WIDE STRIP HOT ROLLING MILL ROLLS OPERATION METHOD Russian patent published in 2006 - IPC B21B1/26 

FIELD: rolled stock production, namely tools for making wide strip hot rolled steel products.

SUBSTANCE: method comprises steps of mounting in preset stands new rolling rolls; discharging worn rolls; regrinding them at lowering their diameters and again mounting in stands. According to invention before regrinding process rolls of continuous final rolling stand group of mill are cooled for 2 - 3 h till temperature 45 - 50°C. In first four stands of said stand group reground rolls of second (according to order of arrangement) stand are mounted in first stand. Rolls of first stand are mounted in third stand and rolls of third stand are mounted in fourth stand. Roll diameters in each of first three stands is lowered by 1.02 - 1.03 times and in forth stand - by 1.04 times in comparison with diameters of rolls respectively of second, first and third stands. Reground rolls of sixth stand of final rolling stand group are mounted in seventh stand; rolls of seventh stand are mounted in fifth stand at successively lowering roll diameters by 1.02 times.

EFFECT: optimal mode of using rolls, increased useful life period of rolls due to using reground rolls in other stands of the same stand group of mill.

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