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Method for controlling thermal crown of work rolls in hot continuous rolling finishing mill

A technology for finishing mills and work rolls, which is applied to rolls, manufacturing tools, temperature control, etc., and can solve problems such as thickening of strip steel, large wedge shape, and irregular cross-sectional shape of hot-rolled strip steel

Active Publication Date: 2016-01-06
PANGANG GRP PANZHIHUA STEEL & VANADIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen from the figure that the thermal crown of the strip is too small (even negative crown) and the wedge is too large, which makes the section shape of the hot-rolled strip irregular, resulting in a local increase in the strip at the edge of 40mm-60mm. thick
[0005] The reason for the above defects is that in the above-mentioned finishing mill, in order to ensure uniform cooling along the width direction of the work rolls, the cooling water of the work rolls is almost evenly distributed
This cooling method ignores the effect of the actual distribution of heat carried by the strip on the surface of the work rolls

Method used

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  • Method for controlling thermal crown of work rolls in hot continuous rolling finishing mill
  • Method for controlling thermal crown of work rolls in hot continuous rolling finishing mill
  • Method for controlling thermal crown of work rolls in hot continuous rolling finishing mill

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Embodiment Construction

[0052] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0053] refer to Figure 2a to Figure 2f , The invention provides a method for controlling the thermal crown of the work rolls of the hot continuous rolling finishing mill. According to an embodiment of the present invention, the hot tandem rolling finishing unit includes at least three finishing rolling mills arranged in sequence along the rolling direction, for example but not limited to six finishing rolling mills. The work rolls of each finishing mill include an entrance section and an exit section, and the work rolls of each finishing mill include an upper roll and a lower roll. According to an embodiment of the present invention, an entrance cooling unit ...

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Abstract

The invention discloses a method for controlling thermal convexity of a work roll of a hot continuous rolling finish rolling unit. The method includes reducing cooling strength of two lateral portions of the work roll when the thermal convexity of the work roll needs to be reduced. The thermal convexity of the work roll is reduced by controlling the cooling water distribution mode of the work roll, and product quality of hot continuous rolling belt steel is improved.

Description

technical field [0001] The invention relates to the field of steel rolling, in particular to a method for controlling the thermal crown of work rolls of a hot continuous rolling finishing mill. Background technique [0002] The work rolls of the hot continuous rolling finishing mill play a pivotal role in the entire hot continuous rolling equipment, which determines the variety, specification and product quality rolled by the entire production line. The quality of the thermal crown control of the work rolls in the production of hot continuous rolling ultimately determines whether the rolling production is stable. Controlling the thermal crown of the work rolls in the hot continuous rolling and finishing mills to control the cross-sectional shape of the strip is a key link in product quality control. Control the cross-sectional shape of the hot-rolled strip, that is, control the crown and wedge of the strip. In the hot tandem rolling finishing mill, the work rolls are in di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/74B21B1/46B21B27/10
Inventor 朱自军刘勇吕敬东石长清李卫平杨智杰罗击孙士先卢成刚
Owner PANGANG GRP PANZHIHUA STEEL & VANADIUM