EP0240825A2 - Schmierstoffsystem für Blech- und Profilwalzwerke - Google Patents
Schmierstoffsystem für Blech- und Profilwalzwerke Download PDFInfo
- Publication number
- EP0240825A2 EP0240825A2 EP87104244A EP87104244A EP0240825A2 EP 0240825 A2 EP0240825 A2 EP 0240825A2 EP 87104244 A EP87104244 A EP 87104244A EP 87104244 A EP87104244 A EP 87104244A EP 0240825 A2 EP0240825 A2 EP 0240825A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- component
- lubricant system
- weight
- lubricant
- carrier medium
- 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.)
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- C10M173/00—Lubricating compositions containing more than 10% water
- C10M173/02—Lubricating compositions containing more than 10% water not containing mineral or fatty oils
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- C10M103/00—Lubricating compositions characterised by the base-material being an inorganic material
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- C10M107/00—Lubricating compositions characterised by the base-material being a macromolecular compound
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- C10M111/00—Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential
- C10M111/04—Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential at least one of them being a macromolecular organic compound
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- C10M125/00—Lubricating compositions characterised by the additive being an inorganic material
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- C10M2201/0433—Sulfur; Selenenium; Tellurium used as base material
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2217/00—Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2217/02—Macromolecular compounds obtained from nitrogen containing monomers by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2217/024—Macromolecular compounds obtained from nitrogen containing monomers by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to an amido or imido group
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2217/00—Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2217/02—Macromolecular compounds obtained from nitrogen containing monomers by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2217/028—Macromolecular compounds obtained from nitrogen containing monomers by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a nitrogen-containing hetero ring
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2217/00—Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2217/04—Macromolecular compounds from nitrogen-containing monomers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2217/044—Polyamides
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2217/00—Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2217/04—Macromolecular compounds from nitrogen-containing monomers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2217/045—Polyureas; Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2217/00—Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2217/06—Macromolecular compounds obtained by functionalisation op polymers with a nitrogen containing compound
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2050/00—Form in which the lubricant is applied to the material being lubricated
- C10N2050/01—Emulsions, colloids, or micelles
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2050/00—Form in which the lubricant is applied to the material being lubricated
- C10N2050/015—Dispersions of solid lubricants
- C10N2050/02—Dispersions of solid lubricants dissolved or suspended in a carrier which subsequently evaporates to leave a lubricant coating
Definitions
- the invention relates to a lubricant system for sheet metal and profile rolling mills.
- the alkylene polymer burns and the resulting gases are able to act as separators.
- the remaining graphite can absorb current and local load peaks and generally acts as a dry lubricant.
- the attempt to transfer the lubricant mentioned specifically to the sheet metal and profile rolling processes failed.
- the known lubricants could no longer suffice.
- the object of the invention was to provide a lubricant system which is easy to use and leaves behind a lubricant in the form of a film which ensures perfect lubrication between sheets and profiles and the rolls of a rolling mill.
- a lubricant system for sheet metal and profile rolling mills which is a lubricating component a) from the series of solid lubricants and at least one of components b) and c), the components b) an adhesive component from the series of organic water-insoluble adhesives which disintegrate at temperatures up to 300 ° C. and have a softening point of 20 to 180 ° C., and c) a thickener for aqueous suspensions from the series of alginates, celluloses, starches, gums, clays, alone or in a mixture with one another, and a component d) in the form of a liquid, as a carrier medium.
- the lubricant system is used in sheet metal and profile rolling mills, with the slabs usually being fed to mechanical descaling from a pusher furnace in a highly heated state. Immediately thereafter, the slabs run, for example, into a continuous finishing series with usually 6 to 7 roll stands. The rolled sheet or profile is then cooled and wound up.
- a roll stand essentially consists of two opposing working cylinders, the sheet or profile being guided through the roll gap.
- the slabs have a temperature of approx. 1200 ° C when they enter the first mill stand and the sheet or profile formed from it still has a temperature of around 1000 ° C in the third stand. Therefore, the rolling cylinders have to be cooled with considerable amounts of water.
