The basic idea of the methods is plastic deformation of material by applying a relatively small force so that a
hardened layer on the surface exists. Roller Burnishing, Shot Peening, LPB (Low Plasticity Burnishing) are such methods.
art of roller burnishing
Surface operations by “Cold Working” are applied in order to: 1. Improve the surface finish, 2. Improve the fatigue life, 3. Improve the size control.