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姓名 江龍(Lung Chiang)  查詢紙本館藏   畢業系所 機械工程學系
論文名稱 加工參數對 A1050P板材經壓延加工後的曲率變化之實驗研究
(Experimental research of working parameter effect curvature behavior of rolling aluminum A1050P)
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摘要(中) 本文主要是利用實驗探討試片經非對稱壓延加工後,其試片的輥輪壓延力、壓延扭矩及彎曲曲率分別於不同縮減率時的變化情形。實驗條件以同徑異周速為主,包含輥輪與壓延試片間的界面摩擦及入口試片厚度不同等。
藉由本實驗所規劃的加工條件,可得知壓延後之試片曲率受縮減率大小、圓周切線速度不同步、界面摩擦及試片初始厚度不同等條件的影響,試圖找出曲率值介於±0.0025(1/mm)內的臨界縮減率(即壓延後的成形試片呈現接近平坦的狀態)產生的條件。藉以達到曲率控制,減少壓延道次,以期達到加工能量需求較低之經濟性製程。
摘要(英) This paper discusses rolling force, rolling torque and curvature ratio with different reduction at asymmetrical rolling. The experimental conditions include different flat thickness and interface between rolling and specimens by lubrication or dry friction.
By experimental conditions can find out specimens that become curvature turn up or turn down behavior with different reduction, different rolling speed, interface friction and different flat thickness after rolling process. Try to find out the critical reduction that curvature between ±0.0025(1/mm), i.e. curvature is near zero. For the purpose of control the curvature and decrease rolling pass times that can reach lower economical production process.
關鍵字(中) ★ 曲率
★ 壓延
★ 縮減率
關鍵字(英) ★ curvature
★ rolling
★ reduction
論文目次 中文摘要 I
英文摘要 II
致謝 III
目錄 IV
圖目錄 VI
表目錄 IX
第一章 緒論 1
1-1 前言 1
1-2 板材非對稱壓延 2
1-3 研究動機 3
第二章 實驗基礎 4
2-1 壓延種類 4
2-2 文獻回顧 5
2-2-1 實驗研究方面 5
2-2-2 理論解析方面 7
第三章 實驗設備與方法 10
3-1 實驗設備 10
3-1-1 壓延機 10
3-1-2 資料擷取系統 10
3-2 實驗方法 11
3-2-1 試片準備 11
3-2-2 實驗條件 12
3-2-3 編號的表示意義 12
3-2-4 潤滑條件 13
3-2-5 輥輪與工作平台調整 13
3-2-6 壓延實驗步驟 15
3-3 成形板材之曲率量測 16
3-3-1 曲率計之測定原理 16
3-3-2 曲率量測方法之探討 17
3-3-3 曲率計之校正 18
3-4 拉伸試驗 18
3-5 環壓試驗 20
3-6 Forward Slip 22
第四章 結果與討論 25
4-1 拉伸試驗 25
4-2 環壓試驗 26
4-3 Forward Slip 27
4-4 同徑壓延實驗 27
4-4-1 壓延力及壓延扭矩之比較 30
4-4-2 周速比對壓延試片曲率的效應 31
4-4-3 試片厚度對壓延試片彎曲曲率的影響 36
4-4-4 界面摩擦條件對試片彎曲曲率的影響 40
第五章 結論 43
參考文獻 46
附錄 79
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[2] E. Orowan, "The Calculation of Roll Pressure in Hot and Cold Flat Rolling", Proceedings of the Institution of Mechanical Engineers, 150 (1943) 140-167.
[3] D. R. Bland, and H. Ford, "The Calculation of Roll Force and Torque in Cold Strip Rolling with Tensions," Proc. Instn. Mech. Engrs., 159 (1948) 144-153.
[4] H. Ford, F. Ellis, and D. R. Bland, "Cold Rolling with Strip Tension Part I. A New Approximate Method of Calculation and a Comparison with Other Method", Jounal of the Iron and Steel Institute, (May 1951) 57-72.
[5] R. B. Sims, "The Calculation of Roll Force and Torque in Hot Rolling Mills", Proc. Instn. Mech. Engrs., 168 (1954) 191-200
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[8] D. Rusia, "Review and Evaluation of Different Methods for Force and Torque Calculations in the Strip Rolling Process", Journal of the Material Shaping Technology, 9 (1991) 117-125.
[9] W. Johnson and G. Needham, "An Experimental Study of Asymmetrical Rolling", Applied Mechanics Convention, Cambridge, Instn. Mech. Engrs., 180 (April 1966) 270-281.
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[11] I. F. Collins and P. Dewhurst, "A Slipline Field Analysis of Asymmetrical Hot Rolling", Int. J. Mech. Sci., 17 (1975) 643-651.
[12] Janusz Popiech, "A note on the influence of some factors affecting curvature in the flat rolling of strip", Journal of Mechanical Working Technology. 15 (1987) 69-80.
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[20] F.Farhat-Nia, M.Salimi, M.R.Movahhedy, "Elasto-plastic finite element simulation of asymmetrical plate rolling using an ALE approach", Journal Materials Processing Technology, 177 (2006) 525-529,
[21] 孟繼洛, "機械材料", 臺北市:曉園出版社, (1990) 430-431。
[22] Designation:E8M, Standard Test Methods for Tension Testing of Metallic Materials [Metric], pp. 85.
[23] W. F. Hosford and M. C. Caddell, "Metal forming Mechanics and Metallurgy", Prentice-Hall International Inc., (1993) 55-60.
[24] A. T. Male and M. G. Cockcroft, "A Method for the Determination of the Coefficient of Friction of Metals under Conditions of Bulk Plastic Deformation", Journal of the Institute of Metals, 93 (1964-65) 38-46.
[25] J. G. Lenard, "Friction and Forward Slip in Cold Strip Rolling", Tribology Transactions, 35 (1992) 423-428.
指導教授 葉維磬(Wei-Ching Yeh) 審核日期 2008-7-23
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