| 在线测量薄板焊缝区的变形 |
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| 引用本文： | 郭楠,梁晋,龚春园,王晓光.在线测量薄板焊缝区的变形[J].焊接学报,2016,37(8):1-4. |
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| 作者姓名： | 郭楠 梁晋 龚春园 王晓光 |
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| 作者单位： | 西安交通大学 机械制造系统工程国家重点试验室, 西安 710049;广东顺德西安交通大学研究院, 佛山 528300 |
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| 基金项目： | 国家自然科学基金资助项目(51421004)；中央高校基本科研业务费专项资金资助；广东省公益研究与能力建设专项资金(2014A010104003) |
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| 摘 要： | 针对薄板在堆焊过程中焊缝区发生较大塑性变形的问题，提出一种基于数字图像弱相关技术的光学非接触在线测量焊接变形的方法，在焊接及冷却过程对焊缝区域全场及关键点的变形状态进行跟踪测量，获取变形规律.对Q235薄板进行钨极惰性气体保护焊（TIG）堆焊试验，结果表明，垂直于薄板方向上的变形量远大于其余两个方向；薄板焊缝区在焊接过程中先呈凸起状，逐渐冷却后呈马鞍状；薄板焊缝关键点及焊缝区的面外变形量随焊接电流的增大而明显增大.此方法对验证薄板焊接变形的数值模拟预测和揭示焊接变形机理等具有重要的指导意义.
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| 关 键 词： | 焊缝区 数字图像弱相关 焊接变形 测量 |
| 收稿时间： | 2014/8/22 0:00:00 |
Real-time measurement of distortion in weld bead zone |
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| GUO Nan,LIANG Jin,GONG Chunyuan and WANG Xiao guang.Real-time measurement of distortion in weld bead zone[J].Transactions of The China Welding Institution,2016,37(8):1-4. |
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| Authors: | GUO Nan LIANG Jin GONG Chunyuan and WANG Xiao guang |
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| Affiliation: | State Key Laboratory for Manufacturing Systems Engineering, School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, China;Guangdong Shunde Xi'an Jiaotong University Academy, Foshan 528300, China |
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| Abstract: | The large plastic distortion occurs in the weld zone for bead-on-plate welding of thin-plate. A non-contact method was proposed to real-time measure the welding distortion in bead-on-plate welding and cooling process based on weak correlation technique of digital image. The study of full-field distortion law and dynamic distortion law of key points were measured in real-time. Bead-on-plate welding of Q235 steel plate by tungsten inert gas (TIG) welding were carried out to explore distortion law. The results show that the distortion in vertical direction is much larger than that in the other two directions. The thin-plate becomes a convex shape in the welding process and then turns to a saddle shape in cooling process. The full-field distortion of thin-plate is larger with welding current being increased. This method can verify the prediction of numerical simulation and reveal the mechanism of welding distortion in thin-plate, and has important guiding significance. |
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| Keywords: | welding bead zone weak correlation of digital image welding distortion measurement |
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