博碩士論文 89323075 詳細資訊




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姓名 鄭文堡(Wen-Bao Zheng)  查詢紙本館藏   畢業系所 機械工程學系
論文名稱 金屬粉末射出成型二維毛細吸附脫脂及飽和度之研究
(The influence of the saturation in metal injection molding.)
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摘要(中) 金屬粉末射出成型結合了射出成型和傳統粉末冶金的優點,具有高精密度、高複雜性等優點。然而在整個製造的過程中,脫脂過程對於成品品質影響甚巨,不僅費時,更有可能造成製程的失敗。
因此本文嘗試利用數值的方法以及結合多孔性介質的理論,並且導入飽和度的概念,來模擬毛細吸附脫脂的過程,巨觀上的對二維毛細吸附脫脂進行探討,嘗試以數值模擬飽和度對整個毛細吸附脫脂機制之影響,並以數值模擬出整個脫脂過程壓力和飽和度的分佈,並且預測脫脂的時間,並將結果和沒有考慮飽和度的情形作一比較。
摘要(英) Metal injection molding (MIM) is a method in metallurgy that combines the benefits from both plastic molding and powder molding. Its advantages include high capacity and high accuracy. In the MIM production processes, debinding is the most important and time-consuming stage Failing in this key process always leads to the overall failure of the MIM production.
To analyze the global behavior of the two-dimensional wick debinding, we apply Darcy’s law and the finite difference technique combined with the body-fitted grid generation method. The influence of the saturation on the wick-debinding mechanism is included. The numerical method is used to simulate the probability of pressure field and predict the wick-debinding time is simulated. Results with/without the consideration of saturation are also compared.
關鍵字(中) ★ 金屬粉末
★ 毛細
★ 飽和度
關鍵字(英) ★ saturation
★ powder
論文目次 英文摘要………………………………………………………………
摘要………………………………………………………………
目錄……………………………………………………………………
表目錄…………………………………………………………………
圖目錄…………………………………………………………………
符號說明………………………………………………………………
第一章、序論…………………………………………………………
1-1 前言……………………………………………………
1-2 MIM的製造流程………………………………………
1-3 粉末原料………………………………………………
1-4 黏結劑…………………………………………………
1-5 MIM問題研究…………………………………………
1-6 文獻回顧……………………………………………….
1-6-1 基本回顧…………………………………………….
1-6-2 毛細吸附脫脂的理論和實驗……………………….
1-7 研究目的……………………………………………….
第二章、理論模式 ……………………………………………………
2-1 基本假設………………………………………………
2-2 統御方程式的建立……………………………………
2-3 飽和度…………………………………………………
2-4滲透率………………………………………………….
2-5 孔隙率…………………………………………………
2-6毛細壓力……………………………………………….
2-7無因次參數…………………………………………….
第三章、數值方法……………………………………………………
3-1 數值技巧………………………………………………
3-2二維橢圓座標系統之轉換……………………………..
3-3 數值計算流程…………………………………………
第四章、結果與討論 …………………………………………………
4-1 數值模擬結果…………………………………………
4-2 無因次分析……………………………………………
4-3 粉末粒徑對脫脂時間的影響…………………………
第五章、結論 …………………………………………………………
第六章、參考文獻……………………………………………………
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指導教授 洪勵吾(L. W. Hourng) 審核日期 2002-7-23
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