(07)63166-7

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title = "A basic study of the influence of surface topography on mechanisms of liquid lubrication in metal forming",

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",

author = "S{\o}rensen, \{C. G\} and Andreasen, \{Jan Lasson\} and Bech, \{Jakob Ilsted\} and Niels Bay and U Engel and T Neudecker",

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doi = "10.1016/S0007-8506(07)63166-7",

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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

M3 - Journal article

SN - 0007-8506

VL - 48

SP - 203

EP - 208

JO - C I R P Annals

JF - C I R P Annals

IS - 1

ER -

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

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