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将等离子焊接 (PAW)电弧和钨极氩弧焊 (TIG)电弧串接 ,相对作用于工件的正反面形成双面电弧焊接 (DSAW)系统 ,可以引导焊接电流沿工件厚度方向流过小孔 ,补偿等离子电弧穿透工件时消耗的能量 ,以有效地提高等离子弧的穿透能力 .综合考虑影响双面电弧焊接正反面熔池几何形状的力学因素 ,建立了熔池表面变形的控制方程 ,以此为基础并采用帖体曲线坐标系建立了DSAW焊接传热的数学模型 ,分析了DSAW ,PAW焊接传热的差异 ,从传热的角度解释了DSAW焊接熔深增加的原因 .焊接工艺实验表明 ,计算结果与实测结果吻合良好 .
The plasma welding (PAW) arc and the TIG arc are connected in series to form a double-sided arc welding (DSAW) system on the front and the back of the workpiece to guide the welding current to flow through the small hole in the thickness direction of the workpiece, Compensates the energy consumed when the plasma arc penetrates the workpiece to effectively improve the penetration ability of the plasma arc.Through considering the mechanical factors affecting the geometry of the weld pool on the front and back of the double-sided arc welding, a control equation of the surface deformation of the weld pool is established Based on this, the mathematic model of DSAW welding heat transfer was established and the difference of DSAW and PAW welding heat transfer was analyzed, and the reason of DSAW welding penetration increase was explained from heat transfer.Experimental results of welding process , The calculated results agree well with the measured results.