Automatic welding method for vertical butt joint of steel pipe columns

Abstract

The invention discloses an automatic welding method for vertical butt joint of steel pipe columns, a second welding surface of an upper steel pipe column and a first welding surface of a lower steel pipe column form a circular seam, and a guide rail is mounted on the upper steel pipe column. The welding wire moves forwards and swings up and down in a circular seam to finish bottom layer welding; when the welding gun advances along the guide rail, the distance between the welding gun and the lower steel pipe column is kept consistent through the distance automatic compensation system; the second datum point is lower than the initial datum point, and the welding gun moves forwards along the guide rail with the second datum point as the starting point and swings up and down in the circular seam so that the first welding of the second layer and the second welding of the second layer can be completed through welding wires. Compared with the prior art, horizontal distance compensation is carried out when the bottom layer is welded, height compensation is carried out when the second layer is welded, and the welding quality is ensured. And a horizontal distance compensation step is omitted during welding of the second layer, so that the welding efficiency is improved.

Description

technical field [0001] The invention relates to the field of building construction, in particular to an automatic welding method for vertical butt joints of steel pipe columns. Background technique [0002] The length of large-diameter steel pipes is relatively long, which is inconvenient for transportation. Generally, they are manufactured in sections in the factory, and then welded and installed in sections from the bottom to the top on the site. The usual construction method is to install the first section of steel pipes first, and then use them. The hoisting facility places the second section of steel pipe above the first section of steel pipe. The first section of steel pipe and the second section of steel pipe have a positioning plate for auxiliary welding positioning and a positioning connecting plate protruding from the cylindrical surface to a certain height in the docking position area. Welding creates obstacle-surmounting difficulty. In the prior art, multiple or...

AI Technical Summary

Problems solved by technology

[0003] (1) High technical requirements for welders, difficult welding quality control, low manual welding efficiency, and relatively high engineering costs;

[0004] (2) Workers are highly dependent on the working environment. The higher the welded steel pipe is, the worse the working environment and working conditions of the workers will be, and the efficiency will be slower.

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