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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 | Ting-Yen Chang | en |
dc.contributor.author | 張廷彥 | zh_TW |
dc.date.accessioned | 2021-06-15T05:42:15Z | - |
dc.date.available | 2012-08-20 | |
dc.date.copyright | 2010-08-20 | |
dc.date.issued | 2010 | |
dc.date.submitted | 2010-08-20 | |
dc.identifier.citation | [1] M. Kunieda, T. Masuzawa, “A Fundamental Study on a Horizontal EDM,” Annals of the CIRP, Vol. 37/1, 1988
[2] T. Masuzawa, J. Tsukamoto and M. Fujino, “Drilling of Deep Microholes by EDM,” Annals of the CIRP, Vol. 38/1, 1989. [3] Z.Y. Yu, K.P. Rajurkar and H. Shen, “High Aspect Ratio and Complex Shaped Blind Micro Holes by Micro EDM,” Annals of CIRP, Vol. 51/1, 2002, pp. 359-362. [4] C. Gao, Z. Liu, “A Study of Ultrasonically Aided Micro-electrical-discharge Machining by the Application of Workpiece Vibration,” Journal of Materials Processing Technology Vol. 139, 2003, pp. 226–228. [5] E. Bamberg, S. Heamawatanachai, “Orbital Electrode Actuation to Improve Efficiency of Drilling Micro-holes by Micro-EDM,” Journal of Materials Processing Technology Vol.209, 2009, pp. 1826-1834. [6] Z. Y. Yu, Y. Zhang, J. Li, J. Luan, F. Zhao, and D. Guo, “High Aspect Ratio Micro-hole Drilling Aided with Ultrasonic Vibration and Planetary Movement of Electrode by Micro-EDM,” Annals of CIRP , Vol.58, 2009, pp. 213-216. [7] K. Masakazu, “Study on Micro Deep Hole Machining by EDM Using Intermittent Jumping,” Proceedings of the School of Engineering of Tokai University, Vol. 40, No.1, 2000, pp. 125-129 [8] S. H. Yeo, M. Murali and H. T. Cheah, “Magnetic Field Assisted Micro Electro-discharge Machining,” Journal of Micromechanics and Microengineering, Vol. 14, 2004, pp. 1526–1529. [9] R. Snoeys and H. Cornelissen, “Correlation Between Electro Discharge Machining Data and Machining Settings,” Annals of the CIRP, Vol. 24/1, 1975, pp. 83-88. [10] C. Cogun, “Computer Aided Evaluation and Control of Electric Discharge Machining by Using Properties of Voltage Pulse Trains,” Proceedings of Research and Technological Developments in Nontraditional Machining, American Society of Mechanical Engineers, Production Engineering Division, Vol. 34, 1988, pp. 237-247. [11] K.P. Rajurkar and W.M. Wang, “A New Model Reference Adaptive Control of EDM,” Annals of the CIRP, Vol.38/1, 1989, pp.183-186. [12] Y. S. Liao and J. C. Woo, “The Effects of Machining Settings on the Behavior of Pulse Trains in the WEDM Process,” Journal of Materials Processing Technology, Vol.71, 1997, pp. 433-439. [13] 蔡汶釧,以放電波形鑑別為控制基礎之微放電加工系統的設計與研製,國立清華大學工程與系統科學所碩士論文,民國九十年六月。 [14] 簡興宗,微線切割放電加工之監視與控制,華梵大學機電工程學系碩士論文,民國九十四年六月。 [15] C.C. Kao, A. J. Shih, “Sub-nanosecond Monitoring of Micro-hole Electrical Discharge Machining Pulses and Modeling of Discharge Ringing,” International Journal of Machine Tools & Manufacture, Vol. 46, 2006, pp. 1996-2008. [16] C.C. Kao, A. J. Shih, “Design and Tuning of a Fuzzy Logic Controller for Micro-hole Electrical Discharge Machining,” Journal of Manufacturing Processes, Vol.10, 2008, pp. 61-73. [17] A. Gangadhar, M. S. Shunmugam and P. K. Philip, “Pulse Train Studies in EDM with Controlled Pulse Relaxation,” International Journal of Machine Tools and Manufacture, Vol. 32, No. 5, 1992, pp. 651-657. [18] 顏木田,線切割式放電加工之適應控制,國立台灣大學機械工程學研究所博士論文,民國八十四年六月。 [19] J. W. Jung, Y. H. Jeong, B. K. Min, and S. J. Lee, “Model-Based Pulse Frequency Control for Micro-EDM Milling Using Real-Time Discharge Pulse Monitoring,” Journal of Manufacturing Science and Engineering, Vol. 130, 2008, 031106 (11pp). [20] 石寶明,微放電加工機之開發與間隙控制之研究,國立雲林科技大學機械工程研究所碩士論文,民國八十八年六月。 [21] Y. S. Liao, S. T. Chen, and C. S. Lin, “Development of a High Precision Tabletop Versatile CNC Wire-EDM for Making Intricate Micro Parts,” Journal of Micromechanics and Microengineering, Vol. 15, No. 2, 2005, pp. 245-253 [22] F. Han, S. Wachi, M. Kunieda, “Improvement of Machining Characteristics of Micro-EDM using Transistor Type Isopulse Generator and Servo Feed Control,” Precision Engineering, Vol. 28, 2004, pp. 378-385. [23] F. Han, Li Chen, D. Yu, X. Zhou, “Basic Study on Pulse Generator for Micro-EDM,” The International Journal of Advanced Manufacturing Technology, Vol. 33, 2007, pp. 474–479. [24] M. T. Yan, Y. P. Lai, “Surface Quality Improvement of Wire-EDM using a Fine-finish Power Supply,” International Journal of Machine Tools & Manufacture, Vol. 47, 2007, pp. 1686-1694. [25] M. T. Yan, Y. T. Liu, “Design, Analysis and Experimental Study of a High-frequency Power Supply for Finish Cut of Wire-EDM,” International Journal of Machine Tools & Manufacture, Vol. 49, 2009, pp. 793-796. [26] M. P. Jahan, Y. S. Wong, and M. Rahman, “A Study on the Quality Micro-hole Machining of Tungsten Carbide by Micro-EDM Process using Transistor and RC-type Pulse Generator,” Journal of Materials Processing Technology, Vol. 209, 2009, pp. 1706-1716. [27] M. Hu, Y. Li, H. Tong, and X. Ma, “A Hybrid Process of Micro EDM and Micro ECM for 3D Micro Structures,” Proceedings of The 16th International Symposium on Electromachining, 2010 , pp.507-511. [28] Y. S. Liao, T. Y. Chang and T. J. Chuang, “An On‐line Monitoring System for Micro Electrical Discharge Machining (Micro‐EDM) Process,” Journal of Micromechanics and Microengineering, Vol. 18, 2008, 035009 (8pp) [29] 林楠盛,放電加工技術之應用理論與實務,機械工業雜誌,民國八十年十月,第257-274頁。 [30] 斎藤長男,図解放電加工のしくみと 100%活用法,三菱電機(株),1979,pp.40-67。 [31] 董珮君,線切割放電加工機之即時監測系統開發,國立台灣大學機械工程學系碩士論文,民國九十五年七月。 [32] 蔡明原,線切割放電加工之放電延遲時間線上分析系統,國立台灣大學機械工程學系碩士論文,民國九十六年七月。 [33] 伍國瑋,線切割放電加工機放電延遲時間之序列分析,國立台灣大學機械工程學系碩士論文,民國九十八年七月。 | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/46852 | - |
