Material requirements for making inclined coil springs

Material requirements for making inclined coil spring! Now let Duchenne to give you popular science!

1. High intensity

In order to improve the fatigue failure and anti-relaxation function of swash coil spring, the material of swash coil spring should have higher yield strength and elastic limit, especially high yield strength ratio. Generally speaking, the elastic limit of this material is directly proportional to the yield strength, so the design and manufacture of swash coil springs always expect this material to have a high yield strength.

2. Good plasticity and patience

In the manufacturing process of swash plate spring, materials need different degrees of processing deformation, so the material needs to have a certain degree of plasticity. For example, when the zigzag radius is very small, when the zigzag radius is very small, swash plate spring material in winding or stamping zigzag molding, should not show cracks, folding and other shortcomings. At the same time, when the swash plate spring is subjected to impact load or variable load, the material should have good tolerance, which has great benefits for the improvement of the service life of the swash plate spring.

3. Excellent appearance and fatigue performance

When the swash coil spring works, the surface stress is large, and the fatigue failure usually starts from the surface of the steel wire. In important occasions, the use of skew ring springs, valve skew ring springs, suspension skew ring springs and other skew ring springs, there are hundreds of thousands of times, thousands of times more cycle life, which puts forward high requirements on the fatigue performance of materials. There are many factors that affect the fatigue properties of materials, such as chemical composition, hardness, steel purity, appearance quality and metallographic structure, especially the appearance quality of materials.

4. Strict size

Many coil spring loads require a high degree of accuracy, such as coil valve spring load error should not be greater than 5% of the specified load 6% or less, ring spring wire rope tension and compression, for example, when the wire diameter error is 1%, the load error is about 4%, therefore, strict dimensional accuracy is also very important to ensure the quality of coil spring.

5. Good consistency

The uniformity of the material refers to the uniformity and stability of the chemical composition, mechanical function and size error of the material. If the performance of the material does not match, it will cause a lot of difficulties in the production of coil spring, forming the geometric size, hardness, load and other parameters of the product, such as serious dispersion, non-uniformity and even the formation of waste products.