5 solutions for loosening the hex screw
Frequently, customers will ask Wang Hao Standard Parts Manufacturing Co., Ltd. how to prevent loosening of the hex screw? How can I solve it? In order to make the peace of mind for the majority of users, we have summarized five solutions.
1, friction and anti-loose
This is a widely used method of anti-looseness. This method produces a positive pressure between the thread pairs that does not separate from 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. Such as elastic washers, double nuts, self-locking nuts and nylon insert lock nuts. This kind of anti-loose method is convenient for disassembling the nut, but in the environment of striking, vibration and variable load, the bolt will fall due to the looseness at the beginning, and as the number of vibrations increases, the pre-tightening force lost is obtusely The increase will cause the nut to loosen and the threaded connection to fail.
2, mechanical anti-loose
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.
Spot welding, riveting, bonding, etc. This method mostly smashes threaded fasteners during disassembly and cannot be reused.
4, riveting and anti-loose
After tightening, the method of punching, welding, bonding, etc. is received, so that the thread pair loses the 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.
5, the structure is anti-loose
The structural anti-loose does not depend on the manpower outside the circle, but only depends on its own structure. The structure anti-loose method, that is, the Tang's thread anti-loose method, is also a good anti-loose method that is now started and has good results, but it is not known to most people.