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Board width controller of hot rolling mill and control method thereof

A control device, a technology for a hot rolling mill, applied in the direction of a metal rolling stand, a metal rolling mill stand, etc., and can solve the application and other problems

Inactive Publication Date: 2009-12-02
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the method of said prior art cannot be applied as it is in a rolling plant with a Stekel rolling mill

Method used

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  • Board width controller of hot rolling mill and control method thereof
  • Board width controller of hot rolling mill and control method thereof
  • Board width controller of hot rolling mill and control method thereof

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0049] figure 1 It is a conceptual diagram which shows the structure of the control system S provided with the panel width control apparatus 100 which concerns on 1st Embodiment of this invention.

[0050] (Structure of control system S having board width control device 100)

[0051] The control system S having the strip width control device 100 of the first embodiment includes: a hot rolling mill 150, that is, hot rolling equipment; and a strip width control device 100, which receives various signals from the hot rolling mill 150 and outputs control signals to the edger 151 of the hot rolling mill 150 to be controlled, and the roll gap between the rolls 151r of the edger 151 is controlled.

[0052] (hot rolling mill 150)

[0053] First, the configuration of the hot rolling mill 150 to be controlled by the strip width control device 100 will be described.

[0054] The hot rolling mill 150 is equipment generally called a small rolling mill that performs a unified casting / rol...

no. 2 Embodiment approach

[0210] Next, the control system 2S of the second embodiment will be described.

[0211] Figure 10 It is a conceptual diagram showing the configuration of a control system 2S including an adaptive gain calculation unit 10001 in the panel width control device 100 according to the second embodiment of the present invention.

[0212] 2nd Embodiment The panel width control apparatus 100 of 1st Embodiment includes the adaptive gain calculation part 10001 which calculates adaptive gain (beta) (refer formula (12)).

[0213] Since the other configurations are the same as those of the first embodiment, the same components are given the same reference numerals, and detailed descriptions are omitted.

[0214] The adaptive gain calculation unit 10001 in the panel width control device 100 according to the second embodiment learns from the panel width deviation accumulating unit 104 (refer to Figure 4) to obtain the recent width deviation ΔWact and adaptive value ΔWadap of the steel plat...

no. 3 Embodiment approach

[0241] Figure 13 It is a figure explaining the thickness control apparatus concerning this embodiment. The panel width control device 1100 receives various signals from the controlled object 1200 and outputs the control signal to the controlled object 1200 . First, the configuration of the control object 1200 will be described.

[0242] The control object 1200 is the width control line (line) of the hot rolling mill. The slab 1205 with a width of 1000 mm to 1600 mm extracted from the slab extraction part 1210, that is, the heating furnace 1215, is drawn in the width direction by the width rolling mill 1225 of the width rolling part 1220. Rolling is performed, and the rough rolling mill 1235 of the rough rolling section 1230 performs 3-pass to 7-pass reciprocating rolling. Here, the width rolling mill 1225 and the rough rolling mill 1235 are provided adjacent to each other, and reciprocating rolling is simultaneously performed in the width rolling mill 1225 and the rough rol...

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Abstract

The present invention provides a board width controller of a hot rolling mill and a control method thereof. The fine finishing width reduction amount can be estimated with a high precision in a preset stage for controlling the board width without the dependence to the fine rolling. The board width controller of the hot rolling mill controls the board width of hot-rolled strip coil to a target board width given by the manufacturing instruction. The controller comprises the following components: a width roller which rolls the heated steel bar in the width direction; a roughing mill which is adjacent with the width rolling mill and rolls the steel bar obtained after the rolling the width rolling mill in the board thickness direction; and a finishing mill which further rolls the steel bar obtained after the rolling of the width rolling mill and the roughing mill in the board thickness direction for producing the hot-rolled strip coil. The board width controller further comprises the following components: a fine finishing width reduction estimation amount calculating part which estimates the board width reduction amount of the finishing mill; and a first board width target modifying part, wherein, the control instruction calculated based on the target board width modified by the modifying part is output to the width rolling mill.

Description

technical field [0001] The invention relates to a strip width control device and a control method of a hot rolling mill. Background technique [0002] Currently, as a conventional method for controlling the strip width of a hot rolling mill, for example, in JP Unexamined Patent Publication No. 2007-50413 (Document 1), a method is shown in which rolling case data is stored for each operation element, The finishing width is predicted with high accuracy based on the data of the operating elements similar to the material to be rolled, and the control is performed based on the predicted information. [0003] In addition, JP 2002-224723 (Document 2) discloses a method of defining a strip width prediction formula correction term as a function of the content of component elements of the rolled material, and using this method in strip width control. fix. [0004] Furthermore, JP Unexamined Patent Publication No. 9-225513 (Document 3) discloses a method of learning rough rolling act...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/22
Inventor 鹿山昌宏栗林健林刚资
Owner HITACHI LTD
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