摘要
多丝焊接时,由于电弧电场、磁场、热场和流场的相互作用和影响,使得电弧干扰分析异常复杂。焊接电弧的稳定性直接影响着焊接质量,而焊接电弧的稳定性是指保持电弧稳定燃烧而不产生断弧和磁偏吹。利用高速摄影技术对不同电流组合形式下的双丝、三丝CO_2焊接的电弧断弧频率和电弧干扰行为进行分析。结果表明:双丝焊接时,当引导电流大于跟随电流且相差在100A时,电弧的稳定性较好。三丝焊接的电弧断弧频率明显高于双丝焊接的电弧断弧频率;随着线能量的增大,电弧的断弧次数明显增加。当双电弧之间形成一定量的熔池"凸起",可以减小电弧之间的干扰。但当线能量过大时,熔池的流动金属过多,熔池"凸起"作用反而不利于电弧的稳定燃烧。
Due to mutual interaction of arc electric field, magnetic field, thermal field and flow field, the arc interferenceanalysis of multi-wire CO2 welding is complex. The good welding quality is affected by are stability without arc interruptionand magnetic blow. Are interruption frequency and arc interference behavior of twin wire and triple wire CO2 welding underdifferent current combinations were analyzed by using high-speed photography technology. The results show that when theguiding current is bigger than the following current and the difference is 100 A during twin wire welding, the arc stability isgood. Arc interruption frequency of triple wire welding is obviously higher than that of twin wire welding. With the increase ofthe line energy, the number of arc interruption increases obviously. When a certain amount of weld pool bulge is formedbetween double arcs, it can reduce the arc interference. While the line energy is too large, the volume of flowing metal inmolten pool is too large and the effect of weld pool bulge is not conducive to stable combustion of the arc.
出处
《热加工工艺》
CSCD
北大核心
2016年第21期173-175,179,共4页
Hot Working Technology
基金
国家自然科学基金项目资助课题"三丝MAG电弧耦合作用对熔池流体动力学行为的影响机理研究"(51504152)
关键词
双丝焊接
三丝焊接
电弧干扰
twin wire welding
triple wire welding
arc interference
