プラスチック板の深絞り加工の限界絞り比の予知

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タイトル別名
  • Prediction of Limit Drawing Ratio for Deep-Drawn Plastic Sheet
  • プラスチックバン ノ フカシボリ カコウ ノ ゲンカイ シボリヒ ノ ヨチ

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説明

The limit drawing ratio is important in manufacturing deep-drawn cylindrical products because it determines the size of the products.<br>In this paper, a simple method for determining the limit drawing ratio of deep-drawing plastic sheet is proposed. A Rockwell superficial hardness tester (HR15-Y) was used to measure the impression depth with or without a test load and the limit drawing ratio was expressed as a function of the ratio of the two values obtained.<br>The experimental results indicate that the limit drawing ratio (LDR) for plastic sheet can be given by one of the following formula:<br>(1) When the material yield conditions follow the maximum shearing stress theory, <br>LDR=e(h0/hp+0.5)<br>(2) When the material yield conditions follow the maximum main stress theory, <br>LDR=1+(h0/hp+0.5)<br>where h0=impression depth without test load<br>hp=impression depth with test load<br>e=natural logarithm

収録刊行物

  • 材料

    材料 32 (360), 997-1003, 1983

    公益社団法人 日本材料学会

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