Visualization and Analysis of Media Speed

Author:  Dipl.-Ing. Volker Schneidau | Managing Director
Source:  The Shot Peener magazine, Vol 36, Issue 1, Winter 2022
Doc ID:  2022003
Year of Publication:  2022
Abstract:  
THE SURFACE EFFECTS of a shot peening process are mainly determined by peening media properties and the velocity and direction of the media particles relative to the surface. Because of the difficulties to determine impact velocity and angle, the U.S. engineer, John O. Almen, invented an alternative parameter to characterize the surface impact— the shot peening Intensity. While this parameter has been used for almost 80 years now, modern process control can substantially be supported by means of media speed analysis. Media velocity can be used to quantify the media impact as it represents the real process value. This approach is legitimate if media quality and impact angle can be considered as fully controlled. This is the case if media quality is well maintained and impact angle is reproducible by reliable nozzle alignment or robotized nozzle movement.