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Rolling control device and rolling control method

A technology for control devices and rolling materials, applied in the direction of rolling mill control devices, metal rolling, metal rolling, etc.

Active Publication Date: 2014-07-02
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, only the plate thickness between the rolling stands and the rolling stands (hereinafter referred to as "intermediate plate thickness") can only be estimated, and improving the estimation accuracy of the intermediate plate thickness has long been an important issue

Method used

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  • Rolling control device and rolling control method
  • Rolling control device and rolling control method
  • Rolling control device and rolling control method

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Experimental program
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Embodiment Construction

[0037] Hereinafter, embodiments of the present invention will be described in detail using the drawings. In the rolling system of the present embodiment, rough rolling in which a raw material slab is reciprocally rolled to an intermediate thickness, and finish rolling in which the rough-rolled steel material is continuously rolled to a target thickness with high precision are performed. Then, in finish rolling, based on the error between the plate thickness on the entry side of the initial mill stand obtained by the mass flow conservation law and the plate thickness on the entry side of the initial mill stand obtained by different methods, the The intermediate plate thickness obtained by the mass flow conservation law is corrected. This makes it possible to increase the accuracy of the estimated value of the intermediate thickness. As a result, it is possible to stabilize the rolling at the front end of the steel sheet and produce a high-quality steel sheet.

[0038] figure ...

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PUM

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Abstract

The invention provides a rolling control device and a rolling control method, wherein the plate thickness between the pedestals can be calculated in a high-efficiency manner without additionally arranging any special hardware. The centring arrangement of a plurality of rollers is adopted, the thickness of the plate on the outlet side opposite to the roller of the last segment of the rolling sequence can be acquired, and based on the plate thickness of the outlet side, the plate thickness of the inlet side can be calculated according to the mass-flow conservation principle. The calculated result of the plate thickness of the inlet side opposite to the roller can be used for the repeated calculation of the plate thickness of the rolled material sent by the roller pair abutting against the front part, and therefore the plate thickness of the inlet side of the roller pair can be calculated, the error between the plate thickness of the inlet side of the roller pair arranged on the starting end and the plate thickness of the roller pair calculated by using other methods can be calculated. Based on the calculated errors, the above mentioned errors can be corrected.

Description

technical field [0001] The present invention relates to a rolling control device and a rolling control method. More specifically, the present invention relates to high accuracy of an estimated value of an intermediate plate thickness based on the law of conservation of mass flow rate. Background technique [0002] There is a tandem rolling mill that obtains a desired plate thickness by arranging a plurality of rolling stands and rolling a material to be rolled a plurality of times. In such a continuous rolling mill, mass flow thickness control may be performed. In this mass flow thickness control, the speed of the rolled strip is detected to obtain an estimated value of the thickness directly below the rolling mill (hereinafter referred to as "mass flow rate estimation plate thickness"), and perform plate thickness control. [0003] In order to stabilize the rolling when the front end of the steel plate to be rolled gradually bites into each rolling stand, and to obtain a h...

Claims

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Application Information

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IPC IPC(8): B21B37/18
Inventor 鹿山昌宏林刚资小林拓也
Owner HITACHI LTD
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