At present, the spiral pipe widely used double-sided submerged arc welding technology, the following talk about the formation of submerged arc welding process and characteristics.
Principle of submerged arc welding:
Submerged arc welding is the use of arc thermal welding, and welding electrode welding is different: submerged arc welding wire is bare, no paint above, submerged arc welding flux is pre-paved in the welding, submerged arc welding The wire extends into the flux and the arc is burned under flux.
Process of submerged arc welding:
Welding wire contact with the workpiece, press the start button, the wire and the workpiece power of the moment, the wire back pumping, arc ignition, welding trolley forward, continuous welding wire to maintain the arc in the flux layer under the combustion, under the arc The formation of welding pool. Around the arc, the flux melts to form a void. The void and the molten pool are moving forward, and the molten metal behind the pool solidifies to form a continuous weld. This process is carried out under the flux, so we can not see with the naked eye. It can be seen by means of X-ray photography.
As the spiral steel pipe welding technology using submerged arc welding, in addition to this high production efficiency; production of auxiliary time less, saving the time for welding electrodes; welding conditions clean and no splash, saving clean up the time; But also for the spiral pipe plant delivery provides the necessary conditions, making a large amount of spiral steel pipe production time is guaranteed, so it is still widely used.
