A Method of Improving the Accuracy of Steel Coil Weight Calculation

Abstract

The invention provides a method for improving the calculation accuracy of the steel coil weight, adding a coil diameter calculation program with the outlet steering roller as the reference speed, when the strip steel thickness is ≥ 0.4mm, press D j =1.89×400×Pzl / Pj to calculate the coil diameter value; when the thickness of the strip steel is less than 0.4mm, press D j =K×1.64×600×Pzx / Pj to calculate the volume diameter value; according to m=π×(D j 2 -610 2 )×W×7850 to calculate the coil weight. K is the steering roller compensation factor, Pzl is the tension roller power value displayed by the code disk pulse counter, Pj is the coiler power value displayed by the code disk pulse counter, Pzx is the steering roller power value displayed by the code disk pulse counter, W is the belt steel width. The invention can eliminate the skidding phenomenon of the tension roller when the steel strip is thin or is repairing material, improve the calculation accuracy of the coil weight, narrow the gap between the actual coil weight and the calculated coil weight, and solve the problem of overweight or insufficient steel coils that has plagued enterprises for a long time. Heavy problems, reduce customer objections and processing workload.

Description

technical field [0001] The invention belongs to the field of electric automatic control, and in particular relates to a method for improving the calculation accuracy of steel coil weight of a cold rolling and recoiling unit. Background technique [0002] Since the recoiling unit of a cold rolling mill was officially put into production in 2006, there have been inaccurate coil splitting and weight determination, and the actual coil weight does not match the calculated coil weight. The operation of personnel brings a lot of inconvenience, and there are many objections raised by customers. [0003] The original design coil diameter calculation is to use the reference speed of the tension roller to calculate the steel coil diameter. The tension roller of the recoiling unit adopts a pressing method. When there is oil on the surface of the steel plate or the thickness of the plate is too thin, the tension roller will slip on the strip due to insufficient friction, the speed measu...

AI Technical Summary

Problems solved by technology

The tension roller of the recoiling unit adopts a pressing method. When there is oil on the surface of the steel plate or the thickness of the plate is too thin, the tension roller will slip on the strip due to insufficient friction, the speed measurement is unstable, and the speed is inaccurate. The processing workload and time are reduced, and the strip length cannot be accurately calculated, resulting in the phenomenon of overweight or underweight of the steel coil

In order to eliminate the discrepancy of roll weight and improve the qualified rate of products, although the measures of adjusting tension roll pressure and roll gap have been taken, the problem has not been solved.

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