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 language | English (US) |
|---|---|
| Pages (from-to) | 183-190 |
| Number of pages | 8 |
| Journal | Transactions of the North American Manufacturing Research Institute of SME |
| Volume | 32 |
| State | Published - Dec 17 2004 |
Keywords
- Burring
- Extrusion
- Forging
- Plastic Forming
- Press Working
- Sheet Metal Forming
- Thick Plate
- Upsetting
ASJC Scopus subject areas
- General Engineering