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Method and nozzle arrangement for variable-width lubrication of rolling nip of rolling stand

A rolling mill and nozzle technology, applied in the field of lubricating rolls, can solve problems such as the weakening of sufficient mixing effect

Inactive Publication Date: 2004-08-04
SMS DEMAG AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If here the thorough mixing of oil and water is designed for the maximum volume flow, then at the minimum bandwidth and thus at the minimum volume flow, the thorough mixing effect is significantly reduced due to the reduced flow velocity

Method used

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  • Method and nozzle arrangement for variable-width lubrication of rolling nip of rolling stand
  • Method and nozzle arrangement for variable-width lubrication of rolling nip of rolling stand
  • Method and nozzle arrangement for variable-width lubrication of rolling nip of rolling stand

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Embodiment Construction

[0029] figure 1 A device for lubricating rolls or roll gaps with adjustable width in a rolling mill (not shown) according to the prior art is shown with a water supply 2 and an oil line 3 . Both substances are supplied to the device under pressure. Reference numerals 4 and 7 denote flow meters for water and oil, respectively. Mark 6 represents a metering pump for dispensing a small amount of emulsified oil. Reference 1 denotes a water mixer known per se, in which water and oil are intimately mixed with each other. S1-S3 designate three switching valves which are switched individually, for example by means of compressed air 9 . Each switching valve S1-S3 is connected to an injection zone Z1-Z3 respectively.

[0030] In the example shown, spray zone Z1 is equipped with four nozzles d1-d4. Spray zone Z2 is equipped with four switchable nozzles d6, while spray zone Z3 is also equipped with two further nozzles d7.

[0031] if now as figure 1 The spray zone Z1 shown is connec...

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Abstract

The invention relates to a method for lubricating rolls, in particular for lubricating a rolling nip in rolling stands for rolled strips. According to the invention, said lubrication takes place using an oil-in-water dispersion whilst maintaining both a predetermined blend characteristic and a volumetric flow of the dispersion. The dispersion is prepared in the form of a homogeneous blend in a mixer (1) using adjustable quantities of water and oil. The dispersion is supplied to various spray zones (Zi) for a distribution (Bi) that is variable in width. Said method for roll lubrication can be improved by the allocation of at least one row of nozzles (Di) to each spray zone (Zi), which has a corresponding spray range width (Bi), each nozzle being controlled by at least one relay valve (Si).

Description

technical field [0001] The present invention relates to a method for lubricating rolls and in particular roll gaps in a strip mill using a water-oil emulsion in which the emulsion is mixed in a A homogeneous emulsion is prepared with adjustable water and oil quantities in the dispenser and delivered to different spray zones to distribute the emulsion variably over a bandwidth. The invention also relates to a nozzle arrangement for carrying out the method of the invention. Background technique [0002] The production of emulsions in the form of water-oil mixtures, which are composed of oil droplets in water, but which are mutually immiscible and whose components remain incompatible, is of decisive importance for roll lubrication and especially for roll gap lubrication. Change. At the same time, the emulsion must be coordinated with the width-dependent roll lubrication or roll gap lubrication with respect to the width of the rolled strip. [0003] In the known roll gap lubr...

Claims

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Application Information

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IPC IPC(8): B21B27/10B21B45/02
CPCB21B45/0251B21B27/10
Inventor J·阿梅纳特R·-F·耶格尔J·赛德尔H·霍普芬茨H·策尔夫
Owner SMS DEMAG AG
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