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A control method of leveling elongation during the start-up and stop of the skin-pass mill

A technology of leveling elongation rate and control method, which is applied in the field of leveling elongation rate control, and can solve problems such as fluctuations in elongation rate of continuous tempering machine

Active Publication Date: 2019-07-02
SHOUGANG CORPORATION
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention provides a method for controlling the leveling elongation rate in the process of starting and stopping the tempering machine, so as to solve the technical problem that there is a large fluctuation in the elongation rate when the continuous retreating leveling machine is stopped and started.

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  • A control method of leveling elongation during the start-up and stop of the skin-pass mill
  • A control method of leveling elongation during the start-up and stop of the skin-pass mill
  • A control method of leveling elongation during the start-up and stop of the skin-pass mill

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Embodiment Construction

[0027] 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.

[0028] The main problem of this phenomenon is that the setting value of the secondary rolling force is too large after the machine is stopped and started, resulting in a large deviation between the actual flat elongation and the set elongation, which will seriously affect the performance of the strip here. . In order to improve the control precision of leveling elongation rate in the process of start-up, this technical scheme is proposed.

[0029] This method provides a control method for the elongation rate of the temper mill in the process of starting and stopping the temper mill. In order to improve the control accuracy of the temper elongation rate of the temper mill, by optimizing t...

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Abstract

The invention discloses a control method of temper rolling elongation during a staring up and closing down process of a temper mill. During the staring up and closing down process of the temper mill, a setting roll force is utilized for rolling strip steel, so that the temper rolling elongation after closing down and then starting up can be within a control requirement.

Description

technical field [0001] The present application relates to the technical field of steel rolling, and in particular to a method for controlling the elongation rate of a tempering mill during start-up and shutdown. Background technique [0002] After recrystallization annealing, the cold-rolled strip steel eliminates the work hardening structure, but the mechanical properties and processing properties deteriorate. At this time, the stress-strain curve of the strip steel has an obvious upper yield limit, and a yield plateau appears at the lower yield limit. The methods to eliminate the yield plateau include temper rolling, tensile deformation and straightening, etc. Mass production practice has proved that temper rolling is the most effective processing method and is widely used in large-scale production. [0003] Different from conventional cold rolling, tempering is essentially a small deformation (0.5% to 5%) rolling, which is an important production process in the cold rolli...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/28B21B37/58
CPCB21B37/28B21B37/58
Inventor 王永强李宫胤于孟文杰刘顺明王凤琴李靖王慧李振张益涛昝现亮王硕李金龙
Owner SHOUGANG CORPORATION