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.
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