高張力鋼板を用いたハットチャンネルの絞り－絞り戻し加工によるスプリングバック低減

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書誌事項

タイトル別名
  • Reduction of Springback for Hat Channel with High-Strength Steel Sheets by Stroke-Returning Deep-Drawing Process
  • コウチョウリョク コウバン オ モチイタ ハットチャンネル ノ シボリ : シボリ モドシ カコウ ニ ヨル スプリングバック テイゲン

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抄録

High-strength steel sheets are increasingly applied to automotive bodies for weight reduction in order to meet the needs for reduced environmental impact. However, dimensional defects resulting from springback are serious issues, and effective methods of predicting and reducing such defects are required. In this study, we propose and validate the advantage of the stroke-returning deep-drawing process, in which stroke is returned to the specified depth after drawing to the bottom dead point. The following results were obtained. Firstly, by the stroke-returning deep-drawing process, the twist angle became approximately zero. Secondly, the occurrence of bottom curvature made the sidewall curvature increase. Thirdly, when bottom curvature did not occur, sidewall curvature decreased in accordance with the equation of wide direction stress. Finally, the twist angle and sidewall curvature decreased concurrently upon deeply drawing and the greatly returning stroke process.

収録刊行物

  • 塑性と加工

    塑性と加工 57 (660), 60-65, 2016

    一般社団法人 日本塑性加工学会

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