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How much do you know about the correct use of high-strength bolts?

Release Time:

2022-10-21

How much do you know about the correct use of high-strength bolts?

Bolts made of high-strength steel, or bolts that need to be used with greater force, are called high-strength bolts. High-strength bolts are a special type of bolts, and there are certain usage methods and precautions. Do you know how to use this kind of bolt correctly?
1. Before installation of high-strength bolts
Before installation, it is necessary to clean up the oil stains, rust, burrs, welding tumors, dust and other impurities attached to the surface of the bolt surface, so as not to affect normal use. Before installation, it is necessary to check whether the connecting parts between them are deformed or otherwise damaged. The treated contact surface should meet the specified anti-slip coefficient standards, and should be equipped with corresponding nuts, washers and other parts during use, which are used together and cannot be replaced with each other.
2. When installing high-strength bolts
During installation, the surface of the component should be kept dry, free of moisture and installed in a humid place to avoid damage to the parts. During installation, operate according to the requirements, and it is forbidden to directly hammer the bolts to prevent damage to the bolts caused by brute force.
3. Use of supporting equipment
When using the electric wrench, it should be regularly checked and tested to see if it meets the standards, and twisted several times according to the required operations when using it. When using a movable wrench, keep the size of the wrench and nut used matching, not too large or too small, to prevent damage to the bolts and poor use effect. In special cases, such as working at heights, a dead wrench should be used. If a live wrench is really needed, it needs to be used with the rope tied firmly to ensure the safety of the operator. When the steel structure is connected and assembled with the bolts, it is forbidden to reach out with your hands to explore, and to take or put the iron gasket. The correct way is to place your fingers on both sides of the iron plate to operate to ensure that nothing goes wrong.
4. Maintenance and maintenance
In order to prolong the life of the bolts and ensure the use effect of the bolts, the construction personnel should classify and use the high-strength bolts, operate them according to the correct use method, and regularly maintain and repair them, so as to maintain the best use of the high-strength bolts. Effect and period.
High-strength bolts are a special type of bolts that need to be used in the correct way. When using this type of bolt, be sure to follow strict operating instructions for use and installation, and select matching equipment for use. Regular maintenance and maintenance are required to ensure the benign application of high-strength bolts. The above is the correct use of high-strength bolts, do you understand?

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What are the classification and use of high-strength bolts?

High-strength bolts are special bolts made of high-quality carbon steel or low-alloy steel. They are called high-strength bolts because of their high strength. High-strength bolt connections have the advantages of simple and fast installation, good mechanical performance, assembly and disassembly, high pressure bearing, safety and reliability, etc. High-strength bolts are a new type of steel structure connection method developed after riveting connection, and have now developed into one of the main means of steel structure connection today. 1. Classification of high-strength bolts High-strength bolts can be divided into two types: large hexagonal head type and torsion shear type in appearance; if they are divided into 8.8, 10.9, 12.9, etc., according to the performance grade, the large hexagonal head high-strength bolts currently used in our country have 8.8 and 10.9 grades, while the torsion shear type high-strength bolt strength bolt is only 10.9 grades. The large hexagonal head high-strength bolt connection pair consists of a bolt, a nut and two washers (the screw head and the nut each have a washer): the torsion shear type high-strength bolt connection pair consists of bolts, nuts and washers. When bolts, nuts and washers form a connection pair, their performance levels must match. 2. According to the connection method, high-strength bolts can be divided into three types: friction connection, tensile connection and pressure connection. Friction connection and pressure-bearing connection are both shear connection. Bolt friction connection trans