One is the deformation during the process of structural assembly welding, that is, according to the stage structure, size and thickness of the plate, the corresponding welding method is also different. In this case, as long as there is a little improper operation, the welding parts and products will be produced in varying degrees of uneven, bending, twisting and wave deformation, and even affect the use of.

      the other is the deformation produced by the rolling process, the specific point is that the stage truss in the rolling process produced some residual stress, the consequences may be deformed. In addition, the early stage of transport, dipping and storage process will be subject to all kinds of force, but if the force properly, will produce a variety of deformation is not surprising.

      another reason is the process of deformation, which is due to parts in the production process, if the internal stress is partially released, it will cause some deformation.