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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 陳復國(Fuh-Kuo Chen) | |
dc.contributor.author | Ji-Gu Jiang | en |
dc.contributor.author | 姜季谷 | zh_TW |
dc.date.accessioned | 2021-06-16T02:47:17Z | - |
dc.date.available | 2025-08-01 | |
dc.date.copyright | 2020-08-07 | |
dc.date.issued | 2020 | |
dc.date.submitted | 2020-08-05 | |
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Xiang, “Application of software DYNAFORM to the tube forming process with multi-stages”, Advanced Materials Research, Vol. 399, pp. 1663-1666, 2012. [25] M. Mizumura, and Y. Kuriyama, “Effect of Bending Method on Tube Hydroforming”, Materials Transactions, Vol. 61, No. 3, pp. 515 to 521, 2020. [26] 陳梓維,「管件液壓成形局部脹形缺陷之研究」, 國立台灣大學機械工程研究所碩士論文,2016。 [27] C. Han and S. J. Yuan, F. Lin and L. N. Sun, “Wrinkle analysis and control of tube bending for hydroforming”, Journal of Plasticity Engineering, Vol. 16, pp. 1-4, 2009. [28] http://www.ylm.com.tw/ | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/54261 | - |
dc.description.abstract | 汽車產業近年發展趨勢為輕量化以及高強度,汽車業界已廣泛使用管件液壓成形技術取代傳統沖壓技術,通常管件液壓成形道次為:彎管、預成形、液壓成形。本論文針對彎管製程中芯球對彎管成形及液壓成形之影響進行研究,並針對其做優化與改善。 本論文首先建立CAE彎管製程道次之分析流程與分析參數,並針對彎管幾何參數、製程參數、芯球參數以及材料參數進行探討,了解各參數對彎管成形之影響程度,針對彎管製程管材會有破裂、不飽滿等缺陷進行量化,完成統整數據並比較彎管成形及後續液壓成形性的影響探討。 在了解彎管成形後,本論文進行彎管製程對液壓製程的影響性說明。首先,探討彎管模擬的必要性,討論彎管模擬分析與有限元素法PAM-STAMP內建STB模組之差異性,並驗證得在液壓成形模擬時加入彎管模擬分析結果的準確性較高。在確立彎管模擬的必要性後,由於最能影響彎管截面變化的便是芯球的添加,因此探討彎管模擬中芯球使用的時機,以膨脹率和截面形狀入手,討論出最佳使用時機。由於液壓件之彎管成形並不是最終產品,所以不需要有最完美之截面形狀,而是要有利於後續的液壓製程,因此在參數設定上可做調整,透過芯球參數、管材幾何參數等進行探討,並優化液壓結果。藉由本論文之研究成果建立彎管製程管件的機台參數及芯球參數之選擇,並對需要液壓之管件在彎管製程時,有判斷芯球使用與否的通則,並對芯球參數、管材幾何參數選擇做一整理。 | zh_TW |
dc.description.abstract | In recent years, the development trend in the automotive industry is light weight and high strength. The automotive industry has widely used tube hydroforming technology to replace traditional stamping technology. Generally, a tube hydroforming process includes tube bending, pre-forming and hydroforming. This thesis focuses on the research of tube bending technology in the tube bending process and the tube-hydroforming process. First, the analytical procedures and the analytical parameters of the manufacturing processes of CAE were established. The geometric parameters of tube, process parameters, parameters of mandrel ball and material parameters were also explored to understand the degree of impact of each parameter in the tube bending process. This thesis focuses on the defects such as cracking and cross-section not fully filled in the tube bending process. In order to integrate the data to compare the formability of tube bending and subsequent hydroforming, these defects must be quantified. After understanding the tube bending process, this thesis describes the influence of the tube bending process on the tube hydroforming process. The necessity of tube bending will be discussed, the analysis of the bending model and the differences by utilizing finite element method which uses PAM-STAMP for built-in simplified tube bending model were also explored. It was proposed that the hydroforming model with bending simulation resulted will be more accurate. After establishing the necessity of tube bending simulation, it is the addition of the mandrel balls that affect the cross-sectional change the most. Therefore, the next discussion will be the timing of using the mandrel balls in the simulation of the tube bending. Starting with the expansion rate and the cross-section shape, we discuss the best timing of using mandrel balls. Since the tube bending of hydroforming parts is not the final product, it does not need to have the perfect cross-section shape, but it has to facilitate the hydroforming process. It can be adjusted through the parameters of mandrel ball and bending curve, etc. Through the research results of this thesis, the selection of the tube bending machine parameters and mandrel ball parameters of the tube bending process is established. Moreover, the tubes which require tube hydroforming, there is a general rule for deciding whether the mandrel ball should be used or not furthermore arrange the selection of bending curve parameters and the mandrel ball parameters. | en |
dc.description.provenance | Made available in DSpace on 2021-06-16T02:47:17Z (GMT). No. of bitstreams: 1 U0001-0308202017405100.pdf: 4521466 bytes, checksum: d92263329f359adbbcf59bc9d9513b97 (MD5) Previous issue date: 2020 | en |
dc.description.tableofcontents | 目錄 I 圖目錄 V 表目錄 X 第一章 緒論 1 1.1 研究背景與目的 1 1.2 研究方法與步驟 3 1.3 文獻回顧 4 1.4 論文總覽 6 第二章 彎管製程介紹與模擬建立 8 2.1 彎管機彎管製程介紹 9 2.2 有限元素法軟體介紹 13 2.3 彎管製程CAE模擬建立 13 2.3.1 彎管CAE模擬參數 14 2.3.2 常見之彎管心線 15 2.3.3 彎管製程CAE模擬之收斂性分析 17 2.4 彎管製程缺陷探討 21 2.4.1 彎管外側不飽滿 21 2.4.2 破裂 24 2.4.3 回彈 26 2.4.4 皺褶 27 第三章 彎管參數和芯球之影響性分析 29 3.1 管材幾何參數之影響性分析 29 3.1.1 彎管半徑大小對彎管成形之影響 30 3.1.2 管徑大小對彎管成形之影響 33 3.1.3 管材厚度大小對彎管成形之影響 36 3.1.4 彎管角度大小對彎管成形之影響 38 3.2 製程參數之影響性分析 41 3.2.1 導模夾持力對彎管成形之影響 41 3.2.2 夾模夾持力對彎管成形之影響 42 3.2.3 助推力對彎管成形之影響 44 3.2.4 芯球與管壁之摩擦係數對彎管成形之影響 45 3.3 芯球參數之影響性分析 46 3.3.1 芯球數目對彎管成形之影響 47 3.3.2 芯球直徑大小對彎管成形之影響 49 3.3.3 芯球厚度大小對彎管成形之影響 52 3.3.4 芯球間距大小對彎管成形之影響 54 3.3.5 芯球曲率半徑大小對彎管成形之影響 56 3.4 材料性質之影響性分析 58 3.4.1 材料n值對彎管成形之影響 58 3.4.2 材料YS值對彎管成形之影響 62 3.5 討論 65 第四章 彎管芯球對管件液壓製程之重要性 67 4.1 有無彎管分析對液壓製程之影響性 67 4.2 芯球的使用時機及對液壓製程之影響性 72 4.2.1 膨脹率大小對液壓製程之影響性 75 4.2.2 截面形狀對液壓製程之影響性 77 4.3 討論 80 第五章 彎管芯球對管件液壓之影響性分析 81 5.1 芯球尺寸設計對液壓製程之影響性 81 5.1.1 芯球數目對液壓製程之影響 81 5.1.2 芯球直徑大小對液壓製程之影響 83 5.1.3 芯球厚度大小對液壓製程之影響 84 5.1.4 芯球間距大小對液壓製程之影響 86 5.1.5 芯球曲率半徑大小對液壓製程之影響 87 5.2 材料性質對液壓製程之影響性 88 5.2.1 n值大小對液壓製程之影響 88 5.2.2 YS值大小對液壓製程之影響 89 5.3 管材幾何參數對液壓製程分析之影響性 90 5.3.1 彎管半徑大小對液壓製程分析之影響性 91 5.3.2 管徑大小對液壓製程之影響性 93 5.3.3 厚度大小對液壓製程之影響性 95 5.4 低壓對液壓製程分析之影響性 96 5.5 討論 99 第六章 結論 101 參考文獻 103 | |
dc.language.iso | zh-TW | |
dc.title | 彎管製程特性對管件液壓成形性之影響研究 | zh_TW |
dc.title | A Study of the Effect of Tube-Bending Performance on the Tube-Hydroforming Formability | en |
dc.type | Thesis | |
dc.date.schoolyear | 108-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 黃永茂(Yong-Mao Hwang),林恆勝(Heng-Sheng Lin),江卓培(Cho-Pei Jiang),蔡恆光(Heng-Kuang Tsai) | |
dc.subject.keyword | 彎管成形,管件液壓成形,減薄率,有線元素法,芯球, | zh_TW |
dc.subject.keyword | tube bending,tube-hydroforming,thinning rate,finite element analysis,mandrel ball, | en |
dc.relation.page | 106 | |
dc.identifier.doi | 10.6342/NTU202002300 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2020-08-06 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 機械工程學研究所 | zh_TW |
顯示於系所單位: | 機械工程學系 |
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