Abstract: A thickness control apparatus of a reversing rolling mill has an entry thickness gauge that measures the thickness of the material to be rolled, and entry material speed detector that detects the speed of the material to be rolled. Measured thickness measured by the entry thickness gauge is tracked on the basis of the speed of the material to be rolled detected by the entry material speed detector. A mill delivery thickness calculator calculates thickness on the delivery side of the reversing rolling mill on the basis of the thickness on the entry side and the roll gap detected.

Abstract: A thickness control apparatus of a reversing rolling mill has an entry thickness gauge that measures the thickness of the material to be rolled, and entry material speed detector that is detects the speed of the material to be rolled. Measured thickness measured by the entry thickness gauge is tracked on the basis of the speed of the material to be rolled detected by the entry material speed detector. A mill delivery thickness calculator calculates thickness on the delivery side of the reversing rolling mill on the basis of the thickness on the entry side and the roll gap detected.

Abstract: This invention matches the material quality of a product to target data, even when a materials quality model is insufficient in prediction accuracy. Heating a metallic material, rolling, forging, or leveling the metallic material, and cooling the metallic material are each conducted at least once. Prior to manufacture of a metallic product of a desired size and shape, qualitative data of the metallic material are measured at a position by a materials quality sensor in a manufacturing line, and modifications based on measured data are made to heating, processing, or cooling conditions in at least one of the steps, upstream of the materials measured data sensor so that the quality of the metallic material at the measuring position agrees with target data.

Abstract: The invention matches the material quality of a product to target data, even when a materials quality model is insufficient in prediction accuracy. Heating a metallic material, rolling, forging, or leveling the metallic material, and cooling the metallic material are each conducted at least once. Prior to manufacture of a metallic product of a desired size and shape, qualitative data of the metallic material are measured at a position by materials, quality sensor in a manufacturing line, and modifications based on measured data are made to heating, processing, or cooling conditions in at least one of the steps, upstream of the materials measured data sensor so that the quality of the metallic material at the measuring position agrees with target data.

Abstract: The invention matches the material quality of a product to target data, even when a materials quality model is insufficient in prediction accuracy. Heating a metallic material, rolling, forging, or leveling the metallic material, and cooling the metallic material are each conducted at least once. Prior to manufacture of a metallic product of a desired size and shape, qualitative data of the metallic material are measured at a position by materials, quality sensor in a manufacturing line, and modifications based on measured data are made to heating, processing, or cooling conditions in at least one of the steps, upstream of the materials measured data sensor so that the quality of the metallic material at the measuring position agrees with target data.

Abstract: A learning control apparatus in a reversing rolling mill is disclosed. The learning control apparatus adds a learning calculation means that performs learning calculations based on actual values in the previous pass so as to be able to cope with the pass schedule composition peculiar to the reversing rolling mills. Furthermore, by storing learning calculation values of model errors that depend on materials and product dimensions in tables prepared group division by group division that can assimilate intrinsic model errors, the learning control apparatus of the present invention makes possible stable operation and improves accuracy of the product.

Abstract: A tandem rolling mill (FM) has mill stands (Fi; i=1 to 7) to be controlled in conformity with given rolling conditions (j) to execute a given path schedule for a coil (1) to be rolled by rolls (WR) of the mill stands (Fi) to scheduled thicknesses (hi) at exit sides of the mill stands (Fi), with scheduled peripheral speeds (Vi) of the rolls (WR).

Abstract: A strip threading speed controlling apparatus for a tandem rolling mill is constructed to calculate a speed set value of two adjacent rolling stands by using a forward slip predicted considering a back tension without considering a front tension in an upstream-side rolling stand thereof, and a forward slip predicted without considering the tension in a downstream-side rolling stand, and to calculate the speed set value of each rolling stand by shifting the rolling stands stage by stage.

Abstract: In order to reflect a difference between an actual value and a target value of a strip profile of a product at a tandem mill, the load pattern for the next rolled material is changed in accordance with the difference of a target value and an actual value of the crown ratio of the previously rolled material. In this case, there are calculated the coefficients of the crown ratio/load, and load/load ratio. The crown ratio difference is sequentially given to the previous stand in accordance with the load ratio to determine the change amount of the load ratio at each stand. The load pattern for the next rolled material is given while considering the change amount, to calculate the delivery thickness at each stand carrying out the rolling operation.

Abstract: In setting roll gaps of a rolling mill having stands arranged in tandem, the resistance to deformation of a workpiece in each of the stands is calculated on the basis of a cumulative strain in each stand, with strain of the workpiece which is in an entrance side of the mill and in a soaked state being zero. The resistance to deformation of the soaked workpiece is obtained in each stand, so that the accuracy of estimation of the resistance to deformation is improved. Thus, a precise roll gap setting becomes possible, resulting in a product of a thickness accurately coincident with an objective thickness.