【摘要】 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t₀,则有60%以上的短路时间集中在（t₀±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t₀的影响,初步确定在正常焊接条件下,不同的焊条直径时,t₀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。更多还原

【Abstract】 This paper deals with the short circuiting time distribution of the droplets of lowhydrogen electrodes during manual arc welding.A Type MC-80A dynamic analyzerhas been used with various types of rectifiers as the welding power supply.The observedshort-circuit probable distribution belongs to the separated probable model.Let the timecorresponding to the maximum short-circuit probable value be t₀,then over 60% ofthe short-cicuit transition will fall within the range of （t₀±3） ms.The variationrange of t₀ for various electrode diameters has been determined after studying the effectof electrode diameter,welding condition and power supply characteristics on t₀.Thisinvestigation will help reveal the relation-ship between the spattering of low hydrogenelectrodes and the characteristics of power supply and find a more rational method forevaluating the dynamic characteristics of the arc welding power source.更多还原