Welding process of union melt welding small divided edge

Abstract

The invention relates to a welding process, in particular to an automatic submerged arc welding small groove welding process. The welding process comprises the following steps: a groove is cut on a welding piece, the angle of one side of the groove is 35 degrees, and the angle of other side of the groove is 45 degrees; the H pair group of the welding piece is performed, and the welding piece is fixed by the spot adhibiting method, and the spot adhibiting fixing welding seam is arranged on the 45-degree side of the groove; the welding piece is welded, the 35-degree side of the groove is firstly welded, when one-third of the 35-degree side of the groove is welded, the root part of the 45-degree side of the groove is cleaned, after the cleaning, the welding continues, through the repeatedly staggered welding, the weld pass is completely filled. Compared with the prior art, the welding process has the advantages of reducing the welding time, improving the welding speed of the workpiece, ensuring the scheduling requirements on a project, reducing the filler level of weld metal, saving one-third of welding materials, directly improving actual economic benefits and reducing the welding deformation; moreover, because the angle of the groove is reduced, the welding process also has the advantages of reducing the pre-heating width of the welding seam, lowering the defect of the welding seam and lowering the repair cost.

Description

Technical field: [0001] The invention relates to a welding process, in particular to a submerged arc automatic welding small groove welding process. Background technique: [0002] In the production process of all steel structure manufacturing enterprises, the angle and form of the full penetration welded groove of thick plate welded H steel generally adopt the code named SC-TK-2 in the "Technical Regulations for Welding of Building Steel Structures (JGJ81-2002)". Groove form. Due to this kind of groove angle, it is difficult to meet the cutting surface precision when cutting, and because of the large groove angle, the filling amount of welding metal is also large, the welding deformation of thick plate H steel is large, and it is difficult to repair thick plate H steel. , affecting the quality and progress of steel components. Invention content: [0003] The present invention aims to solve the above-mentioned technical defects existing in the existing small groove weldin...

AI Technical Summary

Problems solved by technology

Due to this kind of groove angle, it is difficult to meet the cutting surface precision when cutting, and because of the large groove angle, the filling amount of welding metal is also large, the welding deformation of thick plate H steel is large, and it is difficult to repair thick plate H steel. , affecting the quality and progress of steel components

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