穴抜きダイ刃先面取りによる穴広げ率の向上

DOI Web Site Web Site 参考文献30件

書誌事項

タイトル別名
  • Improvement in Hole Expansion Ratio by Chamfered Die Edge
  • アナ ヌキ ダイ ハサキ メントリ ニ ヨル アナヒロゲ リツ ノ コウジョウ

この論文をさがす

抄録

In this study, a piercing method using a large chamfered die is proposed for the improvement in the hole expansion ratio. To validate this method, high-strength steels pierced by a large chamfered die were investigated. The result shows that holes pierced by the large chamfered die present a much higher hole expansion ratio than holes pierced by a conventional die, whereas a small chamfered die does not improve the hole expansion ratio. Additionally, as long as the chamfer value is above a specific value, the effect of the large chamfered die on the hole expansion ratio is independent of the chamfer value and the clearance between the punch and die. To clarify the mechanism of this improvement, the hardness close to the pierced surface and the material deformation process were analyzed. The hardness measurement indicated a decrease in the extent of work hardening when the hole was pierced by the large chamfered die. This contributes to the improvement in the hole expansion ratio. The decrease in the extent of work hardening is caused by material deformation without contact between the material and die, which leads to the suppression of shear deformation around the die edge.

収録刊行物

  • 塑性と加工

    塑性と加工 54 (627), 353-357, 2013

    一般社団法人 日本塑性加工学会

参考文献 (30)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