臺灣博碩士論文加值系統

本研究目的在探討使用小直徑鑽石磨棒高速粗磨削與細磨削氧化鋁陶瓷，分析磨削條件對鑽石磨耗、磨削力與表面粗糙度的影響，實驗分成四部分: (1)電鑄鑽石和金屬燒結鑽石的磨棒，鑽石粒號為#270/325，使用工具顯微鏡和SEM觀察磨削過程中，磨棒鑽石磨耗情況，將磨削前後之鑽石顆粒磨耗種類量化，並探討磨削正向力及工件表面粗糙度等。實驗結果以燒結鑽石磨棒較適於長時間磨削氧化鋁陶瓷，相對地，電鑄鑽石磨棒在較低進給與較低主軸轉速下用於較短時間磨削。(2)粗磨部份，用金屬燒結鑽石磨棒，鑽石粒號為#80/100，以較低主軸轉速10,000rpm的條件，所得磨削比較高為2452，材料去除效率較高；反之，在較高主軸轉速30,000rpm時，磨削比較低為503，材料去除效率較低。(3)細磨削時，用鑽石粒號#1000的金屬燒結鑽石磨棒，以高主軸轉速50,000rpm，低切深1μm，所得工件表面粗糙度為Ra 0.33μm。(4)使用壓力磨削方式，可得到更佳的氧化鋁陶瓷表面粗糙度Ra 0.23μm，其比高速細磨削者能得到較佳的表面粗糙度，可用於粗磨後的精修。

The purpose of the paper was to investigate the rough grinding and fine grinding of alumina ceramic using small diameter of diamond tools under high spindle speed. The effect of the grinding conditions on diamond wear, grinding forces, and surface roughness was discussed. The four types of experiments were carried out: (1) the electroplated diamond tool and metal sintered diamond tool with grit mesh of #270/325 were used to grind alumina. Toolmaker microscope and SEM were used to observe the diamond wear conditions after and before grinding and calculate their wear proportions. Besides, the grinding force and the workpiece surface roughness obtained displayed a moderate long time of grinding alumina for the metal sintered diamond tool. Relatively, the electroplated tool can be used to grind the alumina under a relatively lower feed and spindle speed for a short periods. (2) For rough grinding of alumina, when a metal sintered diamond tool of grit mesh #80/100 under a lower spindle speed of 10000 rpm was used, the relatively higher grinding ratio of 2452 and the higher material removal efficiency were obtained. Oppositely, for a higher spindle speed of 30000 rpm, the lower grinding ratio of 503 and the lower material removal efficiency were produced. (3) For fine grinding of alumina, when the metal sintered diamond tool of grit mesh #1000 under a higher spindle speed of 50000 rpm and a lower depth of cut of 1μm was employed, the resulting better surface roughness obtained was Ra 0.33 μm. (4) The pressure grinding of alumina was used to obtain a better surface roughness of Ra 0.23μm than the high speed fine grinding. Hence, it can be used as an ultra finishing after rough grinding.

目錄
致謝 I
摘要 II
目錄 IV
表錄 VI
圖錄 VIII
第一章 緒論 1
1.1 研究動機 1
1.2文獻回顧 2
1.3 研究目的 7
1.4 本文內容 8
第二章 理論基礎 9
2.1 磨削加工原理 9
2.1-1 磨粒加工 9
2.1-2 硬脆材料受壓印的特性 12
2.1-3 脆性材料磨削情況 14
2.1-4鑽石磨棒工具磨削中切刃之變化 17
2.2 磨削模式 19
2.3 鑽石的種類 21
2.4陶瓷材料特性 24
第三章 實驗程序與設備 25
3.1磨削加工實驗之架構與流程 25
3.2 分析儀器及設備 32
第四章 實驗結果與討論 40
4.1磨棒型態 40
4.1-1磨削力 40
4.1-2 工件表面粗糙度分析 45
4.1-3 鑽石工具磨耗情形 50
4.2 粗磨用金屬燒結鑽石磨棒對氧化鋁陶瓷之影響 54
4.2-1 進給對磨削力之影響 54
4.2-2進給對表面粗糙度之影響 58
4.2-3 耐磨試驗 74
4.3 細磨用金屬燒結鑽石磨棒對氧化鋁陶瓷之影響 81
4.3-1轉速及切深對磨削力與表面粗糙度之影響 81
4.3-2壓力磨削對氧化鋁陶瓷粗糙度之影響 87
第五章 結論 94
參考文獻 96

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