Band steel loop quantity adjusting method applied to band steel slitting line

Abstract

The invention specifically discloses a band steel loop quantity adjusting method applied to a band steel slitting line The method controls a set loop quantity and a set speed in a stable range by setting a photoelectric switch for detecting a loop depth range in a loop pit and using an industrial control system to work out a speed compensation quantity to dynamically adjust the running speed of front and rear band steels. The method comprises the following steps: 1) detecting a photoelectric signal; 2) comparing the photoelectric signal result with a truth table, and calculating a first speed compensation quantity delta Vs1 according to the comparison result; 3) detecting the actual speeds of tension rolls and a disc shear; 4) calculating a second speed compensation quantity delta Vs2 according to the detection result of the step 3); and 5) calculating the total set speed Vs of the tension rolls, and setting the Vs to the corresponding tension roll so as to adjust the effect of adjusting the front and rear loop quantities: for the front tension roll, Vs = V + (delta Vs1 + delta Vs2); and for the rear tension roll, Vs' = V - (delta Vs1 + delta Vs2), wherein the V is the standard set speed of the disc shear.

Description

technical field [0001] The invention relates to a production process of cold-rolled strip steel, in particular to a method for adjusting the amount of looper of strip steel applied to a strip steel slitting line. Background technique [0002] Cold-rolled strip slitting line is an important production line in cold-rolled strip production. It is mainly a continuous operation of slitting, coiling and trimming of cold-rolled strip. The production line is mainly composed of uncoiler, tension roller, disc shear, coiler, pinch roller, edge alignment device, loading and unloading trolley and other equipment. [0003] The main function of the cold-rolled strip slitting line is to complete the edge slitting of the strip so that its width can meet the design requirements, and at the same time it can trim the strip to improve the product quality of the strip. Disc shears are the main equipment for strip slitting. According to the maximum production speed and slitting precision of the c...

AI Technical Summary

Problems solved by technology

The advantage of the first method is high adjustment accuracy and good control performance. Its disadvantage is that the measurement accuracy of the looper height is relatively high, and the adjustment range is limited by the range of the measurement sensor for the looper height, generally between 0.5 meters and 1 meter. At the same time, the engineering cost of high-precision testing equipment is relatively high; the advantage of the second method is that the hardware equipment is simple, the engineering cost is low, and the adjustment range is not limited. The disadvantage is that the adjustment accuracy is not high, the control performance is poor, and it cannot be adjusted in real time. , and the discrete adjustment is easy to cause impact on the system, which is not conducive to the long-term operation of the system

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