dc.description.abstract | 本研究針對電容式微放電電源成功開發了一新型之伺服進給策略。此策略主要採階層式架構,具有粗調節與細調節兩個階層。粗調節部分使用傳統之平均電壓法作為參考訊號,再利用以波形分類為基礎之微放電加工線上監視系統作為細調節控制進給速率之參考依據,細調節部分採用比例控制法,將極間維持在穩定狀況,以提昇放電效率;之後使用直徑300μm之電極進行微放電穿孔與盲孔加工實驗。在厚度1.2mm之鋁合金薄片穿孔加工中,證明使用此系統進行控制,可將傳統定速進給法之加工速率自1.83μm/s提昇至3.72μm/s,約為2倍;形狀精度方面可將孔錐度從3.6°抑制至2.7°;在鋁合金盲孔加工中實際加工深寬比亦可自5提昇至10,為2倍;進給深度為1.5mm時,加工速率可自2.66μm/s提昇至4.31μm/s,為1.6倍;在不銹鋼盲孔加工中可提昇加工深寬比自4.6至8.8,約為1.9倍;進給深度為1.5mm時,加工速率可自0.45μm/s提昇至0.58μm/s,為1.27倍。
另外,本研究針對傳統電容式放電電源之缺點進行了改善,設置一電晶體開關於電容式電路之放電迴路中,並配置適當開關頻率,使電容可在充滿電之狀態下進行放電而不受極間狀態影響,進而提昇放電效率。在定深度鋁合金盲孔加工實驗中證實了此新型電源較傳統之電容式電源在鑽削至深寬比4.6時,時間從1262秒減至837秒(效率提昇34%)。此外,本研究亦針對此新型電源發展比例控制策略,並使用直徑300μm之電極進行微放電穿孔與盲孔實驗。實驗結果顯示,在厚度1.2mm之鋁合金穿孔實驗中,孔錐度可抑制在0.63°;在加工效率方面,在進給深度1.5mm時加工速率可從1.83μm/s提昇至4.36μm/s,約為純電容式放電定速進給策略之2.4倍;在鋁合金盲孔加工中,相較純電容式定速進給策略可將加工深寬比自5提昇至12,為2.4倍;進給深度為1.5mm時,加工速率可自2.66μm/s提昇至4.29μm/s,約為1.6倍;在不銹鋼盲孔加工中亦可將加工深寬比自4.6提昇至10,為2.14倍;進給深度為1.5mm時,加工速率可自0.45μm/s提昇至0.83μm/s,為1.82倍。 | zh_TW |
dc.description.abstract | In this study, a pulse discrimination method of the RC circuit was taken to develop a servo control system of micro-EDM. The main structure of the controlling strategy is a hierarchical type control method composed by coarse and fine control. Average voltage across the resistance Vr, which is usually a control index in conventional Micro-EDM process, is taken properly as a reference signal for coarse controlling purpose. The pulse discriminating system which is an innovative monitor for Micro-EDM was employed in this paper. The composition of pulse type can be analyzed and taken as an index of gap deterioration for fine control, which is based on the proportional control method. During the process, feed rate would be adjusted to a proper speed to maintain a good gap distance for normal discharging. In the experiments of micro-EDM through holes drilling with an electrode of 300μm diameter and a 6061 aluminum alloy specimen, which is 1.2mm thick, the drilling velocity can be enhanced from 1.83μm/s to 3.72μm/s, which is 2 times faster comparing with RC constant feed strategy. The taper angle can be reduced from 3.6° to 2.7°. In blind holes drilling, the aspect ratio can be increased from 5 to 10 and from 4.6 to 8.8 on a block of 6061 aluminum alloy and SUS304 stainless steel, which is 2 and 1.9 times deeper than RC constant feed strategy, respectively. The drilling velocity can be increased from 2.66μm/s to 4.31μm/s and from 0.45μm/s to 0.58μm/s on a block of 6061 aluminum alloy and SUS304 stainless steel, which is 1.6 and 1.27 times faster than RC constant feed strategy, respectively.
