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Edge Drop Control Method in Rolling Process

A control method and rolling process technology, applied in the field of cold strip steel rolling, can solve problems such as underutilization of the edge drop control capability of production line equipment, and achieve the effect of improving quality and widely popularizing application value.

Active Publication Date: 2017-06-23
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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  • Edge Drop Control Method in Rolling Process
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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 a rack;

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

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Abstract

The invention relates to the field of steel strip cold rolling, in particular to an edge drop control method. A method for controlling edge drop in a rolling process. The edge drop index is controlled by combining roll bending control and roll shifting control. First, control parameters are set. Bending force upper limit and bending force optimization threshold in roll bending control; then control is performed according to the amount of roll shifting and roll bending. When the edge drop fails to meet the standard, the amount of roll shifting is given priority, and when the edge drop reaches the standard, the amount of roll bending is preferentially reduced. Through the systematic analysis of the edge drop control process, the present invention realizes the work roll bending control mode that matches the work roll movement in the rolling process, so as to give full play to the ability of the work roll bend to control the edge drop. The strategy of preferential roll shifting control is adopted during edge drop, supplemented by roll bending control, which improves the quality of the plate shape.

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] The Edge Drop of the electrical steel plate, referred to as the edge drop, also known as the edge thinning, is an important parameter of the size of the electrical steel plate. 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(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