Kabushiki Kaisha Toshiba

Toshiba Mitsubishi-electric Industrial Systems Corporation

Kawasaki Steel Corporation

Tomoyuki Tezuka

Yoshiharu Anbe

Noriyasu Okitani

Takumi Sato

Kunio Sekiguchi

Masashi Tsugeno

Nobuaki Nomura

Haruki Inami

Yoshimitsu Fukui

Yoshito Goto

Mamoru Sawada

Wataru Kameyama

Youji Abiko

Mutsumi Suganuma

Tomohiro Kanai

Taichi Hatashita

In thickness control processing, transfer processing of an entry thickness He(N) is performed (step S). In the transfer processing, data of the entry thickness He(N) is transferred from a position Pto a position Pat the same speed as the speed of a material to be rolled M. Subsequently, an amount of change in a thickness ΔH(N) is calculated (step S). The amount of the change in the thickness ΔH(N) is calculated based on data of a delivery thickness Hd(N) and data of a transferred thickness Hc(N) transferred to the position Pat a timing when the data of the delivery thickness Hd(N) is measured. Then, a target entry thickness He(N)_tgt is calculated (step S). Subsequently, a manipulated amount of rolling speed VR(N−2) and VR(N−k) are calculated (step S).

Control system of tandem cold rolling mill

An edge drop control device calculates a first calculated manipulated amount of a work roll shift device for bringing a difference between a measured edge drop amount and a target amount close to zero without using a work roll bender device. The edge drop control device calculates a second calculated manipulated amount of the work roll bender device for bringing a difference between a measured edge drop amount and the target amount close to zero without using a work roll shift device. The edge drop control device outputs, when the first calculated manipulated amount is out of an allowable range, the second calculated manipulated amount to the work roll bender device and also outputs a difference between an amount that corresponds to the second calculated manipulated amount and the first calculated manipulated amount, to the work roll shift device.

Edge drop control device

A manufacturing process monitoring apparatus capable of determining a manufacturing process is anomaly, without requiring any threshold value for determining the as anomaly is provided. The manufacturing process monitoring apparatus includes a data conversion unit configured to convert process data of a manufacturing facility, a feature value analysis unit configured to analyze the converted data based on information on feature values, a data restoration unit configured to restore data for each of a plurality of categories based on the information on the feature values and information on the analyzed result, a similarity calculation unit configured to calculate a similarity for each of the plurality of categories based on the data used when being analyzed and the restored data, a category determination unit configured to determine a category of the data based on the similarity for each of the plurality of categories, a category classification unit configured to classify the category to which the process data belongs, and a process state diagnostic unit configured to diagnose a state of the manufacturing process based on a result of comparison between the determined category and the classified category.

Manufacturing process monitoring apparatus

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

A roll position setting method for a Sendzimir mill that can easily adapt to combinations of roll sets and enables each roll to be set in a position optimal for operation. Each eccentric angle of first and second backing bearings is set by adjusting a bottom screw device so that an upper surface of the bottom work roll reaches a pass line of the rolled material based on first function. For top side roll setting, the eccentric angle of fourth backing bearings is set by adjusting top side screw devices so that a second function, different from the first function, is optimized.

Roll position setting method of Sendzimir mill

A strip thickness control apparatus for a rolling mill includes a strip thickness gauge provided on a delivery side of the rolling mill, a moving distance calculating module for calculating a moving distance of the strip from the rolling mill, a rolling roll angle-of-rotation calculating module for calculating an angle of rotation of the rolling roll, a strip thickness deviation calculating module for calculating a deviation of the strip thickness from a target value of the measured value of the strip thickness, a strip thickness deviation storage module for storing the strip thickness deviation by adding it for every angle of rotation of the rolling roll, a strip thickness deviation input determining module for determining an input timing for inputting the strip thickness deviation to the strip, thickness deviation storage, a strip thickness deviation output determining module for determining an output timing for outputting the strip thickness deviation stored in the strip thickness deviation storage module, and a manipulated variable calculating module for fetching the strip thickness deviation at the output timing determined and determining a manipulated variable of a roll gap controller.

Strip thickness control apparatus for rolling mill

The rolling data collecting system according to this invention collects rolling data of a rolled strip to be serially rolled through a tandem rolling mill, using the first rolling data measuring means installed at each roll stand and the second rolling data measuring means installed in the rolling line. The measuring point decision means decides a measuring point on a rolled strip which is used for measuring data by the first and second rolling data measuring means. The tracking means detects that the decided measuring point has reached each roll stand locating from the entry side of the tandem rolling mill and to the delivery side thereof, and the location of the second rolling data measuring means. Every time when the measuring point reaches each roll stand and the second rolling data measuring means, the rolling data collecting means collects the rolling data of the rolled strip or rolled strip measured by the first and second rolling data measuring means.

Rolling data collecting method and system

A flatness control apparatus for controlling the flatness of a strip in a hot rolling mill, wherein a strip width meter measures center line error values of the strip. The center line error values are the offsets of the center of the strip from the center of the hot rolling mill line and are positive if the center of the strip is offset toward a drive side of the mill. A flatness meter, installed on the delivery side of the mill, measures flatness of the strip at positions specified by the flatness control apparatus. Based on the center line error values and the flatness measurements, the flatness control apparatus calculates adjustments to be made to a work roll bending apparatus on a final stand in the mill in order to control strip flatness.

Flatness control apparatus for a hot rolling mill

A rolling mill is equipped with a work roll bending apparatus for controlling the strip crown of the strip. Upstream and downstream of the rolling mill are located strip crown meters which measure the thickness of the strip in the transverse direction. The variables of the work roll bending apparatus are manipulated, and determining the inheritance coefficient is determined on the basis of measurement values of the strip crown of the strip measured by the strip crown meters.

Apparatus for controlling a rolling mill based on a strip crown of a

The present invention includes the following constituent elements, namely:

Method and apparatus for the control of rolling mills

In the continuous rolling mills, the strip crown and the strip flatness of a strip can be controlled to any desired value. In the strip crown measuring method, the strip crown of the first stage rolling mill can be obtained by adding the set target strip crown value and a value obtained by multiplying the deviation in mechanical strip crown between the predicted value and the actually measured value by a imprinting ratio. Further, the strip crowns of the second and after rolling mills can be obtained by adding the set target strip crown, a value obtained by multiplying the deviation in mechanical strip crown between the predicted value and the actually measured value by a imprinting ratio, and a value obtained by multiplying the deviation in entry strip crown between the target value and the calculated measurement value by an inheritance coefficient, for each rolling mill. Further, in the control method of the continuous rolling mills, the rolling mill is controlled in correspondence to the deviation in strip crown between the value actually measured by the profile gauge and the previously calculated value, in such a way that the manipulated variables of the actuators of the rolling mills arranged on the upstream side of the rolling mill having the profile gauge are equal to each other or determined to a predetermined proportion by use of imprinting ratios and inheritance coefficients.

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Tokyo, Japan

Tomoyuki Tezuka