Operating method for a rolling train

摘要

A control computer for a rolling train is supplied with prescribed stand parameters of a rolling stand of the rolling train. The control computer sets variables describing a rolling pass of the rolling stand that together with initial data of a flat piece to be rolled and the stand data describe the resultant roll nip and the asymmetry thereof. The initial data may be width, average thickness and average strength of the workpiece to be rolled. Based on the initial data, the stand data and the set variables an expected delivery taper and/or an expected strip sabre for the workpiece is determined. At least one of the set variables is manipulated to bring the determined delivery taper close to a desired delivery taper and/or the strip sabre close to a desired strip sabre. The manipulated variables are used to control rolling the workpiece piece.

主权项

1. An operating method for operating a rolling train for rolling a flat workpiece in a rolling stand of the rolling train, comprising:
providing stand data describing stand parameters of the rolling stand to a control computer for the rolling train; as part of a rolling schedule calculation, controlling set variables which describe the rolling of the flat workpiece in the rolling stand, the set variables being controlled in the control computer to set a roll nip of the roll stand and an asymmetry of the roll stand during the rolling of the flat workpiece in the rolling stand, the set variables describing a total rolling force, a rolling force difference between a drive side and an operator side, a screw-down difference between the drive side and the operator side, and an offset of the flat workpiece relative to a rolling stand center, the set parameters also including a parameter that sets an additional variable of the rolling stand that influences a rolling contour; providing initial data to the control computer, the initial data comprising characteristic variables for a width, an average thickness and an average strength of the flat workpiece; externally prescribing a taper strategy to the control computer; determining a rolling contour portion based on the total rolling force, the rolling force difference between the drive side and the operator side, the parameter that sets an additional variable of rolling stand, the width of the flat workpiece and the offset of the flat workpiece relative to the rolling stand center, the rolling contour being determined in the control computer; determining a tilt portion in the control computer, the tilt portion being determined based on the screw-down difference between the drive side and the operator side and a stand frame stretch difference between the drive side and the operator side; determining at least one of an expected delivery taper and an expected camber for the flat workpiece when the flat workpiece is rolled in the rolling stand using the set variables, the at least one of the expected delivery taper and the expected camber being determined in the control computer based on the rolling contour portion and the tilt portion, using the initial data, the stand data and a taper model; as part of the rolling schedule calculation, manipulating, by the control computer, at least one of the set variables to produce control information, the control information being produced in accordance with the taper strategy, such that at least one of a desired delivery taper and a desired camber are approximated by the at least one of the expected delivery taper and the expected camber; and transferring the control information from the control computer to a basic automation system of the rolling stand, such that the flat workpiece is rolled in the rolling stand in accordance with the control information.