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Anti-loosening method for steel bar connection sleeve fasteners


Shanghai Hufeng Machinery Co., Ltd. specializes in the production of steel bar straight thread sleeves, with cheap prices, good quality, and complete qualifications. The following is an introduction to the anti-loosening method of the fasteners of the steel bar connection sleeve.
Friction and anti-loosening
It is the most widely used anti-loosening method. This method generates a positive pressure that does not change with the external force between the thread pairs to generate a frictional force that can prevent the relative rotation of the thread pairs. This positive pressure can be achieved by pressing the thread pair axially or simultaneously in two directions. Such as the use of elastic washers, steel connection sleeves, self-locking nuts and nylon insert lock nuts, etc. This anti-loosening method is more convenient for the disassembly of the nut, but in the case of shock, vibration and variable load, the pre-tightening force of the bolt will decrease due to relaxation at the beginning, and the lost pre-tightening force will increase slowly with the increase of the number of vibrations. Eventually, the nut will loosen and the threaded connection will fail.
Mechanical anti-loosening
The relative rotation of the thread pair is directly restricted by the stopper. For example, cotter pins, series steel wires and stop washers are used. Since the stopper has no pre-tightening force, the anti-loosen stopper can only work when the nut is loose and retreats to the stop position. Therefore, this method does not actually prevent loosening but prevents falling off.
Riveting and anti-loosening
After tightening, punching, welding, bonding and other methods are used to make the thread pair lose the characteristics of the kinematic pair and the connection becomes a non-detachable connection. 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 disassembly.
Structure anti-loosening
It uses the structure of the thread pair itself, that is, the Down's thread anti-loosening method.