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研究生： 陳建宏
Chien-Hong Chen
論文名稱： 金屬板材平橢圓杯引伸成形製程之分析
An Analysis of Flat Ellipse Cup Drawing Process of Sheet Metal
指導教授： 黃佑民
You-Min Huang
口試委員: 向四海
Su-Hai Hsiang
陳聰嘉
Tsung-Chia Chen
學位類別： 碩士
Master
系所名稱： 工程學院 - 機械工程系
Department of Mechanical Engineering
論文出版年： 2013
畢業學年度： 101
語文別： 中文
論文頁數： 80
中文關鍵詞： 有限元素分析 、平橢圓杯引伸 、成形極限
外文關鍵詞： The Forming Limit, Finite Element Analysis, Flat Ellipse Cup Drawing
相關次數： 點閱：326  下載：4 
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  •  上一筆

    • 本研究係採用有限元素之套裝模擬軟體ABAQUS針對平橢圓杯引伸成形製程進行分析並自行設計製作模具，進行模擬驗證，以達製程分析之目的。
    本研究以材料拉伸試驗所得之應力應變曲線輸入有限元素套裝軟體ABAQUS裡，並且依此拉伸試驗所得之試片破斷面厚度作為數值分析之破裂判斷基準，探討平橢圓杯引伸成形製程之沖頭負荷與衝程之關係、工件厚度變化情形、應力分佈、應變分佈、變形履歷、平橢圓杯引伸之成形極限以及不同沖模圓角半徑對於成形極限與最薄厚度區域的關係。

    This study used FEM simulation software ABAQUS as well as designed a drawing mold to analyze the process of making a flat ellipse cup.
    The stress and strain graph obtained from the tensile test was used during simulation. The fractured thickness of a specimen was adopted as the fracture criterion of forming limit in simulation to determine if the part was cracked or not.
    The numerical simulation results include relationship between punch load and punch stroke, distribution of the thickness, distribution of the equivalent stress, distribution of the equivalent strain, deformation history and the forming limit, the relationship between die radius and the minimum thickness region etc. in flat ellipse cup drawing process.

    摘要 I Abstract II 誌謝 III 目錄 IV 圖表索引 VII 第一章 緒論 1 1.1 前言 1 1.2 研究動機與目的 2 1.3 文獻回顧 3 1.4 論文之構成 8 第二章 材料性質與拉伸試驗 10 2.1 拉伸試驗 10 2.1.1 試驗目的 10 2.1.2 真應力與真應變 12 2.1.3 加工硬化指數(work hardening exponent, n) 12 2.2 材料拉伸試驗結果 13 第三章 有限元素法 16 3.1 有限元素分析系統 17 3.2 ABAQUS軟體之介紹 19 3.3 有限元素模型之基本假設 21 3.4 建立分析模型 21 3.4.1 平橢圓杯引伸模擬模式 21 3.4.2 材料及元素性質給定 25 3.4.3 建立接觸與邊界條件 25 3.5 網格收歛性測試 27 第四章 板材成形之模擬與實驗結果比較 30 4.1 板材成形實驗設備與實驗模具 30 4.2 成形原理與實驗步驟 31 4.3 數值模擬與實驗結果之比較 33 4.3.1 平橢圓杯引伸成形之方向定義 33 4.3.2 平橢圓杯引伸成形之沖頭負荷之比較 33 4.3.3 工件等價應力分佈 34 4.3.4 工件等價應變分佈 35 4.3.5 工件厚度變化之比較 36 4.3.6 初始料片直徑與平橢圓杯杯高之關係 37 4.3.7 平橢圓杯引伸之成形歷程 38 4.4 平橢圓杯引伸之成形極限分析 38 4.5 不同沖模圓角半徑之影響 41 第五章 結論 73 5.1 結論 73 5.2 未來展望 75 參考文獻 77

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