臺灣博碩士論文加值系統

精密陶瓷滾珠軸承因具有耐熱、耐蝕及耐磨等良好性質，已廣泛被應用於精密機械。傳統滾珠研磨法加工陶瓷材料耗時費力，而磁性流體法雖省時，但成本高。本研究以實驗室所開發之超精密滾珠研磨加工機，來探討主軸轉速、磨粒粒徑、加工負荷、浮環及固定環材質等等加工條件對球研磨特性之影響。尋找此加工機之最佳加工條件，以利往後針對產業界大量生產之需求。
實驗結果發現，當主軸轉速、磨粒粒徑以及加工負荷增加時，真球度與表面粗度收斂至一飽和值之速率與磨除率都會增加，但真球度及表面粗度之飽和值都會較高。而在一定的磨粒粒徑和加工負荷之條件下，磨除率與真球度或者與表面粗度之飽和值呈現正比關係，也就是越低之磨除率有較佳之真球度飽和值及表面粗度飽和值。當浮環及固定環材質為工程塑膠時，真球度及表面粗度之飽和值較鋁為佳，但磨除率較鋁為小。
先以鑽石磨盤直接研磨Al2O3陶瓷球，使平均真球度達到飽和值後，再以添加0.5μm之B4C磨粒於研磨液中，配合銅盤進行球研磨加工，Al2O3陶瓷球之最佳真球度可達0.7μm，表面粗度Ra最佳可達0.1μm。

The ceramic ball bearing has been used to exact machine for its good properties such as heat-resistant, corrosion-resisting, and wear-resisting. The old grinding methods of ball bearing spend much time and power. Although the magnetic fluid grinding method economizes time, but cost much money. This study research the effects of spindle speed, grit size, load, and the material of float-ring and fixed-ring on the grinding characteristics by using a new ultra-precision ball grinding machine which developed by our lab. Search the optimum operating conditions of this machine for the requirement of industrial circles.
Experimental results show that the converge rate of the saturated value for the sphericity, surface roughness (Ra), and the removal rate are increased with increasing spindle speed, grit size, or load. The sphericity and surface roughness (Ra) are increased when spindle speed, grit size, or load is increased. The sphericity and surface roughness (Ra) are increased with increasing removal rate in using the same grit size and load. Under a certain operating parameter of grinding process, the mean diameter and removal rate are decreased with increasing grinding time. The sphericity and surface roughness (Ra) are better when using the plastic than the float-ring and fixed ring of aluminum, but its removal rate is lower than aluminum’s.
First, let the average sphericity achieve saturated value by using diamond grind disk to grinding the Al2O3 ceramic ball. Then, the optimum sphericity can achieve 0.7μm and the surface roughness (Ra) can achieve 0.1μm by using the B4C grits of 0.5μm to grinding.

封面....................................................I
論文授權書............................................. II
論文審定書............................................. III
謝誌................................................... IV
總目錄..................................................V
圖目錄..................................................VII
表目錄..................................................XI
符號說明................................................XII
中文摘要................................................XIV
英文摘要............................................... XV
第一章 緒論..............................................1
1.1 研究動機.............................................1
1.2 文獻回顧.............................................2
1.2.1 鋼球研磨...........................................2
1.2.2 陶瓷球研磨.........................................4
1.3 本文重點.............................................7
1.4 本論文架構...........................................7
第二章 設計原理與理論分析................................9
2.1 球研磨加工介紹......................................11
2.1.1 球原料之球型化過程….....................................................11
2.1.2 磨盤與研磨劑......................................13
2.1.3 傳統盤磨式加工機之相關實驗結論....................15
2.2 磁性流體相關實驗結果分析............................17
2.3 設計原理............................................21
2.3.1 球研磨機之真球度瓶頸現象..........................21
2.3.2 高速滑動研磨機制..................................23
2.3.3 量產需求..........................................24
2.4 磨盤模式之運動分析..................................26
2.5 研磨加工機制........................................32
2.5.1 研磨(grinding)....................................32
2.5.2 拋光(polishing)...................................33
第三章 實驗設備及實驗方法...............................34
3.1 實驗設備及量測儀器..................................34
3.1.1 超精密球研磨加工機................................34
3.1.2 量測儀器..........................................41
3.2 實驗條件............................................42
3.3 加工方法............................................43
3.4 實驗步驟............................................46
第四章 實驗結果與實驗討論...............................53
4.1 鋼球研磨............................................53
4.1.1 主軸轉速對研磨特性之影響..........................54
4.1.2 磨粒粒徑對研磨特性之影響..........................67
4.2 陶瓷球研磨..........................................76
4.2.1 研磨負荷對研磨特性之影響..........................76
4.2.2 浮環及固定環材質對研磨特性之影響..................87
4.2.3 以二體及三體研磨陶瓷球之實驗結果..................93
第五章 結論............................................108
參考文獻................................................109

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