超高張力鋼板の穴縁部増肉加工による疲労強度の向上

• 安部 洋平

  豊橋技術科学大学大学院工学研究科

• Kadarno Purwo

  豊橋技術科学大学

• 森 謙一郎

  豊橋技術科学大学大学院工学研究科

• 安部 達朗

  豊橋技術科学大学

書誌事項

タイトル別名

• Improvement in Fatigue Strength of Ultra-high Strength Steel Sheets by Hole Thickening
• チョウコウチョウリョク コウバン ノ ケツエンブ ゾウニク カコウ ニ ヨル ヒロウ キョウド ノ コウジョウ

抄録

The edge of a punched hole was thickened by burring processes to improve the fatigue strength of punched ultra-high strength steel sheets. In this process, the sheet was punched by the bottom of the punch, and subsequently the hole edge was thickened by the taper of the punch and the corner step of the die. The fatigue strength of the hole edge thickened by burring was higher than that of the punched hole edge. The punching and the burring were combined into the punching process including thickening. The step height of the die was optimised to increase the height of the hole edge. The quality of the sheared edge for the thickened punched sheet was improved by ironing with the taper of the punch, and compressive residual stress was generated around the hole edge. It was found that the punching process including thickening is effective in improving the fatigue strength of the hole edge in ultra-high strength steel sheets and in preventing the occurrence of delayed fracture.

収録刊行物

• 塑性と加工

  塑性と加工 55 (645), 944-948, 2014

  一般社団法人 日本塑性加工学会

キーワード

• sheet metal forming
• ultra-high strength steel sheets
• thickening
• hole edge
• fatigue strength
• punching
• burring
• sheared edge.

詳細情報

• CRID: 1390001206499565184
• NII論文ID: 130004705482
• NII論文ID: 40020246618
• NII書誌ID: AN00135062
• DOI: 10.9773/sosei.55.944
• ISSN: 18820166
• ISSN: 00381586
• NDL書誌ID: 025878320
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I025878320
• Web Site: https://www.jstage.jst.go.jp/article/sosei/55/645/55_944/_pdf
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可