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Tail-end meandering control device of tandem mill

A control device and technology for tandem rolling mills, which are used in rolling mill control devices, length measuring devices, metal rolling, etc., and can solve the problems of poor yield and reduced productivity.

Active Publication Date: 2021-03-23
TOSHIBA MITSUBISHI-ELECTRIC IND SYST CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, problems such as poor yield or decreased productivity develop

Method used

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  • Tail-end meandering control device of tandem mill
  • Tail-end meandering control device of tandem mill
  • Tail-end meandering control device of tandem mill

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0046] figure 1 It is a figure for demonstrating the system structure concerning Embodiment 1 of this invention. figure 1 The system shown includes a tandem rolling mill 1 and a tail end meandering control device 2 . The tail-end meandering control device 2 is a control device for controlling the roll gap and the peripheral speed of the rolls of the tandem rolling mill 1 so that the rolled material 3 on the exit side of the tandem rolling mill 1 has a desired thickness (not shown). a part of.

[0047] (tandem mill)

[0048] The tandem rolling mill 1 is a tandem type of rolling mill called a strip mill in which a plurality of rolling stands are arranged close to each other in series in a hot rolling facility or a cold rolling facility, and one piece to be rolled is continuously rolled. Continuous rolling mill.

[0049] The tandem rolling mill 1 has n (n is a natural number equal to or greater than 3) rolling stands. exist figure 1 In , a tandem rolling mill 1 having three r...

Embodiment approach 2

[0086] (system structure)

[0087] Next, refer to image 3 Embodiment 2 of the present invention will be described. image 3 It is a figure for explaining the system structure concerning Embodiment 2 of this invention. image 3 In the system structure shown, in addition to the addition of the ith differential load calculation unit 31, the tail end escape timing calculation unit 32, the i-th differential load storage unit 33, the i-th differential load variation calculation unit 34, and the i-th leveling operation amount calculation unit 35 these points, and the processing of the leveling operation amount output unit 28 is changed, and figure 1 is the same.

[0088] The system according to the second embodiment executes the feedback control based on the differential load of the i-th rolling stand simultaneously with the feedforward control based on the differential load of the i-1th rolling stand described in the first embodiment.

[0089] The i-th differential load calcula...

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PUM

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Abstract

An object of the present invention is to provide a tail end meandering control device for a tandem rolling mill which can appropriately reduce the occurrence of meandering of a rolled material due to the tail end slipping out. The tail-end meandering control device (2) has the following structure. The conveying distance calculation unit (26) calculates the time to pass through the i-1th work roll (11b) after the tail end of the rolled piece (3) passes through the i-2th work roll (11c) after the tail end exit timing. The conveying distance of the rolled piece (3). The leveling operation amount management unit (27) stores the leveling operation amount in the storage area after the tail end release timing. In addition, after the conveying distance reaches the inter-roll distance from the i-1th work roll (11b) to the i-th work roll (11a), the leveling operation amount management unit (27) is linked with the increase in the conveying distance. Read the leveling operation amount from the storage area. The leveling operation amount output unit (28) outputs the leveling operation amount read by the leveling operation amount management unit (27) to the i-th depressing device (14a).

Description

technical field [0001] The invention relates to a tail-end meandering control device of a tandem rolling mill. Background technique [0002] In hot rolling equipment and cold rolling equipment, there is known a strip mill (Strip mill) in which a plurality of rolling stands are arranged close to each other in series to continuously roll one to-be-rolled product. Continuous rolling mills in the form of columns (tandem mills). [0003] When the tail end of the rolled piece passes through the rolling stand, the tension acting as a restraining force so far disappears, and meandering may occur sharply. Said meandering is a phenomenon in which the width center of the rolled piece moves to the working side or the driving side. When meandering occurs, the difference between the rolling loads on the working side and the driving side (hereinafter referred to as differential load) increases, leading to further development of meandering. If the meandering progresses, there is a possib...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/20
CPCB21B37/20B21B15/00B21B37/68B21B38/08B21B2015/0071
Inventor 山崎之博佐野光彦
Owner TOSHIBA MITSUBISHI-ELECTRIC IND SYST CORP