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

A technology of roll gap and rolling mill, which is applied in the field of lubricating rolling mill roll gap and nozzle arrangement with variable width, and can solve the problem of weakening of sufficient mixing effect

Inactive Publication Date: 2006-01-11
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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Experimental program
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Embodiment Construction

[0031] figure 1 The shown device according to the prior art for the width-adjustable roll or roll gap lubrication in a rolling mill (not shown) shows a water supply 2 and an oil pipe 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.

[0032] 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.

[0033] if now as figure 1 The spray zone Z1 shown is connected...

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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 roll gaps in a strip mill, said roll gap lubrication being carried out with an oil-water emulsion and observing defined mixing characteristics of the emulsion and defined volume flow rates of the emulsion, said emulsion in a A homogeneous emulsion is prepared in the water mixer with adjustable quantities of water and oil and delivered to different injection zones for variable bandwidth distribution, each of which has a corresponding injection bandwidth At least one nozzle row, each controlled by at least one switching valve, the invention also relates to a nozzle arrangement for carrying out the method according to the invention. Background technique [0002] The creation of emulsions in the form of water-oil mixtures, which are composed of oil droplets in water, but which are mutually immiscible and whose composition remains unchanged, is of decisive importance for roll lubrication and especial...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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