Hot rolled strip convexity on-line closed loop control method

A closed-loop control, hot-rolled sheet technology, applied in contour control and other directions, can solve the problem of low product crown control accuracy, and achieve the effect of improving crown control accuracy

Active Publication Date: 2016-01-27
SHANGHAI MEISHAN IRON & STEEL CO LTD
View PDF8 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the technical problems existing in the prior art, and provides a method for closed-loop control of hot-rolled strip crown, which solves the problem of low product crown control precision when rolling such products in current hot-rolling enterprises

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Hot rolled strip convexity on-line closed loop control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Embodiment 1: see figure 1 , an on-line closed-loop control method for hot-rolled strip crown, taking the production of strip steel with thickness Href=2.5mm and crown set value Pref=20um as an example:

[0047] 1. When the strip arrives at the entrance of the finish rolling unit, the finish rolling model calculates the set value of the roll bending force required for each stand of the finish rolling based on the temperature, thickness, width, material, and real-time roll shape of the strip steel. Bending roller setting value of F1~7 frame: 850kn, 670kn, 950kn, 540kn,, 640kn,, 720kn,, 814kn;

[0048] 2. After each frame of finish rolling bites the steel, the roll bending force of each frame is switched from the balance force to the set value of roll bending calculated by the finish rolling model;

[0049] The bending force of F1~7 frames is switched from the fixed balance force of 800kn to the bending set value, and the bending force feedback value of each frame is the...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a hot rolled strip convexity on-line closed loop control method. The method is characterized by comprising the following steps that (1) strip steel reaches an inlet of a finishing rolling unit, the required roll bending force set value of each rack of the finishing rolling unit is worked out through a finish rolling model according to temperature, thickness, width and materials of the strip steel and real-time roll shape of the rolls; (2) after each rack of the finishing rolling unit bites steel, the roll bending force of each rack is switched from balance force to the roll bending set value worked out through the finish rolling model; (3) during rolling of the finishing rolling unit, certain adjustment for the roll bending force is conducted according to change of the rolling force of each rack by means of the strip shape keeping function; and (4) the closed-loop control over strip steel convexity is added, during rolling of the finishing rolling unit, the adjustment value of the required roll bending force of each rack is worked out by means of a convexity-to-roll bending force conversion algorithm according to the deviation between the set value and a strip steel convexity feedback value real-timely detected by a finish rolling outlet profile gauge, the roll bending force of each rack of the finishing rolling unit is real-timely adjusted, and the closed-loop control over the strip steel convexity is achieved.

Description

technical field [0001] The invention relates to a closed-loop control method, in particular to an online closed-loop control method for hot-rolled strip crown. Background technique [0002] With the demand of the market, in order to achieve profitability, hot-rolled enterprises continue to expand their products to high-end products, and the precision of product quality control is getting higher and higher. In addition to the previously concerned thickness and width control precision, the convexity control precision of hot-rolled products also requires It is very strict, especially for high-end products such as automotive sheets and silicon steel. In addition to the high control accuracy of the product as a whole, it also requires high homogeneity of the product under the premise of high overall control accuracy, that is, the smaller the fluctuation of the control accuracy, the better. good. However, at present, the crown control of the strip in hot rolling enterprises is co...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/38
Inventor 张奉贤夏小明解彦春
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap