2017 Almen Strip Consistency Testing Results
Author: Electronics Inc.
Source: The Shot Peener magazine, Vol 32, Issue 1, Winter 2018
Doc ID: 2018008
Year of Publication: 2018
Abstract:
QUALITY CONTROL TESTING SINCE 2007
Electronics Inc. (EI) developed a performance consistency
testing program on their A and N Almen strips in 2007 to
ensure they are consistent in thickness, flatness and hardness.
The purpose of EI’s testing program is to verify that the strips
will perform consistently, from lot to lot, from year to year.
TESTING METHOD
EI built an air blast cabinet with a variable speed rotary table
with 26 Almen strip holders, a fixture for adjusting nozzle
distance from the strips, a MagnaValve® for media flow rate
control, and controls to adjust air pressure and table rotation.
During testing, the table is rotated at a fixed speed, and the
cabinet is set for a specific pressure and constant media flow
rate so each strip passes under the blast nozzle at the same
angular velocity for the same predetermined number of
revolutions.
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