Improvement in Stretch Flangeability of<br>Ultra High Strength Steel Sheets with Punch Having Gradual Contact

DOI Web Site 4 Citations 14 References

Bibliographic Information

Other Title
  • 逐次接触パンチによる超高張力鋼板の<br>伸びフランジ成形性の向上
  • チクジ セッショク パンチ ニ ヨル チョウコウチョウリョク コウハン ノ ノビ フランジ セイケイセイ ノ コウジョウ

Search this article

Abstract

To improve the stretch flangeability of ultra high strength steel sheets having a low ductility, flanging with a punch having gradual contact was developed. The tensile stress on the corner of the sheet flange was reduced by using angle of inclination of the punch. Although the stretch flanging ratio decreased as the angle and width of the punch inclination increased, the fracture on the corner of the sheet flange appeared at the limiting stretch flanging ratio. The large camber on the upper surface of the sheet after flanging with the punch was observed. The optimum angle and width of the punch inclination for the prevention of the occurrence of fracture were calculated using finite element simulation under a limited punch stroke. The limited flange length of the sheet with the optimum punch showed an increase of 30% for the 980 MPa grade ultra high strength steel sheet.

Journal

Citations (4)*help

See more

References(14)*help

See more

Related Projects

See more

Keywords

Details 詳細情報について

Report a problem

Back to top