非對稱壓延加工參數對板材彎曲行為之實驗研究

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研究生：	魏上超 Shang-Chao Wei
論文名稱：	非對稱壓延加工參數對板材彎曲行為之實驗研究 Experimental research of asymmetrical rolling with processing parameters of aluminum strip curvature behavior
指導教授：	王國雄 Guo-Xiong Wang
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：	113
中文關鍵詞：	縮減率、壓延曲率、非對稱壓延
外文關鍵詞：	rolling curvature, critical reduction, asymmetrical rolling
相關次數：	點閱：19 下載：0
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本文以試片厚度2.9mm及5mm的A1050鋁片來進行非對稱壓延的加工，是以實驗的方法來探討不同加工因子，包含入口試片不同厚度、不同輥輪之輥徑、上下輥輪切線速度比值以及界面之潤滑條件等，對試片的輥輪壓延力、壓延扭矩及彎曲曲率分別於不同縮減率時的變化情形。實驗條件以異徑及同徑異周速為主，並找出曲率為零之臨界縮減率。
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、上下輥輪切線速度比值不同、不同輥輪之輥徑、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。

This paper observe aluminum flat A1050 various of curvature ratio at asymmetrical rolling with different specimens thickness (2mm and 2.9mm), and mainly use experiment to discuss with processing different parameters, include different flat thickness, different work rolling ,and different rolling speed, interface between rolling and specimens by lubrication or dry friction and etc., then discuss rolling force, rolling torque and curvature ratio with different reduction at asymmetrical rolling.
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.

摘  要	                                               I
ABSTRACT	                                               II
致 謝	                                               III
目  錄	                                               IV
圖目錄                                                  VII
表目錄                                                  IX
第一章	緒 論	                                      1
1-1 前言	                                               1
1-2 非對稱壓延及應用製造簡介	                    2
1-3文獻回顧	                                      3
1-3-1實驗研究方面	                                      3
1-3-2 理論解析方面	                                      6
1-4 研究動機與目的	                                      8
第二章 理論基礎	                                      10
2-1 壓延種類	                                      10
2-1-1對稱壓延	                                      10
2-1-2 非對稱壓延	                                      10
2-2 壓延間之幾何關係	                             12
2-2-1 壓延速度與中性點	                             12
2-2-2 壓延量	                                      13
第三章 實驗設備與方法	                             14
3-1 實驗設備	                                      14
3-1-1  冷間壓延機	                                      14
3-1-2  資料擷取系統	                             15
3-2  實驗方法	                                      16
3-2-1  試片準備	                                      16
3-2-2  實驗條件	                                      16
3-2-3  編號表示意義	                             18
3-2-4  輥輪與試片之界面潤滑條件	                    18
3-2-5  輥輪及工作平台之調整	                             18
3-2-6  輥輪之置換	                                      20
3-2-7  壓延實驗步驟	                             20
3-3  試片成形曲率之量測	                             21
3-3-1  曲率計之測定原理	                             21
3-3-2  曲率量測方法之探討	                             22
3-3-3  曲率計之校正	                             22
3-4  單軸拉伸試驗	                                      23
3-5  FORWARD SLIP  實驗	                             24
第四章 結果與討論	                                      26
4-1 拉伸實驗	                                      26
4-2 FORWARD SLIP	                                      27
4-3 壓延實驗	                                      28
4-3-1 平均輥輪直徑對壓延力及壓延扭矩之比較	           30
4-3-2 周速比對成形試片彎曲曲率之影響	                    32
4-3-3 試片厚度對異徑異周速成形試片彎曲曲率之影響	  36
4-3-4 試片厚度對同徑異周速成形試片彎曲曲率之影響	  39
4-3-5 界面摩擦條件對異徑異周速成形試片彎曲曲率之影響	  40
4-3-6 界面摩擦條件對同徑異周速成形試片彎曲曲率之影響	  42
4-3-7 平均輥輪直徑對成形試片彎曲曲率之影響	           44
第五章 結論	                                      50
參考文獻	                                               53
附   錄A	                                               93
附   錄B	                                               100
附   錄C	                                               101

                                

