Shot Peening & Blast Cleaning
A cold working process that uses small spherical media called shot. The shot bombards the surface of the part. During the shot peening process, each piece acts a tiny peening hammer, striking the surface of the part, imparting the surface a small dimple. The surface must yield in tension inorder to create the dimple. Below the surface, the material tries to restore its original shape producing a a hemisphere of cold-worked material highly stressed.
Blast cleaning uses a variety of materials including wire clippings, silicone carbide, ice, walnut shells, glass, baking soda, sand, and steel grit, depending on the surface which needs to be cleaned. The materials are directed with a jet of air, a rapidly moving wheel or similar system, at the surface to be cleaned. The focus and intensity can be adjusted to control how precisely the material is cleaned.
Shot Peening Applications Include (but are not limited to):
- Gear Parts
- Clutch Springs
- Coil Springs
- Suspension Springs
- Turbine Blades
- Surface Finishing on Engine blocks