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題名 | 冷鍛頭實驗與電腦模擬分析=EXperiment and Computer Simulation of Cold Heading |
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作者 | 黃宗立; | 書刊名 | 臺北科技大學學報 |
卷期 | 35:2 2002.09[民91.09] |
頁次 | 頁11-19 |
分類號 | 472.1 |
關鍵詞 | 冷鍛頭; 有限元素分析; 摩擦係數; Cold heading; Finite element analysis; Friction coefficient; |
語文 | 中文(Chinese) |
中文摘要 | 冷鍛頭是一種普遍但重要的金屬加工製程,主要利用模具固定金屬棒材的下半部,而同時利用沖頭將其頭部鍛粗成所需的形狀,其最終產品主要應用於各種結構件之接合。本文採用6061-T6鋁合金及純銅為加工材,以實驗及有限元素分析商業軟體(ABAQUS)做冷鍛頭問題的模擬分析。文中詳細探討製程參數(材料性質、摩擦係數、工件內圓角半徑、熱處理)對加工負荷、工件變形及工件內部應力應變分佈的效應。由有限元素分析所得的附和-位移曲線趨勢與實驗數據相似,其預測變形後之側向膨脹也與實驗觀測結果非常相近。如所預期,模穴中的材料並不會影響變形區之材料流動,摩擦係數及工件內圓角半徑對冷鍛頭製程則有顯著的效果。 |
英文摘要 | Cold heading is a very common but important metalworking operation. It forms the upper part of a metal bar into a desired head shape through upsetting, while holding the lower part of the bar in the shank of die. Its final product is mainly used to hold structural parts together. Using 6061-T6 aluminum and pure copper as the working materials, this study simulates and analyzes problems related to cold heading by experiment and a commercial FEM code, ABAQUS. The effects of process parameters (Material property, friction, radius of fillet and heat treatment) on loading, deformation, and the distribution of stress and plastic strain in the deformed configuration are discussed in detail. The trend of the computer load-displacement curve is similar to that out of experimental data. The predicted bulge phenomenon in deformed configuration is also in excellent agreement with that observed from experiment. As expected, the material in the shank does not influence the material flow in the deforming region. Both friction and the radius of fillet do have significant effects on cold heading. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。