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US 5,469,743 AGranted
Dynamic surface wave roll inspection device
OwnerRoger H. Zorninventor
Life of this patent
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Abstract
A method and apparatus is provided for dynamically inspecting rolling mill rolls to locate surface defects in the rolls by applying an ultrasonic shear wave circumferentially to a rotating roll, wiping liquid from the surface to remove surface contaminants, and sensing reflections representative of any roll surface defects.
Claims9
An apparatus for dynamically inspecting rolling mill rolls for surface defects by rotating the rolls and by using ultrasonic waves, the apparatus comprising:
- a housing having an arcuate bottom surface adapted to the contour of a roll surface to be inspected when placed adjacent the roll surface;
- an ultrasonic angle beam transducer positioned within the housing to generate an ultrasonic shear wave substantially circumferentially in the roll surface;
- means for wiping the roll surface downstream of the wave generator for cleaning liquid from the roll surface, said liquid being present to facilitate transmission of the ultrasonic wave into the roll surface;
- and
- means for sensing a pulse echo reflection from within the wiped roll surface upon detection of a roll surface defect.
2 more elements
A method for dynamically inspecting rolling mill rolls for locating surface defects using ultrasonic waves, the method comprising:
- rotating a roll to be inspected about its longitudinal axis;
- providing a liquid on the roll surface;
- wiping the liquid to provide a relatively clean dry surface;
- generating an ultrasonic shear wave generally circumferentially in the roll surface for detecting surface flaws in the clean dry roll surface;
- and
- sensing a pulse echo reflection from the roll surface upon detection of a roll surface defect.
3 more elements
Dependencies are inferred from the claim text.