Rolling mill temperature control

A flatness and low-temperature fluid technology, applied in temperature control, metal rolling, contour control, etc., can solve problems such as high kerosene flow velocity, achieve the effect of eliminating fire prevention equipment, eliminating fire risk, and reducing environmental impact

Inactive Publication Date: 2011-11-23
LINDE AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Flatness control of hot work rolls is mentioned, however, described as being achieved by using a combination of inert gas and conventional coolants, which in the field of aluminum rolling implies higher kerosene flow velocities and all that goes with it equipment and security issues

Method used

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  • Rolling mill temperature control
  • Rolling mill temperature control
  • Rolling mill temperature control

Examples

Experimental program
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Embodiment Construction

[0052] figure 1 A schematic representation of a rolling mill stand 1 according to the invention is shown with an aluminum strip or foil 2 passing through the stand from left to right as indicated by the arrows. The mill work rolls 3 and back-up rolls 4 are positioned and rotated to perform metal thickness reduction as is well known in the prior art. The metal 2 to be rolled has a very thin and uniform layer of suitable rolling lubricant applied to it before entering the area shown in the illustration. With the present invention, lubricant flow rates of less than 10 liters / minute are generally sufficient.

[0053] The local temperature of work roll 3 (and its diameter) is controlled during rolling as follows:

[0054] A cryogenic storage and delivery system 5 supplies cryogenic coolant to a coolant applicator 7 via an insulated and shielded feed tube 6 . In this embodiment, the cryogenic coolant applicator 7 is located on the exit side of the rolling mill, which can be locat...

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PUM

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Abstract

The disclosed invention is a new concept for controlling the flatness of the strip during the rolling of aluminium strip or foil (2). The system consists of a full width bank of cryogenic roll cooling devices (7) acting on the roll (s) (4) and a full width bank of roll heating devices (8) also acting on the roll(s). Both or either of the cooling and heating banks are divided into individually controllable zones. A process automation system controls the action of the cooling and heating banks via feedback from a strip shape meter (9) and / or a predictive process model, in order, by thermal growth / contraction, to create the best roll profile for rolling flat strip.

Description

technical field [0001] This invention relates to the field of aluminum strip or foil mills and describes a new method that will improve roll temperature control, thereby improving strip flatness and bringing other safety and production benefits. Background technique [0002] The process of rolling aluminum requires lubricants to obtain a satisfactory surface finish with higher compression. However, even with lubricants, the rolling process generates a large amount of heat that must be dissipated to prevent overheating of the equipment and breakdown of the lubricating oil. Additional cooling of the rolls is therefore required. Currently, this is only possible in two ways: [0003] Small numbers of rolling mills that roll cooler aluminum strip or foil use water-based emulsions as rolling coolants and lubricants. Since water has a high cooling capacity, while the oil content can be adjusted to produce good lubricating properties, this seems to be an ideal solution. However,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B3/00B21B27/10B21B37/32
CPCB21B2027/103B21B15/005B21B3/00B21B38/00B21B9/00B21B27/10B21B27/106B21B38/02B21B37/32B21B2003/001B21B37/74
Inventor P.R.奥斯博恩A.D.麦雷P.D.史密斯
Owner LINDE AG
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