Release time：2020-01-16 18:44 Browse：
1. Structure and classification
Galvanized hexagon flange extension bolt, as the name suggests, by the bolt body, hexagonal head, flange and lengthened rod body four parts. The bolt body is usually made of high-strength alloy steel material to ensure sufficient bearing capacity and fatigue resistance; The hexagonal head is easy to tighten with tools such as wrenches; The design of flange increases the contact area between the bolt and the connector, disperses the stress, and improves the stability and sealing of the connection. The lengthened rod body is suitable for connection scenarios that require greater penetration depth, such as Bridges and building steel structures.
According to different materials, galvanized hexagon flange extension bolts can be divided into stainless steel, carbon steel and other types; According to the strength level, it can be divided into 4.8, 8.8, 10.9 and even higher strength levels to meet the needs of different working conditions.
Second, performance characteristics
1. ** High strength and durability ** : Made of high strength alloy steel, it can withstand large tensile force and shear force to ensure safe and reliable connection. At the same time, galvanized treatment effectively prevents the corrosion of the bolt surface and prolonging the service life.
2. ** Good sealing ** : The design of the flange makes the contact between the bolt and the connector closer, effectively preventing liquid or gas leakage, especially suitable for occasions with high sealing requirements.
3. ** Convenient installation ** : The standardized design of the hexagonal head makes the tightening and disassembling process of bolts simple and fast, and improves the work efficiency.
4. Wide adaptability ** : Due to its special structure and material, galvanized hexagon flange extension bolts are widely used in construction, Bridges, machinery, automobiles, ships and other fields.
Third, galvanizing process
Galvanizing is a key step to improve the corrosion resistance of bolts. Common galvanizing processes include hot dip galvanizing and electric galvanizing. Hot dip galvanizing is to immerse the bolt in the molten zinc liquid, and form a dense zinc-iron alloy layer through the chemical reaction between the zinc liquid and the bolt surface, which has excellent anti-corrosion properties. Electrogalvanizing is to deposit a uniform zinc layer on the surface of the bolt through electrolysis. In contrast, hot-dip galvanizing has a better anti-corrosion effect, but the cost is also relatively high.
4. Application field
Galvanized hexagon flange extension bolts play an important role in many fields because of their unique advantages:
- ** Construction field ** : Used for steel structure frame, curtain wall installation, bridge connection, etc., to ensure the overall stability and safety of the building.
- ** Mechanical field ** : As the internal connector of the machine equipment, it can withstand various forces and moments to ensure the normal operation of the equipment.
- ** Automotive Manufacturing ** : Widely used in engine, chassis, body and other key parts to ensure vehicle safety and durability.
- ** Shipbuilding industry ** : Used for the connection of hull structure, deck equipment, etc., to resist seawater corrosion and ensure navigation safety.
5. Installation and maintenance
** When installing **, ensure that the surface of the bolt and connector is clean and free of oil, and select the appropriate pre-tightening torque to tighten the bolt to avoid too tight resulting in breakage or too loose resulting in loose connection. At the same time, it is also necessary to pay attention to the installation direction of the bolt to ensure that the flange and the connector are closely fitted.
In terms of maintenance, regularly check the fastening state of the bolts and the status of the surface galvanized layer, and if loose or corroded phenomenon is found, it should be treated in time. For bolts exposed to harsh environments for a long time, it is recommended to replace them regularly to ensure the safety and reliability of the connection.
