EP1512469A1 - Verfahren und Vorrichtung zur Schmierung von Walzwerkswalzen - Google Patents

Verfahren und Vorrichtung zur Schmierung von Walzwerkswalzen Download PDF

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Publication number
EP1512469A1
EP1512469A1 EP04447085A EP04447085A EP1512469A1 EP 1512469 A1 EP1512469 A1 EP 1512469A1 EP 04447085 A EP04447085 A EP 04447085A EP 04447085 A EP04447085 A EP 04447085A EP 1512469 A1 EP1512469 A1 EP 1512469A1
Authority
EP
European Patent Office
Prior art keywords
lubricant
installation according
box
diaphragm
strip
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP04447085A
Other languages
English (en)
French (fr)
Other versions
EP1512469B1 (de
Inventor
Guillaume Bourdon
Hugo Uijtdebroeks
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Centre de Recherches Metallurgiques CRM ASBL
Original Assignee
Centre de Recherches Metallurgiques CRM ASBL
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Publication date
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Publication of EP1512469A1 publication Critical patent/EP1512469A1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/0012—Apparatus for achieving spraying before discharge from the apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
    • B05B7/0416—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
    • B05B7/0441—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid with one inner conduit of liquid surrounded by an external conduit of gas upstream the mixing chamber
    • B05B7/045—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid with one inner conduit of liquid surrounded by an external conduit of gas upstream the mixing chamber the gas and liquid flows being parallel just upstream the mixing chamber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/06—Lubricating, cooling or heating rolls
    • B21B27/10—Lubricating, cooling or heating rolls externally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0233—Spray nozzles, Nozzle headers; Spray systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0239—Lubricating
    • B21B45/0245—Lubricating devices
    • B21B45/0248—Lubricating devices using liquid lubricants, e.g. for sections, for tubes
    • B21B45/0251—Lubricating devices using liquid lubricants, e.g. for sections, for tubes for strips, sheets, or plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
    • B05B7/0416—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
    • B05B7/0441—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid with one inner conduit of liquid surrounded by an external conduit of gas upstream the mixing chamber

