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脉冲电流相位差对双丝P-GMAW焊电弧稳定性及焊缝成形的影响

陈东升, 陈茂爱, 武传松

陈东升, 陈茂爱, 武传松. 脉冲电流相位差对双丝P-GMAW焊电弧稳定性及焊缝成形的影响[J]. 焊接学报, 2016, 37(4): 119-123.
引用本文: 陈东升, 陈茂爱, 武传松. 脉冲电流相位差对双丝P-GMAW焊电弧稳定性及焊缝成形的影响[J]. 焊接学报, 2016, 37(4): 119-123.
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CHEN Dongsheng, CHEN Maoai, WU Chuansong. Effect of phase difference on arc stability and weld quality of tandem P-GMAW[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(4): 119-123.
Citation: CHEN Dongsheng, CHEN Maoai, WU Chuansong. Effect of phase difference on arc stability and weld quality of tandem P-GMAW[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(4): 119-123.
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脉冲电流相位差对双丝P-GMAW焊电弧稳定性及焊缝成形的影响

  • 山东大学材料液固结构演变与加工教育部重点实验室, 济南 250061

Effect of phase difference on arc stability and weld quality of tandem P-GMAW

  • MOE Key Lab for Liquid-solid Structure Evolution and Materials Processing, Institute for Materials Joining, Shandong University, Jinan 250061, China

摘要

    摘要
  • 摘要: 利用焊接过程参数与过程图像同步采集系统,研究了平均电流均为150 A时两脉冲电弧的电流相位差对电弧稳定性和焊缝成形的影响.结果表明,脉冲电流相位差为零(两电弧同相位)时,两峰值电弧相互吸引并融为一体,两基值电弧互不影响,焊接过程稳定,断弧现象很少,焊缝成形良好;随着脉冲电流相位差的增大,断弧现象逐渐增多,焊缝在宽度上出现不均匀;脉冲电流相位差为180°时,基值电弧被峰值电弧强烈吸引,以弧形跨越两焊丝之间的空间后融入峰值电弧中,弧长显著增长,断弧现象严重,重新引弧时引起较多飞溅,焊缝成形较差.
    Abstract: The effects of phase difference between the two pulsed arcs on the arc stability and weld quality of tandem P-GMAW were investigated by using a synchronization acquisition system of images and electrical parameters. The results show that when welding at a phase difference of 0, the two peak arcs attract each other and combins into one,and the two base arcs don't affect each other. The welding process is stable without any arc interruption, resulting in good weld appearance. As the phase difference increases, arc interruption frequencies of both leading and trailing arcs increase and the weld width become uneven. When the phase difference is increased to 180°,the base arc is attracted strongly by the peak arc, and a curved bridge is formed between two wires. The base arc is elongated significantly and susceptible to extinguish, thus the arc interruption frequency reaches the maximum value. The repeated arc re-ignition causes heavy spatter and worse weld appearance.
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    • 参考文献(14)
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  • 收稿日期:  2014-07-03

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