Efficient welding method for one side welding both-side formation

Abstract

The invention relates to an efficient welding method for one side welding both-side formation. The details of the efficient welding method are as follows: workpiece blanking is carried out; a workpiece after blanking is polished and assembled to form a workpiece to be welded; a digital pulse electric arc welder selects a pulse electric arc mode and completes root pass welding of the workpiece to be welded; then, the digital pulse electric arc welder selects a spray electric arc mode and completes hot weld layer root pass welding of the workpiece to be welded; after hot weld layer root pass welding is completed, the digital pulse electric arc welder selects the spray electric arc mode and completes filling root pass welding of the workpiece to be welded; after filling root pass welding is completed, the digital pulse electric arc welder selects the spray electric arc mode and completes capping root pass welding of the workpiece to be welded; and after welding is over, a power supply isturned off. The efficient welding method can realize one side welding both-side formation, has the advantages of high cladding efficiency and good operability, and solves the technical problems that one side welding both-side formation of traditional TKY welding joints is not high in welding quality, low in operation efficiency and incapable of realizing continuous operation.

Description

technical field [0001] The invention relates to the field of welding methods, in particular to a welding method for high-efficiency single-side welding and double-side forming. Background technique [0002] Tube truss structure, also known as steel tube truss structure, tube truss or tube structure, is a form of steel structure composed of tubular cross-sectional members. There are a large number of TKY joints in the pipe truss structure, and the welding position of TKY joints changes along the intersecting line, which is a severe test for the welding skills of welders. According to AWS regulations, welders engaged in welding TYK joints of pipes must obtain 6GR that meets the requirements of this code. Welder qualification certificate; the support frame pipe is a closed structure, and its TYK joints can only be welded from the outside of the pipe. In order to ensure the full penetration of the TYK joints, the welding process adopted for the root weld pass requires single-sid...

AI Technical Summary

Problems solved by technology

[0003] Various traditional welding methods are difficult to meet the requirements. The dihedral angle of some YKY nodes is as small as 30°. If the dihedral angle is too small, the welding tool will collide with the pipe and the welding will be interrupted.

[0004] The traditional TKY node welding mostly adopts the "two-step method". The root single-sided welding and double-sided forming welding methods include manual arc welding (SMAW) and argon tungsten arc welding (GTAW). high-quality forming, but its welding efficiency is low, and the extension length of the tungsten electrode is limited, and it is difficult to weld at small angles. Welding is prone to slag inclusion and is not easy to remove; manual arc welding (SMAW) and flux-cored wire welding (FCAW-G) are mostly used for the filling cover. Manual arc welding is less efficient, and flux-cored wire welding is prone to slag inclusion and cannot be automatically Welding, and cannot achieve continuous operation

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