At present, steel structure manufacturing has been widely used in plant
construction. The main components of the steel structure building are welded
H-shaped steel columns, beams and supports. These components have welding
deformation problems during the manufacturing process. If the welding
deformation is not corrected, it will not only affect the overall installation
of the structure, but also reduce the safety and reliability of the project.
The correction methods commonly used in the production process mainly
include mechanical correction, flame correction and comprehensive correction.
However, flame correction is a difficult operation. The mastery of the method
and improper temperature control will cause new deformation of the component.
Therefore, flame correction requires a wealth of practical experience. The
stress caused by flame correction is the same internal stress as the internal
stress of the weld. The internal stress generated by improper correction and the
internal stress and load stress of the welding superimpose, the longitudinal
stress of the column, the beam and the bracing exceeds the allowable stress,
resulting in a reduction of the bearing safety factor. Therefore, we must be
cautious in the manufacture of steel structures, try to use reasonable process
measures to reduce deformation, and try to use mechanical correction when