Entrapment and escape of liquid lubricant in metal forming

被引：60

作者：

Bech, J ^{[1
]}

Bay, N ^{[1
]}

Eriksen, M ^{[1
]}

机构：

[1] Tech Univ Denmark, Dept Mfg Engn, Lyngby 2800, Denmark

来源：

WEAR | 1999年 / 232卷 / 02期

关键词：

liquid lubrication mechanisms; surface pockets; friction; metal forming;

D O I：

10.1016/S0043-1648(99)00136-2

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Using a transparent tool entrapment, compression and eventual escape of liquid lubricant in surface pockets is observed in plane strip drawing. The two mechanisms of lubricant escape. Micro Plasto HydroDynamic and Hydrostatic Lubrication (MPHDL and MPHSL), are observed and quantified experimentally with Varying viscosity, speed, reduction, workpiece material, back tension and friction. The mechanisms are influenced by all these parameters in an explicable way. Theoretical models of the escape mechanisms are established combining continuum mechanic analyses of the die pressure distribution with a fluid mechanic analysis of the lubricant escape. Oscillations in the drawing force are caused by the local escape of lubricant. (C) 1999 Elsevier Science S.A. All rights reserved.

引用

页码：134 / 139

页数：6