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4.MIG焊射流过渡特点通过高速摄影研究发现,电弧的烁亮区呈圆锥状,焊丝端头呈铅笔尖状,熔滴沿焊丝尖端一个跟一个地脱离焊丝,熔滴尺寸很小,一般都小于焊丝直径。看不到任何飞溅和直接短路现象,电弧十分稳定,热量很集中。归纳射流过渡特点有: (1)射流过渡时,阳极斑点笼罩着整个焊丝“铅笔状”的端头,如图10所示。这时,熔滴受到斑点热和干伸长部分电阻热强烈作用,焊丝金属将被熔化,蒸发,以金属蒸气形
4.MIG welding jet flow characteristics of the transition through high-speed photography found that the bright spot of the arc was conical, tip of the wire was pencil tip, drop along the tip of the wire one by one from the wire, droplet size is small, generally Less than wire diameter. Do not see any splash and direct short circuit, the arc is very stable, the heat is concentrated. Induced jet transition features are: (1) jet transition, the anode spots shrouded the entire wire “pencil-like” ends, as shown in Figure 10. At this moment, the droplet is strongly affected by the spot heat and the resistance of the dry elongation part, the wire metal will be melted and evaporated, and the metal vapor