1、Friction-proof. This is the most widely used anti-loosening method, which produces a positive pressure that does not change with the external force between the thread pairs to produce a frictional force that can prevent the relative rotation of the thread pair.
This kind of anti-loosening method is convenient for disassembling the nut, but in the case of impact, vibration and variable load, the beginning of the bolt will cause the pre-tightening force to decrease due to slack, and the loss of pre-tightening force will increase slowly as the number of vibrations increases. Eventually it will cause the nut to loosen and the threaded connection to fail.
This positive pressure can be achieved by axially or simultaneously compressing the thread pair in both directions. Such as the use of elastic washers, steel connection sleeves, self-locking nuts and nylon inserts, such as lock nuts.
Rebar Rebar, Rebar Retaining Sleeve Fasteners Four Anti-loosening Methods Rebar Sleeving Sockets Slightly Loose? Of course not. It will affect the entire project. We must do our best to do things. Avoid accidents to avoid it happening. Guinness takes you into the world of locking fasteners.
2、Structural guarding. It is the use of the thread’s own structure, that is, Down’s thread locking method.
3、Mechanical protection. The relative rotation of the thread pair is directly limited by the stopper. Such as the use of split pins, series wires and retaining washers. Since the stopper has no pretightening force, the locking prevention member can only work when the nut is loosened to the stop position. Therefore, this method does not actually prevent loosening but prevents falling off.
4、Riveted against loosening. After tightening, punching points, welding, bonding, etc. are used to make the threading pair lose its motion-retaining property and the connection becomes inseparable. 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 broken to be disassembled.
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Post time: May-19-2018