The physical principle and practical application of the metal spring

The springs of the metal spring suspension system are most commonly used in circle springs because of ease of production, high performance efficiency and low price. The physical definition of a spring is to store energy, when we apply a fixed force to the spring, it will produce deformation, when we remove the force then the spring will have a tendency to restore the original, but the spring in the rebound of the magnitude of the soup will often exceed its original length, until there is friction al-wearresistance will slow down the spring rebound after the free shock soup, which slows the work of free spring shock soup is usually the task of the shock absorber.

The general spring is called a “linear spring”, that is, when the spring is forced, its compression deformation is in accordance with the physics of the “Tiger’s Law”: F -KX, where in which F is force, K is elastic coefficient, X is the amount of deformation. For example, a linear spring force of 40Kg will cause 1cm compression, after which each additional 40Kg force of 1cm will certainly increase the amount of compression. In fact, there are other pressures present in the suspended spring, even when the spring is fully extended, the spring is still under pressure to hold the spring itself on the car.

In the traditional spring, shock cylinder-type suspension design, the spring plays to support the body and absorb uneven road surface and other forces on the impact of the tire, and the so-called other forces here include acceleration, deceleration, braking, turning and other forces on the spring. What is more important is to maintain the continuous contact between the tyre and the road surface during the removal of vibration and maintain the track of the car. Improving the tyre’s contact with the road surface is our primary consideration in improving handling. Stainless steel spring.

The main function of the spring is to maintain the comfort of the car and keep the tire in full contact with the ground, the use of the wrong spring will cause a negative impact on the quality of the car and handling. Imagine if the spring is completely stiff, the suspension system will not work. When the car jumps on uneven roads, the tires leave the ground completely, and if this happens when accelerating, braking or turning, the car will lose track. If the spring is very soft, it is very pleasant to have a “sitting bottom” situation, that is, the suspension of the trip exhausted.

If the sitting bottom condition occurs at the bend, it can be regarded as the spring’s elastic coefficient becomes infinite (no compressed space), the body will produce an immediate weight shift, resulting in the loss of trace. If the car has a long shock-absorbing journey, then you may be able to avoid the “sitting bottom” situation, but the relative body will also become very high, and a high body means a high body center of gravity, the body center of gravity of the body has a decisive impact on the performance of the control, so too soft shock absorbers will lead to obstacles to handling. If the road surface is absolutely flat, then we don’t need springs and suspension systems.

If the road surface is more rugged, a softspring is required to ensure that the tire is in contact with the road surface, and the stroke of the spring must be increased. The hardness of the spring is determined by the degree of ruggedness of the road, the more rugged to the softer spring, but to be soft is a key issue, usually this requires the accumulation of experience, but also the factory and the team of important issues.