臺灣博碩士論文加值系統

燃料電池是由電模極組、雙極板、集電板、端板等元件所組成，而雙極板為燃料電池的主要零件，目前雙極板的材料是以石墨為主，但石墨雙極板機械性質差及加工速率慢，且雙極板的厚度受限於材料特性，對於整體燃料電池的單位體積功率無法有效的提升。而金屬雙極板具良好的電和熱導性，以及高強度、韌性及流道加工容易，若能以金屬材質取代石墨材質便可以達到降低電池重量、體積和生產成本等功效，將可以做到更輕薄、促進可攜式燃料電池發展、未來3C市場及廣泛運用等效益。
本研究目的為應用衝頭伺服運動曲線(包括不同成形速度、成形脈衝、持壓時間等)於金屬雙極板的衝壓製程上，藉以改善板材翹曲所引起的平坦度較差之問題，且使得等效應力及等效應變分布較均勻，與減少成品厚度減薄率。先以有限元素分析分析探討衝頭伺服運動曲線對於金屬雙極板衝壓成形之尺寸精度影響，且實驗驗證其所需成形力、外型尺寸及平坦度，藉以驗證有限元素分析應用於雙極板伺服衝壓製程之準確性，且觀察傳統運動曲線與伺服運動曲線及壓料力對金屬雙極板衝壓成形厚度及平坦度之影響。

The fuel cell is composed of membrane electrode assembly, bipolar plate, collector plate, end plate and other components, and the bipolar plate is the main part of the fuel cell. However, the mechanical properties and processing speed of the graphite bipolar plate are poor, and the thickness of the bipolar plate is limited by the material characteristics, which can,t effectively improve the unit volume power of the overall fuel cell. And the metal bipolar plate has good electrical and thermal conductivity, as well as high strength, toughness, and easy processing of flow channels. If metal materials can replace graphite materials, it can achieve the effects of reducing battery weight, volume, and production costs, which will achieve lighter and thinner, promote the development of portable fuel cells, future 3C market, and widespread application.
The purpose of this study is to apply the servo motion curve of the punch (including different forming speeds, forming pulses, holding time, etc.) to the stamping process of metal bipolar plates, in order to improve the problem of poor flatness caused by plate warping, and make the distribution of equivalent stress and equivalent strain more uniform, while reducing the thinning rate of finished product thickness. Firstly, finite element analysis is used to investigate the influence of punch servo motion curve on the dimensional accuracy of metal bipolar plate stamping forming. The required forming force, external dimensions, and flatness are experimentally verified to verify the accuracy of finite element analysis applied to bipolar plate servo stamping process. The influence of traditional motion curve、servo motion curve、pressing force on the thickness and flatness of metal bipolar plate stamping forming is also observed.

中文摘要 ................................................i
英文摘要 ................................................ii
誌謝....................................................iii
目錄....................................................iv
表目錄..................................................vii
圖目錄...................................................ix
符號說明 .................................................xiii
第一章 緒論...............................................1
1.1 前言..................................................1
1.2 研究動機與目的.........................................2
1.3 文獻回顧..............................................4
1.4 研究方法與步驟.........................................6
第二章 基礎理論............................................8
2.1 衝壓成形...............................................8
2.1.1 衝壓成形之特點........................................8
2.1.2衝壓成形之種類.........................................8
2.2衝床類別................................................8
2.3摩擦理論...............................................10
2.4有限元素分析軟體.......................................10
第三章 SUS304雙極板成形之有限元素分析.......................15
3.1 材料機械性質與摩擦係數.................................15
3.1.1 拉伸試驗............................................15
3.1.2 異向性指數..........................................16
3.1.3 摩擦試驗............................................20
3.2雙極板產品及模具設計....................................21
3.3 有限元素分析..........................................23
3.3.1 傳統運動曲線應用於金屬雙極板衝壓模擬分析..............23
3.3.2 伺服運動曲線應用於金屬雙極板衝壓模擬分析.............30
第四章 SUS304雙極板成形之衝壓實驗.........................50
4.1 SUS304雙極板模具.....................................50
4.2 傳統曲線應用於雙極板衝壓成形之實驗驗證.................51
4.3 伺服運動曲線應用於雙極板衝壓成形之實驗驗證.............54
4.4 探討衝頭運動曲線與製程參數對於SUS304雙極板之影響.......57
第五章 結論.............................................64
5.1 結論................................................64
5.2 未來展望............................................64
參考文獻 ................................................65
Extended Abstract........................................67

