Theoretical investigation of friction at die/billet interface in hydrostatic extrusion of commercially pure aluminum

被引：0
|
作者：
Tomar, Pankaj [1 ]
机构：
[1] IGDT Univ Women, MAE Dept, Delhi 110403, India
来源：
3RD INTERNATIONAL CONFERENCE ON INNOVATIONS IN AUTOMATION AND MECHATRONICS ENGINEERING 2016, ICIAME 2016 | 2016年 / 23卷
关键词：
Extrusion pressure; viscous heating; semi-die angle; Tresca friction factor; reynolds equation; HYDRODYNAMIC LUBRICATION;
D O I：
10.1016/j.protcy.2016.03.033
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
The investigation of friction at the die billet interface in hydrostatic extrusion process is vital issue as it is affected by various operating conditions. In presence of pressurized lubricant chamber or hydrostatic extrusion pressure a lubricant film is formed at the interfacial contact in hydrostatic extrusion process. Existence of lubricating film at the interfacial contact drastically reduces friction and its optimization is needful as thick lubricating film produces unconstrained deformation on the billet surface and thin lubricating film enhances friction on the interfacial contact. Therefore, the purpose of this paper is to carry out theoretical investigation of friction at die/billet interface in hydrostatic extrusion process of commercially pure aluminum under various operating parameters using a Roelands' viscosity model. The Tresca's friction factors at the interfacial contact of die/billet increases on increase of semi-die angle of die and decreases on increase of extrusion pressure due to more favourable lubrication conditions. (C) 2016 Elsevier Ltd.
引用
收藏
页码：319 / 327
页数：9
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