- a lubricant system which contains 25 to 95% by weight of component a) and 5 to 75% by weight of components b) and c) and with d) a suspension containing a), b) and c) from 5 to 30% by weight in d).
- the substances belonging to component a) include solid lubricants, expediently from the series graphite, MoS2, CaF2 and BN. Mixtures of these can optionally also be used. Synthetic graphite with a grain size of less than 100 micrometers is preferably used.
- Component b) includes substances from the range of organic, water-insoluble, optionally water-swellable adhesives which disintegrate at temperatures up to 300 ° C. and have a softening point of 20 to 180 ° C.
- useful hydrocarbon resins from the series include coumarone indene resins with a softening point of 105 to 145 ° C., aliphatic and / or aromatic petroleum resin mixtures with 4 to 10 carbon atoms in the base molecules, terpene resins, rosin derivatives, polyisobutylene, Polyamide resins with an average molecular weight of 6000 to 9000, and mixtures thereof.
- Adhesive components made from hydrocarbon resins are, for example, thermoplastic resins made from aromatic petroleum cuts.
- the polyamide resins with a molecular weight of 6000-9000 and with adhesive properties include the reactive polyamide resins. Furthermore, rosin and the derivatives of polymerized rosin or modified esters of rosin can be added to component b). Mixtures of the compounds mentioned can optionally also be used. In the context of the present invention, bitumen, such as Grahamite and Gilsonite, must also be mentioned in the series of the adhesive components b). However, all the advantages cannot be achieved with this, in particular the transmission effect is absent.
- Component b) can also advantageously be a mixture of at least one of the compounds mentioned with paraffins or waxes. However, the paraffins or waxes should not amount to more than 50% by weight of the total amount of resin.
- Component c) comprises the series of thickeners used for the preparation of aqueous suspensions.
- compositions of lubricant systems contain 30 to 90% by weight, preferably 40 to 90% by weight, of component a).
- Components b) and c) should be 5 to 75% by weight of all three components a), b) and c) and can be from 0 to 75% by weight of component b) and 0 to 75% by weight of component c) consist.
- compositions contain 25 to 95% by weight of component a) and 5 to 75% by weight of component b).
- Such lubricant systems are characterized by the fact that the dry lubricant adheres quickly and safely to the roller surface.
- compositions contain 25 to 95% by weight of component a) and 5 to 75% by weight of component c).
- the high proportion of thickeners ensures that there is a stable, aqueous suspension and that good evaporation and adhesion of the dry lubricant on the rollers can be observed even after the carrier medium has evaporated. Excellent results can be achieved with a system containing 40 to 95% by weight of component a) and 5 to 60% by weight of component c).
- Component d) is the carrier medium for the components mentioned.
- Water can preferably be used as the carrier medium. Water volatilizes easily at the processing and application temperatures of the lubricant system without leaving or developing harmful fumes or decomposition products.
- a carrier medium is necessary in order to bring the various components into a processable, ie spreadable and preferably sprayable, form.
- a homogeneous suspension is produced using the carrier medium.
- the composition according to the invention also ensures homogeneity during the transport of the suspension to the processing site and after spraying. Already during the spraying and at the latest when the lubricant system hits the roller cylinders, the carrier medium evaporates at least partially, while the remaining components, still in homogeneous distribution, form a firmly adhering, now waterproof film.
- the organic components start to burn off and thus create a gas separation pad.
- the graphite particles are adhered to while the organic components are still present and are able to develop their lubricating effect evenly distributed.
- the graphite also remains fully retained in its lubricating properties after all organic components have been removed.
- water glass it can be advantageous to add up to 5% by weight of water glass to the lubricant system.
- the water glass on the one hand has a lubricating effect at high temperatures and on the other hand is a film former for the lubricants.
- the lubricant is advantageously admixed with amounts of 0.1 to 3% by weight of a bactericide or biocide.
- Suspension aids and surfactants are also not essential for the stability of the suspension and are sometimes also undesirable.
- the stability of the suspension is primarily aimed at by means of the viscosity using the thickeners.
- the lubricant system according to the present invention produces a transfer effect.
