本研究之目的為探討由不同金屬之單芯材與被覆材組成之軸對稱複合材靜水壓擠製時，各加工因子對擠製品變形形態的影響，並討論擠製壓力與各加工因子之關係。
在複合材靜水壓擠製之有限元素模擬方面，本論文提出一芯材破斷的判別式。芯材之破壞指數的影響參數有：擠製比(R)、半模角(α°)、界面摩擦因子(mi)、材料強度比等。利用有限元素模擬得到各式參數對破壞指數分佈之影響，以建立一資料庫，可用於芯材破壞之預防。
本論文已設計並製造一工作壓力可達7000kgf/cm2之靜水壓背壓設備。在實驗方面，執行各種不同芯材半徑比之銅鋁複合材擠製實驗。發現了均勻變形之擠製總是發生在內軟外硬之組合下，而芯材受拉伸應力產生破壞之情形通常發生於內硬外軟之組合。

The object of this study is to explore the deformation pattern of axisymmetric clad materials composed of the single-core and the sleeve during hydrostatic extrusion, and discuss the relations between processing condition factors and extrusion pressure in hydrostatic extrusion of axisymmetric clad materials.
In the FEM simulation of composite materials during hydrostatic extrusion, this paper describes a technique that can be used for predicting whether core bursting of composite materials occurs or not. The effect of several extrusion parameters on the damage value of the core is examined: extrusion ratio(R), die semicone angle(α°), bonding friction factor(mi), material strength ratio. By performing FEM simulations and discussing the effect of parameters on distribution of damage value obtained, it is possible to establish a data base for prevention of fracture of the core.
The paper has designed and constructed an experimental receiver pressure of hydrostatic apparatus with a maximum working pressure of 7000 kgf/cm2. In experiment, extrusion of Cu-Al composite rods with different of core radius ratio was carried out. It has been found that uniform deformation always occurs under the combination of hard sleeve and soft core and the core layer usually fails due to the tension under the combination of hard core and soft sleeve.

中文摘要 I
英文摘要 II
目錄 III
圖表索引 VI
第一章 緒論 1
1-1 前言 1
1-2 靜水壓設備歷史回顧 1
1-3 複合材擠製歷史回顧 6
1-4 複合材擠製加工之缺陷 7
1-5 研究目的 7
1-6 論文架構 8
第二章 靜水壓複合材擠製之有限單元模擬 12
2-1 deform簡介 12
2-1-1 DEFORM擠製模擬解析系統 12
2-1-2使用DEFORM模擬擠製之優點 12
2-2有限單元分析理論基礎 13
2-2-1力學分析 13
2-2-2邊界條件處理 13
2-3有限單元模擬之條件規劃 14
2-4材料破壞判斷準則 16
2-4-1芯材破壞 16
2-4-2預估頸縮破壞的方法 17
2-5有限之模擬結果與討論 21
2-5-1擠製比之影響 23
2-5-2半模角之影響 26
2-5-3界面摩擦因子之影響 28
2-5-4入口芯材半徑比之影響 32
2-5-5材料強度比之影響 34
第三章 背壓係統之測試與改良 37
3-1 簡介 37
3-2實驗週邊設備及量測儀器 37
3-3壓力媒介及潤滑劑 39
3-3-1壓力媒介 39
3-3-2潤滑劑 39
3-4設備之改良 40
3-4-1栓座之改良 40
3-4-2背壓主體之改良 40
3-4-3模具之改良 42
3-4-4螺栓之改良 42
第四章 解析結果與實驗值之比較 44
4-1簡介 44
4-2複合材之靜水壓擠製加工 44
4-2-1複合材靜水壓擠製實驗之材料性質 44
4-2-2胚錠製造 48
4-2-3加工條件 49
4-2-4擠桿進程速度 49
4-3實驗結果與討論 50
4-3-1開端胚錠之靜水壓擠製實驗狀態 50
4-3-2閉端胚錠之靜水壓擠製實驗狀態 51
4-3-3內軟外硬胚錠之靜水壓擠製實驗狀態 55
4-4有限單元模擬與實驗值之比較 58
第五章 結論 59
5-1研究成果之概要 59
5-2未完成之之課題 59
附錄 背壓系統之設計與製作 61
附錄A背壓系統之設計與應力分析 61
A-1 背壓主體 61
A-2 增壓裝置 66
A-3 背壓筒 69
A-4 栓座估算 74
附錄B 推桿設計與分析 76
B -1 液壓油壓縮性 76
B -2 推桿尺寸的計算 78
B -3 推桿退後量之估算 82
附錄C 高壓密封之設計 84
C -1 螺紋的預緊力 85
C -2 緊密螺栓連接螺栓的強度估算 87
C -3 螺栓之設計和分析 87
附錄D增壓裝置之油路設計 90
D-1液壓迴路設計 90
D-2電控迴路之設計 93
參考文獻 96

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