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本试验以各种整流焊机作为焊接电源,用MC—80A 动态分析仪为测试手段,对低氢型焊条手弧焊熔滴短路时间的概率分布进行了探讨。论证了低氢型焊条手弧焊短路时间概率分布属于离散型。短路时间最大的概率值所对应的时间为t_0,则有60%以上的短路时间集中在(t_0±3)ms的区域内。本文着重分析了焊条直径、焊接工艺参数、焊机特性对t_0的影响,初步确定在正常焊接条件下,不同的焊条直径时,t_0的变化范围,这对进一步研究低氢型焊条的飞溅与电源特性的关系,对探讨弧焊电源更为合理的动特性考核方法,有一定参考价值。
In this experiment, a variety of rectifier welding machine as a welding power source, using the MC-80A dynamic analyzer as a test method, the low-hydrogen electrode arc welding hand welding drop probability distribution of short circuit time were discussed. It is proved that the probability distribution of short-circuit time of hand welding with low-hydrogen electrode is discrete. The shortest time corresponding to the probability value of the time t_0, then more than 60% of the short-circuit time concentrated in the (t_0 ± 3) ms area. This article focuses on the analysis of the electrode diameter, welding process parameters, the characteristics of the welding machine t_0 impact, initially determine the normal welding conditions, the different diameter of the rod, t_0 range, further study of the low hydrogen electrode sputtering and power Characteristics of the relationship between the arc welding power supply more reasonable dynamic characteristics of assessment methods, there is a certain reference value.