Automatic nondestructive roll defect inspection system

B - Operations – Transporting – 21 – B

Patent

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349/42, 324/50

B21B 27/00 (2006.01) G01N 27/90 (2006.01) G01N 29/00 (2006.01) G01N 29/04 (2006.01) G01N 29/22 (2006.01) G01N 29/27 (2006.01) G01N 29/28 (2006.01) G01N 29/44 (2006.01)

Patent

CA 1198203

PATENT APPLICATION OF ARCADE J. PLANTE RICHARD F. WETZEL FOR AUTOMATIC NONDESTRUCTIVE ROLL DEFECT INSPECTION SYSTEM ABSTRACT A computer-based eddy current nondestructive or ultrasonic testing system automatically inspects rolling mill roll surface defects during roll grinding operations comprising articulated probe means, eddy current, or ultra- sonic, test instrument means, computer means, display and printer means. The articulated probe mechanism is mounted on a traversing roll grinder carriage, is automatically positioned over the test roll in response to control means initiated by the grinder operator, and has a probe head with a controlled fluid bearing, air or liquid, to automatically maintain probe-head-to-test roll gap. One or multiple eddy current, or ultrasonic, probes in the test head generate anamoly test signals, which, together with a probe head temperature sensor signal, are processed in a modified test instrument and the computer. Computer plots defects signals as color bars vs. probe position and displays these bars graphically and other messages on a color CRT display and/or a graph printer. This system arrangement provides for effective roll surface defect inspection by grinder personnel, and others, who ordinarily are unskilled in NDT test and analysis methods. -1-

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