- the scaffolds following the scaffold lubricated with a lubricant according to the present invention also have considerable energy savings and wear reduction. This is done without lubricating the subsequent stands.
- the lubricants according to the invention can be produced in such a way that the individual components are premixed without the carrier medium. These components are usually in dry, powdered form, whereby the grain size of the powder can be predetermined and selected and mixed together according to the requirements. The dry powder mixture can then be easily packaged and transported. In the area of the rolling mill, the dry lubricant powder can be mixed in a suitable mixer with the carrier medium, usually water, to form the required lubricant system in the form of a stable, homogeneous suspension. This suspension remains stable over long periods of time and is then advantageously applied via spray nozzles at 20 to 150 bar and in quantities of 0.5 to 5 l / min. applied to the roller cylinders per spray nozzle.
- Another key feature was a reduction in the energy consumption of the roll stand by an average of 15% and a reduction in roller wear by 35%.
- the second stand still shows a 10% reduction in energy consumption and 8% reduced roller wear
- the 3rd stand still shows an 8% reduced energy consumption.
- Example 2 The procedure was as in Example 1; again a solid lubricant system with a solids content of 10% by weight was produced in an aqueous suspension, the solid lubricant 88% by weight graphite (grain size less than 100 micrometers) 1% by weight water glass and 11% by weight alkyl cellulose contained. This suspension was applied using 8 nozzles in an amount of 0.7 l / min. and nozzle sprayed onto the working cylinders of the 1st stand. The result is shown in the table.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Lubricants (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
- Die Erfindung betrifft ein Schmierstoffsystem für Blech- und Profilwalzwerke.
- Es ist aus den CH-PS 596 294 und 609 728 bekannt, Schmierstoffe, enthaltend Graphit, Alkylenpolymere oder -copolymere, Filmstabilisatoren und Suspensionshilfsmittel, für die Schmierung von Dornen in Walzstrassen für die Herstellung von nahtlosen Rohren anzuwenden. Die Schmierstoffe werden in Form einer wässrigen Suspension auf den heissen Dornen aufgesprüht, wobei das Wasser verdampft und ein Schmierfilm zurückbleibt, in dem die Graphitpartikel im Alkylenpolymer in gleichmässiger Verteilung vorliegen. Wird der Dorn im Walzgerüst in die Luppe eingeführt, bildet die Schmelze des Alkylenpolymeren einen hydrodynamischen Schmierfilm, während des Walzens brennt das Alkylenpolymer ab und die entstehenden Gase vermögen trennend zu wirken. Der zurückbleibende Graphit kann momentane und lokale Belastungsspitzen auffangen und wirkt generell als Trockenschmierstoff.
Der Versuch, den genannten Schmierstoff speziell auf die Blech- und Profilwalzverfahren zu übertragen,schlug fehl. In Anbetracht der wesentlich längeren zur Verfügung stehenden Zeit für das Auftragen der Schmierstoffsuspension, das Verdampfen des Trägermediums und das Ausbilden einer gleichmässig dicken, wasserfesten, schmierenden Schicht konnten die bekannten Schmierstoffe nicht mehr genügen. - Aufgabe der Erfindung war es, ein Schmierstoffsystem zur Verfügung zu stellen, das einfach anzuwenden ist und einen Schmierstoff in Form eines Filmes zurücklässt, der eine einwandfreie Schmierung zwischen Blechen und Profilen und den Walzen einer Walzstrasse gewährleistet.
