Technique of double wire hidden arc welding

Abstract

A twin-wire submerged arc welding process, which initially selects welding parameters: adopts the welding method of twin-wire submerged arc welding; selects the welding method according to the welding angle height k; selects the welding wire diameter Φ according to the welding angle height k, and takes 2mm<Φ< 4mm; according to the welding angle height k and welding wire diameter Φ, initially set the welding process parameters welding voltage U, welding current I, welding speed Vh values; make the welding angle of the tracking probe and welding wire consistent. Then adjust the welding process parameters through trial welding: when the welding angle height k is too large, reduce the current I; on the contrary, when the welding angle height k is too small, increase the current I. When undercut occurs in welding, mainly reduce the welding current I, and assist in increasing the welding speed Vh. Auxiliary adjustment of the welding voltage U size, so that the welding power is 15 ~ 35kJ. The invention solves the technical problems of complicated procedures and poor welding quality in the background technology. The invention has high welding strength, high welding efficiency and saves solder.

Description

technical field [0001] The invention relates to a welding process of a weld seam, in particular to a one-time forming welding process of a long right-angle weld seam. Background technique [0002] At present, there is no special equipment and mature welding process for the reinforced long right-angle weld of the transformer oil tank. A ±500kV converter transformer and flat wave reactor, the oil tank structure is barrel type, the longitudinal channel steel is used to strengthen a=5mm, and the height of the welding angle is 7-8mm. Therefore, the welding amount of long right-angle welding seams is particularly large, and the quality Higher requirements. The traditional welding method mainly has the following shortcomings or deficiencies: [0003] 1. The process is complicated and the efficiency is low. It needs to be welded at least three times to complete, not only the process is complicated, but also the efficiency is low. For example: a 4m weld generally takes 40 minutes...

AI Technical Summary

Problems solved by technology

[0008] The object of the present invention is to provide a kind of double-wire submerged arc welding process, which solves the technical problems of complicated procedures and poor welding quality in the background technology