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Tension control device of hot mill and control method

A technology of tension control and hot rolling mill, applied in the direction of tension/pressure control, etc., which can solve problems such as insufficient, plate width changes, etc.

Active Publication Date: 2012-11-14
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the influence of the change in tension on the change in the width of the plate is not sufficiently considered, so there are cases where the width of the plate varies at the front and rear ends of the steel plate and other parts.

Method used

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  • Tension control device of hot mill and control method
  • Tension control device of hot mill and control method
  • Tension control device of hot mill and control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] figure 1 Shows the first embodiment of the present invention. In the tension control of the hot rolling mill of the first embodiment, it is characterized in that the driving device for driving the stand is corrected based on the temperature at the exit side of the hot rolling mill. exist figure 1 Among them, the tension control device 15 receives various signals from the controlled object 10 (hot rolling mill), and outputs control signals to the controlled object 10 .

[0071] First, the configuration of the controlled object 10 will be described. In the present embodiment, the control object 10 is a tandem mill that continuously rolls a steel plate 103 using a plurality of stands 101 . The steel plate 103 moves from the left side to the right side in the drawing, and the steel plate 103 is gradually thinned as it travels from the upstream first stand 101F to the downstream second stand 101B. In addition, there are actually a plurality of stands upstream, and an ord...

Embodiment 2

[0138] Figure 9 Shows the second embodiment of the present invention. exist Figure 9 In this method, the correction value of the tension command is calculated using the hot rolling mill entry side temperature Mb instead of the hot rolling mill exit side temperature Mf, and the driving device as the operation end is driven. Figure 9 The composition and function except for this point are and figure 1 exactly the same.

[0139] Figure 10 Processing performed by the tension command correction mechanism 901 is shown. The tension command correcting means 901 first acquires the target value Mb of the hot-rolling mill entry-side temperature from the hot-rolling mill entry-side temperature target value storage means 903 in step S101. Although the target value Mbs of the entry-side temperature of the hot rolling mill may be fixed, it may be set to a different value depending on the location of the steel sheet.

[0140] Next, in step S102, the actual value Mb of the temperature...

Embodiment 3

[0155] Figure 11 A third embodiment of the present invention is shown. exist Figure 11 In , the correction value of the tension command is calculated using the temperature at the entry side of the rolling mill and the temperature at the exit side of the rolling mill, and the driving device as the operating end is driven. Figure 11 composition and function, except for this point and figure 1 exactly the same.

[0156] Figure 12 The process performed by the tension command correction means 1101 is shown. The tension command correcting means 1101 first acquires the target value Mbs of the hot-rolling mill entry-side temperature from the hot-rolling mill entry-side temperature target value storage means 903 in step S101. Next, in step S102 , the target value Mbf of the hot rolling mill exit temperature is acquired from the hot rolling mill exit temperature target value storage means 170 . The target value Mbs of the temperature at the entry side of the hot rolling mill a...

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Abstract

The invention provides a tension control device of a hot mill and a control method, for reducing the plate width deviation caused by the steel plate temperature effects. By taking a hot mill possessing a plurality of rolling racks and a looper between the racks as a control object, the tension control device of the hot mill for setting the tension of a steel plate passing through the hot mill as a desired value, comprises a tension instruction storing mechanism which stores tension instruction values; a tension instruction correcting mechanism which obtains the detection temperature of a thermometer used for measuring the temperature of the steel plate, and corrects the tension instruction value according to the deviation of the target temperature and the detection temperature of the steel plate; and a tension control mechanism which adjusts the hot mill according to the deviation of the corrected tension instruction value and the detected tension value.

Description

technical field [0001] The present invention relates to a tension control device and a control method for a hot rolling mill, and in particular to a hot rolling machine suitable for stabilizing the tension control of steel plates between stands and reducing poor quality of steel plates such as changes in plate thickness or width shrinkage. Machine tension control device and control method thereof. Background technique [0002] As a prior art for controlling steel sheet tension between stands of a hot rolling mill with attention paid to the sheet width and thickness accuracy of the steel sheet, there are the following methods. [0003] Patent Document 1 describes a method of measuring the actual value of the strip width with a strip width gauge provided on the exit side of the finishing stand, and correcting the tension set value so that the actual value becomes the target value of the strip width. . [0004] Patent Document 2 discloses a control method based on the time se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/48
Inventor 鹿山昌宏小林拓也
Owner HITACHI LTD
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