Five working states of compression spring
The main raw material of compression spring is spring steel, which is used to control the movement of parts, mitigate impact or vibration, and store. The external force deforms the spring. When the external force disappears, the spring will return to its original state. Many tools and devices are reset by using the characteristics of springs. So, what are the operating states of the compression spring? In the following contents, Sreda has sorted out several operating states of compression spring for you:
Operating state of compression spring
(1) According to the actual working state, it can be divided into static spring and dynamic spring. In use, static spring generally refers to the spring with limited vibration times, such as safety valve spring, spring pad, scale spring, constant load spring, mechanical spring, watch hairspring, etc. The vibration number of the moving spring reaches 1 × 106 times, such as engine valve spring, automobile suspension spring, shockproof spring, coupling spring, elevator buffer spring, etc. When selecting materials for static springs, tensile strength and stability are mainly considered. When selecting dynamic springs, fatigue, relaxation, resonance and other properties are mainly considered.
(2) Spring can be divided into light load, normal load and heavy load according to load conditions. Light load is a kind of spring that bears static stress, low stress and small deformation, such as spring for safety device and spring for vibration absorption. The design life of the product is 103~104 times.
(3) Ordinary load refers to ordinary spring with design life of 105~106 times and vibration frequency of 300 times/min. Life assurance 1 × 106 times, the smaller the load stress, the longer the service life within the allowable stress range.
(4) The heavy load of pressure spring refers to the spring that works for a long time and often vibrates. For example, valve springs, air hammers, presses and hydraulic control springs have large loads, often 10% lower than the allowable stress, and their service life exceeds 1 × 106 times, generally 107 times. The section shape of the spring steel wire is generally circular, and also rectangular, square, oval and other shapes. The finished steel wire is generally transported in a roll, and also in a straight line.
(5) Pressure springs are suitable for different environments and have different special requirements. For example, springs working in corrosive media shall have good corrosion resistance; In precision instruments, the spring is required to be stable for a long time and high sensitivity; The spring has sufficient elastic limit and creep resistance under high temperature environment.
The above is about several working states of compression spring.
