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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/79226
標題: | 基於延展實境及可視化有限元素分析的手工電弧銲接實作訓練及教學系統 An extended reality-based training and tutorial system for hands-on practice of manual metal arc welding and finite element analysis visualization |
其他標題: | An extended reality-based training and tutorial system for hands-on practice of manual metal arc welding and finite element analysis visualization |
作者: | 柯帕娜 Kalpana Shankhwar |
指導教授: | 陳湘鳳 博士 Shana Smith |
關鍵字: | 延展實境, 虛擬實境, 混合實境, 手工金屬電弧焊, 焊接訓練, 視覺觸覺, 有限元素法, Extended reality, virtual reality, mixed reality, manual metal arc welding, welding training, visuo-haptic, finite element analysis., |
出版年 : | 2022 |
學位: | 博士 |
摘要: | 由於焊接具備簡單及高度的可靠性,因此常成為製造業於各種應用中最受歡迎的連接工藝之一。在各式不同的焊接工藝中,手工金屬電弧焊(Manual Metal Arc Welding ,MMAW)具備方便攜帶、可由操作人員親自進行操作等特點,因此成為受歡迎的焊接工藝手法。而為新手焊工提供MMAW之培訓成為工業中的一項重要任務。然而,此項工藝很難通過傳統課堂教學來描述複雜的概念;焊接過程會產生高溫及有害紫外線(Ultraviolet,UV)),使危險度大幅增加;焊接培訓也常耗費大量能源和材料。因此,提供具備高效率、高成本效益,且並無風險的焊接培訓環境進行尤為重要。
在焊接過程中,焊板溫度分佈不均勻會產生殘留應力,將對焊板的疲勞強度產生負面影響。焊板不均勻熱脹冷縮也會產生結構變形,影響最終產品品質。因此,使用有限元素法(Finite Element Method,FEM)進行殘留應力和熱變形分析有其必要性。 為了解決上述焊接培訓的當前不足和挑戰,本研究利用延展實境(Extended Reality ,XR)技術開發了一種互動式焊接教學系統,其包含三項與XR技術應用相關的研究。首先,開發用於基本手工金屬電弧焊培訓的XR互動式教學系統,提供使用者在VR環境中學習基礎焊接基知識。其次,開發具備視覺及觸覺的XR手工金屬電弧焊培訓系統,在焊接培訓期間提供真實的磁力和熱量,以用來模擬真實焊接過程中的觸覺回饋。最後,開發了具備混合實境(Mixed Reality,MR)的使用者介面,將有限元素分析其殘餘應力和變形進行可視化,在MR環境中進行實時渲染。本研究透過將XR技術用於焊接教育、培訓及設計,透過使用者測試,驗證了本系統的完整度及可行性。 Welding is one of the most popular joining processes in manufacturing industries for a variety of applications due to its simplicity and reliability. Among the wide range of welding processes, manual metal arc welding (MMAW) is preferred the most, which is portable and can be performed by human operators. Therefore, providing MMAW welding training to novice welders is an important task in industry. However, it is difficult to describe complex welding concepts through the traditional classroom teaching method. Welding is also a dangerous process involving high temperature and harmful ultraviolet (UV) radiation. In addition, welding training causes a significant amount of wastage of energy and material. Therefore, it is necessary to find an efficient and cost-effective way to provide welding training in a risk-free environment. During the welding process, the non-uniform distribution of temperature on the weld plates causes residual stress, which negatively affects the fatigue strength of the weld plates. The non-uniform thermal expansion and contraction of the weld plates also produce structural deformation, affecting the final product quality. Therefore, it is necessary to conduct the residual stress and deformation analysis using finite element method (FEM). In order to resolve the aforementioned challenges and shortcomings of the current welding training, this study utilizes XR technology to develop an interactive XR-based welding tutorial system with hands-on practice. This thesis involves three studies related to the applications of extended reality (XR) technologies. First, an interactive XR-based tutorial system for fundamental manual metal arc welding training is developed. The XR-based tutorial system provides users with fundamental knowledge of welding in a VR environment. Second, a visuo-haptic XR-based training system for hands-on manual metal arc welding training is developed. Realistic magnetic force and heat during the welding training is provided to simulate the haptic feedback in a real welding process. Lastly, an interactive user interface for the visualization of finite element analysis in mixed reality (MR) is developed. The residual stress and deformation can be rendered in an MR environment in real time. In this dissertation, the XR technologies were employed in welding application for education, training and design purposes. The developed systems were validated for their performance and feasibility by conducting the user studies. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/79226 |
DOI: | 10.6342/NTU202210024 |
全文授權: | 同意授權(全球公開) |
顯示於系所單位: | 機械工程學系 |
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