Kabushiki Kaisha Toshiba

Toshiba Mitsubishi-electric Industrial Systems Corporation

Masashi Tsugeno

Mitsuhiko Sano

Makoto Miyashita

Hiroyuki Imanari

Tomoyuki Tezuka

Naoki Yamaguchi

Kazuhiro Ohara

Masaki Hioka

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.

Thickness control apparatus of reversing rolling mill

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.

Apparatus for controlling materials quality in rolling, forging, or leveling process

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.

Learning control apparatus for a reversing rolling mill

A tandem rolling mill (FM) has mill stands (Fi; i&equals;1 to 7) to be controlled in conformity with given rolling conditions (j) to execute a given path schedule for a coil (,) to be rolled by rolls (WR) of the mill stands (Fi) to scheduled thicknesses (h,) at exit sides of the mill stands (Fi), with scheduled peripheral speeds (V,) of the rolls (WR). The mill stands (Fi) are checked for non-conformity with any rolling condition (j), correction amounts (&Dgr;&ggr;,) are calculated of normalized values (&ggr;,) of rolling forces (P,) of non-conforming mill stands (Fi*), as necessary to meet any rolling condition (j*), the normalized values (&ggr;,) are corrected by a maximal one of the correction amounts (&Dgr;&ggr;,) to provide corrected values as targets (&ggr;,) to be achieved at the non-conforming stands (Fi*), and the given path schedule is re-scheduled to achieve the targets (&ggr;,) by determining re-scheduled thicknesses (h,) of the coil (,) and re-scheduled peripheral speeds (V,) of the rolls (WR), both independently defining a mass flow of the coil (,) to be constant at the respective mill stands (Fi).

Path scheduling method and system for rolling mills

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.

Strip threading speed controlling apparatus for tandem rolling mill

Rolling control method and apparatus

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.

Growing community of inventors

Tokyo, Japan

Masashi Tsugeno