DRIVE CONTROL METHOD TO DISC SHEARS OF LOOP-FREE AGGREGATE FOR SLITTING COILED ROLLED STRIP Russian patent published in 2006 - IPC B21B37/00 

FIELD: procedures for working coiled rolled strip after rolling it, namely loop-free aggregates for slitting rolled strips, particularly systems for controlling drive unit of circle shears of aggregate.

SUBSTANCE: method for controlling circle shears drive unit of aggregate for slitting coiled rolled strip including coiler, circle shears and uncoiler comprises steps of setting speed and torque moment of circle shears motor depending upon parameters of strip; at guiding strip to coiler (while cutting lead end of strip coil in front of coiler before tensioning it by means of coiler) measuring and storing moment of circle shears motor; after guiding strip to coiler and creating tension of strip by means of drive units of coiler and uncoiler setting revolution number of shears motor more than set speed of strip and setting moment of motor equal to value stored at guiding strip; at next process of cutting strip measuring real moment of circle shears motor and if it is less than of set moment value, lowering set value till measured real value. At cutting process also values of strip tension at side of coiler and uncoiler are measured for calculating their difference and storing its value at beginning of strip cutting with working speed. At each decrease of set moment value of motor depending upon measured real moment in case when said difference exceeds its stored value, increasing set moment of shears motor but no more than real moment value.

EFFECT: improved accuracy for setting moment of circle shears motor, enhanced quality of shearing rolled product.

2 cl