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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 廖運炫 | |
dc.contributor.author | Pei-Shan Wu | en |
dc.contributor.author | 巫佩珊 | zh_TW |
dc.date.accessioned | 2021-06-15T05:50:39Z | - |
dc.date.available | 2010-08-19 | |
dc.date.copyright | 2010-08-19 | |
dc.date.issued | 2010 | |
dc.date.submitted | 2010-08-18 | |
dc.identifier.citation | 參考文獻
1. K.P. Rajurkar and S.M. Pandit, Formation and ejection of EDM debris, Transactions of the ASME, 108 (2) (1988), pp. 22–26. 2. T. Masuzawa, X. Cui and N. Taniguchi, Improved jet flushing for EDM, Annals of the CIRP, 41 (1992), pp. 239–242. 3. H.E.De Bruijn, T.H.Delft and A.J.Pekelaring, Effect of a magnetic field on the gap cleaning in EDM, Annals of the CIRP, 27 (1) (1978) 93-95. 4. Y.C. Lin and H.S. Lee, Machining characteristics of magnetic force-assisted EDM, International Journal of Machine Tools and Manufacture, 48 (11) (2008) 1179-1186. 5. K.P. Rajukar and G.F. Royo, Improvement in EDM performance by R.F. control and orbital motion, American Society of Mechanical Engineers, 34 (1989) 51-62. 6. V.S.R. Murti and P.K.Philip, Comparative analysis of machining characteristics in ultrasonic assisted EDM by the response surface methodology, International Journal of Production Research, 25 (2) (1987) 259-272. 7. V.S.R. Murti and P.K.Philip, An analysis of the debris in ultrasonic-assisted electrical discharge machining, Wear, 117 (1987) 241-250. 8. S. Enache, C. Opran, CI Stoica and E. Strajescu, The study of EDM with forced vibration of tool-electrode, Annals of the CIRP, 39 (1) (1999) 167-170. 9. B.H. Yan and M.D. Chen, Effect of ultrasonic vibration on electrical discharge machining characteristic of Ti-6Al-4V alloy, Journal of Japan Institute of Light Metal, 44 (5) (1993) 281-285. 10. J. Zhixin, Z. Jianhua and A. Xing, Ultrasonic vibration pulse electro-discharge machining of holes in engineering ceramics, Journal of Materials Processing Technology, 53 (1995) 811-816. 11. S.L. Chen, F.Y. Huang, Y. Suzuki and B.H. Yan, Improvement of material removal rate of Ti-6Al-4V alloy by electrical discharge machining with multiple ultrasonic vibration, Journal of Japan Institute of Light Metals, 47 (4) (1997) 220-225. 12. Y.C. Lin, B.H. Yan and Y.S. Chang, Machining characteristics of titanium alloy (Ti-6Al-4V) using combination process of EDM with USM, Journal of Materials Processing Technology, 104 (2000) 171-177. 13. J.S. Soni and G. Chakraverti, Machining characteristics of titanium with rotary electro-discharge machining , Wear, 171 (1994) 51-58. 14. Y.H. Guu and H. Hocheng, Effects of workpiece rotation on machinability during electrical discharge machining, Materials and Manufacturing Processes, 16 (1) (2001) 91-101. 15. Y. Kaneko, H. Yamada, T. Toyohaga and K. Shoda, Performance of linear motor equipped die-sinking EDM, International Journal of Electrical Machining, 5 (2000) 59-64. 16. SODICK’s US Patent no.:US 6,459,063 B1. 17. SODICK’s US Patent no.:US 6,353,199 B1. 