Manufacturing process of cold formed spring

When using materials that do not need to be quenched and tempered to make a spring after forming, the process is
Spiral compression spring: coiling, stress relief annealing, grinding on both ends, (shot blasting), (aligning), (stress relief annealing), standing or pressure treatment, inspection, surface anticorrosion treatment, packaging.

Spiral tension spring: coiling, stress relief annealing, hook and loop production, (tail trimming), stress relief annealing, standing treatment, inspection, surface anticorrosion treatment, packaging.

Spiral torsion spring: coiling, stress relief annealing, torsion arm making, tail trimming, stress relief annealing, standing treatment, inspection, surface anticorrosion treatment, packaging.

The manufacturing processes of the spiral tension and torsion springs described above are all the hook loops or torsion arms at both ends after being wound on the ordinary coil spring. In recent years, many domestic and foreign manufacturers have produced and used computer forming machines or special forming machines, spring body and tail shape

The shape can be completed on the forming machine at one time, eliminating the need for processing shackles or twisting arms.

When using materials that need to be quenched and tempered after forming, the main difference from the above process is that they need to be quenched and tempered after forming. Sometimes the spring end processing needs to be normalized.

The process with brackets is a non-fixed process, and whether it is performed depends on the performance requirements of the spring.