1. Characteristics of compression springs

In fact, there is not a significant difference in the performance characteristics of domestic or imported compression springs. Firstly, in terms of service life, the compression spring has now increased its usage to around 1 million times. Secondly, due to the fact that the commonly used material for compression springs is generally stainless steel, their inherent rust resistance is quite outstanding. There may be some differences in the load of imported compression springs, but the difference is not significant.

2. Precautions for using compression springs

1) Compression springs cannot be used without guidance

If compression springs are used without guidance, it is easy to cause twisting and deformation of the bottom and main parts of the spring, which in turn can generate high pressure and cause deformation or even fracture of the entire spring. Therefore, when using compression springs, it is important to confirm that guiding devices such as inner diameter guide pins or outer diameter guides are installed.

2) Do not exceed the large compression amount of the compression spring

This note is relatively easy to understand. If a load exceeding its large compression amount is applied to the compression spring, it will increase the spring number of the compression spring itself, resulting in an increase in the load curve. Under high pressure, the spring is prone to fracture.

3) Do not use compression springs without preloading

The key to not using compression springs without preloading is the issue of clearance. If there is a gap between the spring and other components, the spring itself will vibrate up and down with the expansion process, which may cause distortion of the spring structure. Only by applying pre pressure can the running process of the spring be relatively stable.

4) Do not use compression springs when containing foreign objects

The part of the compression spring containing foreign objects will cause the effective coil part of the spring to have no effect, and only the other parts are achieving the compression effect. As the actual effective number of coils of the spring decreases, high stress will form inside the spring and it is highly likely to cause fracture. Therefore, it is necessary to remove foreign objects from the compression spring during use.

5) Do not use compression springs on uneven assembly surfaces

Simply put, insufficient parallelism of the assembly surface can cause high stress locally in the torque of the compression spring, which can easily lead to damage or fracture after prolonged use.

6) Compression springs cannot be stacked for use

Compression springs, when used in combination, can cause the spring to bend and exceed the height of the guide pin or countersunk hole. Over time, there may also be instances of spring breakage.

7) Pay attention to the clearance between the inner diameter of the compression spring and the guide pin

When the gap between the inner diameter of the compression spring and the guide pin is too small, it can cause excessive wear of the spring, which can accumulate to a certain extent and cause fracture. On the contrary, if the gap between the inner diameter and the guide pin is too large, it will cause the compression spring to twist and break. Therefore, the gap between the inner diameter of the spring and the guide pin is approximately -1.0mm, which is suitable.

8) Pay attention to the outer diameter of the compression spring and the counterbore

When the gap between the compression spring and the counterbore is too small, excessive compression of the spring will cause its outer side to swell, and friction with the counterbore will cause the problem of force concentration. A good counterbore diameter is approximately within the range of compression spring outer diameter plus 1.5mm.