A gas-electric vertical welding device and method

Abstract

The invention relates to the technical field of welding, in particular to a gas-electric vertical welding device and method. The device includes a backing plate, a welding torch, a water-cooled slider and an ultrasonic transducer; the backing plate is attached to one side of two steel plates to be welded; there is a gap between the two steel plates to be welded; The welding wire is powered to form an arc between the welding wire and the steel plate to be welded; the arc is used to melt the parts of the welding wire and the steel plate to be welded on both sides of the gap to form molten steel; the water-cooled slider is in contact with the other side of the two steel plates to be welded. The ultrasonic transducer and the water-cooled slider are fixed away from the surface of the steel plate to be welded and arranged in a direction perpendicular to the steel plate to be welded. The ultrasonic transducer is used to apply ultrasonic waves to the molten steel formed at the gap through the water-cooled slider. , so that the molten steel forms equiaxed grains after cooling. The gas-electric vertical welding device and method provided by the invention can obtain the weld structure with uniform equiaxed crystals.

Description

Technical field [0001] The invention involves the field of welding technology and specially involves a gas -electrical welding device and method. Background technique [0002] Gas and electricity vein welding is a melting polar gas protection arc welding method formed by the development of ordinary gas protection welding and electric residue welding. Its welding efficiency and welding quality are high. Board welding can also be applied to the welding of the middle thick plate of the corresponding size bridge box -type beam -type beam -type beam -type belly plate and the middle thick plate of the large storage side plate. [0003] In related technologies, when welding the steel plate, there is a gap between the two pieces of welding steel plates. The high temperature generated by the arc generated by the welding wire is melted in the front end of the welding wire and the gaps around the gap. Fill, complete welding after cooling. In order to prevent the melting steel water flow, th...

AI Technical Summary

Problems solved by technology

However, since the temperature of the backing plate and the slider is different, the cooling rate of the molten steel in contact with the two is different. Therefore, the molten steel near the side of the liner is cooled to form fine equiaxed crystals, and the molten steel on the side of the slider is cooled. A large columnar cooling structure is formed, and there is obvious boundary ferrite precipitation at the grain boundary. This structure leads to the unbalanced properties and strength of the weld

Images