| 变极性等离子双弧及其控制 |
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| 引用本文： | 韩永全,许萍,杜茂华,吴永军,姚金难. 变极性等离子双弧及其控制[J]. 机械工程学报, 2011, 47(4). DOI: 10.3901/JME.2011.04.042 |
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| 作者姓名： | 韩永全 许萍 杜茂华 吴永军 姚金难 |
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| 作者单位： | 1. 内蒙古工业大学材料学,院呼和浩特,010051;内蒙古工业大学内蒙古自治区材料成型重点实验室,呼和浩特,010051
2. 内蒙古工业大学材料学,院呼和浩特,010051 |
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| 基金项目： | 国家自然科学基金(50764007); 内蒙古自然科学基金(2010BS0804)资助项目 |
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| 摘 要： | 等离子电弧由于受机械压缩、热压缩和电磁压缩三种压缩效应,电位梯度高,当焊接参数不当时易出现双弧。在铝合金变极性等离子弧焊接反极性期间由于电弧相对正极性期间电弧发散,更易出现双弧。焊接电流与离子气流量的合理匹配、喷嘴孔径与电极内缩量的配合以及变极性等离子弧焊接电源结构等是影响变极性等离子弧双弧的主要因素。通过改进焊接电源的结构及控制方法,即在维弧电源主回路上串接MOSFET管,通过MOSFET管的开通与关断来实现对维弧电源主回路的通断控制,从而避免了铝合金变极性等离子弧焊接反极性期间维弧电源分流形成双弧。通过合理选择焊接参数有效解决了铝合金变极性等离子弧焊接时的双弧现象,在厚板铝合金变极性等离子弧焊接中获得了理想的焊接质量。
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| 关 键 词： | 等离子弧焊接 电弧力 电弧形态 双弧 |
Double-arc and Its Control Procedures in Variable Polarity Plasma Arc |
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| HAN Yongquan,XU Ping,DU Maohua,WU Yongjun,YAO Jinnan. Double-arc and Its Control Procedures in Variable Polarity Plasma Arc[J]. Chinese Journal of Mechanical Engineering, 2011, 47(4). DOI: 10.3901/JME.2011.04.042 |
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| Authors: | HAN Yongquan XU Ping DU Maohua WU Yongjun YAO Jinnan |
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| Affiliation: | HAN Yongquan1,2 XU Ping1 DU Maohua1,2 WU Yongjun1 YAO Jinnan1(1.College of Materials Science and Engineering,Inner Mongolia University of Technology,Hohhot 010051,2.Key Laboratory of Material Forming,Inner Mongolia Autonomous Region,Hohhot 010051) |
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| Abstract: | It's considered that the electric potential gradient would raise,and it is apt to generate double-arc if inappropriate welding parameters are selected,all these two results are affected by three compressive effects:mechanical compression,heat compression,magnetic compression.Compared with positive polarity time,reverse polarity time in aluminum alloy variable polarity plasma arc welding(VPPAW) is easier to generate double-arc.The reasonable matching of welding current with plasma gas flow rate,orifice diame... |
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| Keywords: | Plasma arc welding Arc force Arc morphology Double-arc |
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