Method for controlling tension in a metal rolling mill

Details Method for controlling tension in a metal rolling mill Method for controlling tension in a metal rolling mill

G - Physics

05

D

G05D 15/01 (2006.01) B21B 37/52 (2006.01)

Patent

CA 2041492

PATENT BR-1523-F ABSTRACT A method is provided for controlling interstand tension by roll gap adjustment to reduce gage variations caused by unplanned rolling velocity changes wherein a signal proportional to the tension changes produced by deviations from the desired speed ratio of adjacent stands is used to modify the conventional tension error signal before the latter signal is used to control roll gap thereby discriminating between tension changes caused by mill stand or strip physical changes, which it corrects, and tension changes caused by unplanned speed disturbances, which it ignores instead of maintaining constant tension. The resulting system exhibits improved tolerance for imperfect stand speed control.

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