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US 5,546,779 AGranted
Interstand strip gauge and profile conrol
AssigneesDanieli United, Inc., International Rolling Mill Consultants, Inc.
InventorVladimir B. Ginzburg
Life of this patent
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AssigneesDanieli United, Inc., International Rolling Mill Consultants, Inc.
InventorVladimir B. Ginzburg
Estimating the term…
Method and means for maintaining uniform thickness and profile of a metal strip during hot rolling in a multi-stand hot rolling mill, comprising a two-position looper located between adjacent mill stands and movable between a strip threading position above the rolling pass line of the mill and a rolling position substantially in the plane of the rolling pass line, and a thickness and profile gage movable out of operative relationship with the looper when the looper is in a threading position and into operative relationship with the looper when the looper is in a rolling position, the gage adapted to project a measuring X-ray beam from the thickness and profile gage onto the strip during rolling and at an angle to the strip of substantially 90.degree., thereby minimizing measurement error due to variable angularity between the X-ray beam and the strip during rolling.
Apparatus for controlling the thickness and profile of a metal strip during hot rolling in a multi-stand hot rolling mill, comprising a looper operable in adjustable height and constant height modes located between two adjacent mill stands and movable between (a) a strip threading position in which the looper height is adjusted for providing constant strip tension during threading above a rolling pass line of the mill and (b) a rolling position in which the looper height is maintained constant with the strip substantially in the rolling pass line at an elevation optimum for strip profile control and in which position a desired strip tension is maintained, means to adjust the looper height in the strip threading position, means to control the looper at a constant height in a rolling position, and a thickness and profile gage adjacent the looper and including means to project an X-ray beam onto the strip during rolling of the strip, said thickness and profile gage being in operative association with the strip when the looper is in the lowered, rolling position and the means to hold the strip at a constant height during rolling is effective to maintain the strip at an angle of substantially 90.degree. to the X-ray beam during rolling of the strip, thereby minimizing measurement errors due to variable angularity between the X-ray beam and the strip.
A method of controlling the thickness and profile of a metal strip during hot rolling in a multi-stand hot rolling mill provided with a looper disposed between two adjacent mill stands and operable in an adjustable height mode and a constant height mode, comprising threading metal strip into the mill stands while adjusting the looper height above a rolling pass line of the mill and thereby maintaining constant strip tension in the threading position of the strip, and, after threading is completed, lowering the looper into a position substantially in the rolling pass line of the mill at an elevation optimum for strip profile control, moving a thickness and profile gage into operative relationship to the looper in the lowered position, projecting an X-ray beam from the thickness and profile gage onto the strip during rolling and maintaining the looper height substantially constant in such lowered position whereby the strip is maintained at an angle of substantially 90.degree. to the X-ray beam, thereby minimizing measurement errors due to variable angularity between the strip and the X-ray beam.
Dependencies are inferred from the claim text.