What are the requirements for making inclined coil springs?

What are the requirements for making inclined coil springs?

Inclined coil spring is a kind of mechanical parts that work with elasticity. Under the action of external force, the parts made of elastic materials will deform under the action of external force. After the removal of external force, the original state will be restored. The types of skew ring springs are complex and diverse. They are divided by shape, including spiral skew ring springs, scroll skew ring springs, plate skew ring springs, special skew ring springs and so on. It is usually made of inclined coil springs. So, what are the requirements for making a slant coil spring?

1 high strength

In order to improve the fatigue failure and anti-relaxation properties of inclined coil spring, the material of inclined coil spring should have high yield strength and elastic limit, especially high yield strength ratio. Generally speaking, the elastic limit of the material is proportional to the yield strength, so the design and manufacturers of inclined coil springs always want the material to have a high yield strength.

2. Good plasticity and toughness

In the manufacturing process of inclined coil spring, the material needs to undergo different degrees of machining deformation, so the material is required to have certain plasticity. For example, the shape of the complex stretching and torsion of the carabiners and torsion arms of the inclined coil spring, when the radius of curvature is very small, in the processing of winding or stamping bending forming, the inclined coil spring material shall not appear cracks, damage and other defects. At the same time, when the inclined coil spring is under impact load or variable load, the material should have good toughness, which will be of great benefit to improve the service life of the inclined coil spring

3. Excellent surface condition and fatigue performance

Helical coil spring under the surface of the work stress, and fatigue failure often starts from the surface of steel wire, for use on important occasions of oblique ring spring such as valve spring, valve oblique coil spring and suspension coil spring were required to have millions of times, even tens of millions of times more long cycle life, it's on the material fatigue performance of the high demands are put forward. There are many factors affecting the fatigue performance of materials, such as the chemical composition of materials, hardness, purity of steel, surface quality and metallographic structure, especially the surface quality of materials.

4. Be strict with size

Many helical coil spring load requires a high degree of accuracy, such as valve of helical coil spring load deviation should not be greater than 5% of the specified load 6% or less, ring spring steel wire rope tension and compression, for example, when the steel wire diameter deviation was 1%, the load of deviation is about 4%, thus, the size of the strict precision to ensure the quality of the helical coil spring is also very important.

5. Good consistency.

On the material uniformity requirements is refers to the material chemical composition, mechanical properties, size deviation indicators such as uniformity and stability, if the performance of the material, will give the production of inclined coil spring brings great difficulties, geometric parameters such as size, hardness, load caused by dispersion, serious inhomogeneity and even cause the waste products.