Research on swing arc narrow gap free forming root welding process
In view of the difficulty in root welding for thick plate grooves,this paper proposes a narrow gap free forming root welding method by swing arc,which adjusts the arc heat distribution by controlling the arc to swing circularly,so that the welding pool can solidify and form freely.The swing arc narrow gap free forming root weld-ing experiments are carried out,and the influence of swing parameters on free forming root weld is investigated.The results indicate that the arc swing parameters significantly affect the free forming of root weld.The root weld is easy to be burnt through when the swing parameters are too small,and the penetration of groove sidewall and root can be enhanced by appropriately increasing the arc swing parameters.However,great swing parameters will lead to incomplete penetration defects.
swing arcnarrow gap metal arc weldingroot weldingfree forming
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维普
