| Visual sensing of weld pool in variable polarity TIG welding of aluminium alloy |
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| 作者姓名： | 张广军 闫志鸿 吴林 |
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| 作者单位： | State Key Laboratory of AWPT Harbin Inst itute of Technology Harbin 150001 China，State Key Laboratory of AWPT Harbin Inst itute of Technology Harbin 150001 China，State Key Laboratory of AWPT Harbin Inst itute of Technology Harbin 150001 China |
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| 摘 要： | 1 Introduction Real-time measuring of the size of welding pool is the precondition to weld shape control1?4]. Among the researched sensing methods, the passive visual image sensing has been proved to be a feasible and promising method due to its abundan…
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| 关 键 词： | 铝合金 TIG焊接 视觉传感 滤谱器 焊接熔池 |
| 收稿时间： | 2005-07-04 |
| 修稿时间： | 2005-12-12 |
Visual sensing of weld pool in variable polarity TIG welding of aluminium alloy |
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| ZHANG Guang-jun,YAN Zhi-hong,WU Lin.Visual sensing of weld pool in variable polarity TIG welding of aluminium alloy[J].Transactions of Nonferrous Metals Society of China,2006,16(3):522-526. |
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| Authors: | ZHANG Guang-jun YAN Zhi-hong WU Lin |
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| Affiliation: | 1. Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China;2. Key Laboratory for Advanced Materials Processing Technology, Ministry of Education, Tsinghua University, Beijing 100084, China;3. China Academy of Launch Vehicle Technology, Beijing 100076, China;4. State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China;5. Tianjin Long March Launch Vehicle Manufacturing Co., Ltd., Tianjin 300462, China;6. Capital Aerospace Machinery Corporation Limited, Beijing 100076, China;1. Department of Mechanical Engineering, Amrita School of Engineering, Coimbatore, Amrita Vishwa Vidyapeetham, Amrita University, 641112, India;2. Department of Electronics and Communication Engineering, Amrita School of Engineering, Coimbatore, Amrita Vishwa Vidyapeetham, Amrita University, 641112, India;3. Department of Mechanical Engineering, Amrita School of Engineering, Chennai, Amrita Vishwa Vidyapeetham, Amrita University-601103, India;4. Welding Research Institute, Bharat Heavy Electricals Ltd., Tiruchirappalli, 620014, India;1. School of Mechanical Engineering and Automation, Beihang University, 100191, China;2. MIIT Key Laboratory of Aeronautics Intelligent Manufacturing, Beijing 100191, China |
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| Abstract: | The passive visual sensing method was successfully applied to monitor the weld pool in TIG welding of aluminium alloy. In order to reduce the disturbance from the arc and acquire clear image, two techniques were used: one was the own-developed computer-controlled variable polarity power(VPP), the other was the composite filter technology. The VPP source did not have high-frequency electromagnetic interference from arc stabilizer in traditional AC welding power, and its output current wave was controlled by computer, so the imaging current and the imaging time could be adjusted easily. Filter spectral window was identified at 650 nm by analyzing the measured arc light spectral distribution. At the end, the high quality and clear images of welding pool of aluminium alloy were successfully acquired at low imaging current. |
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| Keywords: | visual sensing weld pool aluminium alloy variable polarity power TIG spectral filter |
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