Classification and selection of standard fasteners
Writer： admin Time：2019-10-12 22:06
Fasteners for fastening connection is a kind of mechanical parts used, wide range of applications.
For instance, British, German and U.S. manufacturing.
Nut: with internal thread hole, the general shape of the flat hexagonal column was significant, there are cylindrical or flat side Chengbian cylindrical, with bolts, studs or machine screw for fastening connecting the two parts, making
Connection for fastening two thin metal components, making it a whole system out of components on the need to advance the hole, because of this screw has a high hardness can be directly screwed into the hole component, the component in
Unit area pressure and protect the connection part of the role of the surface is not damaged; another washer, but also plays a role in preventing the nut back loose.
Ring: for installation in machines, equipment, shaft groove or slot hole, shaft or hole plays a stop on the role of the parts move around.
Because the two parts together to make the separate parts of the rivet must be destroyed.
Assembly and connection deputy: assembly is the combination of the supply of a class of fasteners, such as a machine screw (or bolt, Self screws) and washers (or spring washers, lock washers) combined supply; vice refers to the connection some kind of special bolts, nuts and washers combination of supply of a class of fasteners, such as high strength steel with a hex head bolt deputy.
Fastener selection criteria
Selection of the applicable principles of conservation
Hex head, these products also in the band sets, perforated, with boss, work with a flange-shaped, the class did not have high mechanical properties visible, easy to wrench, tighten the larger may be imposed torque, broader application, such as the bearing surface with a convex surface or flange with washer, increasing the pressure side, a better locking performance, can be used for steel structure and important connection to the host structure.
Square head, the head area, to facilitate the wrench to tighten the turn, can be applied like large tightening torque, and easy to wring bald, used for relatively thick, often dismantling of the structure, but should not be used for moving parts.
Pan head, head size, head slotted so easy tool applied screw, used for low-intensity, low applied screw torque products, generally used for small household appliances such as size of the host product, specifications and more.
Fasteners selected according to different characteristics