臺灣博碩士論文加值系統

藍寶石主要成分為高純度氧化鋁，晶格中氧離子為六方緊密堆積，鋁離子對稱的分佈在氧離子圍成的八面配體中心，晶格能很大，熔點，沸點很高，為高硬脆性材料，是屬於難切削材料的一種。
本文採用超音波輔助不同粒度鑽石磨棒進行加工，觀察加工面崩裂邊情況變化及表面粗糙度相關變化，因實驗物件須從圓柱形加工成3/5球形，加工中夾持方式的穩定性亦會影響工件品質及表面粗糙度，為此目的針對夾持方式進行修正強化，採用蠟及環氧樹脂進行固定輔助，增加夾持治具與工件間密合度減少切削過程切削力所產生震動，進而影響切削品質。
從結果發現，運用超音波可以改善加工效率及表面粗糙度，對於球形工件夾持鎖固方式，對於表面粗糙度也會有決定性的影響，因此，運用超音波輔助加工搭配大號數鑽石磨棒並以足夠厚度環氧樹脂黏合增加密合度後，可以得到較佳效果。

The sapphire is made by high quality α-alumina, in which the oxygen ions are tightly stacked in hexagons, and the symmetrical distribution of aluminum ions is in the octahedral ligand center surrounded by oxygen ions, the lattice can be very large, the melting point, the boiling point is very high, it is a high hard and brittle material, which is a kind of difficult cutting material.
In this study, uses ultrasonic assisted and diamond electroplated grinding rods of different grain sizes for processing, observing the changes in the cracking edge of the processing surface and the changes related to surface roughness, because the experimental objects must be processed from the cylindrical shape to a 3/5 spherical shape, the stability of the clamping method during processing will also affect the quality of the workpiece and the surface roughness, for this purpose, the gripping method is modified and strengthened, and the use of wax and oxy resin for fixed assistance, increasing the tightness between the grip fixture and the workpiece reduces the vibration generated by the cutting process cutting force, which in turn affects the cutting quality.
From the experiment results shows that using ultrasonic assisted milling can improve processing efficiency and surface roughness, and for the consolidation of spherical workpieces, it will also have a decisive impact on surface roughness, so the use of ultrasonic auxiliary processing with large numbers of diamond grinding rods and increase the tightness of oxy resin with sufficient thickness can obtain better results.

摘要......i
Abstract......ii
誌謝......iii
目錄......iv
表目錄......v
圖目錄......vi
第一章 前言......1
1.1 研究背景......1
1.2 研究動機與目的......2
1.3 文獻回顧......2
1.4 論文架構......11
第二章 理論基礎......12
2.1 藍寶石結構與特性......12
2.2 超音波切削輔助技術......12
2.3 球型工件夾持方式......15
第三章 實驗方法與規劃......17
3.1 工件材料與刀具特性......17
3.2 實驗儀器設備與規格......19
3.3 實驗方法與執行步驟......25
第四章 結果與討論......30
4.1 外球殼加工夾持......30
4.2 內外球殼加工順序......31
4.3 內球殼加工夾持......31
4.4 超音波輔助加工振幅......32
4.5 超音波輔助加工切削進給......34
4.6 綜合驗證......35
第五章 結論......39
參考文獻......40
Extended Abstract......42

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