Butt welding method for workshop columns under humid environment

Abstract

The invention discloses a butt welding method for workshop columns under the humid environment. The butt welding method is characterized by comprising the following technological steps of (1) construction preparation, wherein before welding, a welding area is cleaned, the cleaning range is the area 30 mm to 50 mm away from a welding line, a grinding wheel is adopted to carry out grinding to remove oxide scales, metallic luster is exposed out, and impurities such as water, rust and oil contamination affecting the welding quality are removed; (2) initial positioned welding, wherein before main welding, initial positioned welding is carried out, integral combined tack welding is carried out, and the positioned welding quality should be consistent with the quality of the main welding line; (3) technology and butt welding determining, wherein according to the butt welding technology of H-type steel workshop columns, butt welding is carried out on an upper column (3) and a lower column (4) along a butt welding line (5), and according to the butt welding sequence, flange plates (2) are firstly welded, and then a web (1) is welded. The butt welding method has the advantages that due to effective combination of the welding process and the welding method, the welding quality and the working efficiency are improved, quality defects are reduced, and one-time welding percent of pass is improved.

Description

technical field [0001] The invention relates to the field of building technology, in particular to a butt welding method for factory building columns in a humid environment, and is suitable for butt welding of factory building steel columns in a humid environment. Background technique [0002] At present, the existing butt welding method of factory building steel columns has also had excellent patented designs; such as: "A Cross-shaped Steel Column Welding and Construction Method" published by the National Patent Office of China on July 3, 2012, patent No. CN201210225458, it is mainly the process control to the cross-shaped steel column in the process from manufacture to welding and assembly; another example is the patent of "high load-bearing capacity solid web lattice steel column welding method" published on October 15, 2012 No. CN201210389463, which mainly discusses the welding method of high-load-bearing solid-web lattice steel columns in detail, but at present, there i...

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Problems solved by technology

[0004] The purpose of the present invention is to address the defects in the prior art, to provide a butt welding method for workshop columns in a humid environment, and to solve the problem of welding quality control in a humid environment

In the rainy season or humid environment, for the welding of steel structures, the air contains a lot of moisture, and the high temperature of the arc will cause the moisture to decompose into hydrogen, etc., and the hydrogen will cause delayed cracks in the welding, causing hidden dangers in the structural connection. There will be cracks, which is the problem of hydrogen embrittlement

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