- Erfindungsgemäß wird dies mit einem Schmierstoffsystem für Blech- und Profilwalzwerke, das eine schmierende Komponente
a) aus der Reihe der Festschmierstoffe und wenigstens eine der Komponenten b) und c) enthält, wobei die Komponenten
b) eine klebende Komponente aus der Reihe der organischen wasserunlöslichen Klebstoffe, die bei Temperaturen bis 300°C zerfallen und einen Erweichungspunkt von 20 bis 180°C aufweisen, und
c) ein Verdickungsmittel für wässrige Suspensionen aus der Reihe der Alginate, der Cellulosen, der Stärken, der Gummen, der Tone, allein oder im Gemisch untereinander, bedeuten, und
eine Komponente
d) in Form einer Flüssigkeit, als Trägermedium, enthält, erreicht. - Das Schmierstoffsystem wird in Blech- und Profilwalzwerken eingesetzt, wobei die Brammen beispielsweise aus einem Stossofen in hocherhitztem Zustand in der Regel einer mechanischen Entzunderung zugeführt werden. Unmittelbar daran laufen die Brammen beispielsweise in eine kontinuierliche Fertigstaffel mit üblicherweise 6 bis 7 Walzgerüsten. Das ausgewalzte Blech oder Profil wird dann gekühlt und aufgewickelt.
- Ein Walzgerüst besteht im wesentlichen aus zwei sich gegenüber liegenden Arbeitszylindern, wobei das Blech oder Profil durch den Walzenspalt geführt wird. Die Brammen weisen eine Temperatur von ca. 1200°C auf, wenn sie in das erste Walzgerüst eintreten und das daraus geformte Blech oder Profil hat immer noch eine Temperatur von rund 1000°C im 3. Gerüst. Deshalb müssen die Walzzylinder mit erheblichen Mengen Wasser gekühlt werden.
- Nach der Erfindung wird zweckmässig ein Schmierstoffsystem angewendet, das 25 bis 95 Gew.% der Komponente a) und 5 bis 75 Gew.% der Komponenten b) und c) enthält und mit d) eine Suspension mit einem Gehalt an a), b) und c) von 5 bis 30 Gew.% in d) bildet.
- Zu den der Komponente a) zugehörigen Stoffen gehören Festschmierstoffe, zweckmässig aus der Reihe Graphit, MoS₂, CaF₂ und BN. Gemische davon können gegebenenfalls auch angewendet werden. Vorzugsweise wird synthetischer Graphit mit einer Korngrösse von kleiner als 100 Mikrometer eingesetzt.
- Zur Komponente b) zählen Stoffe aus der Reihe der organischen, wasserunlöslichen, gegebenenfalls wasserquellbaren Klebstoffe, die bei Temperaturen bis 300°C zerfallen und einen Erweichungspunkt von 20 bis 180°C aufweisen.
Aus dieser Reihe sind als zweckmässig Kohlenwasserstoffharze aus der Reihe Cumaron-Inden-Harze mit einem Erweichungspunkt von 105 bis 145°C, aliphatische und/oder aromatische Petrolharzgemische mit 4 bis 10 C-Atomen in den Basis-Molekülen, Terpenharze, Kolophoniumderivate, Polyisobutylen, Polyamid-Harze mit einem mittleren Molekulargewicht von 6000 bis 9000, und Mischungen davon zu nennen.
Klebende Komponenten aus Kohlenwasserstoffharzen sind beispielsweise thermoplastische, aus aromatischen Erdölschnitten hergestellte Harze. - Zu den Polyamidharzen mit einem Molekulargewicht von 6000-9000 und mit klebenden Eigenschaften gehören die reaktiven Polyamidharze.
Ferner können zur Komponente b) Kolophonium, sowie die Derivate polymerisierten Kolophoniums oder modifizierter Ester des Kolophoniums zugezählt werden.
Mischungen aus den genannten Verbindungen können gegebenenfalls auch zur Anwendung gelangen.
Im Rahmen vorliegender Erfindung muss in der Reihe der klebenden Komponenten b) auch Bitumen, wie Grahamite und Gilsonite genannt werden. Alle Vorteile lassen sich damit aber nicht erreichen, insbesondere fehlt der Uebertragungseffekt.