[1] 燃料電池市場:全球產業分析，趨勢，市場規模，2030年為止的預測，IEK產業情報網，https://ieknet.iek.org.tw/
[2] Albut, G. Brabie, ”The influence of the rolling direction of the joined steel sheets on the springbackintensity in the case of V-shape parts made from tailor welded strips”, Arch. Civ. Mech. Eng., Vol. 3, pp.5–12, 2006.
[3] F. Stachowicz, T. Trzepieciński, “Warm forming of stainless steel sheet”, Arch. Civ. Mech. Eng. Vol. 4,pp. 85–94, 2010.
[4] Y. Z. Lin, P. X. Lai, “Influence of the electric pulse on springback during stretch U-bending of Ti6Al4V titanium alloy sheets”, CIRP Annals – Manufacturing Technology, Vol. 68, pp. 120–126, 2014.
[5] J. Zhao, P. P. Zhan, R. Ma, R. X. Zhai, “Control strategy of over-bending setting round for pipe end oflarge pipes by mold press type method”, Trans. Non- ferrous Met. Soc. China, Vol. 22, pp. 329–334, 2012.
[6] T. Muranaka, H. Miyoshi, T. Kihara, M. Otsu, O. Haraguchi, “Draw bending method of seizure for pute titanium sheet “, in: Proceedings of the 11th International Conference on Technology of Plasticity, Nagoya Congress Center, Nagoya, Japan, October19–24, 2014.
[7] H. Li, H. Yang, F. F. Song, M. Zhan, G. J. Li, “Spring back characterization and behaviors of high strength Ti-3Al-2.5V tube in cold rotary draw bending”, J. Mater. Process. Technol. Vol. 212, 1973–1987, 2012.
[8] T. Deng, D. Li, X. Li, P. Ding, K. Zhao, “Hot stretch bending and creep forming of titanium alloy profile”,in: Proceedings of the 11th International Conference on Technology of Plasticity, Nagoya Congress Center,Nagoya, Japan, October 19–24, 2014.
[9] H. S. Kim, M. Koc, “Numerical investigations on springback characteristics of aluminum sheet metal alloys in warm forming conditions, J. Mater. Process. Technol., Vol. 204, pp. 370–383, 2008.
[10] J. Endou, “Innovation of press working by servo press”, Journal of the Japan Society for Technology of Plasticity, Vol. 49, pp. 100–104, 2011.
[11] K. Osakada, K. Mori, T. Altan, P. Groche, “Mechanical servo press technology for metal forming”, CIRP Annals – Manufacturing Technology, Vol. 60, pp. 651–672, 2011.
[12] H. Yamashita, H. Ueno, “Enhancing deep drawability through strain dispersion using stress relaxation, AIP Conf. Proc. Vol. 1567, pp. 688, 2013.
[13] 楊東昇、張宇良，SPCD鋼板機械性質及摩擦特性且應用於伺服運動曲線之深引伸製程，第三屆臺灣磨潤科技研討會，台南，2017。
[14] T. Maeno, K. Mori, A. Hori "Application of load pulsation using servo press to plate forging of stainless steel parts", Journal of Materials Processing Technology, Vol.214, pp1379–1387, 2014.
[15] K. Mori, K. Akita, Y. Abe, “Springback behaviour in bending of ultra-high-strength steel sheets using CNC servo press”, International Journal of Machine Tools & Manufacture, Vol. 47, pp. 321-325, 2007.
[16] Chun-Chih Kuo , Hao-Lun Huang, Tse-Chang Li , Kai-Lun Fang, Bor-Tsuen Lin, “Optimization of the pulsating curve for servo stamping of rectangular cup”,Journal of Manufacturing Processes,Vol. 56, pp. 990-1000, 2020.
[17] Yanli Song , Dingguo Dai , Ping Geng, Lin Hua, “Formability of aluminum alloy thin-walled cylinder parts by servo hot stamping”, Procedia Engineering, Vol. 207,pp. 741-746, 2017.
[18] 王祥賓、黃佑民，“燃料電池金屬雙極板微流道成形與效能之有限元素分析”，碩士學位論文，國立台灣科技大學機械工程系，2013。
[19] Y. Liu and L. Hua, “Fabrication of metallic bipolar plate for proton exchange membrane fuel cells by rubber pad forming”, Journal of Power Sources, Vol. 195, pp. 3529-3535, 2010.
[20] M. Koç and S. Mahabunphachai, "Feasibility investigations on a novel micro-manufacturing process for fabrication of fuel cell bipolar plates: Internal pressure-assisted embossing of microchannels with in-die mechanical bonding," J. Power Sources, vol. 172, n. 2, pp. 725-733, 2007.
[21] M. Koc, O. N. Cora, S. Mahabunphachai, "Effect of manufacturing processes on formability and surface topograghy proton exchange membrane fuel cell metallic bipolar plates", Journal of Power Sources ,vol. 195,pp. 127-132, 2010.
[22] DEFORM User’s Guide, 1999, Scientific Forming Technologies Corporation, Columbus OH.
[23] DYNAFORM User’s Manual，Engineering Tecchnology Associates，https://www.eta.com/