本研究使用自行研製之高精度靜態放電試驗機，以鎢針為負極，白金為輔助正極，玻璃試片為被加工件， KOH(aq) 30wt%為電解液，並依據前導實驗結果，設定電極之沒入深度1mm，探討電極幾何形狀與尺寸、供應電壓與加工間隙對放電加工特性及加工後之試片表面損傷大小之影響。
依據加工過程中電流波形與氣泡生成之變化，建立出不同電極幾何形狀與尺寸之電化學放電加工I-V曲線圖，將此I-V曲線圖細分成三個區域探討，區域I：非加工區，區域II：輝光放電區，區域III：火花放電區。藉由實驗後之玻璃試片SEM照片得知隨著供應電壓增加，試片表面損傷外徑也隨之擴大，且提升加工間隙會使損傷外徑減小。

A static electrochemical discharge machining (ECDM) tester, where the tungsten needle is used as the cathode and the platinum as the anode and the glass as the specimen, and the depth of electrode is set to be 1mm in the aqueous electrolyte of 30wt% KOH at the test time of 10s, is employed to investigate the influence of geometry and size of the electrode, supply voltage and gap on the characteristic of electrochemical discharge machining.
According to the current/voltage measurements combined with the photographs of the bubble layer on the cathode and the behavior of discharge under different geometry and size of the electrode during the ECDM process, three regimes have been identified as: (I): non-machining. (II): glow discharge. (III): spark discharge. From the observation on the surface of machined glass specimen by using SEM, the experimental result show that damage of the glass increases with the increase of supply voltage.

封面 I
學位論文審定書 II
謝誌 III
總目錄 IV
圖目錄 VII
表目錄 XI
中文摘要 XII
英文摘要 XIII
第一章 緒論 1
1-1 研究動機 1
1-2 文獻回顧 2
1-2-1 導體材料加工之相關文獻 2
1-2-2 非導體材料加工之相關文獻 5
1-2-3 氣泡生成之相關文獻 7
1-3 本文重點 9
第二章 基本原理 10
2-1 一般放電加工基本原理 10
2-2 電化學放電加工基本原理 14
2-2-1 電化學反應 14
2-2-2 放電加工反應 15
2-3 電化學放電加工與放電加工之比較 17
第三章 實驗設備及實驗方法 18
3-1 實驗設備 18
3-1-1 高精度靜態放電試驗機 18
3-1-2 高精度靜態放電試驗機系統 21
3-1-3 實驗訊號量測設備與資料蒐集分析 22
3-1-4 微米級精度之間隙控制系統 24
3-2 實驗試片之材料特性與幾何形狀 27
3-2-1 鎢針與玻璃之材料特性與幾何形狀 27
3-2-2 電解液、輔助電極與加工槽 29
3-3 試片處理 33
3-3-1 鎢針試片 33
3-3-2 玻璃試片 33
3-4 實驗條件設定 34
3-5 實驗步驟 35
3-5-1 KOH水溶液之調配 35
3-5-2 試片間接觸與非接觸之判斷 35
3-5-3 間隙之調整 35
第四章 結果與討論 42
4-1 電極沒入深度對於加工損傷之影響 42
4-1-1 不同沒入深度與電流波形圖 43
4-2 電極幾何尺寸效應 47
4-2-1 電流與力量波形圖以及氣泡生成之變化 48
4-2-2 I-V曲線圖 72
4-3 電壓效應 77
4-3-1 電極幾何尺寸與電解液濃度對臨界電壓之影響 77
4-3-2 電壓效應對於損傷之影響 81
4-3-3 加工間隙對加工損傷之影響 84
第五章 結論 99
參考文獻 101

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