双丝夹角对双丝间接电弧特性的影响
Effect of angles between twin wires on twin-wire indirect arc characteristic
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摘要: 建立了双丝间接电弧的三维有限元数学模型,分析了不同双丝夹角对双丝间接电弧特性的影响.利用高速摄像机拍摄电弧图片与计算结果对比,以验证计算结果的准确性.结果表明,双丝间接电弧的温度、速度和电流密度等电弧参数在阴极区和阳极区较高,在弧柱区较低,弧柱区下端最低;随着双丝夹角的增加,双丝间接电弧的温度、速度、电流密度在阴极区、阳极区以及弧柱区上端增加,在弧柱区下端下降;上述电弧参数的变化率在阴极区和阳极区大于弧柱区,阳极区大于阴极区,弧柱区上端大于弧柱区下端;双丝间接电弧的偏转程度随着双丝夹角的增加而增加.Abstract: Three dimension finite element model of twin-wire indirect arc was established and the influence of different angles between twin wires on the arc characteristic was studied. The images of the arc were obtained by a high speed camera to verify the correctness of calculation. The results showed that the temperature, velocity and current density of the arc are high in the cathode and anode regions and relatively lower in arc column region and lowest in the lower part of arc column region. The temperature, velocity and current density of the arc increase in the cathode region, anode region and upper part of the arc column region, and decrease in the lower part of the arc column region as the angle between twin wires increases. The change rates of temperature, velocity and current density in cathode region and anode region are greater than those in arc column region, and the change rates in anode region are greater than those in cathode region with increasing angle between twin wires. The deflection of the twin-wire indirect arc increases with the angle between the twin wires increasing.
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[1] 张顺善,邹勇,邹增大.磁场对双丝间接电弧焊熔滴过渡的影响[J].焊接学报, 2011, 32(6):69-72. Zhang Shunshan, Zou Yong, Zou Zengda. Effect of applied magnetic field on metal transfer of twin-wire indirect arc welding[J]. Transactions of the China Welding Institution, 2011, 32(6):69-72. [2] 曹梅青,邹增大,王春茂,等.焊接电流对双丝间接电弧焊电弧特性的影响[J].焊接学报, 2005, 26(12):47-50. Cao Meiqing, Zou Zengda, Wang Chunmao, et al. Influence of welding current on arc characteristic o f twin-wire indirect arc welding[J]. Transactions of the China Welding Institution, 2005, 26(12):47-50. [3] 殷凤良,胡绳荪,郑振太,等.等离子弧焊电弧的数值模拟[J].焊接学报, 2006, 27(8):51-54. Yin Fengliang, Hu Shengsun, Zheng Zhentai, et al. Numerical analysis of arc in plasma arc welding[J]. Transactions of the China Welding Institution, 2006, 27(8):51-54. [4] Lu F G, Yao S, Lou S N. Molding and finite element analysis on GTAW arc and weld pool[J]. Computational Materials Science, 2004, 29(3):371-378. [5] Tanaka M, Ushio M. Numerical study of gas tuhgdten arc plasma with anode melting[J]. Vacuum, 2004, 73(3/4):381-389. [6] Yin F L, Hu S S, Yu C L. Computational simulation for the constricted flow of argon plasma arc[J]. Computational Materials Science,2007,40(3):389-394. [7] Shi C W, Zou Y, Zou Z D, et al. Twin-wire indirect arc welding by modeling and experiment[J]. Journal of Materials Processing Technology, 2014, 214(11):2292-2299. [8] Hsu K C, Etemadi K, Pfender E. Study of the free burning high intensity argon arc[J]. Journal of Applied Physics,1983, 54(3):1293-1299.
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