On-line Obtaining Method of Plasticity Coefficient of Cold-rolled Strip Steel
A plastic coefficient, cold-rolled strip technology, applied in the direction of metal rolling, metal rolling, rolling mill control devices, etc., can solve the problem of large thickness error of strip steel, and achieve the problem of large error of strip steel thickness and shorten calculation interval Effect
Active Publication Date: 2017-11-17
WISDRI ENG & RES INC LTD
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Problems solved by technology
[0013] The invention provides an online acquisition method for the plastic coefficient of cold-rolled steel strip, to at least solve the change of the plastic coefficient of the strip steel caused by various factors in the related art, such as environmental factors, strip steel speed, and strip steel width, so as to solve the problem of the thickness of the strip steel big error problem
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[0052] Embodiments of the method for obtaining the plasticity coefficient of cold-rolled steel strip online according to the present invention will be described below with reference to the accompanying drawings. Those skilled in the art would recognize that the described embodiments can be modified in various ways or combinations thereof without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims. Also, in this specification, the drawings are not drawn to scale, and like reference numerals denote like parts.
[0053] According to one aspect of the present invention, there is provided an online acquisition method of plastic coefficient of cold-rolled strip steel, such as figure 1 shown, including the following steps:
[0054] Step S10 measures the actual value of the entrance strip thickness and the exit strip thickness actual value, and calculates the redu...
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The invention provides a method for online acquisition of the plasticity coefficient of cold-rolled strip steel. The method for online acquisition of the plasticity coefficient of the cold-rolled strip steel comprises the following steps that the actual thickness value of the strip steel at an inlet and the actual thickness value of the strip steel at an outlet are measured, and rolling reduction is calculated by combining the measured data with a set thickness value of the strip steel at the inlet with a set thickness value of the strip steel at the outlet; a velocity compensation factor is calculated according to the actual velocity value of the strip steel at the outlet, the rolling force is corrected according to the velocity compensation factor, and the plasticity coefficient of the cold-rolled strip steel is calculated preliminarily according to the rolling reduction and the corrected rolling force; and the preliminary value of the plasticity coefficient is compensated according to the actual width of the strip steel, and smoothening is conducted. According to the method, a programmable logic controller (PLC) is used for real-time online calculation of the plasticity coefficient of the cold-rolled strip steel, the influences of the outlet velocity of a rolling machine and the actual width of the strip steel on the plasticity coefficient are considered, and the plasticity coefficient is compensated so that the calculation precision of the plasticity coefficient can be improved to a large extent, and accordingly the performance index of thickness control of the rolling machine can be improved.
Description
technical field [0001] The invention relates to the technical field of cold-rolled strip steel production, in particular to an online acquisition method for the plasticity coefficient of cold-rolled strip steel. Background technique [0002] At present, the automatic thickness control system, referred to as AGC, is widely used in the control system of cold rolling mills. AGC can include a variety of control methods. The calculation formula of AGC roll gap adjustment in these three ways is: [0003] Feedforward AGC: [0004] Second flow AGC: [0005] Monitor AGCs: [0006] In the formula, ΔS FF , ΔS MF and ΔS MO Respectively, feed-forward, second flow and monitoring AGC roll gap adjustment, ΔH is the entrance thickness difference, Δh MF Calculate outlet thickness difference for second flow rate, Δh MO In order to monitor the thickness difference at the outlet, PI and IC represent proportional-integral controller and integral controller respectively, and K M is ...
Claims
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IPC IPC(8): B21B37/16B21B38/04
CPCB21B37/165B21B38/04
Inventor 陈跃华
Owner WISDRI ENG & RES INC LTD