Welding backing plate mounting method

Abstract

The invention relates to a welding backing plate mounting method. The welding backing plate mounting method includes the steps that the short sides of flange plates of two box-type components are arranged opposite to each other, so that a V-shaped welding joint with a truncated edge is formed; an auxiliary rod forming a preset included angle with a backing plate is arranged on the backing plate, the auxiliary rod and the backing plate are placed in the position of the V-shaped welding joint, and the auxiliary rod is pushed so that the backing plate can slide on the short side of the flange plate of the second box-type component till the auxiliary rod makes contact with the short side of the flange plate of the first box-type component; the auxiliary rod is rotated so that the backing plate can be tightly attached to the long side of the flange plate of the adjacent first box-type component in parallel; the auxiliary rod is moved to be tightly attached to the short side of the flange plate of the second box-type component, and then the backing plate is welded to the flange plates of the two box-type components; the auxiliary rod is detached off. By the adoption of the technical scheme, the backing plate can be arranged in place accurately, and thus the mounting efficiency is improved, and the welding quality is guaranteed.

Description

technical field [0001] The invention belongs to the field of steel structure welding, in particular to a method for installing a welding backing plate. Background technique [0002] At present, when the full penetration method is used to weld butt joint construction of steel structural box-section members on site, the welding backing plate is usually spot-welded to the inner wall of the box-shaped member according to the design and specification requirements, and then the member is hoisted and positioned. Calibration, and finally welding. Repair the backing plate if the backing plate becomes obstructed during installation or if the backing plate does not completely cover the weld area. This method can meet the on-site full-penetration welding butt joint of conventional steel structure box-shaped components, but for components with complex butt joint conditions (such as: heterogeneous components, components with a certain angle or radian in the butt joint), the backing plate...

AI Technical Summary

Problems solved by technology

This method can meet the on-site full-penetration welding butt joint of conventional steel structure box-shaped components, but for components with complex butt joint conditions (such as: heterogeneous components, components with a certain angle or radian in the butt joint), the backing plate is easy to hinder the installation, and the high-altitude Large amount of repair, low installation efficiency

Moreover, for components with harsh installation environment and difficult installation, the pre-welded backing plate will hinder the installation, and at the same time, the position of the welded backing plate may shift after it is in place, which is likely to cause welding defects

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