A control method for preventing strip breakage in thin strip steel cold rolling process

A control method and technology for thin strip steel, applied in rolling mill control device, metal rolling, metal rolling and other directions, can solve the problems of low detection accuracy, high cost of detection equipment, affecting the control accuracy of strip thickness, etc., to achieve improved control Accuracy, improved stability and yield, high accuracy

Active Publication Date: 2017-05-31
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the real-time detection of the edge crack length of the rolled strip also has the problems of high cost of detection equipment and low detection accuracy. At the same time, adjusting the tension of the strip will easily affect the control accuracy of the thickness of the strip.

Method used

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  • A control method for preventing strip breakage in thin strip steel cold rolling process
  • A control method for preventing strip breakage in thin strip steel cold rolling process
  • A control method for preventing strip breakage in thin strip steel cold rolling process

Examples

Experimental program
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Effect test

Embodiment 1

[0050] An embodiment of the control method for preventing strip breakage in the thin strip steel cold rolling process of the present invention is as follows figure 1 As shown, this embodiment is used in the rolling process control system of the five-stand cold rolling mill. In this embodiment, at the entrance and exit of the cold-rolling unit composed of 5-stand rolling mills, an entrance strip width detector 30 and an exit strip width detector 31 are respectively configured to detect in real time the entrance and exit of the cold-rolling unit along the strip width. The measured value of the width at each position in the length direction of 10. The control process includes the following steps:

[0051] (a) According to the steel type, thickness, width and rolling process parameters of the strip, determine the given value R of the width reduction rate after rolling by all stands of the cold rolling mill w_set ;Width reduction rate given value R w_set It can be obtained throu...

Embodiment 2

[0067] Another embodiment of the control method for preventing strip breakage in the thin strip steel cold rolling process of the present invention is as follows figure 2 As shown, this embodiment is used in the rolling process control system of the five-stand cold rolling mill. In the present embodiment, at the entrance and exit of the cold-rolling unit composed of 5-stand rolling mills, an entrance strip width detector 30 and an exit strip width detector 31 are configured respectively. Between 5, strip steel width detectors 301-304 are respectively configured to detect in real time the measured width values ​​at various positions along the length direction of the strip steel 10 between the entrance, exit and between the stands of the cold rolling mill. The control process includes the following steps:

[0068] (a) According to the steel type, thickness, width and rolling process parameters of the strip, through rolling experiments or theoretical model simulation calculatio...

Embodiment 3

[0084] image 3 It is another embodiment of the control method for preventing strip breakage in the thin strip steel cold rolling process of the present invention, and it is used in a rolling process control system of a cold rolling unit composed of a single stand. In the present embodiment, at the entrance and exit of the cold-rolling unit consisting of single-stand rolling mills, an entrance strip width detector 30 and an exit strip width detector 31 are respectively configured to detect in real time the entrance and exit of the cold-rolling unit along the strip 10 The measured value of the width at each position in the length direction of . This embodiment is actually n=1 and β in the above-mentioned multi-stand cold rolling mill i = 1, the control process includes the following steps:

[0085] (a) According to the steel type, thickness, width and rolling process parameters of the strip, determine the given value R of the width reduction rate after being rolled by a singl...

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PUM

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Abstract

The invention relates to a device and method which are specially suitable for metal rolling mills or processed products of the metal rolling mills, and especially relates to a control method for preventing strip breaking during a thin steel strip cold rolling process and especially a thin steel strip cold continuous rolling process, and is used for a rolling process control system of multi-stand old continuous rolling machine sets and single-stand cold rolling machine sets. By means of steel strip width detectors arranged on an inlet and an outlet of a machine set, the width of the steel strip in front of the machine set and the width of the steel strip on the back of the machine set are detected in real time, and the reduction rate of the steel strip width is determined; and according to the deviation of the reduction rate of the steel strip width, the compensation quantity of a plate-shaped adjusting mechanism is determined. According to the invention, through an existing computer rolling process control system of the cold rolling machine set, the compensation of the plate-shaped adjusting mechanism is achieved, the detection technology is mature, the accuracy is high, the equipment investment cost is low, strip breaking during the thin steel strip cold rolling process can be prevented, the stability of the cold rolling production process can be improved, and the rolling yield of the cold rolling production process can be risen, the production cost is reduced, at the same time, the control precision of the cold rolling steel strip width can be improved to some extent.

Description

technical field [0001] The invention relates to a control device or method specially suitable for a metal rolling mill or its processed products, in particular to a control method for preventing strip breakage in the cold rolling process of thin strip steel, especially in the continuous cold rolling process. Background technique [0002] In the practice of cold-rolled thin strip production, due to the edge defects of the incoming strip, or the edge of the strip, or the excessive tensile stress of the strip edge, etc., the phenomenon of strip interruption during the cold rolling process of the thin strip occurs from time to time. In the slightest, it will cause interruption of the cold rolling production process and scrap steel coils, and in severe cases, the rolls will be scrapped or even the equipment will be damaged, which will seriously affect the production capacity and product quality of the thin strip cold rolling mill. The unreasonable selection of rolling process par...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/00
CPCB21B37/00B21B38/04
Inventor 顾廷权樊志强刘云峰何小丽
Owner BAOSHAN IRON & STEEL CO LTD
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