Hydraulic gauge control - for strip cold rolling mill by roll speed derived pressure gap control

摘要

In a cold rolling mill, the roll gap, roll pressure and screwdown rate ensures, independent of roll speed, a constant dead time for the strip thickness control circuit. The desired value of the screwdown rate is, for this purpose, fixed by the difference between desired and actual value of the roll gap and/or of the roll pressure, and the maximum desired value of the screwdown rate is fixed by the roll speed.