Shot Peening Process Of Spring

1: Combined shot peening technology. Combination shot peening, also known as multiple shot peening process. Most economical processes employ secondary shot peening. This is achieved by using shot peening with different diameters. For the first time, larger pellets were used to obtain residual compressive stress and surface finish.

2: Stress shot peening process. The stress shot peening process is also a relatively classic shot peening process, just because it is difficult to apply to mass production, but in recent years, due to the rapid development of stress shot peening equipment, it has been widely used in the mass production of high-stress automotive suspension springs. develop. In particular, the combined application of stress-strengthened shot peening and other shot peening processes has a very good strengthening effect. The prestress of stress shot peening is generally set at (700-800) MPa. After stress shot peening, the peak value of residual stress can reach (1200-1500) MPa, thereby obtaining high fatigue strength.

3: The hot and strong pressing process of the spring The hot and strong pressing process is mainly used on the coil springs that require high resistance to permanent deformation, and is an advanced stabilization treatment process for preventing permanent deformation. In addition to significantly improving the resistance to permanent deformation, the hot pressing process can also improve the fatigue life.