Definitions

  • the present invention relates to a new cylinder lubrication system of a rolling line, preferably a rolling line to hot.
  • the invention also relates to the method implemented on the installation.
  • thermomechanical path well determined (reduction, temperature) which is influenced by the friction between the work rolls and the band in the gap between the rollers. It is well known that this thermomechanical path has a major influence on the tape quality (surface appearance and properties Metallurgical).
  • Friction is mainly influenced by the evolution of the surface of the roll and by the film of scale formed on the surface of the rollers and the strip.
  • the coefficient of friction changes during a rolling campaign, a deterioration of the surface of the rolls (banding, peeling) accompanied by a increase in this coefficient of friction.
  • Friction is also influenced by the nature of the rolls, the new HSS rollers being characterized by higher coefficients of friction.
  • cylinder lubrication rolling mill is produced by spraying an emulsion, which is a suspension of oil droplets in the water, without mixing of oil and water, with a concentration in oil typically ranging between 0.3 and 2%. he can either a stable emulsion or an emulsion unstable prepared online.
  • the emulsion is applied directly on the work rolls by means of a spray device located after the squeegees in the purpose of applying the oil on a dry surface.
  • This mode application ensures a better distribution of the oil and therefore contributes to the reduction of the oil consumption.
  • lubrication leads to a improvement of the metallurgical properties of the product, especially when the finishing lamination takes place at low temperature in the ferritic field.
  • the level of required quality therefore requires very little lubrication performance.
  • the level of coefficient of friction that should be achieved to obtain optimization of the mechanical properties of the product should to be close to 0.10, which is well below current performance.
  • the coefficient of friction depends on many factors such that the application technology used, the quantity of oil, the nature of the oil, the speed of flow and the concentration of the oil emulsion, the temperature of the surface of the tape, the nature and condition of the rollers (roughness, degradation, scale, etc.), the speed of rolling, reduction, etc.
  • the effectiveness of lubrication can be very different from a train to the other and from one cage to another in the same train.
  • the lubrication efficiency is a function of the rolling temperature, the nature of the lubricant (mineral, ester-based, etc.) and the amount thereof. Satisfactory results are obtained by spraying oil in surface densities ("plate-out") of 0.1 to 1 g / m 2 , which is significantly more than is required simply to control the degradation of the rollers .
  • the system of spraying the oil emulsion is either a venturi, the aspiration of the oil being carried out by the depression created by moving water in the main tube, a static mixer ("static tube mixer") where one oil injection into a tube area where the shear (velocity gradient) is increased thanks to the presence of "obstacles".
  • the venturi or the "static tube mixer” is combined with a series of injectors whose number is selected based on the bandwidth at lubricate (3 to 7 injectors for a band up to 2 meters wide).
  • EP-A-1,193,004 discloses a method of lubrication system for cold rolling comprising steps of: supplying a rolling oil emulsion using a first device for supplying the oil in the form of an emulsion supplied to a cylinder and a steel strip according to a recirculation mode and a second device for supplying the emulsion only on the front and back surfaces of the steel strip.
  • the rolling oil is added to an emulsifier of the same type and concentration as those used for the first device, with a control of average size of particles so that they are more large than in the first device.
  • the emulsion produced by the second device not adhered to the band is recovered at the same time as the emulsion produced by the first device.
  • US-A-3,933,660 proposes an oil lubricating reducer for hot rolling of copper and its alloys comprising 1000 parts by weight of water, 6 to 200 parts by weight of anionic surface activator of type carboxylic acid, sulfate or phosphate and 0.8 to 200 parts by weight of at least one compound containing a hydroxyl group of alcohol type, alkylene glycol or ether glycol.
  • Rolling oil provides copper and its alloys a lubrication, an ability to remove a oxide film and an ability to prevent the formation of a oxide film by spraying between the cylinder of rolling and the hot rolling strip.
  • JP-A-55 151 093 describes a process lubrication in cold rolling of a covered strip by a polar organic compound which is sprayed with a emulsion of oil and a composition comprising a compound polar organic such as stearic acid.
  • the emulsion excess oil is removed by spinning after formation of an adsorbed oil layer on the surface of the bandaged.
  • the present invention aims to provide a solution that overcomes the disadvantages of the state of technique such as the inability to control and control the concentration and stability of the emulsion oil-water, clogging of the intake pipes of the emulsion by formation of solid organic residues, the influence of the specific flow rate, etc.
  • the object of the invention is in particular to propose a new process of lubricating the cylinders of rolling to maintain constant or in any case under control the friction on an industrial scale.
  • the invention also aims to increase the effectiveness of the attachment of the lubricating oil on the cylinders.
  • the invention also aims to increase the homogenisation of the distribution of the oil on the cylinders.
