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題 名 | Analysis and Modeling of the Bending Performances of the Circular Holes in the Fold Zone during the L-shape Bending Process=L型彎曲過程中折疊區圓形孔的彎曲性能之分析與建模 |
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作 者 | 劉南明; 江可達; 洪振聰; 陳世峰; | 書刊名 | 修平學報 |
卷 期 | 21 2010.09[民99.09] |
頁 次 | 頁63-83 |
分類號 | 446.8 |
關鍵詞 | 孔; 折疊區; 回彈; L型彎曲過程; 反應曲面法; Hole; Fold zone; Spring-back; L-shape bending process; Response surface methodology; |
語 文 | 英文(English) |
中文摘要 | 本文提出一有系統方法來分析與建模於L型彎曲過程中折疊區上圓形孔的彎曲性能。所提出有系統實驗設計方法是以反應曲面法為基礎,用以來瞭解位於折疊區上各式圓形孔的彎曲性能。本文實驗設計是所採取用中央組合轉動設計法。在不同厚度素材與模具圓角半徑下為瞭解折疊區各式圓形孔的彎曲性能,其孔徑與孔數被採用為實驗參數,而其回彈角度作為性能評估的指標。其結果顯示為當增加其孔徑與孔數時將提升其回彈角度値,而回彈角度値也隨著素材厚度的增加而增大,但隨著模具圓角半徑的增加而緩和地增大。依據其確認實驗結果,其獲得預測值與實驗值間誤差百分比位於−4.45到3.40%範圍內。並經由變異數分析,證實本文所提出二階數學模式具有合理正確性。 |
英文摘要 | This paper presents a systematic methodology to analyze and model the bending performances of the circular holes in the fold zone during the L-shape bending process. The systematic experimental design based on the response surface methodology (RSM) is applied to identify the influences of various circular holes on the bending performances. The experiment plan adopts the central composite rotatable design (CCRD). For investigating the influences of various circular holes on the fold zone, the diameter and number of holes were adopted as experimental parameters in the state of various thicknesses with blank and die corner radius. The spring-back angle is regarded as the bending performance characteristics. Results show that increasing both the number and diameter of holes favors higher value of spring-back angle. The value of spring-back angle decreases with the increase of blank thickness, but generally increases with the increase of die corner radius. In accordance with confirmation run experiments, the percentage error between the actual and predicted values ranges from −4.45 to 3.40%. And being based on the analysis of variance, the quadratic mathematical model developed was reasonably accurate. |
本系統中英文摘要資訊取自各篇刊載內容。