Hot rolling and rough rolling load distribution method considering convexity of intermediate billet

A technology of load distribution and rough rolling, applied in the field of control, can solve problems such as unreasonable distribution of finish rolling crown, failure to consider the optimization conditions of intermediate billet crown, and insufficient calculation speed and accuracy

Active Publication Date: 2020-10-27
UNIV OF SCI & TECH BEIJING
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  • Abstract
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Problems solved by technology

However, the above method has shortcomings. First, it is used in the single-stand roughing rolling mill, and there is no load distribution for the double-stand roughing mill. Second, it uses the equal compound distribution method and the alternate iterative calculation method, and the calculation speed and accuracy are not as good as The allocation method of "offline optimization + online control" is not considering the crown of the intermediate billet as the optimization condition. The unreasonable crown of the intermediate billet will lead to the unreasonable allocation of the crown of the finishing rolling, which will bury the hidden danger of the plate shape.

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  • Hot rolling and rough rolling load distribution method considering convexity of intermediate billet
  • Hot rolling and rough rolling load distribution method considering convexity of intermediate billet
  • Hot rolling and rough rolling load distribution method considering convexity of intermediate billet

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Embodiment Construction

[0056] The following is a further description of the invention patent in combination with specific implementation cases. This implementation case is a hot continuous rolling rough rolling double-stand production line, and the layout is as follows image 3 As shown, the rough rolling R1 equipment parameters are shown in Table 1, and the rough rolling R2 equipment parameters are shown in Table 2.

[0057] Table 1 Rough rolling R1 equipment parameters

[0058]

[0059] Table 2-2 Rough rolling R2 equipment parameters

[0060]

[0061]

[0062] A kind of hot rolling rough rolling load distribution method considering the crown of the intermediate billet, specifically comprising the following steps:

[0063] Step 1: The established rolling process characteristic parameter calculation model, including (1), (2) and (3):

[0064] (1) Rolling force model:

[0065] P=Bl c Q p KK T

[0066] Among them, P is the rolling force, KN; l c In order to consider the horizontal pro...

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Abstract

The invention discloses a hot rolling and rough rolling load distribution method considering convexity of an intermediate billet, and belongs to the technical field of control. According to the method, a mathematical model of a hot continuous rolling rough rolling process is established, a target optimization function is determined on the premise of considering the convexity of an intermediate billet, and under the optimal setting constraint condition, rough rolling load distribution is optimally designed by using a three-population differential evolution particle swarm algorithm. According tothe method, distribution method combining offline optimization and online control and a three-population difference algorithm are adopted, the calculation speed is high, the online calculation requirement is met, and load distribution optimization setting and intermediate billet convexity prediction can be achieved.

Description

technical field [0001] The invention belongs to the technical field of control, and relates to a hot rolling rough rolling load distribution method considering the crown of an intermediate billet. Background technique [0002] As the ability to control the thickness of hot rolling is getting higher and higher, the products produced by hot rolling can be delivered to customers as the final product, so the shape of the plate is becoming more and more important. Load distribution is the core control technology of hot continuous rolling. Reasonable load distribution can make more reasonable use of rolling mill equipment under the same rolling conditions and improve the control ability of strip shape. In order to achieve the optimal result of load distribution, optimization algorithms such as differential algorithm are mostly used to solve the problem, mainly based on the parameter model to establish multi-objective optimization, establish the optimization objective function unde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F111/04G06F111/06
CPCG06F30/20G06F2111/06G06F2111/04
Inventor 徐冬何海楠翟德家王晓晨杨荃刘洋王程允孙友昭
Owner UNIV OF SCI & TECH BEIJING
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