Integrated hot wire submerged arc welding device assisted by magnetic field

Abstract

The invention belongs to the technical field of welding equipment, and particularly relates to multi-wire submerged arc welding equipment. An integrated hot wire submerged arc welding device assistedby a magnetic field comprises a main gun body and an auxiliary gun body. The auxiliary gun body is arranged at the rear end of the main gun body and used for conveying welding wires into the main gunbody. The three wire conveying pipes are arranged in the main gun body in parallel along a welding bead. The first welding wire, the second welding wire and the third welding wire are arranged in thethree wire conveying pipes correspondingly. The first welding wire and the second welding wire are connected with an arcing power source and are used for arcing with a workpiece. The third welding wire is connected with an auxiliary power source and is used for filling a weld joint after being heated by the auxiliary power source. A nozzle is arranged at the front end of the main gun body. The whole welding device is small in size, a coupling electric arc is formed by electric arcs formed by the three wires under the action of the external magnetic field, the heat input of the welding processis remarkably reduced, and meanwhile the weld joint deposition rate is increased, and grains are refined; the burning loss of alloy elements is reduced, the internal stress of the weld joint is reduced, and welding deformation is avoided; and the overall strength and toughness of the weld joint are remarkably improved, and the weld joint with the ideal depth-to-width ratio is obtained.

Description

technical field [0001] The invention belongs to the technical field of welding equipment, and in particular relates to a multi-wire submerged arc welding equipment. Background technique [0002] Submerged arc welding is a welding method in which the arc burns under the flux layer. Because of its high production efficiency, high weld quality, small welding deformation, no arc light and less smoke and dust, it is favored by large domestic and foreign enterprises. It is mainly used In the fields of pressure vessels, railway vehicles, heavy machinery, etc., it is suitable for welding materials such as low-carbon steel, low-alloy steel, stainless steel, and nickel-based alloys. In recent years, welding scholars at home and abroad have successively studied a variety of high-efficiency and high-quality welding methods, but they have not had a major impact on the application field of submerged arc welding. [0003] Up to now, more and more welding materials such as steel plates ove...

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Problems solved by technology

However, the core technology of this method is limited by foreign countries, and the equipment cost is high. In addition, for larger thick plates, the cold wire consumes part of the welding heat input, resulting in the welding process still requiring multiple layers and multiple passes, which reduces welding efficiency.

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