| 研究生: |
黎琇瑩 Li, Hsiu-Ying |
|---|---|
| 論文名稱: |
窗形模鋁擠型之三維有限元素分析與製程參數研究 Investigation on 3D Finite Element analysis and Processing Parameters for Porthole Die of Al extrusion |
| 指導教授: |
李榮顯
Lee, Rong-Shean |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 機械工程學系 Department of Mechanical Engineering |
| 論文出版年: | 2004 |
| 畢業學年度: | 92 |
| 語文別: | 中文 |
| 論文頁數: | 88 |
| 中文關鍵詞: | 鋁合金 、有限元素分析 、田口式實驗設計法 、窗形模擠製 |
| 外文關鍵詞: | Taguchi experimental design method, aluminum alloy, porthole die extrusion, finite element analysis |
| 相關次數: | 點閱:116 下載:6 |
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當窗形擠製模具被用於擠製高強度鋁合金時,模具極易發生破壞。本文利用有限元素分析軟體DEFORM-3D與田口式實驗設計法,以系統化的方式模擬分析出模具在製程中所承受的應力。依據模具設計者所提供模具修改建議以及模具破壞處,將模具設計參數化。使用直交表規劃出模擬實驗組來進行電腦模擬,可由模擬結果檢視出模具於擠製製程中應力的變動情形。由田口式回應分析可反應出各個因子不同水準間之差異,進而得知各個模具設計因子對於模具承受的應力有何影響,並獲得一組最佳化設計的組合參數。
模擬結果顯示可出高等效應力區位置與實際模具破損位置相符。本文對於田口方法所得的最佳化模具設計之參數組合進行電腦模擬分析,其模擬結果顯示為一可行之設計。
The pothole die is susceptible to failure when it is used in the hot extrusion of the high strength aluminum alloy. Through the FEM package DEFORM-3D and Taguchi experimental design method, this thesis systematically analyzes the stress of porthole die in the 3-D extrusion of high strength aluminum. According to the advices provided by the die designer and the fracture positions on the porthole die, the tool geometric parameters were set into several values. Taguchi’s orthogonal array is applied to plan the simulation experiments simulated by FEM. The predicted results showed the die stress variation in extrusion process. After Taguchi’s response analysis, the differences between the levels among parameters were shown. Therefore, the influence of each factor for the die stress was understood, the optimal design parameters were obtained.
The positions of high effective stress obtained by the FEM simulation agreed quite well with the facture positions of the actual porthole die. The porthole die extrusion process with design parameters obtained by Taguchi method were simulated. The simulation result showed that it is a feasible scheme.
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