臺灣博碩士論文加值系統

摘要
本文應用MARC有限元素軟體分析軸對稱冷鍛(Cold Forging)加工問題。首先本文利用軸對稱擠鍛成形(Extrusion Forging)加工實驗，以擠鍛成形力量以及鍛件擠伸高度之成形結果，驗證MARC分析冷鍛加工問題的可靠性與妥適性。
再以此相同加工問題分析方式，探討自行車使用在外變速系統的重要零組件-飛輪(Free Wheel)之中心結構轂體(Hub)採用鍛造加工的成形結果。並分別探討飛輪轂體多道次鍛造加工過程中，胚料成形填充狀態與鍛造加工成形力量分佈情形以及摩擦效應和胚料尺寸效應對成形性的影響。並預測鍛造模具破壞模式與破壞位置，並且以模具材料Strain-Life實驗曲線預測裂縫成長開始之循環週期。

目錄
頁碼
摘要 Ⅰ
目錄 Ⅱ
圖表說明 Ⅴ
第一章緒論
1-1 前言 1
1-2 文獻回顧 4
1-3 研究動機與目的 11
第二章MARC有限元素軟體介紹
2-1 前言 14
2-2 MARC架構 14
2-2-1 有限元素求解程序 14
2-2-2 界面功能簡介 16
2-3 MARC前處理系統定義 17
2-3-1 材料性質定義模式 17
2-3-2 接觸定義 19
2-3-3 網格重新劃分與自適應技術 19
2-3-4 摩擦效應定義 20
2-4 MARC分析求解技術定義 21
2-4-1 參考座標系統 21
2-4-2 非線性代數方程組疊代求解方法 22
2-4-3 收斂性判斷依據 23
2-4-4 元素技術 25
第三章MARC有限元素軟體應用分析
3-1 前言 26
3-2 實驗驗證 30
3-2-1 擠鍛成形實驗 31
3-2-2 製程參數設定 32
3-3 飛輪轂體有限元素分析 35
3-3-1 飛輪轂體鍛造加工製程介紹 35
3-3-2 製程參數設定 36
第四章結果與討論
4-1 擠鍛成形實驗驗證結果 40
4-1-1 擠鍛成形力量 40
4-1-2 鍛件擠伸高度 41
4-1-3 MARC與Kobayashi矩陣法有限元素解比較 43
4-2 飛輪轂體鍛造應用分析 44
4-2-1 預型鍛件與成型鍛件的成形力量 44
4-2-2 完全鍛造成形分析 46
4-2-3 摩擦條件對預型成形力量之影響 48
4-2-4 胚料尺寸對預型成形性之影響 48
4-2-5 彈性模具效應分析 50
4-2-6 模具破壞分析預測 51
第五章結論與建議
5-1 結論 53
5-2 建議 55
參考文獻 56
附錄

