電化學放電加工應用於石英玻璃之研究與分析｜國立中央大學博碩士論文系統

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研究生：	林愈森 Yu-sen Lin
論文名稱：	電化學放電加工應用於石英玻璃之研究與分析 The Study of Drilling on Quartz by Electrochemical Discharge Machining
指導教授：	洪勵吾
口試委員:
學位類別：	碩士 Master
系所名稱：	工學院 - 機械工程學系 Department of Mechanical Engineering
畢業學年度：	99
語文別：	中文
論文頁數：	90
中文關鍵詞：	石英玻璃、電化學放電加工
外文關鍵詞：	Quartz, Electrochemical Discharge Machining
相關次數：	點閱：13 下載：0
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隨著微機電系統的發展，光學玻璃與石英等非導電材料的應用遽增，電化學放電加工是非導電硬脆材料加工製程的新興技術，具有相當的發展潛力和高附加價值。
本文採用直徑100μm之碳化鎢作為刀具，氫氧化鉀為電解液，對石英玻璃進行電化學放電加工，以單一因子法分析各加工參數（如：操作電壓、電解液濃度、脈衝頻率、加工能率、電流波形、進給速率）之影響；並利用田口實驗方法分析加工參數（如：操作電壓、電解液濃度、脈衝頻率、加工能率）的相對重要性。
實驗結果顯示，由單一因子法得知，最佳參數偏向於低的操作電壓、低電解液濃度以及較高的脈衝頻率。分析出之結果最佳參數分別為加工電壓40V、加工能率20％、電解液濃度20％、脈衝頻率100 KHz；由田口法得知，操作電壓大小對於加工孔徑影響最大，貢獻率達59.84％；並且以最佳參數進行加工，得到加工孔徑約 166μm。最後本文在電解液內加入肥皂水，成功的減少氣泡膜成長時間，孔徑過切量降至143μm。

The optical materials such as Pyrex and quartz are widely used with enormous potentialities and highly added value. However, the machining of non-conductive brittle materials is remaining as a big concern. The new developed technology, electrochemical discharge machining (ECDM), is a promising process for machining non-conductive brittle materials.
In present thesis quartz is machined by ECDM. A tungsten carbide cylinder with diameter of 100 micro-meters is selected as the electrode tool. KOH is selected as the electrolyte. In this research, the single variable method and Taguchi statistical method are used to analyze the influence of the parameters(such as applied voltage, concentration of electrolyte, pulse frequency, duty, current waveform, tool feeding rate, etc) on the over cut of the drilling and the relative importance among parameters.
From experimental results, it shows that applied voltage has relatively large influence on machining. The optimal parameters are taken for drilling the quartz, and a hole with diameter of about 166 μm is obtained. Finally, it is successful in reducing the gas film thickness when the liquid soap is added to mix with the KOH electrolyte, and the hole with diameter of about 143 μm is obtained.

摘要 ..................................................... I
Abstract ................................................ II
目錄 ................................................... III
表目錄 ................................................. VII
圖目錄 ................................................. VII
符號說明 ................................................. X
第一章 緒論 .............................................. 1
1-1 前言 ............................................. 1
1-2 石英加工簡介 ..................................... 2
1-3 電化學放電加工簡介 ............................... 3
1-4 文獻回顧 ......................................... 5
1-4-1 電化學放電加工機制 ........................... 5
1-4-2 電化學放電加工製程 ........................... 9
1-5 研究目的 ........................................ 10
第 二 章 基本原理 ...................................... 12
2-1 電化學放電加工基本理論 .......................... 12
2-2 火花形成機制…………………………………………………13
2-3 電化學放電反應式……………………………………………15
2-4 電解液導電度…………………………………………………17
2-5 田口實驗計畫法………………………………………………18
2-5-1 參數的種類………………………………………………19
2-5-2 參數設計的配置…………………………………………20
2-5-3 信號雜音比………………………………………………21
2-5-4 變異數分析………………………………………………22
第三章 實驗裝置與步驟 ................................... 25
3-1 實驗設備 ......................................... 25
3-1-1 機台結構設計............................... 25
3-1-2 刀具進給控制系統........................... 25
3-1-3 脈衝式直流電源供應系統..................... 26
3-1-4 連軸器..................................... 26
3-1-5 導電夾具....................................27
3-1-6 示波器與電流探測................................. 27
3-2 實驗材料 ........................................ 27
3-3 實驗步驟及注意事項 .............................. 29
3-4 直交表的建構 .................................... 30
3-4-1 自由度的計算 ............................... 31
3-4-2 標準直交表的選擇 ........................... 32
3-4-3 實驗資料之分析 ............................. 32
3-4-4 變異數分析法（ANOVA） ...................... 33
第四章 結果與討論........................................34
4-1 操作電壓 ........................................ 37
4-2 電解液濃度 ...................................... 39
4-3 脈衝頻率 ........................................ 41
4-4 加工能率(Duty) .................................. 42
4-5 電流波形 ........................................ 44
4-6 加工深度 ........................................ 45
4-7 進給速率 ........................................ 46
4-8 電解液加入介面活性劑（liquid soap） ............. 47
4-9 田口方法 ........................................ 48
4-9-1 ANOVA 與各參數分析 .......................... 49
4-9-2 孔徑最適合化因子水準之組合 ................. 49
第五章 結論 ............................................. 51
5-1 結論 ............................................ 51
5-2 未來展望 ........................................ 52
參考文獻 ................................................ 54
附表 ................................................ 60
附圖 ................................................ 65

                                

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