18. M.F. Hsieh, C.J. Tung, W.S. Yao, M.C. Wu and Y.S. Liao, Servo Design of a vertical axis drive using dual linear motors for high speed electric discharge machining, International Journal of Machining Tools & Manufacture,47 (2007) 546-554. 19. Albert W.J. Hsue and C.H. Chung, Member, Control strategy for high speed electrical discharge machining (die-sinking EDM) equipped with linear motors, CSME, (2009) 14-17. 20. S. Cetin, A. Okada and Y. Uno, Electrode jump motion in linear motor equipped die-sinking EDM, Journal of Manufacturing Science and Engineering, 125 (2003) 809-815. 21. 董景瑞,雕模放電加工之排渣模式及其波列分析與應用,國立台灣大學機械工程學研究所博士論文,民國九十五年七月。 22. T. Kaneko and M. Tsuchiya, Observation of behavior of machining products in die-sinking EDM by using high-speed VTR, International Journal of Electrical Machining, 2 (1997) 37-42. 23. A. Okada, Y. Uno, S. Onoda and S. Habib, Computational fluid dynamics analysis of working fluid flow and debris movement in wire EDMed kerf, CIRP Annals ─ Manufacturing Technology, 58 (2009) 209-212. 24. S. Cetin, A. Okada, and Y. Uno, Effect of debris distribution on wall concavity in deep-hole EDM, JSME International Journal, 47 (2) (2004) 809-815. 25. D. DiBitonto, P. T. Eubank, M. R. Patel and M. A. Barrufet, Theoretical models of the electrical discharge machining process. I. A simple cathode erosion model, J. Appl, Phys, l66 (1989) 4095-4103. 26. D. DiBitonto, P.T. Eubank, M.R. Patel and M.A. Barrufet, Theoretical models of the electrical discharge machining process. II. The anode erosion model, J.Appl, Phys, l66 (1989) 4104-4111. 27. P.T. Eubank, M.R. Patel and M.A. Barrufet, Theoretical models of the electrical discharge machining process. III. The variable mass, Cylindrical Plasma Models, J. Appl, Phys, 73 (1993) 7900-7905. 28. 余永平,線切割放電加工材料之能量性質及其應用,台灣大學機械工程研究所博士論文,民國九十年。 29. 絲國一,線性步進、伺服馬達原理及其應用,機械工業雜誌,民國八十九年, 253-263。 30. 劉文達,線型與轉動永磁同步伺服馬達之參數自動調適,國立台灣科技大學電機研究所碩士論文,民國八十九年。 31. 劉志豪,應用模糊控制於線型永磁式同步伺服馬達速度及定位控制器參數之調適,國立台灣科技大學電機研究所碩士論文,民國九十年。 | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/47201 | - |
dc.description.abstract | 雕模放電加工(EDM)中加工渣粒在間隙中的分佈與流動是影響加工速度與加工精度的重要因素,因此排渣模式的建立對於加工的穩定性以及效率的提升有很大的助益。本研究針對電極排渣跳躍運動的模式作探討,企圖找到電極跳躍高度以及運動速度對間隙中渣粒和加工油流體流動的影響,進而推論出利於深孔加工進行的電極跳躍模式。本研究先建立流體力學模型分析方型電極在抬升時,運動速度對渣流體流動的影響。實驗上使用線性馬達平台讓電極作高速跳躍運動,搭配架設高速攝影機之觀測系統,觀察渣粒流體在間隙中流動的狀況。經由分析發現,電極運動速度太大時,會讓底部區的流體壓力低於其蒸氣壓,液體開始變成氣體,使得流體內有氣泡產生。透過觀測系統觀察知道方型電極於深寬比為10的深孔加工,當電極跳躍高度為20mm,運動速度為200mm/s時開始明顯有氣泡產生,相對地深寬比為2.5的淺加工並無觀察到此種現象發生。此外,電極跳躍高度大於加工深度的1/4時,可以觀察到渣粒排除的效果產生。因此在進行方型深孔加工時,使用大的跳躍高度搭配接近氣泡產生的臨界運動速度,可以得到較好的渣排除效果,若是想要減少非加工的時間,可以將電極下壓時的速度增加,減少電極跳躍的時間,但同時仍能保持渣排除的效果。在薄型電極深孔加工的狀況下,電極以高速抬起時並未見到有氣泡的產生,且加工孔狹窄,排渣不易,需要搭配大於1/2加工深度的跳躍高度及300mm/s的運動速度,才能達到排除渣粒的效果。 | zh_TW |
dc.description.abstract | Debris distribution and dielectric fluid flow within the machining gap in electrical discharge machining (EDM) are important factors related to stable and precision machining. Hence understanding of the debris removal process is essential in improving EDM process. In this research, electrode jump motion with different jump heights and speeds was investigated to comprehend its effect on the fluid flow and debris-fluid interaction. A simplified fluid dynamics model characterizing the motion of the square