Coining process as a means of controlling surface microgeometry

被引：50

作者：

Ike, H ^{[1
]}

Plancak, M ^{[1
]}

机构：

[1] RIKEN, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan

来源：

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY | 1998年 / 80-1卷

关键词：

coining; surface microgeometry; closed die forging; microscopic bulge; bulk deformation; surface deformation; upper bound;

D O I：

10.1016/S0924-0136(98)00101-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A typical coining process as a microscopic closed die forging is experimentally and numerically analyzed. The designed surface microgeometry to be formed on the blank is uniformly distributed surface microprojections of 175 mu m diameter and 28 mu m height at the pitch of 260 mu m. The evolution of the microbulging and filling behavior in the die microcavities are experimentally analyzed. The independence of the formation of surface microgeometry on the bulk plastic flow is observed. The delayed bulk metal flow subsequent to microforming yields shearing off of the surface microprojections. The average contact pressure is compared with calculation of the upper bound modeling. The possibility of separate analyses of local-micro and global-macro deformation and the integration is suggested. (C) 1998 Elsevier Science S.A. All rights reserved.

引用

页码：101 / 107

页数：7

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