Fastener hex bolt connection method

Fastener hex bolt connection is a new type of steel frame structure connection method used after riveting and electric welding. It has the advantages of simple construction, fast assembly, reliable connection, etc., and is especially suitable for electrical structures and mechanical equipment that bear driving force loads. At present, countries all over the world have been widely used in the connection of concrete supporting prefabricated components such as road bridges, lifting equipment, and airports. In the connection of fasteners with hexagonal galvanized bolts, the internal work of prefabricated components is transmitted by the frictional force formed by the high-strength steel bolts between the surfaces of the prefabricated thick steel plates with a relatively large clamping working pressure. Therefore, the bearing capacity of high-strength bolted connections is expressed by the anti-sliding and compressive strength - the relative sliding load of the connected thick steel plates, without considering the shear of the coal plugs. The anti-skid strength depends on the torque tensile force of the high-strength bolt, the friction resistance of the steel plate surface, the friction surface and the number of high-strength bolts. The high-strength bolt connection consists of one high-strength bolt, one high-strength nut, and two high-strength sealing rings. If we do not strictly require the assembly sequence of high-strength media bolts in actual operation, since the joint furniture boards are generally uneven and the middle of the boards is not close, when there are more than 2 bolts on each joint, part of the pre-tensioning force of the bolts that are tightened first must be consumed by the deformation of the thick steel plate. When the adjacent bolts are tightened and the gap disappears, the pretension of the first tightened bolt will disappear. In order to prevent such defects and make the bearing force of each bolt of the joint head even, the tightening of general high-strength bolts should be divided into three steps (initial tightening, re-tightening, final tightening)>, at least in two steps. Moreover, it needs to be carried out in a certain order. Random tightening without order will cause additional internal work to the connection, and it may also cause gaps between the friction surfaces, which will affect the transmission of friction. When using fastener hexagonal bolts, we strictly follow the relevant technical standards in various fields to properly design, select and use high-strength bolts, and strengthen the supervision of high-strength bolts, assembly, and use. Strictly follow the relevant technical standards for high-strength large hexagonal head bolts, large hexagonal head nuts, and high-strength sealing rings. Production and processing of high-strength bolted joints prevents shoddy manufacturing and ensures the high strength of high-strength bolted connections.