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

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...

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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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