書誌事項
- タイトル別名
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- Convenient Prediction of Load and Flatness in Cold Upsetting of High-strength Steel
- ―Load Reduction and High Flatness Accuracy Using Convex Tools―
- ―凸面工具による荷重低減と高平面精度化―
抄録
<p>Recently, the simple upsetting of high-strength steel has often been performed without heating and lubrication at a high compression ratio to improve the environment by sustainable manufacture and a productive automobile. Under these severe conditions, the extremely high pressure causes the tool to be elastically concaved. The shaped tool induces an increase in upsetting load and a decrease in the flatness of upset products. In this study, the convex tool with a small slope is investigated experimentally and analyzed by finite element method (FEM) to reduce the overload and improve the flatness. The obtained load (Fc = C1CAY = C1Fs) indicates a second correction factor C1 for modifying the load Fs which is estimated by a conventional slab method as Fs = CAY, where the coefficient C is determined by friction coefficient and product height diameter ratio, and A and Y are the cross-sectional area and flow stress of the work, respectively. Additionally, the modified flatness αt = C2 (δ0 - δR ) of the work is estimated by a combination of the elastic theory and FEM analysis, where the correction coefficient C2 is determined by FEM analysis and δ0 - δR is the elastic difference between the thickness δ0 at the center and the thickness δR at the outer diameter of the work.</p>
収録刊行物
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- 塑性と加工
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塑性と加工 65 (759), 45-51, 2024-04-25
一般社団法人 日本塑性加工学会
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キーワード
詳細情報 詳細情報について
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- CRID
- 1390862623772222976
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- ISSN
- 18820166
- 00381586
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- Crossref
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- 抄録ライセンスフラグ
- 使用不可