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Rolling control device, rolling control method and rolling control program

A technology of a control device and a control method, which is applied to the rolling mill control device, rolling force/roll gap control, metal rolling, etc., can solve the problem of difficult changes in the operating state of the rolling mill, stoppage of the device, and deterioration of the quality of the workpiece to be rolled. And other issues

Active Publication Date: 2012-03-21
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, in these time-series change patterns, it is difficult to respond to the nonlinear rolling phenomenon without causing the control state quantities of the rolling mill, that is, the variation in the thickness of the delivery side, the variation of the strip speed at the delivery side, and the variation of the strip speed at the delivery side. way to operate
In addition, the variation of the plate speed leads to the change of the tension, and the change of the tension further causes the variation of the plate thickness, the change of the plate speed of the sending side, and the change of the plate speed of the sending side. Therefore, it is difficult to minimize the deviation of the plate thickness and the actual tension from the set value. while changing the operating state of the rolling mill
As a result, problems such as deterioration of the quality of the rolled product and stoppage of equipment operation occur.

Method used

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  • Rolling control device, rolling control method and rolling control program
  • Rolling control device, rolling control method and rolling control program
  • Rolling control device, rolling control method and rolling control program

Examples

Experimental program
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Embodiment approach 1

[0060] In this embodiment, a case where the present invention is applied to dynamic thickness change (flying gauge change) of a two-stand continuous rolling mill will be described below. Such as figure 1 As shown, in a two-stand continuous rolling mill, a dynamic thickness change in which the thickness setting of a workpiece to be rolled is changed is implemented without stopping the rolling mill.

[0061] The so-called dynamic plate thickness change processing refers to changing the control target values ​​in rolling control, namely, the roll gap and roll speed, to correspond to the product specifications without stopping the rolling machine in order to produce rolled workpieces of different specifications. value processing. In addition to changing the target plate thickness, it is also possible to change the initial plate thickness of the rolled material supplied to the rolling mill.

[0062] This dynamic plate thickness change is a process for solving problems in product ...

Embodiment approach 2

[0119] In Embodiment 1, the method of obtaining the roll gap and the roll speed by successively calculating the optimum values ​​in the control cycle of the rolling mill control computer using a rolling simulator is shown, but a plurality of times may be assumed in advance. Sequential change patterns, using these patterns to simulate dynamic plate thickness changes, adopt time-series change patterns with the smallest evaluation function.

[0120] In this case, if Figure 16 As shown, a preset time-series pattern is sequentially selected by the time-series pattern selection device, and given to the time-series operation amount changing device 120, and the actual control operation terminal operation amount is given to the rolling simulator as a time-series change pattern 110. From the obtained control state quantity (time series quantity that becomes the dynamic plate thickness change region), obtain the square average sum of the deviations between the control state quantity and...

Embodiment approach 3

[0122] This method is not only applicable to rolling mills, but also applicable to control objects that need to change the control operation terminal in a feedforward manner according to a certain time-series pattern in order to change the control state quantity of the control object according to a certain time-series pattern.

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Abstract

The invention relates to a rolling control device and a rolling control method, so as to reduce the deviation between the actual rolling state quantity and a set value of the plate thickness, the tension, etc. when the operating state of a rolling mill is changed. The rolling control device for controlling a rolling mill which rolls a to-be-rolled piece is characterized in that the rolling control device comprises a control-operation-end change pattern storage part (102) which stores time series change patterns generated in advance, wherein the time series change patterns are used to allow the change of a gap between rollers of the rolling mill, the rotating speed and so on along with non-linear change of the rolling conditions; and an optimal-control-operation-end time series change pattern setting unit (103) which identifies the non-linear change of the rolling conditions, obtains the time series patterns corresponding to the non-linear change of the identified rolling conditions and outputs the obtained time series change patterns which are used for parameter control of the rolling operation.

Description

technical field [0001] The invention relates to a rolling control device, a rolling control method and a rolling control program, in particular to the control in the case of changing rolling conditions in the rolling control device. Background technique [0002] In the rolling mill, the rolling operation is performed by controlling the tension and the rolling load applied to the workpiece to be rolled using the interval between the upper and lower work rolls, that is, the roll gap, and the roll speeds of the equipment before and after the rolling mill. In the rolling operation, the control operation amount of the rolling machine, that is, the roll gap and the roll speed, is operated according to the pattern of the preset control operation amount of the rolling machine, and the control state amount of the rolling machine, that is, the plate thickness and tension of the rolled piece, is implemented. , Feedback control to maintain the rolling load at the set value. [0003] He...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/00B21B37/24B21B37/46B21B37/48B21B37/58
Inventor 服部哲铃木一史福地裕
Owner HITACHI LTD