What is the working status of compression springs?
Compression springs can be divided into static springs and dynamic springs according to their operating conditions. Static springs refer to springs that have a limited number of vibrations during the service period, such as safety valve springs, spring washers, weighing pan springs, constant load springs, mechanical springs, watch hairsprings, etc.
Dynamic springs refer to springs that vibrate more than 1×106 times during the service period, such as engine valve springs, vehicle suspension springs, shockproof springs, coupling springs, elevator buffer springs, etc. Tensile strength and stability are mainly considered when selecting materials for static springs, and fatigue, relaxation and resonance performance are mainly considered when selecting materials for dynamic springs.
The spring can be divided into three states according to the load condition: light load, normal load and heavy load. Light load refers to springs that bear static stress, low stress, and small deformation, such as springs for safety devices and springs for vibration absorption. The designed service life is 103 to 104 times.
The general load refers to a common spring with a design life of 105 to 106 times and a vibration frequency of 300 times/min. In the allowable stress range, the life is guaranteed 1×106 times, the lower the load stress, the longer the life.
The heavy load of compression springs refers to springs that work for a long time and frequently vibrate. For example, valve springs, air hammers, presses, and hydraulic controller springs have high loads and are often used at about 10% lower than the allowable stress. The service life is greater than 1×106 times, and the cross-sectional shape of the spring wire is generally 107 times. It is round, rectangular, square, oval and other shapes. The finished steel wire is usually delivered in rolls, or in straight strips.
Compression springs Springs used in different environments have different special requirements for steel wires. For example: springs working in corrosive media require good corrosion resistance; springs in precision instruments require long-term stability and sensitivity; springs in high-temperature environments require sufficient elastic limit and creep resistance.