Method for controlling welding deformation of box column

Abstract

The invention discloses a method for controlling welding deformation of a box column. The method comprises the following steps of 1) arranging supporting points of which the number is larger than two in an I-stage welding seam area of an optional side of two symmetrical sides of a web plate, wherein the distance between every two supporting points is 30-400 mm, the supporting points protrude out of the edge of the web plate, and the length of the supporting points along the edge of the web plate is 20-40 mm; 2) processing two side edges of the web plate into grooves; 3) assembling the web plate and a frange plate together by taking the supporting points as welding points after groove processing is finished; and 4) welding a base plate on the back surfaces of welding seams in a spot welding way, carrying out backing weld, reserving and enabling the supporting points and 20-mm welding seams which are arranged at two sides of the supporting points not to be welded, removing the supporting points after other welding seams except the supporting points and the 20-mm welding seams which are arranged at the two sides of the supporting points until reaching to the base plate, polishing clearly, and then carrying out backing weld on the supporting points and the 20-mm welding seams which are arranged at the two sides of the supporting points. According to the method disclosed by the invention, the internal quality of the welding seams can be ensured, and the deformation problem of the box column is also solved.

Description

technical field [0001] The invention relates to the field of steel structure welding, in particular to a method for controlling the welding deformation of a box-shaped column. Background technique [0002] Box column is a common structural form in industrial buildings and civil buildings. The corbels of the four fillet welds of the box-shaped column body and the lengths of 600mm on both sides of the corbels are Class I welds, requiring ultrasonic flaw detection, while other parts do not require ultrasonic flaw detection. For the weld area that requires flaw detection, a gap must be reserved, and the backing plate at the bottom can ensure full penetration, while the weld area that does not require flaw detection does not need to reserve a gap. This often leads to large post-weld shrinkage in areas with reserved gaps, and small post-weld shrinkage in areas without gaps. Finally, the cross-sectional dimensions of the box-shaped columns are different, and the geometric size err...

AI Technical Summary

Problems solved by technology

This often leads to large post-weld shrinkage in areas with reserved gaps, and small post-weld shrinkage in areas without gaps, resulting in variable width and narrow cross-sectional dimensions of box-shaped columns and large geometrical size errors, which affect the overall quality of components

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