The ultrasonic thickness gauge (UTG) serves many purposes in any factory. Examples include detection of internal corrosion in piping; rapid sorting of different thicknesses of parts; repetitive measurements for control charting; and thickness measurements in locations not reachable by traditional micrometers. In the press shop, the UTG now measures thickness strain as an alternative to applying and measuring circle grids. These applications are reviewed in the October/November 2004 MetalForming Science of Forming columns.
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