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铝合金变极性等离子焊接电弧产热机理 被引量:19

Principle of produced heat by arc properties in VPPA of aluminum alloy
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摘要 从铝合金变极性等离子焊接电弧物理特性出发,研究了铝合金变极性等离子焊接电弧产热机理,分析了焊接参数对电弧热的影响规律。通过理论分析和试验研究,发现铝合金变极性等离子弧焊接时不对称电极特性对正、反极性期间电弧的产热具有很大的影响。反极性期间由于铝合金作为阴极,阴极压降大电弧产热量也增大。在变极性等离子弧焊接时正、反极性期间的焊接电流和持续时间等参数不同也是造成正、反极性等离子电弧产热不同的重要原因。 The paper studied principle of arc produced heat in VPPA and analysed how welding parameters influence arc heat from physical properties of arc on Al alloy.It is shown that dissymmetrical electrode properties have great influence on produced heat of arc in positive and negative times.When Al alloy is used to be negative electrode,negative voltage produced more heat.Different parameters of welding current and lasting times are very important factors to produce heat in positive and negative times.
出处 《焊接学报》 EI CAS CSCD 北大核心 2007年第12期35-37,42,共4页 Transactions of The China Welding Institution
基金 国家自然科学基金资助项目(50764007) 内蒙古自治区高校科研项目(NJ06066)
关键词 变极性等离子电弧 电特性 铝合金 variable polarity plasma welding electrical properties aluminum alloy
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参考文献5

  • 1Tomsic M, Barhorst S. Keyhole plasma arc welding of aluminum with variable polarity power[J]. Welding Journal, 1984, 63(2) : 25 - 32.
  • 2Nunes, Bayless E O. Variable polarity plasma arc welding on space shuttle external tank[J]. Welding Journal, 1984, 63(4): 27- 35.
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二级参考文献6

  • 1安藤弘平 长谷川光雄.焊接电弧现象[M].北京:机械工业出版社,1985..
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引证文献19

二级引证文献80

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