Responsive image
博碩士論文 etd-0704100-224722 詳細資訊
Title page for etd-0704100-224722
論文名稱
Title
高能量束銲接所產生熔區底部鋸齒狀縱深研究
Spiking Phenomenon in High Intensity Beam Welding
系所名稱
Department
畢業學年期
Year, semester
語文別
Language
學位類別
Degree
頁數
Number of pages
65
研究生
Author
指導教授
Advisor
召集委員
Convenor

口試委員
Advisory Committee
口試日期
Date of Exam
2000-06-30
繳交日期
Date of Submission
2000-07-04
關鍵字
Keywords
孔穴、鋸齒狀縱深、聚焦位置、高能量束銲接
Spiking, High-intensity beam welding, cavity, focal location
統計
Statistics
本論文已被瀏覽 5658 次,被下載 6299
The thesis/dissertation has been browsed 5658 times, has been downloaded 6299 times.
中文摘要
本研究探討高能量電子或雷射束銲接過程·入射能量造成工作接合區底部鋸齒狀縱深發生之原因·鋸齒狀縱深乃是相對於熔區平均深度所突然增加之底部縱深·熔液因不能及時填入鋸齒狀根部﹐因而極易產生氣孔·縱使熔液能夠填入鋸齒狀根部﹐快速之冷卻使熔液不及與壁完全結合﹐而產生如鑄造過之冷隙現象·此類銲件瑕疵嚴重造成接合品質之欠佳·高能量束銲接所產生之空穴﹐因入射能量鏡面反射強烈影響熔區底部之能量吸收﹐因此探討能量束特性對週期性鋸齒狀縱深之效應極為重要·此外﹐當入射能量之焦距與空穴底部深度呈相對振盪﹐熔區底部承受入射能量之區域﹐瞬間由最寬至零﹐反之亦然﹐熔區底部之能量吸收因而產生數百倍之變化﹐造成極明顯之週期熔化·本實驗因此考慮吸收能量與能量焦點之關係﹐結合輸送現象理論﹐建立模式﹐以預測週期性鋸齒狀縱深發生之原因·理論結果將與實驗相印証.
Abstract
Spiking representing a periodic melting and solidification in the depth of fusion zone during high-intensity beam welding is experimentally and theorectically investigated in this work . A spike is a sudden increase in penetration beyond what might be called the average penetration line. Many spikes have voids in their lower portions because molten metal does not fuse to the sides of the hole, producing a condition similar to a cold shut in a casting. These defects seriously reduce the strength of the joint. Due to the significant role of specular reflection on absorption, an investigation of the beam characteristics, especially the focal location, on spiking is important. Furthermore, as the cavity base oscillates upward and downward relatively from the focal location, a central region subject to direct irradiation changes instantaneously from maximum to zero and vice versa. This leads to several hundred time difference in energy absorption and strongly periodic melting at the cavity base. Physical phenomenon of spiking is obtained by comparing between the measured and predicted data based on scale anlaysis of transport process near the cavity base and energy absorption as a function of focal location.
目次 Table of Contents
一、 前言------------------------------------------------------------------------2
二、 實驗方法------------------------------------------------------------------7
1、 實驗儀器--------------------------------------------------------------7
2、 實驗步驟--------------------------------------------------------------8
3、 實驗結果-------------------------------------------------------------13
三、 理論分析-----------------------------------------------------------------38
四、 結果與討論--------------------------------------------------------------46
五、 參考資料-----------------------------------------------------------------47
參考文獻 References
. W. H. Giedt, A Periodoc Melting Model of High Intensity, Mechanical, Aeronautical, & Materials Engineering University of California Davis, CA 95616.
2. G. K. Hicken, W. H. Giedt and A. E. Bentley, Correlation
of Joint Penetration With Electron Beam Current Distribution, Welding Research, (1991), 69-75.
3. W. H. Giedt, Prediction of Electron Beam Welding Depth of
Penetration, Consultant Joining Model Labs Division Sandia National Laboratories Livermore, SAND86-8205 (1986), 3/4-24
4. Susumu Tsukamoto and Hirosada Irie, Melting Process and
Spiking Phenomenon in Electron Beam, Transactions of Japan Welding Society, Vol24, No.1,April (1993), 10-15.
5. Susumu Tsukamoto and Hirosada Irie, Effect of Molten
Metal Behavior on Melting Process in Electron Beam Welding, 日本溶接學會論文集, Vol9, No.3 (1991), 348-354.



6. H. Tong and W. H. Giedt, A Dynamic Interpretation of
Electron Beam Welding, Welding Research Supplement, June (1970) 259-267.
7. C. M. Weber, E. R. Funk and R. C. Mcmaster, Penetration
Mechanism of Partial Penetration Electron Beam Welding, Welding Research Supplement, February (1972) 90-94.
8. P. Tews, P. Pence, J. Sanders, E. R. Funk and R. C. Mcmaster,
Electron Beam Welding Spike Suppression Using Feedback Control, Welding Research Supplement, February (1976) 52-55.
9. R. E. Armstrong, Control of Spiking in Partial Penetration
Electron Beam Welds, Welding Research Supplement, August (1970) 382-388.
10. G. L. Mara, E. R. Funk, R. C. Mcmaster and P. E. Pence,
Penetration Mechanisms of Electron Beam Welding and the Spiking Phenomenon, Welding Research Supplement, June (1974) 246-251.
11. T. P. Obrien, P. E. Pence, E. R. Funk and R. C. Mcmaster,
Welding Research Supplement, August (1974) 332-338.


