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Method for controlling acid-washing and edge-shearing quality of high-strength steel

A technology of high-strength steel and steel acid, which is applied in the general control system, adaptive control, control/regulation system, etc., can solve the problem of inability to accurately control the set value of disc shear gap and overlap, and is not suitable for edge trimming of high-strength steel products Control and other issues, to achieve the effect of reducing the chipping rate, reducing the number of broken belts, and improving accuracy

Active Publication Date: 2012-10-10
BAOSHAN IRON & STEEL CO LTD
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Problems solved by technology

[0010] However, the method provided by this invention mainly involves the trimming control scheme of ultra-low carbon mild steel, and is not suitable for trimming control of high-strength steel products
At the same time, when the above method sets the trimming parameters, it is only based on the linear mathematical model of the thickness of the hot-rolled incoming material, and cannot achieve the purpose of precise control of the set values ​​​​of the disc shear gap and overlapping amount.

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  • Method for controlling acid-washing and edge-shearing quality of high-strength steel

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Embodiment Construction

[0020] A specific embodiment of a method for controlling the quality of pickling trimming of high-strength steel provided by the present invention is given below.

[0021] The method comprises the steps of: adopting the process computer system to respectively cut the disc shear gap H 1 and the amount of overlap H 2 The set value is calculated, and then the obtained set value is transmitted to the operating computer system, and the operating computer system adjusts the disc shears transmission device according to the obtained set value, and controls the disc shears to operate on the high-strength steel Carry out trimming, it is characterized in that:

[0022] The disc shear gap H 1 and the amount of overlap H 2 The set value of is obtained by the following formula:

[0023] h 1 =α 1 X+β 1 Y+γ 1 Z+δ 1 Q

[0024] h 2 =α 2 X+β 2 Y+γ 2 Z+δ 2 Q

[0025] In the above formula, X is the thickness of the incoming material, Y is the yield strength of the high-strength ste...

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Abstract

The invention relates to a method for controlling the acid-washing and edge-shearing quality of high-strength steel. The method comprises the following steps of: respectively calculating setting values of a disc shear gap H1 and an overlapping amount H2 by adopting a process computer system, sending obtained setting values to an operation computer system, regulating a disc shear driving device by the operation computer system according to the obtained setting values, and controlling a disc shear to carry out the edge shearing on the high-strength steel. According to the method disclosed by the invention, the edge shearing quality of a high-strength steel product with the shear strength being in a range of 380 N / mm<2> to 600 N / mm<2> can be increased, abnormal situations of shear breaking and the like can be reduced, and the actual production demands of the high-strength steel product in a cold continuous rolling unit can be met.

Description

technical field [0001] The present invention relates to a strip steel shearing technology, in particular to a method for controlling the quality of high-strength steel pickling trimming, suitable for yield strength of 380N / mm 2 ~600N / mm 2 between high-strength steels. Background technique [0002] In recent years, in order to significantly reduce material costs and manufacturing costs during use, modern high-strength steel has been widely used in the fields of construction, ships and marine structures, and the market demand for high-strength steel products is also increasing. But in the actual production process, high-strength steel products, especially the yield strength of 380N / mm 2 The above high-strength steel products, due to their material characteristics, are prone to poor shearing and disc shearing during the trimming process of hot-rolled plates after pickling. It is easy to cause broken belt accidents during the manufacturing process, which is not conducive to s...

Claims

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Application Information

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IPC IPC(8): G05B13/04
Inventor 曾建峰张明章培莉宋俊
Owner BAOSHAN IRON & STEEL CO LTD
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