轴向磁场对非熔化极焊接电弧的影响

利用设计的轴向磁场产生装置,采用理论与试验相结合的思路,将其作用于非熔化极焊接过程,包括等离子焊接和钨极氩弧焊(TIG)两种焊接方法.利用高速摄像装置观察电弧形态变化,获得并对比两种电弧的变化情况.结果表明,由于等离子电弧本身组成的特殊性,导致其与TIG电弧在同样磁场作用下发生变化的程度不同.然后做出运动受力分析,建立了轴向磁场下的粒子运动模型,由于粒子轴向运动速度的差异性,导致轴向磁场下带电粒子的运动阶段的不同,给出了两者在磁场下不同变化的原因.

Effects of longitudinal magnetic field on non-consumable gas shielded arc welding

Based on theoretical analysis and experimental method, a set of parallel longitudinal magnetic field generating device is used on the non-consumable gas shielded arc welding process, which includes plasma arc welding and tungsten arc welding. With the use of a high-speed video camera observation the arc shape are measured. Then the arc changes of the two kinds of welding method under the longitudinal magnetic field are compared. The experiment results refer that owing to the specifieness of the composition of the plasma arc, the differences between the two kinds of the welding method under the same magnetic field occur. And by means of making analysis of the movement of the particle, the particle motion model is established under the longitudinal magnetic field. It illustrates that because of the difference of the longitudinal velocity of the particles the difference of the motion stage of the charged particles under the longitudinal magnetic field will appear, which explains that why the difference of the arc shape changes exists between the two non-consumable gas shielded arc welding under the same magnetic field.