The Peenscan process is ideal for measuring uniformity
and extent of coverage on a shot peened part.
Determining shot peening coverage on softer materials
can be fairly easy because the dimples are quite visible.
A 10-power (10X) magnifying glass is more than adequate
for these conditions.
However, in many applications determining shot peening
coverage is more difficult. Internal bores, tight radii,
extremely hard materials and large surface areas present
additional challenges in determining coverage. Metal
Improvement Company developed the Peenscan process for
this reason.
We apply the fluorescent tracer liquids used in the
Peenscan process by brushing, spraying or dipping it
onto a part and allowing it to dry. This forms a fluorescent
elastic coating, which is removed at a rate proportional
to the percentage of shot peening coverage. By examining
the part under UV (black) light, the Peenscan process
provides a practical method of determining peening coverage
in terms of the amount and uniformity of fluorescent
tracer removal. The Peenscan process has proven to be
clearly superior to inspection using a 10X glass alone.
The Peenscan tracer liquid coating responds to all intensity
ranges. Low angle of shot impingement or low shot peening
coverage will not remove all of the Peenscan tracer
coating. Uneven peening and hot spot concentration can
be seen easily by patterns on the remaining coating.
Many aerospace, automotive and industrial manufacturers
approve the use of the Peenscan process. |
