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Method and plant for the hot rolling of strip

a technology of hot rolling and strip, which is applied in the direction of metal rolling, resilient suspension, lifting devices, etc., can solve the problems of low temperature of broken strip entering the steckel finishing stand, limited predetermined charge weight of the product, and load in the finishing stand

Inactive Publication Date: 2004-05-13
KRAMER STEPHAN
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  • Abstract
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  • Claims
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Problems solved by technology

This results in the disadvantage that either the length of the broken-down strip, and thus, the predetermined charge weight of the product are limited, or that the plant requires a relatively large space, wherein, in that case, there is the additional disadvantage that the broken-down strip enters the Steckel finishing stand with a low temperature because of the heat loss occurring on the relatively long transport path between roughing stand and Steckel finishing stand.
The increased load in the finishing stand caused by the lower temperature of the strip has a disadvantageous effect on the finish-rolling process, wherein additionally smaller reductions are achieved in each pass.

Method used

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  • Method and plant for the hot rolling of strip
  • Method and plant for the hot rolling of strip

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Embodiment Construction

[0021] The following parameters are given:

[0022] Weight: 18 kg / mm

[0023] Thickness of broken-down strip: 25 mm

[0024] Length of broken-down strip: 94,74 mm

[0025] In the conventional plant according to FIG. 1, the distance between the roughing stand 1 and the finishing stand 3 is approximately 120 m, wherein the number of passes in the roughing stand 1 is n. The broken-down strip 10 just rolls out freely onto the intermediate roller table 2 between the roughing stand 1 and the cropping shears 4.

[0026] In accordance with the present invention as illustrated in FIG. 2, when the roller table is shortened to a length A.sub.2 in accordance with a broken-down strip length during pass n-2, tandem rolling in roughing stand 1 and finishing stand 3 takes place because the strip 10 having the length L.sub.2 is longer than the distance A.sub.2 between the roughing stand 1 and the finishing stand 3.

[0027] Coil weight: 18 kg / mm

[0028] Thickness of broken-down strip (n-2): 25 mm.times.1 / 0.75.times.1 / 0...

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Abstract

A method and a plant for the hot rolling of strip, in which the rolling stock is rolled in at least one reversing roughing stand with a number of roughing passes into a broken-down strip, and the broken-down strip is transported over an intermediate roller table into at least one Steckel finishing stand and the strip is finish-rolled in the finishing stand with a number of passes into a finished strip having a predetermined thickness, and the strip is finally wound into a coil. The length of the intermediate roller table determined by the length of the broken-down strip is shortened and tandem rolling is carried out in the roughing stand and the finishing stand at least during the last breaking-down pass of the strip.

Description

[0001] 1. Field of the Invention[0002] The present invention relates to a method and a plant for the hot rolling of strip, in which the rolling stock is rolled in at least one reversing roughing stand with a number of roughing passes into a broken-down strip, and the broken-down strip is transported over an intermediate roller table into at least one Steckel finishing stand and the strip is finish-rolled in the finishing stand with a number of passes into a finished strip having a predetermined thickness, and the strip is finally wound into a coil.[0003] 2. Description of the Related Art[0004] In a method and a plant for carrying out the method in the prior art, it is conventional to select the length of the roller table between the roughing stand and the Steckel finishing stand in such a way that, after emerging from the roughing stand, the broken-down strip rests "freely" between the roughing stand and the cropping shears. Accordingly, the length of the roller table is essentially...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B21B1/26B21B1/34B21B37/52B60G17/005B66F9/10
CPCB21B1/26B21B37/52B21B1/34B21B39/02
Inventor KRAMER, STEPHAN
Owner KRAMER STEPHAN
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