Optimal Analysis of Sheet Metal Forming of Vehicle for Special Alloy

汽車鈑金修護成型之最佳化分析

黃茗禧(Ming-Hsi Huang) ； 張振龍(Cheng-Long Chang)

《修平學報》 40期 (2020/03) Pp. 39-48

摘要

Vehicle manufacturing technology have getting more and more progress. It is toward the vehicle body weight and high strength can be made for green developing mode. Not only the vehicle performance improving, but also the development of many of the aluminum alloy body, the aims of lightweight without losing the intensive can be achieved. It can reduce weight, save energy and increase speed. It has been adopted by many foreign advanced sports car manufactures. The sheet metal recovery technology of this advanced car body has difficulties and challenges in construction, such as forming rebounds, hot melt, and damage. In particular, the failure rate caused by the metal forming process is not affordable to technicians. Therefore, how to find the appropriate sheet metal forming model, find the best pull point, the best effort distance, get the shortest working time to restore the shape, get the best solution and reference data to solve the problem, and is the problems for the engineers and the technicians. This study will use the finite element method and engineering analysis software to analyze the shape and size deformation of the special aluminum alloy drawing of the door for the door part of the vehicle body. To verify the correctness of the finite element model and numerical analysis of this study, the simulation results will be compared with the experimental results. In addition, the thermal deformation state of the door surface is discussed, and the parameters of the processing and processing under the heated state can be used to provide reference for the sheet metal mode of the new structural material, thereby reducing unnecessary errors and losses in the sheet metal process.

關鍵字

Finite Element ； Metal Forming

並列摘要

車輛製造技術日新月異，朝向車體的輕量化與高強度化的綠能製造方式發展，由於車輛性能的不斷提升，也發展出許多的鋁合金材質車體，充分發揮鋁合金的特性，達到輕量化又不失強度的目的，可大量減輕重量、節省能源、提高速度，已由許多國外高級的轎跑車所採用。對此種先進車體的鈑金復原技術，由於會產生成型回彈、熱融化、破損等施工的困難與挑戰，尤其鈑金過程所造成的失敗率，亦非技師所能承受的。因此如何尋求適當的鈑金模式，找出最佳的拉拔著力點、最佳的著力距離，得到恢復成型的最短工時，能獲得最佳解答與參考數據來解決問題，乃是工程師與技師們的一大難題。本研究將針對車體之車門部位，利用有限元素法與工程分析軟體進行車門特殊鋁合金拉拔成型之形狀尺寸變形分析，為驗證本研究有限元素模型及數值分析的正確性，模擬結果並將與實驗結果進行比較。另外，並探討車門曲面之熱變形狀態，在受熱狀態下的處理加工之參數，期能對新結構材料之鈑金模式提供參考，減少鈑金過程中不必要的錯誤與損失。

並列關鍵字

有限元素分析 ； 金屬成型

參考文獻

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