High strength bolt and common bolt, high strength bolt than ordinary bolt what are the advantages?

by:MPS     2020-07-25
< P> high strength bolt connection is simple in construction, mechanical performance is good, removable, fatigue resistance, as well as the advantages of under dynamic load is not loose, is a promising method of connection. High strength bolt is to use special wrench to tighten the nut, the bolt generate huge and controlled method, through the nut and plate, to be fitting pressure also produced the same size. Under the effect of preloading, along by fitting the friction surface can produce larger, apparently, as long as the axial force is less than the friction force, component will not slip, connection would not be damaged, this is the principle of high strength bolt connection. High strength bolt connection is established by fitting the friction between the contact surface to prevent slip of each other, to make the contact there is enough friction, we must improve the artifacts of clamping force and friction coefficient increase component interface. Component between the clamping force is accomplished by pre-tensioning at the of bolt, so the bolt must adopt high strength steel manufacturing, which is known as the cause of the high strength bolt connection. High strength bolt connection, a great influence on the bearing capacity of the size of the friction coefficient. Experiment shows that the friction coefficient was mainly affected by interface and artifacts, in the form of material. In order to increase the contact area of the coefficient of friction, often in the construction methods such as sand blasting, use wire brush to clean up the connection within the scope of component interface for processing. Ordinary bolt with high strength bolts of the mechanical properties and calculation methods are different. The stress of the high strength bolt pre-tensioning at the first is through its internal P, then the fitting between the contact surface friction resistance to withstand the load, and the ordinary bolt is directly under external load. < / P> < P> < / P>
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