12. Henry Tong and Warren H. Giedt, Radiographs of the Electron
Beam Welding Cavity , The Review of Scientific Instruments, Vol40 NO.10 (1969) 1283-1285.
13. O. K. Nazarenko, et al. Periodical Transfer of Metal in
Electron Beam Welding, Avt. Svarka, No.8 (1973) 75-76.
14. Academician N. N. Rykalin, A. A. Uglov, I. V. Zuev, V. V.
Ivanov, and V. I. Koren`kov, Liquid Phase Motion in the Filling of a Cylindrical Channel, American Institute of Physics, Vol.21, No.9, (1976) 488-489.
15. Helmut Schwarz, Electron Beam Processes at Different
Voltages, Hamilton Standard, Division of United Aircraft Corporation, Windsor Locks, Connecticut, U.S.A. 699-707.
16. Helmut Schwarz, Power Density of Optimally Focused Space
Charge Limited Electron Beams, Journal of Applied Physics Vol.33 No.12, (1962) 3464-3470.
17. Helmut Schwarz, Mechanism of High Power Density Electron
Beam Penetration in Metal, Journal of Applied Physics, Vol.35 No.7, (1964) 2020-2029.

18. D. A. Schauer, W. H. Giedt and S. M. Shintaku, Electron Beam
Welding Cavity Temperature Distributions in Pure Metals and Alloy, Welding Research, (1978) 127-133.
19. D. A. Schauer and W. H. Giedt, Prediction of Electron Beam
Welding Spiking Tendency, (1978) 189-195.
20. VM YAZOVSKIKH and V Ya BELEN`KII, Effect of Beam Current
on its Focusing in Electron Beam Welding, Welding Production October, No.10, (1984) 34-35.
21. 古錦松, 淺談電子束銲接, 銲接與切割, 第八卷第五期, 民國
87年9月 40-45.
22. V A VINOGRADOV and A I PAVLOVSKII, A System for Stabillsing
Beam Focusing in Electron Beam Welding, Welding Production September, No.9, (1983) 27-28.
23. Dipl.-lng. Franticek Kolenic and Dipl.-lng. Miroslav
Kosecek, Bratislava/Czechoslovakia, The Influence of Electron Beam Focusing on the Shape and Depth of the Weld, Welding and Cutting, (1992) 24-26.


24. G. Thomas, V, Ramachandra, K. V. Nagarajan, B. Pant, B. K.
Sarkar and R. Vasudevan, Electron Beam Welding Studies of 25mm Thick Ti-6Al-4V Sections, Welding Research Supplement, (1989) 336-341.
25. Yoshiaki Arata, Michio Tomie, Nobuyuki Abe and Xiang-Yu
Yao, Observation of Molten Metal Flow During EB Welding, Transactions of JWRI, Vol.16 No.1, (1987) 13-16.
26. Yoshiaki Arata, Michio Tomie, Nobuyuki Abe and Xiang-Yu
Yao, Mechanical Properties of Electron Beam Welding of Heavy Section Steel Plates, Transactions of JWRI, Vol.12 No.2, (1983) 103-110.
27. Yoshiaki Arata, Michio Tomie, 100KW Class Electron Beam
Welding Technology, Transactions of JWRI, Vol.9 No.2, (1980) 15-24.
28. Yoshiaki Arata, Michio Tomie, Nobuyuki Abe and Xiang-Yu,
Tandem Electron Beam Welding Control of Molten Metal Flow, Transactions of JWRI, Vol.17 No.2, (1988) 19-23.


29. Fukuhisa Matsuda and Seiji Katayama, Vaporization of Mn
Element in Electron Beam Weld Metals of Fe-Mn Binary Steels, Transactions of JWRI, Vol.12 No.1, (1983) 149-152.
30. J. W. Elmer, W. H. Giedt and T. W. Eagar, The Transition
From Shallow to Deep Penetration During Electron Beam Welding, Welding Research, (1990) 167-176.
31. P. J. Alberry, Sensitivity Analysis of Half-Bead and
Alternative GTAW Techniques, Welding Research Supplement, (1989) 442-451.
32. R. D. Dixon, An Accurate Method for Determining Electron
Beam Welding Voltages, Welding Research Supplement, (1973) 343-346.
33. D. D. Kautz, D. L. Olson, P. Burgardt and G. R. Edwards,
A Characterization of Pulsed Electron Beam Welding Parameters, Welding Research Supplement, (1991) 100-105.
34. W. H. Giedt and L. N. Tallerico, Prediction of Electron Beam
Depth of penetration, Welding Research Supplement, (1988) 299-305.
電子全文 Fulltext
本電子全文僅授權使用者為學術研究之目的,進行個人非營利性質之檢索、閱讀、列印。請遵守中華民國著作權法之相關規定,切勿任意重製、散佈、改作、轉貼、播送,以免觸法。
論文使用權限 Thesis access permission:校內校外完全公開 unrestricted
開放時間 Available:
校內 Campus: 已公開 available
校外 Off-campus: 已公開 available


紙本論文 Printed copies
紙本論文的公開資訊在102學年度以後相對較為完整。如果需要查詢101學年度以前的紙本論文公開資訊,請聯繫圖資處紙本論文服務櫃台。如有不便之處敬請見諒。
開放時間 available 已公開 available

QR Code