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Control method and system for roll-bending force of skin-pass mill

A control method and technology of roll bending force, which is applied in the field of control method and control system of roll bending force of skin pass mill, can solve inaccurate, hot-dip coated strip head or tail wave shape, untimely bending force, etc. problems, to achieve the effect of reducing the probability of failure, reducing strip edge waves, and improving control accuracy

Active Publication Date: 2020-06-09
SHOUGANG JINGTANG IRON & STEEL CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] The invention provides a method for controlling the bending force of a skin pass machine to solve or partly solve the problem that the manual adjustment of the bending force is not timely and accurate, and it is easy to cause surface quality such as waves at the head or tail of the hot-dip galvanized strip steel technical issues

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  • Control method and system for roll-bending force of skin-pass mill
  • Control method and system for roll-bending force of skin-pass mill
  • Control method and system for roll-bending force of skin-pass mill

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Embodiment Construction

[0048] In order to enable those skilled in the technical field to which the application belongs to understand the application more clearly, the technical solutions of the application will be described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0049] In simple terms, the bending control process of the skin pass machine is to control the bending cylinder in the hydraulic block to act on the work roll bearing seat of the skin pass machine to change the bending state of the work roll, thereby adjusting the crown of the work roll. When the positive roll bending force generated by the bending oil cylinder at the roll neck of the work roll is greater than the negative roll bending force, the work roll will produce positive roll bending, making the middle part of the work roll more convex relative to the galvanized sheet, and the center of the galvanized sheet The pressure of the position increases; when the negative bending force is ...

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Abstract

The invention discloses a control method for roll-bending force of a skin-pass mill. The control method for the roll-bending force of the skin-pass mill is applied to the stage, passing through the skin-pass mill, of a welding line area of strip steel. The control method comprises the steps that an operating parameter of the welding line area passing through the skin-pass mill is obtained, and theoperating parameter comprises a strip steel width, a rolling force set value, a rolling force actual value and a first roll-bending force set value; according to the strip steel width, a corresponding compensation factor is confirmed from a mapping relationship of ''the strip steel width-the compensation factor''; a roll-bending force compensation value is calculated in real time according to therolling force actual value, the rolling force set value, the compensation factor and the first roll-bending force set value; the first roll-bending force set value is compensated according to the roll-bending force compensation value to obtain a target roll-bending force set value; and working rolls of the skin-pass mill are controlled according to the target roll-bending force set value. According to the control method for the roll-bending force of the skin-pass mill, automatic roll-bending force compensation is realized when a welding line passes through the skin-pass mill, and the controlaccuracy of the roll-bending force is improved.

Description

technical field [0001] The present application relates to the technical field of strip steel hot-dip coating, and in particular to a method and a control system for controlling the bending force of a skin pass machine. Background technique [0002] The skin pass machine is one of the most important equipment on the hot-dip galvanizing production line. Its function is to improve the surface quality of the hot-dip galvanized strip steel and change the surface finish. It can eliminate certain stress and yield platform, and to a certain extent Improve the board shape. Bending force is one of the most important process parameters of skin pass mill, which plays a decisive role in eliminating shape defects of strip steel plate and improving the quality of plate surface. The current four-roller skin pass machine in the production line does not have the function of automatically adjusting the bending force when the strip is changed in specification. Every time the weld passes throug...

Claims

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Application Information

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IPC IPC(8): B21B37/72B21B1/22
CPCB21B37/72B21B1/22B21B2001/228
Inventor 王艳强吕剑杨振兴田才张益滔宗志军马红利李大哲
Owner SHOUGANG JINGTANG IRON & STEEL CO LTD
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