Research on phase control method of Tandem twin wire welding

Tandem双丝气保焊相位控制方法研究 Research on phase control method of Tandem twin wire welding 苏立虎 SU Lihu 1 first-author 唐山松下产业机器有限公司 唐山松下产业机器有限公司 Panasonic Welding Systems (Tangshan) Co.,Ltd. Panasonic Welding Systems (Tangshan) Co.,Ltd. 研究分析了Tandem双丝脉冲气保焊主从机不同相位匹配对电弧的影响。主从机双丝协调焊接时,相位匹配有四大阶段,模式1是主机与从机同时输出脉冲,此时主从机脉冲为同相位匹配;模式2是主机到达脉冲峰值阶段,从机开始输出脉冲;模式3是主机在脉冲下降阶段,从机输出脉冲;模式4是主机在基值阶段,从机开始输出脉冲。采用松下全新开发的第二代双丝焊接系统进行焊接试验,结果表明,当采用模式1时,由于主从机两电弧同时处于峰值阶段且完全重合,干扰较大,造成较大的飞溅;模式2时,主从机峰值阶段有部分重合,也存在电弧干扰,比模式1干扰小,也会有较大的飞溅;模式3时,主机脉冲熔滴开始脱落,如果在主机脉冲下降沿的初期,从机刚开始输出脉冲,会对主机的熔滴过渡产生电弧冲击,产生飞溅,飞溅比模式1和模式2小,在主机下降沿接近基值阶段从机再输出脉冲,飞溅小,电弧稳定;模式4时,主机进入基值阶段处于维弧时期,电流较小,此时从机输出脉冲,主机电弧可能被拉断,如果主机电弧正常,此时焊接效果良好,飞溅小,成形美观。综合4种模式,当主机下降阶段,熔滴脱落完成后,从机输出脉冲,此时相位匹配最合适,焊接效果最好。当主机设定电压或干伸长发生变化时,相位匹配时刻自动调整。 The influence of different phase matching between lead and trail machines on the arc of tandem twin wire pulsed gas shielded welding is studied. There are four stages in the phase matching of lead-trail machine twin wire coordinated welding. Mode 1 is that the lead and trail machines output pulses at the same time,at this time,the lead-trail machine pulse is in phase matching;mode 2 is that the lead machine arrives at the pulse peak stage,and the trail machine starts to output pulse;mode 3 is that the lead machine is at the pulse descending stage,and the trail machine outputs pulse;mode 4 is that the lead machine is at the basic value stage,and trial machine starts to output pulse. The second generation twin wire welding system newly developed by Panasonic is used to carry out welding test. The results show that in mode 1,because the two arc of lead-trail machines are in peak stage at the same time and completely coincide,the interference is large,resulting in large spatter. In mode 2,the peak phase of the lead-trail machines overlaps,and there is arc interference,which is smaller than that in mode 1,and there is also large spatter;In mode 3,the lead machine pulse droplet begins to fall off. If the trail machine starts to output pulse at the early stage of the lead machine pulse falling edge,it will produce arc impact on the metal transfer of the lead machine and generate spatter,which is smaller than that in mode 1 and mode 2. When the falling edge of the lead machine is close to the basic value,the trail machine outputs pulse again,the spatter is small and the arc is stable. In mode 4,the lead machine enters into the basic value stage and is in the arc maintenance period,and the current is small. At this time,the trail machine outputs pulses,and the arc of lead machine may be broken. If the arc of lead machine is normal,the welding effect is good,the spatter is small and the shape is beautiful. When the lead machine is at declining stage and droplets fall off,the trail machine outputs pulse,and the phase matching is the most appropriate and the welding effect is the best. When the set voltage or extension length of welding wire of the lead machine changes,the phase matching time is automatically adjusted. 双丝 相位 主机 从机 峰值 基值 tandem phase lead machine trail machine peak value basic value TG434.5 2022-03-08 6 51