The article reveals the concept of bolting, screw connection.The main fasteners.
Main threaded fasteners - screws, bolts, nuts and studs.Bolt called article in the form of a cylindrical rod which has at one end external thread, and the head under the key - on the other.Mounting is due to the nut or threaded hole in the connected product.Details bolting - is itself a bolt, nut and washer.
washer serves to protect the surface of the part of the damage that could be caused by rotating parts of bolts and nuts, as well as to prevent the unwinding of the connection.
For multiple product assembly and disassembly of products without compromising the integrity of their parts used bolt connection, which relates to a releasable connection.Its main advantage is that it does not require complex machining equipment.
Bolting is used for assembling parts of small thickness.To make the connection is sufficient to make cylindrical holes slightly larger diameter to freely pass through these bolt rods or damaging the threads.Bolted connection requires a lot of space, it increases the weight and dimensions of the structure.But if necessary, for example, in case of failure, it is easy to replace.It provides a significant reliability and structural strength.
Bolting can be done in two ways.First, in the opening parts to be connected, the bolt is inserted with clearance.Further tightening of the nut is carried out, which creates pressure between the parts - it interferes with their differences and shift under the action of axial and transverse forces arising due to friction.The second method is used less frequently, and is in tight joining bolt through the hole parts of the compound that does not occur under the influence of transverse shear forces.In this case, the opening part and the rod screws are processed with high accuracy, but thinner bolt is obtained when the same transverse force.
Manufacturing bolts made of a shaped rod, which can be hexagonal or another profile on machines or lathes.Bolt thread is cut or rolled on blanks, which are derived from the landing of a hot rod.The length of the thread bolt is directly related to the thickness of the washer, a height of the nut, the thread supplies above and below the joint.
Vint called cylindrical core which at one end has a thread and a head at the other conical, cylindrical or hemispherical shape.Compared to bolting the role of nuts in the screw connection is assigned to the latter by a connecting member, which runs a threaded hole.Other components of the compounds are between it and the screw head.Under a semi-circular or cylindrical head can be mounted washer.By appointment screws are divided into installation and fixing that is connecting.
Screw termination common and is often used in instrument.Details of the screw connections - for example, housing and Acceding detail, flange or cover.
When the screw connection the screw is screwed into the housing and requires little space, which reduces the weight and dimensions of the construction.However, when the thread in the housing assembly, if it is made of cast iron or aluminum, may be damaged.Therefore, when breakage is quite difficult to remove from the remainder of the screw thread.
Connection bolt and screw connection is standardized and interchangeable.Therefore, they are widely used in many branches of engineering for detachable connections.
