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題 名 | 以有限元素模擬及類神經網路進行內齒輪冷精鍛模具應力分析與預測=Employing Finite Element Simulation and Neural Network to Analyze and Predict the Stress of Cold Forging Die for Internal Gear |
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作 者 | 許源泉; 林萬益; 梁三和; | 書刊名 | 國立虎尾科技大學學報 |
卷 期 | 26:1 2007.03[民96.03] |
頁 次 | 頁11-19 |
分類號 | 446.886 |
關鍵詞 | 內齒輪; 冷精鍛模具; 有限元素模擬; 類神經網路; Internal gear; Cold forging die; Finite element simulation; Neural network; |
語 文 | 中文(Chinese) |
中文摘要 | 以冷精鍛塑性成形法來製造齒輪,因具有節省材料、強度高、抗疲勞性能佳等等諸多優點,故已漸倍受重視,但如何有效穩定模具品質延長模具壽命是冷精鍛齒輪製程中頗為重要的課題。本研究乃應用三維剛塑性有限元素數值模擬技術進行內齒輪的冷精鍛塑性成形分析,並探討內徑、外徑、應變硬化指數、材料強度係數及表面粗糙度等胚料特性對冷精鍛模具的影響,其後利用類神經網路建構出這五種胚料特性與冷精鍛模具應力的關係預測模式。研究發現,在上模的齒頂及下模的齒腹為應力集中區,需特別注意,以提高模具的壽命。胚料的外徑及應變硬化指數,對於上模模具應力雖有影響但較不顯著,而胚料之材料強度係數及胚料表面粗糙度或潤滑效果對模具應力則有較為顯著的影響。此外,利用類神經網路建構內齒輪冷精鍛時,胚料特性與模具應力間的預測模式,具有相當的方便性與參考性。 |
英文摘要 | Due to the advantage of material reduction, improved strength and fatigue resistance etc., the employment of cold forging process to manufacture gears has been an important technique. But how to effectively promote the die quality and increase its service life is the important issue in cold precision forging process for gear production. In the current study, the 3D rigid-plastic finite element simulation technique was used to analyze the plastic forming of cold forging for internal gear. The influences of characters such as inside diameter, outside diameter, harden-strained exponent, strength coefficient and surface roughness, on cold forging loads were explore firstly. Then, the relation prediction model of the five billets' characters to the cold forging load was constructed through the neural network. The results indicated that the tooth top of upper die and the tooth flank were the stress-centered zone. The outside diameter and harden-strained exponent of billet did not have obvious influence on the stress of upper die, while the material strength coefficient and surface roughness or lubricant effect of billet had obvious influence on die stress. The predictive model constructed by neural network can also provide valuable references in predicting the forging deformation and forging load for internal gear. |
本系統中英文摘要資訊取自各篇刊載內容。