矩形杯引伸成形料片外形設計之有限元素分析

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林宏杰(Hong-Jie Lin) 查詢紙本館藏

畢業系所

機械工程學系

論文名稱

矩形杯引伸成形料片外形設計之有限元素分析
(The blank shape designed of the rectangular cups in deep drawing by FEM method.)

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摘要(中)

應用MARC有限元素軟體，並結合Toh與Kobayashi[1]之引伸成形料片外形設計法做為本文分析矩形杯引伸成型料片設計的問題。本文以矩形杯之長寬邊比值為3、2.5、2、1.5及1等五組不同外形的引伸件為例，並建立各組在引伸成形後的理想成形外形與形狀誤差的計算方式。在形狀誤差符合國際公差標準IT13~IT16的範圍內探討設計過程中所對應的形狀誤差及其達到的公差等級，並探討不同的初始料片外形與設計尺寸對於設計次數與成品品質的影響。為瞭解MARC應用於三維引伸加工問題的預測性及妥適性，本文利用Choi與Huh[7] 及Toh與Kobayashi[1]的實驗結果對MARC分析做驗證，並探討料片外形經設計候對於成形性之影響。

摘要(英)

In this paper, A numerical analysis combined finite element code “MARC’ and Toh with Kobayashi’s blank designed method to analyze the blank design of the deep drawing of rectangular cups. It used the ratio of the length and width side is 3, 2.5, 2, 1.5, 1of the rectangular cups. It established ideal shapes of the drawing cups and the count of the shape error. As for the shape error conform to IT13~IT16 of the Internationable Toleranzeinheit discuss various of the initial blank shapes and designed shapes effect design times and the quality of the products. In order to verify the validity of the 3-D deep drawing analysis by MARC, the paper applied Choi with Huh’s and Toh with Kobayashi’s experimental results to verify the validity of the analysis by MARC and discuss the formability of the drawing cups with the designed blanks.

關鍵字(中)

★ 引伸成形

關鍵字(英)

★ deep drawing

論文目次

摘要 Ⅰ
誌謝 Ⅲ
目錄 Ⅳ
圖表說明 Ⅶ
符號索引 ⅩⅢ
第一章緒論
1-1 前言 1
1-2 文獻回顧 2
1-3 研究動機與目的 4
第二章基本理論
2-1 Update Lagrangian Formulation(ULF)理論 7
2-2 有限元素分析基本概念 8
2-3 MARC接觸問題的處理 13
2-3-1 接觸之定義 13
2-3-2 接觸面摩擦效應之處理 14
2-3-3 接觸之處理程序 15
2-4 MARC分析求解技術分析 17
2-4-1 參考座標系統 17
2-4-2 非線性代數方程組疊代求解方法 18
2-4-3 收斂性判斷依據(Convergence Testing) 19
2-4-4 元素技術 20
第三章有限元素模擬及設計方法
3-1 基本假設 22
3-2 料片機械性質 23
3-3 初始料片幾何尺寸 23
3-4 加工模組幾何尺寸 24
3-5 有限元素分析之加工參數 24
3-6 國際公差標準(Internationable Toleranzeinheit) 24
3-7 有限元素分析之參數控制 25
3-8 MARC之架構與各部份的功能介紹 25
3-9 MARC應用於3-D引伸加工問題的設定與操作程序 26
3-9-1 前處理器 26
3-9-2 分析器 27
3-9-3 後處理器 28
3-10 設計方法 28
第四章結果與討論
4-1 3-D矩形杯與方杯引伸成形實驗驗證結果 30
4-2 料片設計分析 32
4-2-1 料片引伸誤差分析 32
4-2-2 設計尺寸及初始料片外形對設計的影響 36
4-2-3 厚度應變分析 38
4-2-4 等效塑性應變分析 39
4-2-5 衝頭負載分析 39
第五章結論與建議
5-1 結論 41
5-2 建議 42
參考文獻 43

參考文獻

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指導教授

葉維磬(Wei-Ching Yeh)

審核日期

2007-7-20

推文