Patent attributes
A temperature control device for a hot rolling mill, preventing a sudden change in temperature of a rolled material near the delivery side of the rolling mill and realizing precise gauge control. The hot rolling mill has rolling stands arranged in a row and cooling devices for cooling the rolled material. The hot rolling mill is operated so that the cooling devices are preferentially used, in order, from one closest to the entry side until the upper limit pressure is reached. The cooling water pressure of each of the cooling devices is computed based on the target temperature of the rolled material and the actual temperature on the entry side. The cooling water pressure of the cooling device closest to the delivery side of the rolling mill is computed based on the target temperature of the rolled material and the actual temperature on the delivery side so the difference between the target temperature and the actual temperature on the delivery side is minimized.