  • said lubricant possesses a purity of at least 95% and a boiling temperature greater than 130 ° C, and preferably a temperature boiling above 300 ° C and a flash point greater than 180 ° C. This requirement therefore excludes water as lubricant as well as oil emulsions in the water. At the limit, traces of water present in the lubricant, within its purity, may to be tolerated.
  • the installation of the invention is provided with means of controlling the temperature of the box, preferably comprising an electrical resistance or a water circuit. Temperature control provides a better controllability of the process in general and in particular reduces the problems related to the viscosity of the lubricant.
  • said temperature control means are associated to the use of a solid lubricant at temperature ambient and liquid at a working temperature of installation above room temperature.
  • said means of formation of a cloud of droplets comprises at least one nozzle or injector without air, preferably a jet of full cone type, or an internal mixing atomizer or external lubricant suspended in air or gas inert or an ultrasonic atomizer.
  • the installation comprises a plurality of nozzles or injectors or atomizers distributed the width of the rolling line, some of which can be made non-operational to adapt to the effective width of the band and / or quantity surface of lubricant to be deposited.
  • the installation comprises means for cutting said sprinklers, ie one out of two, either randomly.
  • the box is subdivided into at least two parts, each part comprising a diaphragm and an associated device for recovering lubricant.
  • the excess lubricant recovery device and / or the diaphragm (s) is (are) made of a material pierced with a plurality of holes or in a porous material.
  • the lubricant recovery device surplus includes a closed circuit for the circulation of lubricant with pumping equipment and possibly lubricant recycling.
  • An additional feature of the invention is that the spray angle, the opening the diaphragm (s) and their number on the face front of the box, as well as possibly the dimensions of the box, are chosen according to the width of the cylinders and / or the tape to be lubricated and the speed of the band.
  • the installation of the invention comprises means for increasing the opening of the diaphragm (s) with the scroll speed of the band, which is also equal to the tangential speed cylinders.
  • the internal walls of the box are made of a material allowing suction of the lubricant.
  • the band scrolls at a speed ranging from 0.5 to 20 m / s.
  • the opening of the diaphragm or diaphragms is adjusted to deposit on the target a surface amount ("plate-out") of lubricant of between 0.01 and 1 g / m 2 .
  • the injection parameters of lubricant are regulated in open or closed loop.
  • Figure 1 schematically represents a nozzle for atomizing oil in the air, mixing internal, according to the state of the art.
  • Figure 2 schematically represents a first preferred embodiment of this invention.
  • Figure 3 schematically represents a second preferred embodiment of this invention.
  • Figure 4 schematically represents a third preferred embodiment of this invention.
  • the idea behind the present invention is combined use in a lubrication device a means for spraying fine droplets of lubricant and a diaphragm equipped with a oil recovery.
  • the The present invention relates more specifically to a spray lubrication system comprising a sprayer (or vaporizer) 1 of pure lubricant or a mixture of lubricants such as lubricants-based carbon, silicone or even molybdenum disulfide.
  • a sprayer or vaporizer
  • This or these lubricants have a degree of impurities or usual additives for products of this type commercially available (eg maximum 5%).
  • the spraying is carried out in the presence air.
  • Lubricants will be chosen as part of the present invention so as to have a temperature boiling above 130 ° C.
  • the function of the spray box 1 is to confine the atmosphere created by the fog of spray.
  • spray means either a spray or a spray atomisation, ie the reduction of the lubricant, at starting in the liquid state, in fine droplets, respectively in the presence or absence of air under pressure, leading to a droplet size ranging from a few microns to several millimeters, for example 2 mm, depending on the particular technology employed.
  • FIG. 1 shows an atomizer oil / air with internal mixing known in the state of the and can advantageously serve as a means of Spray 10 according to the present invention.
  • the air 12 is injected according to a ring 12 'surrounding the flow of oil 11, which makes it possible to obtain a conical cloud 20 atomization.
  • the cloud of droplets is formed by the shock occurring between the oil from the oil nozzle 11 and the air (or a gas inert) injected 12, the oil being dispersed in the air just before the release of the oil from the atomizer.
  • the oil flow is adjustable by changing the pressure of oil, the air pressure can be adjusted separately.
  • Figure 2 shows a sprayer according to a first preferred embodiment of the invention, comprising a only diaphragm 3, while figure 3 shows a sprayer according to a second preferred mode of the invention, comprising two diaphragms 3,3 '.
  • the internal side walls of the box may be covered with a common material 5 or alternatively a material allowing the suction of the lubricant, as shown in Figure 4.
  • the excess oil or lubricant, located on the inner walls and on the diaphragm, is sucked outside, recycled and reintroduced into the lubrication device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Nozzles (AREA)
EP04447085A 2003-09-08 2004-04-02 Verfahren und Vorrichtung zur Schmierung von Walzwerkswalzen Expired - Lifetime EP1512469B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE200300480 2003-09-08
BE2003/0480A BE1015673A3 (fr) 2003-09-08 2003-09-08 Procede et installation pour la lubrification de cylindres de laminage.

