How to prevent local deformation in steel welding

1, the steel structure engineering design as much as possible to make the workpiece stiffness of the various parts and weld evenly arranged, symmetrical set weld to reduce cross intensive weld.
 2, large parts such as shape asymmetry, a small group of components should be welded correction of deformed during assembly welding, to reduce the overall deformation.
Workpiece welding should often flip deformation cancel each other.
 4, for easy to produce the angular distortion of parts after welding in the weld before pre-deformation treatment, such as steel v-shaped groove butt, before welding should interface appropriate booster This enables welding after flattening.
 5, the steel company to develop a reasonable welding sequence to minimize distortion. Minor weld first welding the main weld welding, the the first welding symmetric parts of the weld after welding asymmetric welds, welding contraction after a small amount of the first contraction welding large weld weld before welding butt weld The solder fillet weld.
6, workpiece size weld using segmented, stratified, intermittent welding, and controlling the current, speed, direction.
7, hand soldering longer weld should be segmented the intermittent welding method, by the middle of the workpiece to the two retired welding, welding personnel in responding to that scattered arrangement to avoid deformation caused by heat concentrated. 8, steel structure plant outside welding reinforcement pieces increases the rigidity of the workpiece to limit the welding deformation stiffeners position should be located in the opposite of shrinkage stress.