A controlling method for hot rolled strip threading of a continuous mill set

A technology of hot-rolled strip steel and control method, which is applied in the direction of rolling mill control device, metal rolling, temperature control, etc., and can solve problems not related to strip threading efficiency and stability, limited strip threading control, and strip threading control. Low temperature and other problems, to achieve the effect of improving the stability of strip threading, improving the efficiency of the rolling mill, and improving the efficiency of the rolling mill

Active Publication Date: 2015-04-01
BAOSHAN IRON & STEEL CO LTD
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Problems solved by technology

[0007] The patent publication number is CN101081406, and the title of the invention is "a method for ensuring uniform temperature of hot-rolled finish-rolled strip steel throughout the length" patent document. The low temperature at the head and tail of the steel leads to difficult rolling and technical problems of unqualified products
[0008] The above three patented technologies mainly involve the stability of strip threading, but because they do not involve the efficiency and stability of the strip threading process; therefore, the control of strip threading is limited

Method used

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  • A controlling method for hot rolled strip threading of a continuous mill set
  • A controlling method for hot rolled strip threading of a continuous mill set

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Embodiment Construction

[0043] In order to ensure the requirements of different types and specifications of strip steel (mainly applied to strip steel with a thickness of 1.2-25mm) in terms of strip threading stability, this technical solution can maximize the rolling mill threading stability while satisfying the strip threading stability. On the basis of the strip speed, while adopting the speed iterative deformation temperature control technology, the secondary layer judgment is adopted for strip steel of different specifications, taking into account the stability of strip threading and the efficiency of the rolling mill.

[0044] Refer to attached figure 1 , the specific technical solutions involved are as follows:

[0045] Step 1. Obtain the basic parameters given by the rolling strategy:

[0046] Combined with the data necessary for calculating the speed of the strip before the frame threading: strip threading speed, acceleration, water spray on the frame, water spray for division by zero, raw ...

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Abstract

The invention discloses a controlling method for hot rolled strip threading of a continuous mill set. The controlling method comprises the steps of acquiring the basic parameters given by rolling strategy, calculating core passes, and continuously adjusting the strip-threading speed or the water yield according to the calculating result. A set value of precision rolling is determined according to the consistency between the adjusted precision rolling temperature and the target precision rolling temperature and the obtained data, or alarm is given when the condition is unavailable. The method is mainly characterized by controlling the strip-threading speed of the related continuous mill by determining a quadratic layer, raising the controlling accuracy in the strip-threading speed of related strip steel by controlling the strip-threading speed of related strip steel and employing the temperature control technique based on speed iteration deformation.

Description

technical field [0001] The invention relates to a strip threading control method for a hot-rolled strip continuous rolling mill, belonging to the field of hot-rolled strip production control. Background technique [0002] With the continuous provision of hot rolling technology, new requirements are put forward for the varieties and specifications of strip steel. The scope of application of a set of hot rolling mills is directly related to the economic benefits of hot rolling production lines. In order to adapt to the stability of the continuous rolling mill, higher requirements are put forward for the stability of the strip threading involved. Not only is it required to be stable in strip threading, but also it is required to have considerable efficiency. From the configuration of the equipment, the continuous rolling mill is arranged between stands There are cooling water pipes (with flow control) installed on the outlet side of the frame, and side sprays are installed on t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/00B21B37/74
Inventor 荣鸿伟叶红卫唐世欣许春飞顾豪杰高志玲
Owner BAOSHAN IRON & STEEL CO LTD
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