Publications (2)

Publication Number Publication Date
EP1512469A1 true EP1512469A1 (de) 2005-03-09
EP1512469B1 EP1512469B1 (de) 2008-04-02

Family

ID=34120393

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04447085A Expired - Lifetime EP1512469B1 (de) 2003-09-08 2004-04-02 Verfahren und Vorrichtung zur Schmierung von Walzwerkswalzen

Country Status (5)

Country Link
EP (1) EP1512469B1 (de)
AT (1) ATE390963T1 (de)
BE (1) BE1015673A3 (de)
DE (1) DE602004012810T2 (de)
ES (1) ES2301960T3 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009046505A1 (fr) * 2007-10-08 2009-04-16 Centre De Recherches Metallurgiques Asbl - Centrum Voor Research In De Metallurgie Vzw Installation et procede de lubrification par atomisation pour cylindres de laminage

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018117405A1 (de) 2018-07-18 2020-01-23 Kme Mansfeld Gmbh Verfahren zum Entzundern eines Kupferausgangsmaterials für ein Fertigen eines Kupferproduktes und Kupferprodukt

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2019689A1 (de) * 1970-04-23 1971-11-11 Schmid Rudolf Josef Rekord-Duesen-Heizbalken
DE2063878A1 (en) * 1970-12-24 1972-08-31 Schmid, Rudolf Josef, 2800 Bremen Roll stand sprayer - using several nozzle units mounted on a common support to spray steam-heated air/oil mixture
EP0060374A2 (de) * 1981-03-13 1982-09-22 VOEST-ALPINE Aktiengesellschaft Vorrichtung zum Einölen band- oder tafelförmiger Bleche
JPS60223603A (ja) * 1984-04-19 1985-11-08 Sumitomo Metal Ind Ltd 薄鋼帯の冷間圧延方法
WO1988009230A1 (en) * 1987-05-28 1988-12-01 Edwards William J Coolant flow control
EP0369007A1 (de) * 1987-03-10 1990-05-23 Nippon Kokan Kabushiki Kaisha Schmierungsverfahren für das heisslaminieren von stahl mit hohem siliziumgehalt
EP1193004A1 (de) * 2000-03-09 2002-04-03 Nkk Corporation Walzölversorgungsverfahren zum kaltwalzen

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2019689A1 (de) * 1970-04-23 1971-11-11 Schmid Rudolf Josef Rekord-Duesen-Heizbalken
DE2063878A1 (en) * 1970-12-24 1972-08-31 Schmid, Rudolf Josef, 2800 Bremen Roll stand sprayer - using several nozzle units mounted on a common support to spray steam-heated air/oil mixture
EP0060374A2 (de) * 1981-03-13 1982-09-22 VOEST-ALPINE Aktiengesellschaft Vorrichtung zum Einölen band- oder tafelförmiger Bleche
JPS60223603A (ja) * 1984-04-19 1985-11-08 Sumitomo Metal Ind Ltd 薄鋼帯の冷間圧延方法
EP0369007A1 (de) * 1987-03-10 1990-05-23 Nippon Kokan Kabushiki Kaisha Schmierungsverfahren für das heisslaminieren von stahl mit hohem siliziumgehalt
WO1988009230A1 (en) * 1987-05-28 1988-12-01 Edwards William J Coolant flow control
EP1193004A1 (de) * 2000-03-09 2002-04-03 Nkk Corporation Walzölversorgungsverfahren zum kaltwalzen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 010, no. 083 (M - 466) 2 April 1986 (1986-04-02) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009046505A1 (fr) * 2007-10-08 2009-04-16 Centre De Recherches Metallurgiques Asbl - Centrum Voor Research In De Metallurgie Vzw Installation et procede de lubrification par atomisation pour cylindres de laminage
BE1017806A3 (fr) * 2007-10-08 2009-07-07 Ct Rech Metallurgiques Asbl Installation et procede de lubrification par atomisation pour cylindres de laminage.
US8544608B2 (en) 2007-10-08 2013-10-01 Centre De Recherches Metallurgiques Asbl Spray lubrication unit and method for rolling cylinders

Also Published As

Publication number Publication date
ATE390963T1 (de) 2008-04-15
BE1015673A3 (fr) 2005-07-05
DE602004012810T2 (de) 2009-04-09
EP1512469B1 (de) 2008-04-02
ES2301960T3 (es) 2008-07-01
DE602004012810D1 (de) 2008-05-15

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