In the other way, a transistor has been put into the discharge part of the RC circuit, instead of the charging part, to improve the efficiency in this study. Under a proper switching frequency, the capacitance can be fully charged without the influence of gap condition and the performance can be enhanced accordingly. In blind holes drilling experiment, this new transistor-RC circuit performs 34% better than a traditional RC circuit, which takes 837 and 1262 seconds, respectively, when drilling aspect ratio is at 4.6. The proportional control strategy has also been developed with this new power circuit, and an electrode of 300μm diameter was adopted in both through and blind holes drilling experiments. The taper angle can be reduced to 0.63° in through holes drilling, and the drilling velocity can be enhanced from 1.83μm/s to 4.36μm/s, which is 2.4 times faster comparing with RC constant feed strategy. In blind holes drilling, the aspect ratio can be increased from 5 to 12 and from 4.6 to 10 on a block of 6061 aluminum alloy and SUS304 stainless steel, which is 2.4 and 2.14 times deeper than RC constant feed strategy, respectively. The drilling velocity can be increased from 2.66μm/s to 4.29μm/s and from 0.45μm/s to 0.83μm/s on a block of 6061 aluminum alloy and SUS304 stainless steel, which is 1.6 and 1.82 times faster than RC constant feed strategy, respectively. | en |
dc.description.provenance | Made available in DSpace on 2021-06-15T05:42:15Z (GMT). No. of bitstreams: 1 ntu-99-D95522025-1.pdf: 3647065 bytes, checksum: 00f617c4d091f56f030ec15b74d2b5cd (MD5) Previous issue date: 2010 | en |
dc.description.tableofcontents | 摘要 I
Abstract III 目錄 V 圖目錄 VII 表目錄 IX 符號說明 X 第一章 緒論 1 1.1 研究動機 1 1.2 文獻回顧 3 1.3 研究目的 8 1.4 本文架構 9 第二章 放電加工原理 10 2.1 放電加工原理簡介 10 2.2 材料去除機制 11 2.3 放電的轉換過程 13 2.4 放電火花之結構 15 2.5 放電迴路的種類 17 2.6 放電加工參數 20 2.7 放電加工液 23 第三章 微放電精密微動平台之開發 24 3.1 微動三軸平台 24 3.2 各部機構開發 25 3.2.1 加工主軸機構 25 3.2.2 加工槽及其他週邊 26 3.3 控制器之開發 28 3.3.1 硬體部分 28 3.3.2 軟體部分 29 3.4 微放電功能之開發 30 3.5 其他實驗設備 32 第四章 微放電伺服進給控制策略之開發與實驗 35 4.1 微放電波形分類與其意義 35 4.2 伺服進給控制策略之研擬與實踐 39 4.3 微放電實驗原則之規劃 42 4.4 決定進給速率之實驗 44 4.5 微放電穿孔實驗 46 4.6 微放電盲孔實驗 49 4.7 小結 54 第五章 微放電電源效率之改善 55 5.1 傳統微放電電源迴路簡介 55 5.2 新型電晶體控制電容式電源迴路之開發 58 5.3 電晶體開關頻率之選用 63 5.4 新型與傳統電晶體控制電容式放電迴路加工效率之比較 65 5.5 小結 68 第六章 新型放電迴路之伺服進給策略開發與實驗 69 6.1 不同進給速率下之電晶體最佳開關頻率 69 6.2 伺服進給控制策略 72 6.3 微放電穿孔實驗 74 6.4 微放電盲孔實驗 78 6.5 小結 83 第七章 結論與未來展望 84 7.1 結論 84 7.2 未來展望 86 參考文獻 87 作者簡歷 91 | |
dc.language.iso | zh-TW | |
dc.title | 微放電加工效率與能力提昇之研究 | zh_TW |
dc.title | Studies on Improvements for Efficiency and Capability of Micro-EDM Process | en |
dc.type | Thesis | |
dc.date.schoolyear | 98-2 | |
dc.description.degree | 博士 | |
dc.contributor.oralexamcommittee | 傅光華,許文政,卓漢明,鍾雅健,顏木田 | |
dc.subject.keyword | 電容式放電迴路,波形分類,階層式控制,電晶體控制電容式放電迴路, | zh_TW |
dc.subject.keyword | RC circuit,pulse discriminating,hierarchical control,transistor-RC circuit, | en |
dc.relation.page | 91 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2010-08-20 | |
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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