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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-Chun Tung | en |
dc.contributor.author | 董珮君 | zh_TW |
dc.date.accessioned | 2021-06-13T03:21:48Z | - |
dc.date.available | 2006-07-31 | |
dc.date.copyright | 2006-07-31 | |
dc.date.issued | 2006 | |
dc.date.submitted | 2006-07-28 | |
dc.identifier.citation | [1]R. Snoeys and H. Cornelissen, “Correlation Between Electro Discharge Machining Data and Machining,’’ Annals of the CIRP, Vol.24/1, 1975, pp.83-88.
[2]C. Cogun, “Computer Aided Evaluation and Control of Electric Discharge Machining by Using Properties of Voltage Pulse Trains,’’ International Journal of Machine Tools and Manufacture, Vol. 30, No. 1, 1990, pp. 237-247. [3]D. F. Dauw, R. Snoeys and W. Dekeyser, “Advanced Pulse Discriminating System for EDM Process Analysis and Control,’’ Annals of the CIRP, Vol. 32/2, 1983, pp.541-549. [4]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. [5]H. Watanabe, T. Stato and I. Suzuki, “ WEDM Monitoring with a Statistical Pulse Classification Method, ’’ Annals of the CIRP, Vol. 39/1, 1990, pp.175-178. [6]N. Kinoshita, M. Fukui, H. Shichida and G. Gamo, “Study on E.D.M. with Wire Electrode ; Gap Phenomena,’’ Annals of the CIRP, Vol.25/1, 1976, pp.141-145. [7]吳正仲, 線切割放電加工之波列分析與應用, 博士論文, 國立台灣大學機械工程學研究所, 1996. [8]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,清大工程與系統科學所碩士論文,民國九十年六月。 [9]簡興宗,微線切割放電加工之監視與控制,華梵科技大學機電工程學系碩士論文,民國九十四年六月。 [10]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。 [11]李祥國,WEDM細線加工之放電能量與電流波形探討,台北科技大學電機工程系碩士論文,民國九十三年七月。 [12]http://www.calright.com./uploads/images/regular/301.jpg [13]http://www.pintek.com.tw [14]http://www.elektronikbolaget.se/am503s.html [15]Y.S. Liao, Y.Y. Chu and M.T. Yan, “Study of Wire Breaking Process and Monitoring of WEDM,’’ Int. J. Mach. Tools Manufact, Vol. 37, No. 4, 1997, pp.555-567. | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/31839 | - |
dc.description.abstract | 本論文針對線切割放電加工機開發出一波形即時監測系統,於加工時即時顯示放電延遲時間分佈圖。此系統先將原始間隙電壓、電流波形整為方波,接著由89C52單晶片估算出放電延遲時間後,依放電延遲時間之有無,將放電波形鑑別為正常波與不正常波兩類。此系統除可顯示不正常波百分比與擷取1000次放電所需時間外,尚能由使用者自行決定某特定放電延遲時間長度,並顯示放電延遲時間小於及大於此特定長度之正常波百分比。最後利用本論文開發之系統,觀察線切割放電加工機在不同加工參數下加工時,放電延遲時間的變化趨勢。當進给速率愈快及短路停機前,放電延遲時間分佈圖有向左偏的趨勢;伺服電壓愈高及斷線前,放電延遲時間分佈圖有向右偏的趨勢,這些放電延遲時間的變化趨勢都可以由放電現象得到合理的解釋。 | zh_TW |
dc.description.abstract | A WEDM ignition delay time monitoring system which can display the distribution of the ignition delay time on a real-time basis is developed in this research. The discharge pulse trains of the gap voltage and the gap current in WEDM process are rectified into square waveforms respectively before they are sent into the 89C52 microcontroller, the major component of the system, for data processing. Based on length of the delay time, the discharge pulse is categorized into two groups – the normal discharges and the abnormal discharges. After every 1000 discharges, the distribution of the ignition delay time, the percentages of the normal discharges and abnormal discharges, and the time consumed for 1000 discharges just recorded are displayed instantly on the LCD panel of the system. The normal discharges can be further divided into two sub-groups according to the specific reference ignition delay-time value set by the user. The respective percentages of the two sub-groups are also presented on the LCD panel. To verify the system, the distribution tendency of the delay time is observed under various machining conditions. It shows that the distribution is skew more to the left when the feed rate is increased or before the WEDM machine shut down itself due to frequent occurrence of short circuit discharges. On the other hand, the distribution is skew less to the left when the servo voltage is increased or when the wire breaking is about to take place. Both the tendencies are reasonable and explainable by the physical mechanism of WEDM. | en |
dc.description.provenance | Made available in DSpace on 2021-06-13T03:21:48Z (GMT). No. of bitstreams: 1 ntu-95-R93522801-1.pdf: 1226985 bytes, checksum: 69991a8bcacdcb358ef5cd951a2d03c5 (MD5) Previous issue date: 2006 | en |
dc.description.tableofcontents | 目錄
誌謝 I 中文摘要 II Abstract III 目錄 IV 圖目錄 VI 表目錄 VIII 符號對照表 IX 第一章 緒論 1 1.1 引言 1 1.2 文獻回顧 2 1.3 研究目的與方法 3 1.4 本文結構 5 第二章 放電加工原理介紹 6 2.1 放電加工原理 6 2.1.1 放電加工狀態觀察 6 2.1.2 放電火花之組成 8 2.1.3 放電加工狀態觀察 10 2.2 放電加工放電迴路介紹 12 2.3 放電電源 15 2.3.1 依放電迴路分類 15 2.3.2 依放電控制形式分類 17 2-4 線切割放電加工之特性 19 2-5 WEDM放電電源設計與波形分析 21 2.5.1 雙電源放電迴路 21 2.5.2 交流點火電路 24 第三章 波形監測系統之設計 25 3.1 間隙狀況分類 25 3.2 放電波形觀察 26 3.2.1 觀察設備與材料 26 3.2.2 觀察方法與加工參數設定 30 3.2.3 觀察結果 31 3.3 放電延遲時間即時監測系統 32 3.3.1 放電波形辨識原理 32 3.3.2 波形即時監測系統 33 3.3.3 整形電路 36 3.3.4 統計電路 39 3.4 電路驗證 43 3.4.1 波形實際整形結果 43 3.4.2 統計電路之驗證 44 第四章 放電延遲時間趨勢實驗 46 4.1手動進给實驗結果與討論 47 4.2 伺服進给實驗結果與討論 49 4.3 異常加工狀況實驗結果與討論 51 4.4 實驗結論 53 第五章 結論與未來展望 54 5.1 結論 54 5.2 未來展望 55 參考文獻 56 附錄A 58 | |
dc.language.iso | zh-TW | |
dc.title | 線切割放電加工機之即時監測系統開發 | zh_TW |
dc.title | Development of the Real-Time Monitoring System for WEDM | en |
dc.type | Thesis | |
dc.date.schoolyear | 94-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 鍾雅健,顏木田,蔡曜陽 | |
dc.subject.keyword | 線切割放電加工,放電延遲時間,即時監測系統, | zh_TW |
dc.subject.keyword | WEDM,ignition delay time,real-time monitoring system, | en |
dc.relation.page | 60 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2006-07-30 | |
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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