Die design in fine-piercing process by chamfering cutting edge

Conference proceedings article

Authors/Editors

Strategic Research Themes

No matching items found.

Publication Details

Author list: Yiemchaiyaphum S., Masahiko J., Thipprakmas S.

Publisher: Trans Tech Publications

Publication year: 2010

Volume number: 443

Start page: 219

End page: 224

Number of pages: 6

ISBN: 0878492674; 9780878492671

ISSN: 1013-9826

eISSN: 1662-9795

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-77955457598&doi=10.4028%2fwww.scientific.net%2fKEM.443.219&partnerID=40&md5=9567d7cc9e883a55e73c0c2d0da2eb3c

Languages: English-Great Britain (EN-GB)

View in Web of Science | View on publisher site | View citing articles in Web of Science

Abstract

The hole quality on sheet metal parts is directly dependent on the die design and process parameters. In conventional piercing process, the secondary operations such as shaving, reaming and grinding are needed for manufacturing the precise-dimensioned holed parts without any cracks, resulting in the increase of both production time and costs. The fine-piercing process, referenced to the fine-blanking principle, is used to produce the precise-dimensioned holed parts with smooth-cut surfaces over the whole material thickness in a single operation. However, it is difficult to achieve the suitable die design and process parameters for meeting the part requirements. In this study, the die design by chamfering punch cutting edge was investigated on both the experiments and the finite-element method (FEM). The results were compared with the results obtained when the conventional die design with the punch cutting-edge radius was used. The FEM-simulation results showed the amount of die-roll, smooth-cut surface, and cracks agreed well with the experimental results. The results showed that an application of punch cutting-edge chamfer results in a superior fine-pierced hole surface could be achieved. Furthermore, the mechanism and effects of the punch cutting-edge chamfer have been theoretically clarified on basis of the material-flow analysis and stress distribution. ฉ (2010) Trans Tech Publications, Switzerland.

Keywords

Chamfering, Fine-piercing, Smooth-cut surface