Spring common sense: what is the reason for the abnormal spring break?
Spring is one of the important parts in mechanical products. There are many kinds of it, according to their shape can be divided into: spiral spring, a plate (sheet) spring, disk spring, an annular spring, a plane (truncated) cochlear coil spring; according to the load characteristics can be divided into: compression, tension, torsion spring.
The stress of spring is mainly include: bending stress, torsion stress, tensile stress and compound stress.
Failure modes are: spring fracture, deformation, relaxation, wear. The main analysis is fracture and deformation (relaxation).
1 brittle fracture: most of the spring break belongs to brittle fracture. Only when the working temperature is higher, the plastic fracture can occur. The fatigue fracture, fracture stress corrosion cracking and hydrogen embrittlement is called brittle fracture in Engineering
2 fatigue fracture: the spring under the action of cyclic load.
3 stress corrosion cracking: under the common action of tensile stress and corrosion medium, the phenomenon of spring fracture is caused.
4 corrosion fatigue fracture: the spring in the cyclic load and corrosion media under the common action of the fracture.
5 hydrogen embrittlement, cadmium embrittlement and black brittle: because the spring material has high content of brittle fracture caused by impurities.
6 wear: wear and tear is divided into: abrasive, fatigue and corrosion wear and tear.