Controlled bridge transfer (CBT) gas metal arc process for steel sheets joining
Controlled bridge transfer (CBT) gas metal arc process for steel sheets joining
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DOI：
10.1080/09507116.2011.606152
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发表时间：
2013-03
影响因子：
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通讯作者：
T. Era;Akinobu Ide;Toshiro Uezono;T. Ueyama;Yoshinori Hirata
中科院分区：
文献类型：
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作者：
T. Era;Akinobu Ide;Toshiro Uezono;T. Ueyama;Yoshinori Hirata
在非脉冲熔化极气体保护电弧焊（GMAW）中，在再燃弧之前将短路电流降低到一个较低的水平，可以减少飞溅。飞溅的减少需要通过稳定金属转移和提高精度对干扰的鲁棒性来提高预测再燃弧的精度。控制桥过渡（CBT）工艺优化了响应于金属过渡的真实的实时预测再燃的准确性，实现了非脉冲GMAW中飞溅的减少和电弧的稳定。传统上，GMAW使用电极正极性进行。然而，这种极性是不够的焊接超薄钢板，特别是那些薄于1.0毫米。与电极负（EN）CBT过程中，虽然轻微的电弧电压波动发生的行为所造成的阴极斑点的尖端上的电线在EN极性GMAW，瞬时电压使用命令计算，以提高对干扰的瞬态响应。因此，可以获得稳定的电弧，而不会增加单位时间内的短路次数，从而获得无飞溅的焊接。
In non-pulsed gas metal arc welding (GMAW), spatter can be reduced by lowering the short-circuit current to a low level just before the re-arcing. The reduction in spatter requires an improvement in the accuracy of predicting the re-arcing by stabilizing the metal transfer and improving the robustness of the accuracy against disturbances. The controlled bridge transfer (CBT) process optimizes the accuracy of predicting the re-arcing in real time in response to the metal transfer, realizes spatter reduction and stable arc in non-pulsed GMAW. Traditionally, GMAW is carried out using electrode positive polarity. However, this polarity is not sufficient for welding extra-thin steel sheets, specifically those thinner than 1.0 mm. With electrode negative (EN) CBT process, although slight arc voltage fluctuation occurs caused by the behaviour of cathode spots on the tip of the wire during EN polarity GMAW, instantaneous voltage uses command computation to improve the transient response against the disturbance. Consequently, a stable arc can be obtained without increasing the number of short circuits in a unit time to obtain spatter-free welds.