Electronics Incorporated - The Shot Peener - Shot Peening Library
Title: Metrology of Almen Arc Height Measurement
Author: Dr. David Kirk, Honorary Research Fellow at Covent
Source: TSP, Vol 22 / Issue 2, Spring 2008
Publication year 2008
Document number: 2008009
Number of pages: 6
Abstract:
Academic Study Dr. David Kirk
INTRODUCTION
Almen arc height measurement is very important to the shot peening industry. The primary application is for determining acceptable shot peening intensity which uses
ferromagnetic steel (SAE 107) strips. A secondary application, using paramagnetic aluminum alloy (2024-T3) strips, is for ensuring that excessive intensity is not applied
during aircraft paint stripping procedures. The mechanics of Almen arc height measurement are very well documented. Almen strips, holders and measurement gage requirements
are rigorously specified.
This article deals with the metrological principles of arc height measurement. The basic measurement components are the dial gage, strip holder and strip. Attention is
focused on the significance of hold-down forces and ball wear.
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