[ 1] G. Maccarini, C. Giardini, and A, Bugini, “Extrusion operations: FEM approach and experimental results”, J. Mater. Process. Technol. 24 (1990) 395-402
[ 2] G. Maccarini, C. Giardini, G. Pellegrini, and A, Bugini, “The influence of die geometry on cold extrusion forging operations”: FEM and experimental results, J. Mater. Process. Technol. 27 (1991) 227-238
[ 3] K.P. Rao, S.M. Doraivelu, and K.Sivaram, “Physical modeling studies using spike forging to verify analytical prediction”, J. Mater. Process. Technol. 28 (1991) 295-306
[ 4] W. Hu and M.S.J. Hashmi, “Study of metal flow in extrusion forging of rectangular billets”, J. Mater. Process. Technol. 43 (1994) 51-59
[ 5] C. Giardini, E. Ceretti, and G. Maccarini, “Formability in extrusion forging : the influence of die geometry and friction conditions”, J. Mater. Process. Technol. 54 (1995) 302-308
[ 6] Chun-Yin Wu and Yuan-Chuan Hsu, “The influence of die shape on the flow deformation of extrusion forging”, J. Mater. Process. Technol. 124 (2002) 67-76
[ 7] O. Maillard, P.Montmitonnet, and P. Lasne, “Simulation of cold forging by a 2D elastoplastic finite element method with automatic remeshing”, J. of Mater. Process. Technol. 34 (1992) 93-100
[ 8] Taylan Altan, and Markus Knoerr, “Application of the 2D finite element method to simulation of cold-forging processes”, J. of Mater. Process. Technol. 35 (1992) 275-302
[ 9] S.I. Oh, W.T. Wu, and J.P. Tang, “Simulations of cold forging processes by the DEFORM system”, J. of Mater. Process. Technol. 35 (1992) 357-370
[10] Kurt Lange, Arndt Hettig, and Markus Knoerr, “Increasing tool life in cold forging through advanced design and tool manufactureing technique”, J. of Mater. Process. Technol. 35 (1992) 495-513
[11] Stig Tjotta, “Finite-element simulations in cold-forging process design”, J. of Mater. Process. Technol. 36 (1992) 79-96
[12] T. Reinikainen, T. Welo, A.S. Korhonen, and S. Kivivuori, “Comparison of two commercial FEM codes in cold extrusion simulation”, J. of Mater. Process. Technol. 42 (1994) 137-146
[13] Markus Knoerr, Kurt Lange, and Taylan Altan, “Fatique failure of cold forging tooling : causes and possible solutions through fatique analysis”, J. of Mater. Process. Technol. 46 (1994) 57-71
[14] Yuichi Nagao, Markus Knoerr, and Taylan Altan, “Improvement of tool life in cold forging of complex automotive parts”, J. of Mater. Process. Technol. 46 (1994) 73-85
[15] Hyunkee Kim, Kevin Sweeney, and Taylan Altan, “Application of computer aided simulation to investigate metal flow in selected forging operations”, J. of Mater. Process. Technol. 46 (1994) 127-154
[16] Ravi Duggirala, Rajiv Shivpuri, Satish Kini, Somnath Ghost, and Subir Roy, “Computer aided approach for design and optimization of cold forging sequences for automotive parts”, J. of Mater. Process. Technol. 46 (1994) 185-198
[17] H. Ou and R.Balendra, “Die-elasticity for precision forging of aerofoil sections using finite element simulation”, J. of Mater. Process. Technol. 76 (1998) 56-61
[18] Olivier Brucelle and Gerard Bernhart, “Methodology for service life of hot forging tools”, J. of Mater. Process. Technol. 87 (1999) 237-246
[19] H.G. Mooi, P.T.G. Koenis, and J. Huetink, “An effective of flow and die deformation calculations of aluminium extrusion”, J. of Mater. Process. Technol. 88 (1999) 67-76
[20] Victor Vazquez, Daniel Hanan, and Taylan Altan, “Tool life in cold forging — an example of design improvement to increase service life”, J. of Mater. Process. Technol. 98 (2000) 90-96
[21] Victor Vazquez and Taylan Altan, “New concepts in die design — physical and computer modeling applications”, J. of Mater. Process. Technol. 98 (2000) 212-223
[22] Jens Groenbaek and Torben Birker, “Innovations in cold forging die design”, J. of Mater. Process. Technol. 98 (2000) 155-161
[23] L. Capan and O.Baran, “Calculation method of the press force in a round shaped closed-die forging based on similarities to indirect extrusion”, J. of Mater. Process. Technol. 102 (2000) 230-233
[24] Dong-Hwan Jang, Tae-Kon Ryon, Dae-Young Yoon, and Beong-Bok Hwang,” Erratum to The process sequence design of power-assisted steering part”, J. of Mater. Process. Technol. 116 (2001) 310-316
[25] B. Falk, U.Engel, and M,Geiger, “Fundamental aspects for the evaluation of the fatigue behavior of cold forging tools”, J. of Mater. Process. Technol. 119 (2001) 158-164
[26] Y.H. Kim, T.K. Ryou, H.J. Choi, and B.B. Hwang, “An analysis of the forging processes for 6061 aluminum-alloy wheels”, J. of Mater. Process. Technol. 123 (2002) 270-276
[27] P.B. Hussain, J.S. Cheon, D.Y. Kwak, S.Y. Kim, and Y.T. Im, “Simulation of clutch-hub forging process using CAMPform ”, J. of Mater. Process. Technol. 123 (2002) 120-132
[28] D.Petrescu, S.C. Savage, and P.D. Hodgson,”Simulation of the fastener manufacturing process”, J. of Mater. Process. Technol. 125-126 (2002) 361-368
[29] J. Landre, A. Petence, P.R. Cetlin, J.M.C. Rodrigues, and P.A.F. Martins, “On the utilisation of ductile fracture criteria in cold forging”, Finite Element in Analysis and Design 39 (2003) 175-186
[30] C. h. LEET and T. Altan, “Influence of stress flow stress and friction upon metal flow in upset forging or rings and cylinders”, Journal of Engineering for Industry, August 1972, 775~782
[31] H. W. Wagener and J. Wolf, “Coefficient of Friction in Cold Extrusion” , J. of Mater. Process. Technol. 44 (1994) 283-291
[32] N. Bay, “The state of the art in cold forging lubricantion” , J. of Mater. Process. Technol. 46 (1994) 19-40
[33] Kocanda, A., “Die steel for warm working — An evaluation of resistance to cyclic loading”, Advanced Technology of Plasticity 1990, Vol. 1, 349-354.
[34] Kurt Lange et al., “Handbook of metal forming”, McGraw-Hill, New York, 1985
[35] C.H. Lee and S. Kobayashi, New solutions to rigid-plastic deformation problems using a matrix method, Trans. ASME, J. Eng. Ind. 95 (1973) 865-873
[36] 黃正義, “有限元素法於冷鍛製程分析之應用”, 碩士論文, 國立台灣大學機械工程研究所, 1993.
[37] 詹建峰, “電腦輔助工程分析於冷鍛模具設計之應用”, 碩士論文, 國立台灣大學機械工程研究所, 1999.
[38] 林文樹編著, “鍛造技術手冊”, 中華民國鍛造協會, 1997.
[39] 傅兆章等編著, “鍛造模具設計手冊”, 金屬工業研究發展中心, 1998.
[40] 詹福賜, 張恭翰編著, “塑性加工之有限單元解析理論與實務, 全華科技圖書股份有限公司, 2001.
[41] “Theory and user information”, MARC Analysis Research Corporation. Volume A. Version K7.
[42] “Mentat Command Reference”, MARC Analysis Research Corporation. Version 3.1.
[43] “MSC.Marc中文基礎教材”, MSC.Software Corporation
[44] “MARC有限元素軟體高階應用訓練課程訓練教材”, 行政院國科會國家高速電腦中心, V.2 2002.