High - rise steel structure parts processing and manufacturing management

The manufacturing of components in high-rise steel structures needs to be strictly controlled, because it is closely related to their quality. Therefore, this article will explain the requirements for the production of high-rise steel structure components. High-rise steel structure. First from the high - rise steel structure component processing technology to explain. Generally speaking, the most commonly used components in steel structure buildings are cross stiffened column members, T-type embedded steel structural parts and H-type steel structural parts, so it will be explained from these several components. The CROSS stiffening column is WELDED BY A H-shaped steel and TWO T-shaped steel. The shrinkage of the component and the amount of weld deformation should be estimated during welding to improve the accuracy of the combined component.

When making T-shaped steel, two T-shaped steel are usually made at the same time for the convenience of production and component accuracy. First, a H-shaped steel is created by using the steel plate, and then its web is separated according to the drawing data and welded and adjusted. After the completion, the process plate is removed and polished. Generally, H-beam steel production line is used to make H-beam steel. To ensure the accuracy of the external dimension after welding, appropriate welding process parameters and necessary mechanical and thermal correction should be selected. The welding requirements of high-rise steel structure processing, this technology in the steel structure of the members of the joint and detail members of the connection of the number of times is very frequent. In the welding of high-rise steel structure, two aspects should be paid attention to: welding sequence and lamellar tearing.

Welding sequence, in the welding of steel structure building, a reasonable welding sequence can avoid the damage of welding stress to the components, but also prevent the deformation of welding joints. The welding sequence should be customized according to the structural form of the steel structure building. For example, the wing and web joint of H-shaped steel should be avoided in the same section as far as possible, and the joint position of the upper and lower wings should be staggered with the web by more than 20cm.

Interlayer tear is a ladder shaped crack formed along the steel plate layer on the component during welding. It is a kind of serious crack that is easy to occur among the layers one after another. The effective way to prevent such cracks is to strictly control the sulfur content of steel and the stress concentration phenomenon caused by groove shrinkage during welding. Multi-layer welding can also be used to reduce the shrinkage stress. In order to make the weld metal with low yield point and high ductility, welding materials with low strength matching should be adopted. In order to improve the toughness of the joint area, the preheating temperature should be adopted or increased. It is essential to reduce the sulfur content of base metal, reduce inclusions and delamination defects of base metal so as to improve its performance in thickness direction.

Finally, the coating scheme, because of the material characteristics of steel itself, it is easy to be damaged by oxygen, water vapor and acid and alkali substances, reduce the structural strength. Therefore, it is necessary to brush the corresponding layer of anti-corrosion coating on the steel surface according to its drawing design. Note that the thickness of the coating and the number of layers are strictly according to the design instructions.