Compression Springs

The full name spiral compression springs, referred to as compression springs or helical compression springs. In addition, the flat wire helical compression springs are called as die springs.

Typical helical compression springs are made of round wire and wound in a pitched manner, and some use square or rectangular wire. Due to the characteristics of buffering, there must be a distance between the coils in order to achieve its elasticity. The length of the springs when it is not under load is called the free height. When the springs are compressed until all the coils are in contact, the length is called the solid height.

For medium to large springs used in machinery, the ends must be flattened and ground into a flat surface to facilitate installation. This process is to first make contact (leveling) between the last coil of the coil and the adjacent coil, and then grind the end to make the contact with the mounting surface over 270°. For small wire diameter wires (wire diameters less than 0.02in or 0.50mm), only flattening is required without grinding. On special demand, there are also grinding for leveling, or simply cutting to the required length without end treatment.

The compression springs can bear axial compression load, and the pitch between the coils can provide different rigidity for the springs, which can effectively minimize resonance fluctuation and vibration. There are many types of compression springs, which are used as energy storage and release devices, and are the most common types of springs on the market.

Compression springs can be divided into right-handed and left-handed directions. The stress of the spring depends on the size, load and torsion. After the compression springs are compressed and released, it should return to its original height. If it is pressed further, the force of the load and the height of the springs should be maintained at a certain height, but in the first compression, the length will be shorter than the original height, so generally the compression springs are made longer than the original length. Some special compression springs will reach the desired height through the scragged process. The general appearances of compression springs are as follows: