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

被引：0

作者：

Sørensen, C.G. ^{[1
]}

Bech, J.I. ^{[1
]}

Andreasen, J.L. ^{[1
]}

Bay, N. ^{[1
]}

Engel, U. ^{[2
]}

Neudecker, T. ^{[2
]}

机构：

[1] Dept. of Manufacturing Engineering, Technical University of Denmark, Lyngby, Denmark

[2] Chair of Manufacturing Technology, University of Erlangen, Nuremberg, Germany

来源：

CIRP Annals - Manufacturing Technology | 1999年 / 48卷 / 01期

关键词：

Aluminum - Fluid mechanics - Lubricating oils - Lubrication - Strip metal - Surface topography - Viscosity of liquids;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

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.

引用

页码：203 / 208