塑性と加工
Online ISSN : 1882-0166
Print ISSN : 0038-1586
ISSN-L : 0038-1586
論文
段差付きビーム部品のしわ,ねじれを改善する最適ドロービード形状の決定
安部 重毅森下 勇樹坂元 康泰近藤 裕樹日野 隆太郎吉田 総仁
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ジャーナル フリー

2012 年 53 巻 620 号 p. 831-835

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抄録

In this paper, we propose a new method of suppressing the wrinkle and torsional springback in sheet metal forming by FE simulation. The key technique is the determination of the optimum shape and height of drawbeads by an optimization technique. To demonstrate this technique for the forming of a Stepped-shape beam using a high-strength steel sheet, we show a new approach to evaluating the degree of wrinkle based on the curvature distribution in wrinkle areas. The optimization problem, where the objective function to be minimized is the degree of wrinkle and the design variables are geometric parameters of drawbead shape, is solved under several constraints on torsional springback, fracture, sheet thickness and so on. Using the thus-determined drawbeads, we have succeeded in reducing wrinkle and torsional springback markedly, which was confirmed in a Stepped-beam forming experiment.

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© 2012 一般社団法人 日本塑性加工学会
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