Pipeline submerged-arc welding wire increasing device and wire-increasingwelding technology

Abstract

The invention discloses a pipeline submerged-arc welding wire increasing device. The pipeline submerged-arc welding wire increasing device comprises a submerged-arc welding wire conductive nozzle of asubmerged-arc welding machine; a fixing frame is fixedly arranged on the submerged-arc welding wire conductive nozzle and is of an L-shaped structure, a first connecting sleeve is slantly arranged atthe bottom of a vertical rod of the fixing frame, and an increased wire guiding pipe is fixedly arranged in the first connecting sleeve; and the upper end of the increased wire guiding pipe is connected with an increased wire conveying mechanism, and the increased wire conveying mechanism conveys welding wires on an increased wire conveying disc into the increased wire guiding pipe. According tothe pipeline submerged-arc welding wire increasing device, the increased welding wires are conveyed to a welding electric arc, the increased welding wires are melted through excess heat from submerged-arc welding and do not participate in electric arc burning, the temperature of a welding pool is decreased, the existing time of the welding pool is reduced, and the welding efficiency is improved.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a pipeline submerged arc welding wire increasing device and a wire increasing welding process. Background technique [0002] The pipelines of petrochemical equipment are prefabricated in factory. The welding methods adopt gas shielded welding and submerged arc welding. Among them, submerged arc welding has high welding efficiency and high welding quality. The submerged arc welding process is mature. Only a few non-ferrous Metals cannot be welded by submerged arc welding, and other alloy materials can be welded by submerged arc welding. [0003] Now for submerged arc welding of pipelines, thin wire submerged arc welding is mostly used, that is, the diameter of the welding wire is less than φ3.2mm, and the diameter of the commonly used welding wire is φ1.6-2.4mm. The welding power source of the submerged arc welding machine is mostly 600A. Welding machine, the welding machine can...

AI Technical Summary

Problems solved by technology

The disadvantage is that the equipment structure is complex, the equipment cost is high, and the heat input during welding is large

For example, the Lincoln submerged arc welding machine is equipped with a thin-wire double-wire submerged arc welding torch. The two welding wires share a power supply and burn at the same time with an arc. A molten pool will cause the molten pool to be too large, and the molten pool exists for a long time. In submerged arc welding of pipes, the smaller the pipe diameter, the smaller the interval of the flat welding position. If the molten pool does not solidify at the flat welding position, it will A hump weld bead is formed, resulting in poor weld formation, which will affect the welding quality in severe cases

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