Preload and loosening prevention technology of slide bolt
Publish Time: 2024-12-17
Slide bolt, as an indispensable fastener in mechanical connection, its preload and loosening prevention technology are directly related to the stability and safety of the mechanical system. In various types of mechanical equipment, slide bolt not only bears the heavy task of transmitting load, but also needs to remain tightened in a complex and changeable working environment to avoid safety hazards caused by loosening.
Preload is the axial force generated by tightening the slide bolt during installation. It creates sufficient friction between the bolt and the nut, and between the bolt and the connected part, thereby preventing the bolt from loosening under external load. The size of the preload directly affects the reliability and durability of the bolt connection. If the preload is insufficient, the bolt is easy to loosen when bearing load; conversely, if the preload is too large, it may cause the bolt to be overloaded and broken, or even damage the connected part.
In order to prevent the slide bolt from loosening, a variety of technical means are used in engineering. A common method is to use spring washers or stop washers. After being flattened, the spring washer can generate a continuous elastic force, so that the nut and the bolt maintain a certain friction force, thereby playing a role in preventing loosening. The stop washer, through its special structure, is bent and fits on the side of the connector after the nut is tightened, effectively preventing the nut from rotating.
In addition, self-locking nuts are also an important tool to prevent bolts from loosening. Self-locking nuts are usually embedded with nylon rings or metal anti-loosening devices. When the bolts are tightened, these devices can generate locking force to prevent the nuts from loosening. For occasions that need to withstand large vibration or impact loads, auxiliary anti-loosening measures such as thread lockers or cotter pins can also be used.
It is worth noting that the effects of preload and loosening prevention technology are also affected by many factors, such as the material of the bolts and nuts, the processing accuracy of the threads, the material and shape of the connectors, etc. Therefore, in practical applications, it is necessary to select appropriate preload and anti-loosening measures according to the specific situation to ensure that the connection of the slide bolt is safe and reliable.
In summary, the preload and loosening prevention technology of the slide bolt is an indispensable part of mechanical design. By reasonably selecting the preload force, using spring washers, stop washers, self-locking nuts and other anti-loosening measures, the reliability and durability of the bolted connection can be significantly improved, providing a strong guarantee for the stable operation of mechanical equipment.
