对称过渡阶段时间对双丝MIG焊的影响

Research on symmetrical transition time's effects on double-wire MIG welding

根据国内外对双丝电流波形控制的研究现状和两丝之间电磁力大小的关系,提出一种双丝MIG焊对称过渡波形控制工艺方法。针对有无对称过渡阶段和双丝过渡阶段时间Ts对焊接效果的影响进行了试验研究。结果表明:增加对称过渡阶段有助于提高焊接过程稳定性。在当前试验条件下,双丝过渡阶段时间Ts不宜低于1 ms,否则无法体现对称过渡控制的优势;不宜高于峰值时间,否则会影响焊缝质量,降低焊接速度;过渡时间为2～3 ms时,能够获得稳定的波形和良好的焊缝。试验结果为对称过渡波形控制方法提供了基本的工艺数据,为双丝电流波形控制研究提供了新的方法。

A symmetrical transition waveform control process for double-wire MIG welding is proposed based on the current study,with considering the change of electromagnetic force between two wires.the effects of The availability of symmetrical transition and double-wire transition time Ts on welding quality are studied.The results show that it＇s helpful to improve the stability of the welding process while increasing the symmetry transition.Under the current experimental conditions,double-wire transition time Ts should not be lower than 1 ms,otherwise the advantages of symmetric transition control are unable to be realized.Double-wire transition time Ts should not be longer than the peak time,otherwise it will affect the weld quality and lower welding speed.During the transition time of 2～3 ms,waveforms are stable and weld quality is good.This results provide basic process data for symmetrical transition waveform control process and a new approach for waveform control of double-wire welding.