Same-plate difference roll shifting feedforward static control method

Abstract

The invention discloses a same-plate-difference roll shifting feedforward static control method which is used for a five-rack tandem cold rolling mill, and a convexity meter is arranged at an inlet of a rolling mill unit and used for detecting the convexity value of hot-rolled incoming strip steel; when a weld joint reaches a convexity instrument, the convexity instrument feeds back a measured value of the convexity of the head of an incoming material to a unit process control computer, meanwhile, the convexity deviation of the head of the strip steel is calculated according to historical information of the convexity of the head of the strip steel with the specification, and working roll shifting compensation values of 1 # to 3 # racks are determined and conditionally output; according to the method, the same-plate-difference roll shifting feedforward static control technology meeting the requirement of a user for the same-plate-difference level is adopted based on cold continuous rolling unit inlet convexity instrument section detection, the roll shifting calculated value of each rack is subjected to real-time feedforward control, and the same-plate-difference control level of the cold-rolled strip steel is improved. The method can be applied to various multi-rack cold continuous rolling mill systems with different same plate difference control capability levels, so that the method can be widely applied to a cold rolling unit which adopts working roll shifting to carry out same plate difference control and is provided with a convexity meter in front of a rolling mill at present.

Description

technical field [0001] The invention relates to the technical field of metallurgical machinery / pickling and rolling, and in particular to a method for controlling roll shifting of a cold-rolling and continuous-rolling finishing mill. Background technique [0002] The edge drop of cold-rolled products (Edge Drop, referred to as edge drop, also known as edge thinning) is an important parameter of dimensional accuracy index. The traditional definition of edge drop is the difference between the thickness tA at the position 100mm from the edge minus the thickness tB at the position 15mm from the edge, Edge drop=tA-tB. [0003] However, with the continuous improvement of users' requirements for product quality, the traditional definition of edge drop has been difficult to meet the requirements. It often happens that when the control level of traditional edge drop fully meets the control requirements of the unit, it still cannot meet the user's requirements for cross-sectional shap...

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Problems solved by technology

2. Patent No. CN105436208A, title: edge drop control method in the rolling process, which mainly involves the use of the two control methods and the optimization of the adjustment amount when the roll bending control and roll shifting control are put into use at the same time The relevant content belongs to the selection and adjustment method of the edge drop control method, which is obviously different from the method of only implementing a specific control strategy for roll shifting to be realized in the present invention

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