shape electrode was established to study theoretically the effect of electrode jump speed on the debris-fluid flow. A setup to realize the electrode motion was designed. The Z-axis equipped with a linear motor was used to provide high speed jump function. The flow images were recorded by a high-speed camera, and the flow of the debris inside the hole was captured for analysis. Analytical results show that the fluid pressure at the bottom region of the electrode would reduce with the increase of electrode jump speed. Bubbles are generated once this pressure falls below the vapor pressure of the fluid. For the square shape electrode, it is found from the experiment that bubbles are prone to occur when the machining depth is increased. The result also shows that debris can be excluded easier when the electrode jump height is larger than 1/4 machining depth. Furthermore, using a large jump height incorporated with an electrode jump speed near the critical speed of bubble generation results in the most effective debris removal. On the other hand, the flow field of a high aspect ratio thin and flat electrode is different from that of the square electrode. There is no bubble generated during high-speed jump motion. The findings of this paper can be taken as the basis for choosing appropriate parameters of electrode jump motion in EDM deep-hole drilling. | en |
dc.description.provenance | Made available in DSpace on 2021-06-15T05:50:39Z (GMT). No. of bitstreams: 1 ntu-99-R96522733-1.pdf: 2923651 bytes, checksum: e36a7fa97ba5738db3eb2685246b3b40 (MD5) Previous issue date: 2010 | en |
dc.description.tableofcontents | 目 錄
中文摘要 I 英文摘要 II 目錄 III 圖目錄 VI 表目錄 X 符號說明 XI 第一章 緒論 1 1.1 引言 1 1.2 文獻回顧 2 1.3 問題陳述與研究目的 6 1.4 本文架構 10 第二章 相關理論 11 2.1 放電加工原理 11 2.1.1 放電加工過程 11 2.1.2 放電火花結構及電力轉換過程 13 2.2 雕模放電加工機系統 16 2.2.1 CNC 控制系統 16 2.2.2 機台與其驅動系統 17 2.2.3 加工液循環供應系統 18 2.3 各種輔助排渣方法簡介 19 2.4 線性馬達工作原理與應用 25 2.4.1 線性馬達的特點 25 2.4.2線性馬達結構及驅動原理 26 第三章 雕模放電加工渣排除模擬觀測系統之架設 29 3.1主硬體架構各部系統 30 3.1.1 單軸平台控制系統 30 3.1.2 配重機構設計 31 3.1.3 影像觀測系統 33 3.2 軟體架構各部系統 34 3.2.1 驅動器控制介面 34 3.2.2 高速攝影機操作軟體 37 3.3加工及精密組裝 38 3.4輔助實驗設備與材料 39 第四章 實驗結果與討論 43 4.1電極抬升階段渣粒流體流場分析 43 4.2 方形電極之雕模放電加工渣排除觀測 47 4.2.1 實驗設備 47 4.2.2 實驗規劃 49 4.2.3 電極抬升階段現象比較 51 4.2.4 電極做一次跳躍運動之比較 55 4.2.5 方型電極跳躍排渣現象之討論 64 4.3 薄型電極之雕模放電加工渣排除觀測 69 4.3.1 實驗設備 69 4.3.2 實驗規劃 70 4.3.3 電極抬升階段現象比較 71 4.3.4 薄型電極跳躍運動綜合比較 73 4.3.4 薄型電極跳躍運動現象比較結論 77 第五章 結論與未來展望 78 5.1 結論 78 5.2 未來展望 80 參考文獻 81 | |
dc.language.iso | zh-TW | |
dc.title | 高深寬比雕模放電加工渣排除效果之研究 | zh_TW |
dc.title | Study of debris exclusion effect in a high aspect ratio cavity fabricated by die-sinking EDM | en |
dc.type | Thesis | |
dc.date.schoolyear | 98-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 蔡曜陽,董景瑞 | |
dc.subject.keyword | 放電加工,排渣模式,排渣跳躍運動,氣泡, | zh_TW |
dc.subject.keyword | Electrical Discharge Machining (EDM),debris flushing model,deep-hole machining,bubble, | en |
dc.relation.page | 84 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2010-08-18 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 機械工程學研究所 | zh_TW |
顯示於系所單位: | 機械工程學系 |
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