Ultrasonic shot peening

In conventional shot peening, the kinetic energy of the shot is transferred to a component by means of compressed air. In ultrasonic shot peening, in contrast, the same effect is achieved by means of high-frequency ultrasonic waves. In the process, the shot is set into a random whirling motion inside a component-specific peening chamber to act on the component. The result of ultrasonic shot peening action essentially depends on the arrangement of the sonotrode relative to the component.

Major advantages afforded by ultrasonic shot peening:

It produces defined and reproducible residual compressive stresses.
It does not change the roughness of the surfaces to be peened.
It permits peening of filigree parts with thinner walls without causing deformation.
It considerably reduces material rollover at sharp edges.