Spring is a kind of elastic mechanical material with large elasticity and easy deformation. Within the limit of the spring limit, its elastic force is in direct proportion to the spring elongation, following Hooke's law, f = KX. The following describes the characteristics of the spring:
1. Mitigate impact and absorb vibration: this type of spring has large elastic deformation capacity and can absorb vibration and impact. Such as buffer springs in automobiles and trains, vibration absorbing springs in couplings, etc.
2. Movement of control mechanism: this kind of spring requires little change in force within a certain deformation range. Such as valve springs in internal combustion engines, control springs in clutches, and springs in cam mechanisms of automatic machine tools.
3. Energy storage: this type of spring requires both greater elasticity and stable force. Such as clock spring, gun spring, spring in automatic tool holder automatic return device in automatic machine tool, etc.
4. Measuring force: this type of spring requires a linear relationship between force and deformation. Such as springs in dynamometers and spring scales.
1、 What are the characteristics of coil springs
The coil spring is only an energy accumulator. It has the function of storing energy, but it cannot release the energy slowly. To realize the function of slowly releasing, it should be realized by "Spring + large transmission ratio mechanism", which is common in mechanical watches. Coil springs have been used a long time ago. Ancient bows and crossbows are two kinds of coil springs in a broad sense.
Coil spring is a widely used spring in mechanical springs. It is named after the metal wire is wound into a spiral shape. The "gb1239-1976 ordinary coil spring" in the national standard is applicable to the cylindrical coil spring with circular cross-section materials of cold coil and hot coil, compression, tension and torsion, and its wire diameter is generally 0.2-50mm. According to the provisions of this standard, the cylindrical coil spring of circular cross-section material is divided into three forms: helical compression spring, helical tension spring and helical torsion spring.
2、 Precautions for springs:
Within a certain extension range, the spring can produce large elastic deformation when loaded, converting mechanical work or kinetic energy into deformation energy. After unloading, the deformation of the spring disappears and returns to the original state, converting the deformation energy into mechanical work or kinetic energy. In this process, the extension length is in proportion to the elastic force in a fixed ratio K (depending on the spring itself), which is called complete elastic deformation. If it exceeds this range, it will become generic deformation and cannot be recovered or completely recovered.