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Tandem rolling mill tail end meander control device

A technology for control devices and tandem rolling mills, which is applied to rolling mill control devices, metal rolling, length measuring devices, etc., and can solve problems such as yield deterioration and productivity decline

Active Publication Date: 2019-12-27
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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  • Tandem rolling mill tail end meander control device
  • Tandem rolling mill tail end meander control device
  • Tandem rolling mill tail end meander control device

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

The objective of the present invention is to provide a tandem rolling mill meander control device capable of reducing the occurrence of rolled stock meander, generated as a result of tail-out. A tailend meander control device (2) has the following configuration. A conveyed distance calculating unit (26) calculates a conveyed distance of rolled stock (3) when a tail end of the rolled stock (3) passes through (i-1)th work rolls after a tail-out timing at which the tail end of the rolled stock (3) passed through (i-2)th work rolls (11c). After the tail-out timing, a leveling operation amount management unit (27) accumulates a leveling operation amount in a storage area. In addition, after the conveyed distance has reached an inter-roll distance from the (i-1)th work roll (11b) to an i-th work roll (11a), the leveling operation amount management unit (27) reads the leveling operation amount from the storage area as the conveyed distance increases. A leveling operation amount output unit (28) outputs the leveling operation amount read by the leveling operation amount management unit (27) to an i-th rolling 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 Applications(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