Feedforward control method for cold rolled strip shape

A feed-forward control, cold-rolled strip technology, applied in the field of strip rolling, can solve the problem of not considering the strip shape stability at the entrance of the rolling mill and the influence of the strip shape at the exit of the rolling mill

Active Publication Date: 2016-04-20
NINGBO BAOXIN STAINLESS STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method belongs to the flatness feedback control method with the strip shape after rolling as the control target, and does not consider the influence of the strip shape at the entrance of the rolling mill on the stability of the rolling process and the strip shape at the exit of the rolling mill

Method used

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  • Feedforward control method for cold rolled strip shape
  • Feedforward control method for cold rolled strip shape
  • Feedforward control method for cold rolled strip shape

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] (1) Strip shape detection at the entrance of the rolling mill

[0048] Such as figure 1 As shown, the strip single-stand reversible cold rolling unit includes an entrance uncoiler / coiler 11, an entrance turning roll 21, an entrance contact pressure shape meter 31, a 20-roll mill 4, an exit contact pressure shape meter 32, and an exit turning roll Roller 22, exit uncoiler / coiler 12. Among them, the plate shape actuators owned by the 20-roll rolling mill 4 here include: 7 back-up roll crown adjustment mechanisms ASU 1 、ASU 2 ,...,ASU 7 , the upper and lower first intermediate roller axial movement mechanism SHIFT upper 、SHIFT down .

[0049] In this embodiment, the strip shape gauges at the entrance and exit of the rolling mill respectively detect and track and record the strip shape at the entrance and exit of the rolling mill and the corresponding length positions in real time.

[0050] (2) Calculation of feedforward shape deviation

[0051] For the first rollin...

Embodiment 2

[0114] The method of the present invention is applied to a newly added flatness automatic control system of a stainless steel 20-roll cold rolling mill. The system has a flatness feedback control function module and a flatness feedforward control function module, and one of the flatness control modules can be selected and input according to actual production needs. The shape control function module, or put into two shape control function modules at the same time. A set of contact pressure shapers are installed at the entrance and exit of the cold rolling mill of this unit.

[0115] For 300-series stainless steel, the inlet thickness is 2.6mm, the width is 1260mm, and the outlet thickness is 0.35mm. The simulation results of the shape system show that for this type of steel coil, such as image 3 As shown, before and after using the method of the present invention, the 6I-UNIT hit rates of strip shape deviation at the exit of the rolling mill are 96% and 99% respectively, indi...

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Abstract

The invention relates to a feedforward control method for a cold rolled strip shape. The control method comprises the steps of configuring a strip shape meter only at an inlet of a cold rolling mill or configuring strip shape meters both at the inlet and an outlet of the cold rolling mill to detect the shape of a strip at the inlet of the cold rolling mill in real time in order to achieve the control aims that the rolling process is stable and the shape of a strip at the outlet is favorable; regulating a strip shape regulating mechanism of the rolling mill according to the change feedforward of the shape of the strip at the inlet of the rolling mill; and eliminating the adverse effects of the shape of the strip at the inlet of the rolling mill on the stability of the rolling process and the shape of the strip at the outlet of the rolling mill in time. Compared with the prior art, the feedforward control method not only can be used for improving the stability of the cold rolling process and improving the capacity of a unit, but also can be used for ensuring the control precision of the strip shape and improving the product quality.

Description

technical field [0001] The invention relates to the technical field of strip rolling, in particular to a feedforward control method for cold-rolled strip shape. Background technique [0002] Cold-rolled strip steel has beautiful surface and good processing performance. It is an indispensable raw material for industries such as automobiles, construction, home appliances, and food. Its production is difficult and requires high precision. High added value. Cold-rolled strips usually use hot-rolled products as raw materials, which are formed by reciprocating rolling of one rolling mill or continuous rolling of multiple stands. During the cold-rolling process of strips, the strip shape quality at the entrance of the rolling mill directly affects the rolling stability. Moreover, it also has a certain influence on the strip shape at the exit of the rolling mill. In the existing reversing cold rolling mills, most of the flatness gauges are installed at the entrance and exit of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/28B21B37/72B21B38/00
Inventor 顾廷权何汝迎徐锋乔爱民袁意林
Owner NINGBO BAOXIN STAINLESS STEEL
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