博碩士論文 102353027 詳細資訊




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姓名 謝俊傑(XIE, JUN-JIE)  查詢紙本館藏   畢業系所 機械工程學系在職專班
論文名稱 雷射焊補運用於壓鑄模具壽命改善研究
(Study on die- casting die service life improvement by laser-remelting process)
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摘要(中) 壓鑄是工業中應用極為廣泛而重要製造方法之一,但作業環境因其高熱、高噪音而常令人感到屬於危險、辛苦、骯髒的3K工作。所以較少人願意投身其中,而其相關研究大多見於學術上。在壓鑄製程中最重要的關鍵之一為其模具壽命的延長,而模具壽命的長短攸關整體產能與品質甚為巨大。本論文研究了雷射焊補的技術延長模具壽命,且在微觀組織當中探討了模具發展熱龜裂的主因與為何模具經過雷射焊補後延緩熱龜裂的發生,最後運用了CAE技術探討發生熱龜裂發生的高風險區域。
摘要(英) High pressure die-casting is one of the most widely used and important manufacturing method in modern industry, but the working environment is often dangerous, hard and dirty due to its high temperature and high noise. This is the reason why fewer people are willing to devote themselves to the job, and furthermore, most of researches about high pressure die-casting is academic study. One of the most important problem in the die-casting process is die service life improvement, and the problem affects not only capacity of production but also quality. In this paper, die- casting die service life improvement by laser-remelting process is investigated. In the view of microstructure, the main cause of thermal fatigue crack of die-casting die and inhibiting the propagation of the crack is discussed. Finally, finding the high-risk region where thermal fatigue crack occurs is worked out by the application of CAE(Computer Aided Engineering) technology.
關鍵字(中) ★ 壓鑄
★ 雷射焊補
★ 熱龜裂
關鍵字(英) ★ die-casting
★ laser-remelting process
★ thermal fatigue crack
★ CAE
論文目次 目錄
摘 要 i
Abstract ii
誌 謝 iii
目 錄 iv
圖目錄 vii
表目錄 xii
符號說明 xiii
第一章緒論 1
1-1 前言 1
1-2 研究動機與目的 2
1-3 文獻回顧 5
第二章 鋁合金壓鑄介紹 9
2-1 壓鑄機介紹 9
2-1-1. 熱室壓鑄 9
2-1-2. 冷室壓鑄 12
2-2 改善鋁合金壓鑄模具壽命方法 16
2-2-1 模具材料 20
2-2-2 模具熱處理 28
2-2-3 模具表面局部處理 29
2-2-4 模具表面塗層 31
2-2-6 壓鑄CAE應用 35
第三章 雷射焊補模具 36
3-1 前言 36
3-2 產品瑕疵 39
3-3 雷射焊補模具 42
3-4 試驗樣品與探討 44
3-5 雷射焊接後對熱龜裂之抵抗能力討論 52
第四章 CAE模擬分析 55
4-1 前言 55
4-2 數值模擬分析的數學模型 55
4-3 模擬結果與分析 60
第四章 結論 76
參考文獻 78
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指導教授 傅尹坤(Yiin-Kuen Fuh) 審核日期 2018-11-5
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