Plastic compression springs rotate up and down just like left-handed and right-handed screws. If it is plastic compression springs, left-handed and right-handed have the same amplitude, but the application is still dominated by right-handed tension springs; but if it is a torque tension spring, left-handed Right rotation is different, because the torque of the two is exactly the reverse.
How plastic compression springs differ from left-handed or right-handed: The identification method of plastic compression springs should be the same as that of external threads. The one on the left is left-handed, and the one on the right is right-handed!
1. Look at where the plastic compression springs are when they are placed straight, that is, which direction of rotation.
2. Cut along the radial axis, facing the front view, the one on the left is left-handed, and the one on the right is right-handed.
3. Hold the plastic compression springs tightly with your right hand, and the upper edge is in the same direction as the ring fingertip of your right hand, which is left-handed.
4. Hold the plastic compression springs tightly with your left hand, and the upper edge are right-handed in the same direction as the ring fingertip of your left hand.
Insufficient spring force. The requirement for springs is that a certain spring force must be created under the required deformation. Once the load is removed, the spring will be repaired to an arbitrary length, and the fitness piece will be smoothly changed to the set position. But sometimes it cannot be in place due to insufficient spring force.
There are processing elements in it. For example, during the whole process of stretching, the spring must get rid of the sliding friction between the ring and the ring, between the ring and the mandrel or sleeve specifications, and the sliding friction caused by the moving pair, and sometimes the sliding friction changes. Very large (up to ±50%), it will cause insufficient spring force, and cannot get rid of the sliding friction force to make the fitness moving parts in place, which will cause the spring to be ineffective. Therefore, it is necessary to strictly follow each process in the production process standard, such as selecting raw materials, forming springs, grinding off both sides, removing water chestnuts, quenching and tempering, a calibration adjustment, initial compression resolution, and oil testing.
Also, the spring force is related to design plan elements, material selection elements, and so on. From the two key calculation methods of the spring, namely the calculation of the deformation formula: λ=8PD32n/Gd4 and the calculation of the ground stress formula τ=K8PD2/πd3, it is known that the spring force is greatly affected by the diameter of the stainless steel wire, the diameter of the coil, the deformation and the number of turns. It is closely related to the characteristics of raw materials, working temperature, load characteristics, and the driving force, and can cause the spring force and deformation to be indicative.