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研究生:翁釋龍
研究生(外文):Shih-Long Wong
論文名稱:複合包芯材之靜水壓擠製分析
論文名稱(外文):Analysis of Hydrostatic Extrusion of Composite Clad Rods
指導教授:徐瑞坤
指導教授(外文):Ray-Quen Hsu
學位類別:碩士
校院名稱:國立交通大學
系所名稱:機械工程系
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:1999
畢業學年度:87
語文別:中文
論文頁數:75
中文關鍵詞:靜水壓擠製複合包芯材流體擠製壓力
外文關鍵詞:hydrostatic extrusioncomposite clad rodsfluidextrusion pressure
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靜水壓擠製主要特徵在於利用流體將壓力均勻的施加於擠製錠的四周,而非直接利用擠桿與擠製胚料接觸施加壓力。所以,除了金屬變形部份的分析外,流體區域的能量分析更是重要。
本研究有別於以往的研究,以流體動力學的觀點,採用牛頓第二運動定律與管流模式,來分析流體區域的能量消耗,並配合上界法分析複合包芯材變形消耗的能量,建立一靜水壓擠製之解析模式。並且以此解析模式來模擬各個加工條件對靜水壓擠製過程的影響,最後以實驗來印證本研究所提之解析模式的可靠度。
One of the main characteristics of hydrostatic extrusion is that the billet is completely immersed in pressurized fluid. The energy consumed by the pressurized fluid is in no way less important than those consumed by the billet. The aim of this thesis is to propose an analytic model for hydrostatic extrusion process which will take into account the energy consumed by both the pressure transmitting fluid and the billet under going deformation.
In this study, Newton’s Second Law and pipe flow model were adopted for the analysis of the fluid and pressure, meanwhile, upper bound theorem was used for the analysis of the deformation of composite rods or wire. The effects of processing parameters on the deformation behavior of the composite clad rod in hydrostatic extrusion process was discussed. Finally an experiment of the hydrostatic extrusion of composite clad rod was conducted, and its results were found very close with the results obtained from the analysis.
中文摘要 I
英文摘要 II
誌謝 III
目錄 IV
表目錄 VII
圖目錄 VIII
符號說明 XI
第一章緒論 1
1.1前言 1
1.2文獻回顧 2
1.2.1實驗研究方面 2
1.2.2理論解析方面 3
1.3研究動機 4
1.4影響靜水壓擠製的因素 5
第二章靜水壓擠製之解析 7
2.1靜水壓擠製之模型 7
2.2流體區之解析模式 7
2.2.1管流模式 7
2.2.2流體區域之基本假設 8
2.2.3流體區域消耗能量 10
2.2.3.1流場能量方程式 10
2.2.3.2流體入口區與流體作用區的能量損失 14
2.2.3.3流體總消耗能量 22
2.3擠製錠之變形能量分析 22
2.3.1運動可容速度場的構成 24
2.3.2各項功率之計算 25
2.4靜水壓擠製總消耗能量與擠製壓力的計算29
2.4.1靜水壓擠製總消耗能量 29
2.4.2擠製壓力 30
2.5流體與擠製錠變形的關係 30
第三章解析結果與分析 39
3.1流體密度與黏度的影響 39
3.2半模角的影響 40
3.3擠製比的影響 41
3.4降伏強度比的影響 41
3.5其他結果分析 43
第四章靜水壓擠製實驗 55
4.1前言 55
4.2實驗裝置 55
4.3實驗材料之組合及實驗條件 56
4.4實驗結果與分析 56
4.4.1擠製壓力對位移的結果 56
4.4.2擠製品之外觀及形狀、尺寸之變化56
4.4.3實驗結果與理論解析結果之比較 57
第五章結論與未來展望 69
5.1結論 69
5.2未來展望 70
參考文獻 72
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and Its Application in the Analysis of Plasto-Hydrodynamic
Inlet Zones”, J. Lubrication Technology, Trans. ASME , Vol 95,
No 4, pp. 572~577. , 1974
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Zone of Hydrodynamically Lubricated Continuous Deformation
Processes ”, J. Lubrication Technology , Trans. ASME , Vol 95,
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of Hydrostatic Extrusion ”, J. Lubrication Technology , Trans.
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