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Edge-drop control method during rolling process

A control method and rolling process technology, applied in the field of strip steel cold rolling, can solve the problems of not fully utilizing the ability of edge drop control of production line equipment, and achieve the effect of improving quality and widely promoting application value

Active Publication Date: 2016-03-30
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The methods listed above mainly involve the control principle of the edge drop of the strip steel. The main function of this method is to reduce the edge drop value by using the roll movement method. It does not involve the use of bending rolls, and the edge drop control of the production line equipment is not fully utilized. Ability

Method used

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Experimental program
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Effect test

Embodiment 1

[0053] For the 5-stand cold tandem cold rolling mill of electrical steel, the same-slab difference is controlled through the feedback program of the stands. The upper limit of the work roll movement of the first stand is 105mm. When producing A series strip steel, the first stand is set to The rolling force is 1000 tons. In order to improve the corresponding control effect of the rolling mill in the same plate difference control process, a method of edge drop control in the rolling process is put in as follows:

[0054] (1) A-series strip steel is a product with high difficulty in rolling. Considering the factors of production stability, the implementation time point of the corresponding work roll bending automatic control method is from the time when the welding seam passes through the first stand to the time when the next weld seam enters the second stand. 15m in front of one rack;

[0055] (2) The roll shifting control and roll bending control in the method of the present i...

Embodiment 2

[0060] For the 5-stand cold tandem cold rolling mill of electrical steel, the same-slab difference is controlled through the feedback program of the stands. The upper limit of the work roll movement of the first stand is 105mm. When producing B series strip steel, the first stand is set to The rolling force is 1000 tons. In order to improve the corresponding control effect of the rolling mill in the same plate difference control process, a method of edge drop control in the rolling process is put in as follows:

[0061] (1) B-series strip steel is a product with low rolling difficulty. Considering the factors of production stability, the implementation time point of the corresponding work roll bending automatic control method is from the time when the welding seam passes through the first stand to the time when the next weld seam enters the second stand. 5m in front of one rack;

[0062] (2) The roll shifting control and roll bending control in the method of the present invent...

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Abstract

The invention relates to the field of strip steel cold rolling, in particular to an edge-drop control method during a rolling process.The control method is used for controlling the edge-drop index by combination of bend roller control and channeling roll control and comprises following steps: firstly, setting control parameters including the upper limit of channeling amount and the optimized threshold of channeling amount for channeling roll control, and the upper limit of roller-bending force and the optimized threshold of roller-bending force for bend roller control; and controlling to prioritize increase of the channeling amount when the edge drop is not up to the standard and prioritize decrease of roller-bending amount when the edge drop is up to the standard based on channeling amount and roller-bending amount.The edge-drop control method during the rolling process has following beneficial effects: by a system analysis of the control process of the edge drop, a roller-bending control mode of a working roller matching channeling of the working roller during the rolling process is realized such that the capability of a working roller-bending means for controlling edge drop is fulfilled; the approach to prioritizing roll channeling control for controlling edge drop is adopted and a roller-bending means plays an auxiliary role; and therefore quality of strip shapes is improved.

Description

technical field [0001] The invention relates to the field of steel strip cold rolling, in particular to an edge drop control method. Background technique [0002] Edge drop of electrical steel plate, referred to as edge drop, also known as edge thinning, is an important parameter of electrical steel plate size. Because electrical steel sheets need to be punched and stacked for use, if the edge drop of the steel sheets is too large, the punched silicon steel sheets will be regularly thicker and thinner, and the stator and rotor after lamination will have a large dimensional deviation, which will affect the The winding of the coil and the efficiency of the motor. Therefore, the edge drop is an important size index of the electrical steel plate, and users have strict requirements on the edge drop index of the electrical steel plate. [0003] Most of the existing edge drops are defined by edge drop precision, such as figure 1 The edge drop accuracy shown is the difference bet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/16
Inventor 曾建峰李红梅周毅刘宝军朱简如李山青金国宋艳丽姜龙兴
Owner BAOSHAN IRON & STEEL CO LTD