First, permanent anti-loose method
Spot welding, riveting, bonding, etc. This method mostly smashes threaded fasteners during disassembly and cannot be reused.
Second, the friction anti-loose method
This is the most widely used method of anti-looseness. This method produces a positive pressure between the thread pairs that does not follow the external force, so as to produce a frictional force that can restrain the relative rotation of the thread pair. This positive pressure can be achieved by axially or simultaneously pressing the thread pair in both directions.
Third, riveting and anti-loose method
The hex bolts receive the punching point, welding, bonding, etc. after tightening, so that the thread pair loses its active side characteristics and the connection becomes a disconnection. The disadvantage of this method is that the bolt can only be used once, and the disassembly is very difficult, and the bolt must be detached to be detachable.
Fourth, mechanical anti-loose method
Use split pin, stop washer and string wire rope. The method of mechanical anti-loose is relatively reliable, and the method of mechanical anti-loose is used to deal with important joints.
