Compression spring is a wire forming spiral geometry hardware accessories. Therefore, the hardening and strengthening of the compression spring is much more difficult than flat hardware. In addition, the hardening effect of compression spring cross section should be strictly controlled. In order to fully understand the compression spring after the application of fatigue fracture resistance.

Compression spring design production

According to the actual commodity requirements, according to the standard selection of spring materials.

According to the commodity force and compression travel, fatigue and other provisions. Determine the inner and outer diameters of the pressure spring and its effective winding number. And the diameter of the line. Substitute the relevant parameters into the design parameter formula.

It is both reasonable and feasible to specify the design and production of springs for manufacturers.

Compression spring strengthening process

Shot peening and hard compression spring treatment: in order to handle multiple pressure springs, the compression spring is transported to the shot blasting chamber according to the separated conveyor belt, and a set of parallel bar rolls are arranged in the shot blasting chamber. Drive the compression spring edge forward rotation, such rotation according to the high-speed particles through the compression spring in the middle of the spiral method. The metal surface of the impact inner ring is where the stress of the compression spring is concentrated, and shot peening is a better way to strengthen the suspension spring. The fatigue life of the high stress spring can be increased by more than 4 times after the appropriate shot peening treatment.

Quality specification for compression springs

1. Appearance quality: the surface quality of the compressed spring commodity shall be smooth, free from cracks, oxidation scale, corrosion and other defects. The cold coil spring shall not have dents, pits or scratches whose depth exceeds half the material diameter tolerance.

2, material: compression spring material is 65 mn steel wire, or a set of Ⅰ and Ⅱ carbon spring steel wire.

3, hardness: after quenching and tempering, the hardness value of the cold coil tube spring should be between 44 and 52 HRC. Under special conditions, the hardness can be extended to 55 HRC.

4. Processing density.