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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 李貫銘 | zh_TW |
| dc.contributor.advisor | Kuan-Ming Li | en |
| dc.contributor.author | 羅仁辰 | zh_TW |
| dc.contributor.author | Ren-Chen Lo | en |
| dc.date.accessioned | 2023-09-22T17:49:20Z | - |
| dc.date.available | 2023-11-10 | - |
| dc.date.copyright | 2023-09-22 | - |
| dc.date.issued | 2023 | - |
| dc.date.submitted | 2023-08-10 | - |
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[33] Haibo Lu, Hui Liu, Chenhao Wang, "Review on strategies for geometric accuracy improvement in incremental sheet forming," The International Journal of Advanced Manufacturing Technology, vol. 102, p. 3381–3417, 2019. [34] Sherwan Mohammed Najm, Imre Paniti , "Investigation and machine learning-based prediction of parametric effects of single point incremental forming on pillow effect and wall profile of AlMn1Mg1 aluminum alloy sheets," Journal of Intelligent Manufacturing, vol. 34, p. 331–367, 2023. | - |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/90198 | - |
| dc.description.abstract | 漸進成形技術能輕鬆製造出傳統製程難以實現的複雜形狀和結構，有著靈活的生產能力，因此能有效地進行單件和小批量製造，從而實現產品的客製化。漸進成形還能節省時間和成本，無需製作和更換昂貴的模具，便可直接製作出實物。
儘管漸進成形技術具有高度的自由度，其精度控制仍然是一個重要且未得到充分解決的問題。本研究運用有限元素軟體ABAQUS對AA1050-O板材單點、雙點漸進成形進行分析，目的是了解不同邊界條件對精度的影響，並將這些結果作為後續優化漸進成形過程的依據。除了分析單點、雙點漸進成行的成形性之外，也分析其回彈現象。此外，本研究還討論了其他的加工誤差，如枕頭效應，這也是漸進成形中經常出現的一種不利現象，可能導致成形表面的不規則。由模擬結果得知包辛格效應對AA1050-O造成的影響，為材料降伏強度降低導致軟化，使得單點漸進成形初期加工時杯口處的彎曲(bending)尤為嚴重。而雙點漸進成形(TPIF)所造成的局部應力少於單點漸進成形，因此恢復的彈性能量也較小，因此減少了回彈量，提高了加工精度。同時，TPIF在厚度分布和精度方面比SPIF更好。因此可推知TPIF的加工機制下，可以更有效地控制變形，從而達到更好的厚度均勻性和更高的精度。 | zh_TW |
| dc.description.abstract | Incremental forming technology can easily produce complex shapes and structures that are difficult to achieve with traditional processes, it provides flexible production capabilities, effectively performing single-piece and small batch manufacturing, thereby achieving product customization. Incremental forming also saves time and cost, without the need to manufacture and replace expensive molds, objects can be made directly from electronic design files.Although incremental forming technology has a high degree of freedom, precision control remains a crucial yet unresolved issue. Springback phenomenon, as part of these errors, often leads to deviations in component dimensions, thereby affecting product quality. In addition, we also discuss other processing errors, such as the pillow effect, which is also a common disadvantage in incremental forming, which may lead to irregularities on the formed surface. The purpose of this study is to reveal the root causes of these errors and propose possible solutions to improve the accuracy and quality of incremental forming.This research uses the finite element software ABAQUS to analyze single-point and double-point incremental forming, with the aim of understanding the impact of different boundary conditions on accuracy. These results will serve as a basis for subsequent optimization of the incremental forming process. The data obtained from the analysis will help us better understand the springback mechanism and further propose effective compensation strategies to improve the efficiency and accuracy of the forming process. | en |
| dc.description.provenance | Submitted by admin ntu (admin@lib.ntu.edu.tw) on 2023-09-22T17:49:20Z No. of bitstreams: 0 | en |
| dc.description.provenance | Made available in DSpace on 2023-09-22T17:49:20Z (GMT). No. of bitstreams: 0 | en |
| dc.description.tableofcontents | 口試委員會審定書 I
誌謝 II 摘要 III Abstract IV 目錄 V 圖目錄 VII 表目錄 X 第一章 緒論 1 1.1 前言 1 1.2 研究動機與目的 5 1.3 研究方法 7 1.4 文獻回顧 8 1.5 論文總覽 11 第二章 單、雙點漸進成形加工 12 2.1單、雙點漸進成形機制 12 2.1.1板材受力分析 12 2.1.2板材受力模式 15 2.2漸進成形回彈機制 17 2.2.1單、雙點漸進成形的回彈種類 17 2.2.2漸進成形回彈方向探討 19 2.3鋁合金性質探討 20 2.3.1鋁合金分類方法 20 2.3.2 AA1050鋁合金簡介 21 2.3.3材料模型建立 23 2.3.4 AA1050-O 降伏準則探討 24 2.3.5 AA1050-O加工硬化準則探討 24 第三章 模擬模型建立 29 3.1 FEA軟體ABAQUS 30 3.1.1網格劃分與節點設置 31 3.1.2邊界條件設定 32 3.1.3收斂性測試結果 33 3.1.4 Predefined Field功能 40 3.1.5後處理 41 3.2工具路徑生成 42 3.3模型驗證 44 第四章 單、雙點漸進成形結果差異 46 4.1漸進成形之成形性 49 4.1.1厚度分布差異 49 4.1.2最大成形角度 51 4.2回彈及加工誤差的量化分析 54 4.2.1杯口處彎曲(Bending) 54 4.2.2漸進成形之包辛格效應探討 56 4.2.3漸進成形的局部回彈(local springback) 59 4.2.4漸進成形的整體回彈(Global springback) 67 4.3小結 68 第五章 結論與未來展望 70 參考文獻 72 | - |
| dc.language.iso | zh_TW | - |
| dc.subject | 單點漸進成形 | zh_TW |
| dc.subject | 成形性 | zh_TW |
| dc.subject | 雙點漸進成形 | zh_TW |
| dc.subject | 回彈量 | zh_TW |
| dc.subject | 電腦輔助工程 | zh_TW |
| dc.subject | Two point incremental forming | en |
| dc.subject | Formability | en |
| dc.subject | Springback | en |
| dc.subject | Single point incremental forming | en |
| dc.subject | Computer Aided Engineering (CAE) | en |
| dc.title | 鋁合金漸進成形之成形性與回彈分析 | zh_TW |
| dc.title | Analysis of Formability and Springback in the Incremental Forming Process of Aluminum Alloy Sheets | en |
| dc.type | Thesis | - |
| dc.date.schoolyear | 111-2 | - |
| dc.description.degree | 碩士 | - |
| dc.contributor.oralexamcommittee | 盧銘詮;黃庭彬 | zh_TW |
| dc.contributor.oralexamcommittee | Ming-Chyuan Lu;Tyng-Bin Huang | en |
| dc.subject.keyword | 單點漸進成形,雙點漸進成形,成形性,回彈量,電腦輔助工程, | zh_TW |
| dc.subject.keyword | Single point incremental forming,Two point incremental forming,Formability,Springback,Computer Aided Engineering (CAE), | en |
| dc.relation.page | 76 | - |
| dc.identifier.doi | 10.6342/NTU202304039 | - |
| dc.rights.note | 未授權 | - |
| dc.date.accepted | 2023-08-12 | - |
| dc.contributor.author-college | 工學院 | - |
| dc.contributor.author-dept | 機械工程學系 | - |
| 顯示於系所單位： | 機械工程學系 | |
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