Three-wire welding torch, welding system and method for double-arc and cold wire pulse hybrid welding

Abstract

The invention provides a double-electric-arc and cold wire pulse composite welding three-wire welding gun and a welding system and method. Projection points, on the surface of a workpiece, of a cold wire conductive tube, a first guiding welding wire and a second guiding welding wire are three vertexes of an equilateral triangle, the distance between the projection point, on the surface of the workpiece, of the cold wire conductive tube, and the projection point, on the surface of the workpiece, of the first guiding welding wire is 10-15 mm, the distance between the projection point, on the surface of the workpiece, of the cold wire conductive tube, and the projection point, on the surface of the workpiece, of the second guiding welding wire is 10-15 mm, the included angle between the cold wire conductive tube and the axis direction of a welding gun body is 3-10 degrees, the included angle between the first guiding welding wire and the axis direction of the welding gun body is 3-10 degrees, the included angle between the second guiding welding wire and the axis direction of the welding gun body is 3-10 degrees, and the cold wire conductive tube is arranged behind a first guiding welding wire conductive tube and a second guiding welding wire conductive tube in the welding direction. Cold wires are added to double electric arcs, so welding efficiency is improved; the functions of stabilizing a weld pool and reducing heat input are achieved through adding of the cold wires, the three wires are integrated into the welding gun, only one welding gun is operated during welding, and the welding gun is easy and convenient to operate.

Description

technical field [0001] The invention relates to the technical field of welding engineering, and more specifically relates to a three-wire torch, a welding system and a method for combined welding of double arcs and cold wire pulses. Background technique [0002] In recent years, the rapid development of aerospace, transportation, marine engineering and other industries has greatly promoted the progress of welding technology. The diversity of products, materials, and conditions of use has led to higher and higher requirements for welding efficiency and quality. How to use high-quality and efficient welding technology to meet the needs of current industrial development is an important task for welding workers. Therefore, improving welding production efficiency and welding quality, realizing automatic welding production, and reducing welding defects have become urgent requirements for actual production. [0003] Abroad, mainly companies such as Germany, Japan, Austria, Switzer...

AI Technical Summary

Problems solved by technology

But this welding method is not suitable for smaller welding parameters

Because the middle welding wire is non-conductive, under smaller welding parameters, the other two welding wires produce less heat, so the cold wire is not easy to melt, resulting in weld defects

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