Kabushiki Kaisha Toshiba

Kawasaki Steel Corporation

Noriyasu Okitani

Tomoyuki Tezuka

Yoshiharu Anbe

Nobuaki Nomura

Yoshito Goto

Yoshimitsu Fukui

Taichi Hatashita

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

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.

Strip crown measuring method and control method for continuous rolling

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Urawa, Japan

Noriyasu Okitani