Development of new burring process for thick plates

Kuniaki Dohda*, Zhrgang Wang, Naoki Yokoyama, Yoshikuni Kobayashi, Katsuyoshi Hirasawa

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

A new extrusion-burring formation process is proposed to produce parts with a flange from a thick plate. The features of this newly devised extrusion-burring process have been investigated in detail using FEM analysis and verified by a series of experiments using aluminum plates. In the extrusion-burring process, a drawn cup is extruded by pushing its wall downwards and the extruded material flows into the flange portion. With additional extrusion strokes, the material in the flange portion thickens and lengthens. The flange height after the burring process can be successfully increased by lengthening the extrusion stroke. However, □an excessive extrusion stroke length results in fractures at the base of the flange, because the burring process is very similar to the ironing process.

Original languageEnglish (US)
Pages (from-to)183-190
Number of pages8
JournalTransactions of the North American Manufacturing Research Institute of SME
Volume32
StatePublished - Dec 17 2004

Keywords

  • Burring
  • Extrusion
  • Forging
  • Plastic Forming
  • Press Working
  • Sheet Metal Forming
  • Thick Plate
  • Upsetting

ASJC Scopus subject areas

  • Engineering(all)

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