在切削加工時，切削液通常提供潤滑、冷卻、及移除切屑等效用。使用微量潤滑(MQL)切削的好處不僅可大幅降低切削液的使用成本亦可符合環保議題，甚至可預期的較傳統濕式切削更有效提供潤滑及冷卻的作用。隨著對微小元件的加工需求提升，微切削加工技術也備受重視，微型工具機因此被發展而出，預期可大幅降低生產成本及節約能源損耗。採用MQL技術可較能防止濕式大量潤滑而造成微型工具機的電子零件損害。因此，本研究是針對微量潤滑在微型工具機上進行微磨削SK3工具鋼的探討，並藉由表面精度、刀具磨耗、及刀具壽命等影響做為探討依據。試圖探討微量潤滑於微磨削之加工機制。
　　研究結果顯示，在本研究中的MQL潤滑條件下，若考慮最佳的工件表面精度，建議的潤滑油流量為1.88 ml/hr及空氣流量為30 l/min。同時在實驗過程中發現，乾式磨削或純噴空氣之乾式磨削時，刀具會有斷刀的情況，且乾式磨削會有工件燒焦的狀況，而MQL磨削則無。此乃使用 MQL不僅可由潤滑效果改善磨削加工摩擦的行為，同時藉由油霧移除磨削過程所產生的切屑，進而比乾式磨削與純噴空氣之乾式磨削更能維持一定水準及較佳的表面精度。實驗結果發現MQL磨削的刀具壽命為乾式磨削的可加工面積的七倍以上。

Cutting fluids are mainly used for cooling, lubricating, and chip removing. The use of minimum/minimal quantity lubrication (MQL) in machining processes not only reduces the cost of cutting fluids but also has the potential to alleviate the environmental impact. In addition, the MQL technique could be a viable choice to decrease the damage to the miniature machines due to the near-dry lubrication. Therefore, the objective of this study is aimed at the mechanical performance of MQL for micro-grinding of SK3 steels based on surface finish and tool life.
In this study, it is observed that tool breaks in dry grinding or air blow grinding, and it is also found that workpiece surface is burned in dry grinding. However, these phenomena are not observed in MQL grinding. The reason is that the use of MQL reduces the friction between the tool and workpiece and improves the chip removal in micro-grinding. The use of MQL in micro-grinding also leads to better surface roughness and the tool life is more than seven times compared to dry grinding. Experimental results show that the best surface finish is achieved in MQL grinding when the use of cutting fluids is 1.88 ml/hr with the air flow rate of 30 l/min among the lubrication conditions in this study.

謝誌 i
目錄 ii
圖目錄 iii
表目錄 vii
摘要 viii
Abstract ix
第一章　緒論 1
1.1 研究背景與動機 1
1.2 研究目的 6
1.3 論文架構 6
第二章 文獻探討 8
2.1 切削液之功用與MQL之緣起 8
2.2 MQL之相關研究 11
第三章 實驗配置與方法 17
3.1 實驗配置 17
3.2 實驗方法 21
第四章 實驗結果與討論 29
4.1 乾式磨削與MQL磨削對工件表面精度之影響 29
4.1.1 乾式磨削與MQL磨削於不同進給之工件表面精度比較 30
4.1.2 乾式磨削與MQL磨削於不同磨削速度之工件表面精度比較 35
4.2不同潤滑條件之MQL磨削於工件表面精度及刀具磨耗的影響 42
4.3乾式磨削與純噴空氣之乾式磨削及MQL磨削之刀具壽命的比較 51
第五章 結論與未來展望 69
5.1結論 69
5.2未來展望 71
參考文獻 73
附錄：實驗設備 78

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