Rolling control device and rolling control method

Abstract

PROBLEM TO BE SOLVED: To provide a feedforward thickness controller and its control method by which offset equivalent to lock-on thickness deviation is prevented from appearing in the thickness deviation on the outlet side even in the nose part of a material to be rolled where the effect of the feedback thickness control just after starting the thickness control is not expectable. SOLUTION: This controller is provided with a ramp function generating means 31 and an input correcting means 32. The input correcting means 32 outputs the output data of the ramp function generating means 31 to the feedforward thickness controlling means 33 from the start of thickness control until the output data of the ramp function generating means 31 becomes equal to the thickness deviation on the inlet side, and the thickness deviation on the inlet side is outputted thereafter. The feedforward thickness controlling means 33 controls a speed controlling means 7 and / or a screw-down location controlling means 8 by taking the output of the input correcting means 31 as the input.

Description

technical field [0001] The present invention relates to a rolling control device and a rolling control method, and particularly to a rolling control device and a rolling control method suitable for feedforward thickness control in thickness control. Background technique [0002] In the plate thickness control (AGC: Automatic Gauge Control) of the rolling mill for rolling steel plates, the supporting computer is usually based on the plate width, plate thickness, hardness of the material to be rolled, the rated value of the motor driving the rolling mill, and the load. Setting, etc., calculate the rolling program, and set the target plate thickness at the exit side of the rolling mill, the rigidity of the rolling mill (mill), and the influence coefficient of the material to be rolled with respect to the plate thickness control device. [0003] If rolling is started, the plate thickness control device measures the plate thickness of the rolled material by the plate thickness me...

AI Technical Summary

Problems solved by technology

Although this method has the effect of reducing the failure of the front end and preventing slippage, it cannot eliminate the deviation of the above-mentioned thickness deviation of the exit side

In addition, in Japanese Patent Laid-Open No. 11-77125 (especially paragraphs 0021-0053, Figures 1-10), although it is disclosed that the actual thickness of the inlet side and the actual thickness of the outlet side are monitored, and the influence coefficient used for correction by FFAGC is disclosed. The plate thickness control method, but this method cannot remove the offset of the plate thickness deviation on the exit side

[0009] In the existing technology, when the automatic tracking thickness value is used as the reference value of the entry-side thickness control, it is impossible to avoid the deviation of the exit-side thickness deviation corresponding to the entry-side thickness deviation during automatic tracking.

Therefore, the offset cannot be eliminated until the effect of the feedback plate thickness control occurs

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