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Tandem rolling mill control device and tandem rolling mill control method

A rolling mill control, tandem technology, applied in the direction of rolling mill control device, rolling force/roll gap control, driving device for metal rolling mill, etc. question

Active Publication Date: 2019-08-02
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, when the material to be rolled is bitten into each stand, the movement is unstable, the shape of the material to be rolled is disturbed between the stands and the exit side of the final stand, and the tension fluctuation between the stands becomes abnormally large.

Method used

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  • Tandem rolling mill control device and tandem rolling mill control method
  • Tandem rolling mill control device and tandem rolling mill control method
  • Tandem rolling mill control device and tandem rolling mill control method

Examples

Experimental program
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Effect test

no. 1 Embodiment approach

[0038] figure 1 It is a figure which shows the example of the structure of the tandem rolling mill control apparatus 100 and its control object 150 which concerns on 1st Embodiment of this invention. Such as figure 1 As shown, the tandem rolling mill control device 100 according to the first embodiment receives various signals from the controlled object 150 and outputs various control signals to the controlled object 150 accordingly.

[0039] In the present embodiment, the control object 150 is a hot tandem rolling mill including a finishing mill 160 . Finishing mill 160 is made up of a plurality of rolling stands 161, and in the present embodiment, for disposing 7 rolling stands 161 (F 1 ~F 7 ) composition. In addition, this structure is a general structure of a tandem hot rolling mill.

[0040] existfigure 1 In this process, the steel plate 163 as the material to be rolled is moved from left to right, and the raw material 165 with a thickness of about 30 to 40 mm rolled...

no. 2 Embodiment approach

[0173] Figure 10It is a figure which shows the example of the structure of the tandem rolling mill control apparatus 100a which concerns on the 2nd Embodiment of this invention centering on the process structure in the load balance maintaining part 110. The tandem rolling mill control device 100a according to the second embodiment is similar to that of the first embodiment only in that the control parameter extraction unit 1001, the control parameter storage unit 1002, and the control parameter retrieval auxiliary storage unit 1003 are added. The in-line rolling mill control device 100 is different.

[0174] The control parameter extraction unit 1001, for the proportional gain Kp as the control parameter used in the pressing position correction amount calculation unit 906 i and integration time T i , obtain a value suitable for the steel plate 163 to be rolled next time. Moreover, the obtained proportional gain Kp i and integration time T i The value of is output to the ...

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Abstract

The invention relates to a tandem rolling mill control device and tandem rolling mill control method, and aims to achieve an effect that a preset good load balance can also be maintained even if a rolled material is being rolled. The tandem rolling mill control device (100) has a setting control unit (101) which sets a rolling load and pressing position before rolling of a steel plate (163), a setload ratio calculation unit (104) which calculates a set load ratio of each rolling mill seat (161), and also includes an actual load ratio calculation unit (904) which calculates an actual load ratio of each rolling mill seat (161) during rolling of the steel plate (163) and a pressing position control unit which controls the pressing position of an upstream machine seat (901) adjacent to a downstream machine seat (902) so as to reduce a deviation of the actual load ratio of the downstream machine seat (902) from the set load ratio.

Description

technical field [0001] The invention relates to a tandem rolling mill control device and a tandem rolling mill control method. Background technique [0002] In the tandem rolling, it is important to roll the material to be rolled so that the loads of the respective rolling stands are moderately balanced. Here, the value obtained by dividing the load of each rolling stand by the sum of the loads of all the rolling stands is called the load ratio of each rolling stand. The pattern (Japanese: パターン) formed by the load ratio of the seat is called load balance. [0003] In tandem rolling, if this load is not well balanced, various undesirable situations can arise. For example, the motion when the material to be rolled is bitten into each stand is unstable, the shape of the material to be rolled is disturbed between the stands and at the exit side of the final stand, and the tension fluctuation between the stands becomes abnormally large. Therefore, in order to perform tandem ro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/00
CPCB21B37/00B21B2271/02B21B2275/04B21B37/58
Inventor 鹿山昌宏服部哲榎田光一
Owner HITACHI LTD