Shunting phenomenon takes place when the electrical current passes through the prior weld spots. So far there have been few areas of the shunting impact studied while this is a prevalent effect in intermittent resistance spot welding (RSW). The magnitude of this current depends predominantly on distance, number, and the size of the previous spot welds. In particular this impact creates some dimensional and metallurgical alteration in the weld nugget (Fusion zone) and heat-affected zone (HAZ) as well. In this paper an electrical current modification has been evaluated for reducing the shunting effect in which the welding current profile has been manipulated. In this method single pulsed welding current has been replaced by multi-pulsed scheme to analyze the alternations which take place in the electrical and thermal features such as voltage and consequently temperature distribution respectively caused by the shunting effect. These issues are then analyzed to inspect mechanical and metallurgical attributes of the final spot weld which has been affected by shunting current. Numerical and experimental results are then compared with spot welds produced by ordinary single pulse welding current. The results demonstrate logical optimization of joint quality after welding current modification according to the proposed method mechanically and metallurgically.

当电流通过先前的焊点时发生分流现象。到目前为止，对分流影响的研究很少，而这是间歇电阻点焊 (RSW) 中普遍存在的影响。该电流的大小主要取决于距离、数量和先前焊点的大小。尤其是这种影响会在焊缝熔核（熔合区）和热影响区 (HAZ) 中产生一些尺寸和冶金变化。在本文中，对电流修改进行了评估，以减少焊接电流分布已被操纵的分流效应。在这种方法中，单脉冲焊接电流已被多脉冲方案取代，以分析分流效应分别引起的电气和热特性（例如电压和温度分布）中发生的变化。然后分析这些问题以检查受分流电流影响的最终点焊的机械和冶金属性。然后将数值和实验结果与普通单脉冲焊接电流产生的点焊进行比较。结果证明了根据所提出的方法在机械和冶金方面对焊接电流修改后接头质量的逻辑优化。然后分析这些问题以检查受分流电流影响的最终点焊的机械和冶金属性。然后将数值和实验结果与普通单脉冲焊接电流产生的点焊进行比较。结果证明了根据所提出的方法在机械和冶金方面对焊接电流修改后接头质量的逻辑优化。然后分析这些问题以检查受分流电流影响的最终点焊的机械和冶金属性。然后将数值和实验结果与普通单脉冲焊接电流产生的点焊进行比较。结果证明了根据所提出的方法在机械和冶金方面对焊接电流修改后接头质量的逻辑优化。