深絞りのしわに関する限界条件 : 第1報, 解析の基礎およびしわ押えのない場合の結果

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タイトル別名
  • Critical Conditions of Wrinkling in Deep Drawing of Sheet Metals : 1st Report, Foundations of Analyses and Results for Conditions is No Blank-Holding
  • フカシボリ ノ シワ ニ カンスル ゲンカイ ジョウケン 1 3

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抄録

In this investigation, the author examined the emtirical phenomena of wrinkling and accounted for the mechanisms of preventing wrinkling in deep drawing operations, and concurrently infered theoretically the formulas to predict the critical conditions of wrinkling which are not inconsistent with the experimental results. As the first report, the foundations of analytical methods and the results for conditions of no blank-holding are reported. From the equilibrium equation of moments on half the wave-length of flange wrinkles, the critical conditions of wrinkling were induced and discussed for the case where no blank-holding plate is used. Consequently, the theoretical formulas which predict the number of waves and the critical blank thickness were found to agree well with the experimental results.

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