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Title: Method of Calibrating Gages Used In Measuring Intensity of Shot Blasting
Author: Jack M. Champaigne
Source: US Patent 6,289,713 B1
Publication year 2001
Document number: 2001001
Number of pages: 7
Abstract:
A method for calibrating a gage for measuring shot blast intensity having an indication mounted on a platform adjusts the calibration of the indicator to compensate for
variations of positioning of the Almen test strip supports on the platform. After verifying that the test strip supports are within tolerance by use of "go-no go" gages, the
indicator is mounted on the support and calibrated by using a notch calibration block to first set the zero datum of the indicator and then to make a calibration reading of
the depth of the notch. If the reading is within specifications, the notched calibration block is removed, and a calibration block having a curved surface simulating the
curvature of an Almen strip to be measured by the Almen gage and having a known maximum deflection is installed on the gage and the indicator used to measure the deflection.
If the measured deflection is within tolerance limits of the known actual deflection, the indicator is recalibrated to read the actual deflection. By calibrating gages in
this manner, all gages at a facility which have been calibrated by using the same calibration blocks will read the same, thus eliminating inconsistencies between gages.
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