Preventive Measures for Failure of Heavy Hexagon Bolts

  • Heavy hex bolt is a kind of bolts, bolts, mechanical parts, cylindrical threaded fasteners with nuts. A type of fastener consisting of a head and a screw (cylinder with external thread), which needs to be matched with a nut to fasten and connect two parts with through holes. This type of connection is called bolt connection. If the nut is unscrewed from the bolt, the two parts can be separated, so the bolt connection is a detachable connection.


    There are many names for bolts, and everyone's name may be different. Some people call it a screw, some call it a bolt, and some call it a fastener. Although there are so many names, they all mean the same thing. They are all bolts. Bolts are the general term for fasteners. Bolts are tools that use the physics and mathematics of the oblique circular rotation and friction of objects to gradually tighten objects and parts.


    Bolts are indispensable in daily life and industrial production. Bolts are also called industrial meters. It can be seen that the bolts are widely used. The application range of bolts includes: electronic products, mechanical products, digital products, electrical equipment, electromechanical products.


    The performance grades of bolts for steel structure connection are divided into more than 10 grades such as 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, 12.9, among which grade 8.8 and above bolts are made of low-carbon alloy steel or medium-carbon steel and are heat-treated (Quenching, tempering), commonly known as high-strength bolts, the rest are commonly known as ordinary bolts. The bolt performance grade label consists of two parts of numbers, which respectively represent the nominal tensile strength value and the yield ratio of the bolt material.


    Preventive measures for heavy hex bolt failure: Check the newly replaced connecting rod bolts during each repair. Pay attention to whether there are cracks or dents on the head of the bolt, the guide part, and the threads, and whether the tooth shape and pitch of the thread are abnormal. If there is an abnormal situation, it should not be used. When assembling the connecting rod cover, use a torque wrench to tighten it according to the prescribed standards to prevent excessive or small torque. Use connecting rod bolts produced by supporting factories.


     

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