Method for calculating temperature of core of hot continuous rolling intermediate billet

Abstract

The invention provides a method for calculating the temperature of a core of a hot continuous rolling intermediate billet, and relates to the technical field of automatic steel rolling control. The method comprises the steps that rolled piece average temperature is calculated according to rolling force speed, width and thickness obtained through actual measurement of a rough rolling area tail rolling pass; the temperature drop losses of a rolled piece on a transportation roller bed is calculated through air cooling temperature drop, the average temperature of the rolled piece is obtained, andin combination with the surface temperature of the rolled piece at any position of the middle roller bed, the core temperature of the rolled piece can be calculated. The method is safe and reliable, the calculation precision is high, the method can be successfully applied to the calculation process of the temperature of the core of the hot continuous rolling intermediate billet, the problem that the temperature of the core of the intermediate billet cannot be only measured in the actual process is solved, and the production investment cost is reduced; and meanwhile the calculation precision ofthe temperature is guaranteed, and a good basis is provided for online precise control of the thickness of the finished product.

Description

technical field [0001] The invention relates to the technical field of steel rolling automatic control, in particular to a method for calculating the core temperature of a hot continuous rolling intermediate slab. Background technique [0002] In the process of hot continuous rolling, the core temperature of the intermediate billet is the basis for accurate calculation of the rolling force in the finishing rolling area. The thermometer installed on the rolling line can only measure the surface temperature of the rolled piece, but cannot measure the core temperature of the rolled piece; since the rolled piece runs at a certain speed on the intermediate roller table, it is also impossible to measure the real-time heart temperature by embedding a thermocouple. internal temperature measurement. [0003] During the heating process of the slab in the heating furnace, it is heated to the target discharge temperature according to a certain temperature rise curve, and the slabs load...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for calculating the temperature of the core of the hot continuous rolling billet in view of the shortcomings of the above-mentioned prior art, which has high safety and high calculation accuracy, and can be successfully applied to the temperature of the core of the hot continuous rolling mill. The calculation process solves the problem that the core temperature of the intermediate billet cannot be directly measured online in the actual process. While saving production investment costs, it ensures the calculation accuracy of the temperature and provides a good foundation for the online precise control of the thickness of the finished product.

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