[1] R. Reich, N. Panseri, and J. Bohaychick, "The Effect of Lubricant Starvation in the Cold Rolling of Aluminum Metal When Using an Oil-in-Water Emulsion," Journal of the Society of Tribologists Lubrication Engineering, vol. 57, p.15-18, 2001.
[2] P. Dewhurst, I.F. Collins and W. Johnson, "A theoretical and experimental investigation into asymmetrical hot rolling ," International Journal of Mechanical Sciences, vol.16, p.389-397, 1974.
[3] P. Dewhurst and I.F. Collins, "A slipline field analysis of asymmetrical hot rolling ," International Journal of Mechanical Sciences, vol.17, p. 643-651, 1975.
[4] J.M. Alexander, "On the Theory of Rolling," Proceedings of the Royal Socity of London. Series A., Vol. 326, p.535-563, 1972.
[5] D. Rusia, "Improvements to Alexander''s Computer Model for Force and Torque Calculations in Strip Rolling Process," Journal of the Material Shaping Technology, Vol. 8, p.167-177, 1990.
[6] D. Rusia, "Review and Evaluation of Different Methods for Force and Torque Calculations in the Strip Rolling Process," Journal of the Material Shaping Technology, Vol. 9, p.117-125, 1991.
[7] M. Salimia and F. Sassani, "Modified slab analysis of asymmetrical plate rolling," International Journal of Mechanical Sciences, vol.44, p.1999- 2023, 2002.
[8] M. Salimi and M. Kadkhodaei, "Slab analysis of asymmetrical sheet rolling," International Journal of Mechanical Sciences, vol.150, p.215-222, 2004.
[9] W. Johnson and G. Needham, "An Experimental Study of Asymmetrical Rolling, " Applied Mechanics Convention, Cambridge, Instn. Mech. Engrs. Vol. 180, p.270-281, April, 1966.
[10] W. Johnson and G. Needham, "Further Experiments in Asymmetrical Rolling," Int. J. Mech. Sci.,Vol. 31, p.443-455, 1966.
[11] D. Pan and D. H. Sansome, "An Experimental Study of the Effect of Roll Speed Mismatch on the Rolling Load during the Cold Rolling of the Thin strip," Journal of Mechanical Working Technology, Vol. 6, p.361-377, 1982.
[12] H. Yamamoto, Y. Uebori, and K. Nakajima, "Effect of Peripheral Roll Speed Ratio and Friction Coefficients on Asymmertic Rolling Characteristics," Journal of JSTP, vol. 25, no. 286, p.987-993, 1984.
[13] J. Pospiech, "A Note on the Influence of Some Factors Affecting Curvature in the Flat Rolling of strip," Journal of Mechanical Working Technology, Vol. 15, p.69-80, 1987.
[14] K. Narita et al. , "The Characteristics of Curvature in Asymmetrical Cold Rolling," Proc. s-63 Sp. Conf. of JSTP, p.241-244, 1988.
[15] J. G. Lenard, "The Effect of the Roll Roughness on the Rolling Parameters during Cold Rolling of an Aluminum Alloy," Journal of Materials Processing Technology, vol. 152, p.144-153, 2004.
[16] R.M. McMeeking and J.R. Rice, "Finite-element formulations for problems of large elastic-plastic deformation," International Journal of Solids and Structures, vol.11, p.601-616, 1975.
[17] G.J. Li and S. Kobayashi, "Rigid plastic finite element analysis of plane strain rolling," Journal of Engineering for Industry, vol.104, p.55-64, 1982.
[18] A. Chandra and S. Mukherjee, "A finite element analysis of metal-forming problems with an elastic-viscoplastic material model," International Journal for Numerical Methods in Engineering, vol.20, p.1613-1628, 1984.
[19] R. Shivpuri, P. C. Chou and C. W. Lau, "Finite Element Investigation of Curling in Non-symmetrical Rolling of Flat Stock," International Journal of Mechanical Sciences, Vol. 30, p.625-635, 1988.
[20] Makoto YOSHll, Kazuo OHMORI, Tsuneo SETO, HideYuki NIKAIDO, Hiroshi NISHIZAK and Masatoshi INOU, "Analysis of Warping Phenomenon In Plate Rolling," ISIJ International, vol. 31, no. 9, p.973-978, 1991.
[21] J.S. Lu, O.K. Harrer, W. Schwenzfeier and F.D. Fischer, "Analysis of the bending of the rolling material in asymmetrical sheet rolling, " International Journal of Mechanical Sciences, vol. 42, p.49-61, 2000.
[22] S.A.A. Akbari Mousavi, S.M. Ebrahimi and R. Madoliat, "Three dimensional numerical analyses of asymmetric rolling," Journal of Materials Processing Technology, vol. 187-188, p.725-729, 2007.
[23] M. Philipp, W. Schwenzfeier, F.D. Fischer, R. Wodlinger and C. Fisher, "Front end bending in plate rolling inﬂuenced by circumferential speed mismatch and geometry," Journal of Materials Processing Technology, vol. 184, p.224-232, 2007.
[24] E.B. Li, A.K. Tieu and W.Y.D. Yuen, "Forward slip measurements in cold rolling by laser Doppler velocimetry：uncertainty analysis and accuracy improvement," Journal of Materials Processing Technology, vol. 133, p.348-352, 2003.
[25] 金重勳, "工程試片," 復文書局, p.338-370, 1996.
[26] 張東堯, "異徑成形試片彎曲曲率之實驗研究,"國立中央大學機械工程研究所碩士論文, 2007.
[27] 陳遠欣, " A1050P試片經非對稱壓延之彎曲行為的實驗研究,"國立中央大學機械工程研究所碩士論文, 2008.
[28] N. Bay, et al., "Cross Shear Roll Bonding," J. Mater. Process. Technol., vol. 45, p.1-6, 1994.
[29] Vladimir and B. Ginzburg, " Steel-Rolling Technology," New York and Basel, 1989.
[30] 孟繼洛, "機械試片," 臺北市:曉園出版社, p.430-431, 1990.
[31] Designation：E8M-91, Standard Test Methods for Tension Testing of Metallic Materials [Metric], p.150-168.
[32] W.F. Hosford and M.C. Caddel, "Metal forming Mechanics and Metallurgy," Prentice-Hall International, Inc. ,p.55-60, 1993.
[33] W.L. Roberts, "Cold Rolling of Steel", Dekker and Co., New York, 1987.
[34] J.G. Lenard, "Friction and Forward Slip in Cold Strip Rolling", Tribology Transactions, vol. 35, p. 423-428, 1992.

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