Use of UBET for design of flash gap in closed-die forging

被引：13

作者：

Ranatunga, V

Gunasekera, JS

Frazier, WG

Hur, KD

机构：

[1] Dong Eui Univ, Dept Mech Engn, Pusanjin Ku, Pusan 614714, South Korea

[2] Ohio Univ, Dept Mech Engn, Athens, OH 45701 USA

[3] USAF, Res Lab, Dayton, OH USA

来源：

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY | 2001年 / 111卷 / 1-3期

关键词：

flash gap; closed-die forging; UBET; axisymmetric dies;

D O I：

10.1016/S0924-0136(01)00491-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

An upper bound elemental technique (UBET) has been proposed for the design of the flash gay in closed-die forging operations of axisymmetric shapes. The developed method has been applied to analyze the forging load, die-cavity filling, and effective strain and strain rate distributions in axisymmetric closed-die forging with a rib-web type of cavity. The forging process has been superimposed with two sub-stages called the extrusion and the back-fill stages. The total die load required for extrusion and back fill are calculated separately and a maximum allowable extrusion gap is proposed for a given percentage die-fill. FEM simulations have been carried out with different die geometries and the results are in good agreement with UBET predictions. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：107 / 112

页数：6