Method for the flying changing of working rolls in continuous casting and rolling installations and hot strip rolling mills using a hold-down roller

A technology for rolling equipment and roll replacement, applied in metal rolling stands, metal rolling, manufacturing tools, etc., can solve problems such as the impossibility of work roll replacement

Active Publication Date: 2013-02-13
SMS DEMAG AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Work roll replacement is also not possible in this case

Method used

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  • Method for the flying changing of working rolls in continuous casting and rolling installations and hot strip rolling mills using a hold-down roller
  • Method for the flying changing of working rolls in continuous casting and rolling installations and hot strip rolling mills using a hold-down roller
  • Method for the flying changing of working rolls in continuous casting and rolling installations and hot strip rolling mills using a hold-down roller

Examples

Experimental program
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Embodiment Construction

[0021] A conventional loop lifter 4 is located between the rolling stands 1 , 2 and 3 , via which the strip tension between the rolling stands can be adjusted. During a normal rolling process, as it is shown in FIG. 1 , neither the pressure roll 5 arranged before the rolling stand 2 nor, if present, the pressure roller 5 ′ arranged after the rolling stand is in contact with the hot rolling process. Band 6 is joined.

[0022] Now, for example, in order to change the work rolls in the middle rolling stand 2 , the rolls have to be approached, as shown in FIG. 2 .

[0023] Since the hot strip is then no longer or not allowed to come into contact with the work rolls, at least the pressure roll 5 arranged in front of the roll stand 2 is activated, precisely together with the ring lifter 4 associated with it, so that The hot strip (without contacting the work rolls) can be guided through the open rolling stand with a corresponding strip tension.

[0024] The quick change of the wor...

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Abstract

The invention relates to a method for the flying changing of working rolls in continuous casting and rolling installations and hot strip rolling mills, in particular continuous hot strip rolling mills, wherein, to exchange the working rolls by opening the roll stand (2), they can be disengaged from the hot strip to be rolled. According to the invention, a strip tension that can be regulated and substitutes the strip tension of the opened roll stand (2) can be applied to the hot strip (6) to be rolled, before and / or after it enters the opened roll stand (2), by means of at least one hold-down roller (5) that can be introduced into the rolling line.

Description

technical field [0001] The invention relates to a method for rapidly (fliegend) changing work rolls in cast rolling plants and hot strip trains, in particular continuous hot strip trains. Background technique [0002] The work rolls of rolling mills are subject to natural wear which can lead to a loss of surface quality of the rolled strip. [0003] To avoid this, the work rolls need to be replaced from time to time. [0004] In hot rolling, the strip to be rolled must be heated to the required temperature prior to rolling, which is the case in which it is rolled directly by casting heat. [0005] When using shorter furnaces without buffers or when removing furnaces for completely continuous casting and rolling, the casting operation must be stopped in order to change the work rolls in a completely continuous rolling operation. A production loss cannot thus be avoided. [0006] A completely continuous casting and rolling operation (Gie Öwalzbetrieb) with a long casting se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/46B21B31/08
CPCB21B39/08B21B31/12B21B31/08
Inventor C.克莱因F.本费尔E.温德豪斯
Owner SMS DEMAG AG
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