Patent ID: 6625515
Filing Date: 2003-09-23
Classification: G01N

Abstract:
A method for inspecting a mill roll used for producing flat rolled metal strip and for disposition of a mill roll of predetermined type and in service on a predetermined mill stand as a function of defect classification of any defects detected in said mill roll, the method comprising the steps of:a) applying a nondestructive inspection system to generate variable amplitude output voltage signals corresponding to changes in physical properties along a reference direction for at least a portion of the mill roll, any said changes in physical properties corresponding to a mill roll defect; b) defining an output voltage signal pattern from said variable amplitude output voltage signals; c) classifying said mill roll defect in accordance with predetermined patterns of output voltage signals to assign a defect classification; d) selecting a threshold signal value corresponding to said defect classification for the type of mill roll being inspected on said mill stand; e) calculating a difference between a maximum peak height for the output voltage signals and said threshold signal value; and f) defining corrective action for disposition of the mill roll in accordance with said calculated difference.