CONTINUOUS COLD ROLLING MILL OPERATION METHOD Russian patent published in 2003 - IPC

FIELD: plastic metal working, particularly production of cold rolled steel strips and sheets. SUBSTANCE: method is realized, mainly in four-stand or five-stand cold rolling mills for rolling steel strip of different width and at changing rolls of stands depending upon wear degree. At successive rolling of steel strips with width B and B + (200-300) mm when quantity of rolled narrow metal does not exceed 400 t, further rolling of wide strips is realized without changing of rolls. When quantity of narrow metal is less than 1500 t, rolls are changed in two last stands. When quantity of narrow metal exceeds 1500 t rolls are changed in all stands of rolling mill. EFFECT: enhanced efficiency, lowered cost price of high quality rolled strips. 3 ex