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研究生： 陳俊賢
Jun-Xian Chen
論文名稱： 超音波振動補助引伸加工之有限元素分析
The finite-element analysis of deep drawing assisted with ultrasonic vibration
指導教授： 葉維磬
Wei-Ching Yeh
口試委員:
學位類別： 碩士
Master
系所名稱： 工學院 - 機械工程學系
Department of Mechanical Engineering
畢業學年度： 98
語文別： 中文
論文頁數： 62
中文關鍵詞： 超音波振動 、引伸加工 、有限元素
外文關鍵詞： ultrasonic vibration, deep drawing, finite-element
相關次數： 點閱：8  下載：0 
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    • 本文應用 MARC 有限元素套裝軟體分析超音波輔助引伸加工問題。為瞭解 MARC 應用於引伸問題的預測性及妥適性，本文首先利用引伸的實驗結果比較模擬的準確性，並分別探討成品厚度、成形所需之沖頭負載及材料成形性的影響。利用母模加載超音波振動來輔助引伸成形，其振動方向分別為平行與垂直沖頭運動方向，進而探討超音波振動輔助引伸成形之影響。

    The paper employs MARC software to analyze the behavior of deep drawing assisted by ultrasonic vibration. To understand the abilities of MARC in the prediction and suitability of the behavior in deep drawing, compared with experimental results are applied firstly. Thickness, drawing load and material behavior are separately discussed. Upper die with ultrasonic vibration which direction is parallel and vertical to the moving stroke assists in deep drawing. Finally, the paper investigates the influence of deep drawing with ultrasonic vibration.

    摘要 i Abstract ii 致謝 iii 目錄 iv 圖目錄 vii 第一章 緒論 1 1.1 前言 1 1.2 研究目的與動機 2 1.3 文獻回顧 3 第二章 基本理論 8 2.1 超音波振動降低摩擦力之機制 8 2.2　Update Lagrangian Formulation(ULF)理論 10 2.3　MARC接觸問題的處理 11 2.3.1 接觸之定義 11 2.3.2 接觸之處理程序 12 2.4 摩擦效應之處理 13 2.5 求解非線性代數方程式的方法 14 第三章 MARC 有限元素軟體介紹 23 3.1 基本假設 23 3.2 MARC 之架構與各部分功能的介紹 24 3.3 MARC 應用於超音波輔助引伸問題的設定與操作程序 25 3.3.1 前處理器 25 3.3.2 分析器 26 3.3.3 後處理器 27 3.4 收斂檢查 27 第四章 結果與討論 32 4.1 實驗驗證 32 4.2 超音波振動輔助引伸分析 33 4.3 超音波振動輔助對於引伸成形力之影響 33 4.3.1 軸向振動(axial ultrasonic-vibration)之影響 34 4.3.2 徑向振動(radial ultrasonic-vibration)之影響 35 4.4 超音波輔助對於胚料厚度之影響(料片直徑20mm) 36 4.5 超音波輔助對於胚料厚度之影響(料片直徑23mm) 37 4.5.1 軸向振動(axial ultrasonic-vibration)之影響 38 4.5.2 徑向振動(axial ultrasonic-vibration)之影響 39 4.6 沖頭速度與臨界速度之相對關係 39 4.7 超音波輔助對於引伸成形性之影響 41 第五章 結論與未來研究方向 43 5.1 結論 43 5.2 建議 44 參考文獻 45

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