In the construction process of metal structure building projects, the connection technology of structural parts and the standardization of construction process operations are the key to ensure the quality of steel structure engineering. The connection process of steel structure parts includes welding, bolt connection and rivet connection. Bolted connections can be divided into ordinary bolted connections and high-strength bolted connections. Welding and bolting are two of the most commonly used joining methods in metal building projects.
Solder Connection
Through the use of special welding gas and local high-temperature heating technology, the joints of steel structural parts can be melted and connected quickly. Using welding to connect structural parts in steel structure buildings can effectively reduce the effect of welding stress on steel structural parts and cause structural deformation. The welding process of metal structure building structural parts is not complicated. First, select the welding material and welding gas according to the construction design drawings, steel types, etc., and then operate according to the welding operation process specifications. Since the welding technology has been very mature in the processing and application of steel structure buildings connectors, as long as the construction operation steps can be standardized, it is generally not easy to have defects such as cracks, solid inclusions, incomplete penetration, and tumors. Once a tumor appears due to inadvertent operation and wrong welding parameters, it can also be dealt with by shoveling, grinding, etc.
Bolted Connection
This is another commonly used joining process in metal structure building engineering. Since there are two types of link bolts used in the construction of steel structures: ordinary bolts and high-strength bolts, the bolt connection process is usually divided into two types. Ordinary bolts in metal buildings are generally long-term connecting bolts, and the quality requirements for bolts are relatively high. Therefore, before tightening, the bolt heads and nuts must be checked for tight fit with the surface of the structural parts and the washer. Avoid affecting the quality of the project due to unqualified material quantity or quality.
The connection method of high-strength bolts is different from that of ordinary bolts. It can be divided into three types: friction connection, tension connection and pressure connection. Friction connection is more commonly used in metal structure buildings. Before the construction of high-strength bolts, it should be noted that the contact surface of the bolt must be cleaned first to ensure that the contact friction surface is clean, and the anti-slip coefficient of the friction surface of the bolt should be checked and calibrated. In the construction process of bolted connections in steel structure construction projects, attention should be paid to ensure that each connection can only be carried out after the position is calibrated, and each node must be consistent. The torque method and the angle method can be selected according to the actual situation in the process of bolt connection fastening.
