A Calculation Method of Core Temperature of Hot Continuous Rolling Intermediate Billet

Abstract

The invention provides a method for calculating the core temperature of an intermediate billet in hot continuous rolling, and relates to the technical field of automatic control of steel rolling. This method calculates the average temperature of the rolled piece based on the rolling force speed, width and thickness actually measured at the end of the rolling pass in the rough rolling zone, and calculates the temperature drop loss of the rolled piece on the transport roller table by calculating the air cooling temperature drop, and obtains the rolled piece The average temperature of the rolled piece is further combined with the surface temperature of the rolled piece at any position on the middle roller table, and the core temperature of the rolled piece can be calculated. The method of the present invention is safe, has high calculation accuracy, can be successfully applied to the calculation process of the intermediate billet core temperature of a hot continuous rolling mill, solves the problem that the intermediate billet core temperature cannot be directly measured online in the actual process, and saves production investment costs. At the same time, it ensures the calculation accuracy of temperature and provides a good foundation for online precise control of finished product thickness.

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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