Double Center Negative Pressure Arc Filling Wire Welding Method

Abstract

The invention belongs to the field of welding methods, and discloses a dual-center negative pressure electric arc wire filling welding method. Two identical hollow tubular cathodes are arranged, and two sets of welding power sources and control systems are connected with the cathodes. Gas in an electric arc center area is extracted away through a gas extractor, so that pressure of the area is lowered, a certain pressure difference exists between the gas in the electric arc center area and gas outside electric arcs, the two arcs are compressed at the same time under the action of barometric pressure, and a high-energy-density constrained electric arc is formed. Welding wires are vertically fed from the position between two electrodes, electric arc heat is absorbed for melting to form molten drops, and the molten drops are transited to a melting pool. According to the welding method, the current bearing capacity is increased, and the welding speed is increased. By means of the formed high-energy-density electric arc, penetrability on a workpiece is increased, the interference action of the two electric arcs is weakened, part of electric arc heat is extracted away through gas extracting, the heat influence area range is narrowed, and welding deformation is relieved. The position between the two electrodes is filled with the welding wires, the interference action of the two electric arcs can be balanced, and the welding defects such as undercut and melting pool collapsing brought by high-energy beam welding can be overcome.

Description

technical field [0001] The invention relates to a double-center negative pressure arc wire-filling welding method, which belongs to the field of welding methods. Background technique [0002] Welding has gradually become an indispensable processing technology in modern industry, ranging from mobile phones, watches, electronic chips, to automobiles, ships, spacecraft, and large building structures, all of which cannot be separated from welding technology. With the increase of people's investment in the welding field, new welding technologies have sprung up one after another. The purpose of these new technologies and new methods is to improve the welding quality and improve the welding efficiency. [0003] High-energy beam welding has always been a model of high-efficiency welding. In the field of arc welding, plasma arc welding is currently the best high-energy beam welding method. This method uses three major compression effects: mechanical compression, self-magnetic compres...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the defects and deficiencies of the existing welding methods, and propose a double-center negative pressure arc wire-filling welding method

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