Steel structure processing deformation problems so do

Steel structure processing deformation problems so do

Although the steel structure building has become a recognized building structure and has indeed passed the market test, it will still make people anxious in the face of the deformation problem of steel structure workshop in the process of processing. Based on this reason, the steel structure manufacturer analyzes the reasons and summarizes the specific operation methods.

Causes of deformation

1. Deformation often occurs in the processing of complex steel structure, which is mainly caused by hot deformation, cold deformation or interrelated components can not be assembled into one;

2. The thermal deformation of steel structure workshop is generally caused by improper welding process; Cold deformation is caused by large volume and poor rigidity; The reason why the interrelated components can't be assembled as a whole is due to inaccurate lofting and marking, wrong assembly sequence or deformation.

Operation method of reducing welding thermal deformation

1. Fixture fixing method: clamp the combined weldment with a rigid fixture, control the deformation with force, and then weld. During welding, the expansion force and contraction force will be generated inside the weldment, which is limited by the force of the fixture and can significantly reduce the deformation. However, there is a large internal stress in the weldment by this method, which is not suitable for the components requiring smaller internal stress.

2. Anti deformation method: before welding the steel structure workshop components, it should be judged according to the situation of the welded metal components. When cooling after welding, the direction and amount of deformation will bend or incline the weldment in the opposite direction in advance. After welding, due to its shrinkage deformation, it will just return to the predetermined shape and position. The purpose of preventing welding deformation and reducing welding stress can be achieved.

3. Positioning control method: before welding, many welding spots are used to position the welding position or around the component, and heavy objects can be pressed on both sides of the weld.

4. Welding sequence method: the correct arrangement of welding sequence is the method to prevent welding deformation. The rule of welding deformation is that the deformation caused by the first weld is more serious, and the deformation caused by each weld generally can not offset each other. Later, the deformation method is always consistent with the deformation direction caused by the first weld.

The reason is to find out the problem and then solve it pertinently. I believe the above methods can help you solve the deformation problem in the processing of steel structure workshop.