What Are The Ways To Prevent Loosening Nuts?

Anti loosening nut is a common component in mechanical fasteners, which belongs to a type of fastening anti loosening nut. However, in order to avoid the nut from slipping loose during use, some anti loosening methods need to be used for fastening. Based on the summary, Xiaorui will tell you some anti loosening methods for anti loosening nuts.

What are the ways to prevent loosening nuts? Under normal circumstances, there are five common ways to prevent loosening nuts.
1. Friction prevents loosening. This method is the most widely used nut anti loosening method, which generates a positive pressure between the threaded pairs that does not change with external force, to generate a frictional force that can prevent the relative rotation of the threaded pairs. This positive pressure can be achieved by axially or simultaneously compressing the threaded pair in both directions. Such as using elastic washers, double nuts, self-locking nuts, and nylon insert locking nuts. This nut anti loosening method is relatively convenient for nut disassembly, but in the case of impact, vibration, and variable load, the bolt will initially loosen and cause a decrease in pre tightening force. As the number of vibrations increases, the loss of pre tightening force slowly increases, ultimately leading to nut loosening and thread connection failure.
2. Mechanical nut anti loosening. This method is based on the principle of using a stopper to directly limit the relative rotation of the threaded pair and prevent loosening of the nut. Such as using split pins, connecting steel wires, and stop washers. This method makes disassembly inconvenient.
3. Riveting to prevent loosening. After tightening the anti loosening nut, methods such as punching, welding, and bonding are used to make the threaded pair lose its motion characteristics and become a non removable connection. The disadvantage of installing the anti loosening nut in this way is that the bolt can only be used once and it is very difficult to disassemble. The anti loosening nut and bolt pair must be destroyed before disassembly.
4. Structural anti loosening. This method utilizes the inherent structure of the thread pair, namely the Tang's thread anti loosening principle.
5. Edge flushing method to prevent loosening. After tightening the nut, punch a point at the end of the thread to break it; Adhesive anti loosening is usually achieved by applying anaerobic adhesive to the threaded mating surface. After tightening the anti loosening nut, the adhesive can cure on its own, and the anti loosening effect is good. The disadvantage of this method is that the bolt can only be used once and it is very difficult to disassemble. The bolt pair must be destroyed before it can be removed.
A lock nut is a component that is screwed together with a bolt or screw to provide a fastening effect. It is a necessary part for all production and manufacturing machinery. A lock nut is a component that tightly connects mechanical equipment, and can only be connected together through internal threads, equivalent specifications of lock nuts and screws. According to the requirements, we can use the above anti loosening methods to tighten the anti loosening nuts.