Vorteilhaft kann die Komponente b) auch eine Mischung wenigstens einer der genannten Verbindungen mit Paraffinen oder Wachsen sein. Dabei sollen die Paraffine oder Wachse aber nicht mehr als 50 Gew.% der Gesamtharzmenge betragen. - Die Komponente c) umfasst die Reihe der Verdickungsmittel, wie sie für die Herstellung wässriger Suspensionen verwendet werden. Es können die Alginate, Cellulosen, wie Alkyl- und Hydroxyalkylcellulosen, Carboxymethylcellulosen, Hydroxyethylcellulosen und Hydroxypropylcellulosen, Gummen, wie Guar-Gummi, Agar-Gummi, Gummi-arabicum, Ghatti-Gummi, Karaya-Gummi, Tragacanth-Gummi, Karoben-Johannisbrot-Gummi, Tamarind-Gummi und Xanthan-Gummi, Pectine, Polyacrylamide, Polyacrylsäuren und deren Homologen, Polyethylenglykol, Polyethylenoxid, Polyvinylalkohol, Polyvinylacetat, Polyvinylpyrrolidon, Stärke und deren Modifikationen, Kleister, wie Stärke- und Cellulosekleister, Carrageen, Polysaccharide, Wasserglas, Tone, insbesondere die hochplastischen Tone, Montmorrillonit, Bentonit, Kaolin, modifizierter Montmorrillonit, Hectorit, Attapulgit und die Derivate genannter Stoffgruppen und Mischungen genannter Substanzen untereinander, wobei die Tone als anorganische Substanzen nicht mehr als 20 Gew.% der genannten Komponente c) ausmachen sollen, angewendet werden.
- Weitere zweckmässige Zusammensetzungen von Schmierstoffsystemen enthalten 30 bis 90 Gew.%, bevorzugt 40 bis 90 Gew.%, der Komponente a).
Die Komponenten b) und c) sollen 5 bis 75 Gew.% aller drei Komponenten a), b) und c) betragen und können aus 0 bis 75 Gew.% der Komponente b) und 0 bis 75 Gew.% der Komponente c) bestehen. - Bevorzugte Zusammensetzungen enthalten 25 bis 95 Gew.% der Komponente a) und 5 bis 75 Gew.% der Komponente b).
Derartige Schmierstoffsysteme weisen sich dadurch aus, dass der Trockenschmierstoff rasch und sicher auf der Walzenoberfläche haftet. - Weitere bevorzugte Zusammensetzungen enthalten 25 bis 95 Gew.% der Komponente a) und 5 bis 75 Gew.% der Komponente c). Mit dem hohen Anteil an Verdickungsmitteln wird erreicht, dass eine stabile, wässrige Suspension vorliegt und sich auch nach dem Verdampfen des Trägermediums eine gute Schichtbildung und Haftung des Trockenschmierstoffes auf den Walzen beobachten lässt. Ausgezeichnete Resultate können mit einem System erreicht werden, das 40 bis 95 Gew.% der Komponente a) und 5 bis 60 Gew.% der Komponente c) enthält.
- Die Komponente d) stellt das Trägermedium für die genannten Komponenten dar. Als Trägermedium kann bevorzugt Wasser angewendet werden. Wasser verflüchtigt sich leicht bei den Verarbeitungs- und Anwendungstemperaturen des Schmierstoffsystems, ohne schädliche Abgase oder Zersetzungsprodukte zu hinterlassen oder zu entwickeln.
Ein Trägermedium ist notwendig, um die verschiedenen Komponenten in eine verarbeitbare, d.h. aufstreichbare und bevorzugt aufsprühbare Form zu bringen. Mit Hilfe des Trägermediums wird eine homogene Suspension hergestellt. Auch während des Transportes der Suspension zum Verarbeitungsort und nach dem Versprühen wird durch die erfindungsgemässe Zusammensetzung die Homogenität gewahrt. Schon während des Versprühens und spätestens beim Auftreffen des Schmierstoffsystems auf den Walzzylindern verdampft das Trägermedium wenigstens teilweise, während die verbleibenden Komponenten, nach wie vor in homogener Verteilung, einen festhaftenden, nunmehr wasserfesten Film bilden. Sobald die Walzzylinder mit dem Blech oder Profil in Berührung kommen, beginnen die organischen Bestandteile abzubrennen und erzeugen so ein Gastrennpolster. Die Graphitteilchen werden, so lange noch organische Bestandteile vorliegen, klebend festgehalten und vermögen ihre schmierende Wirkung gleichmässig verteilt zu entfalten. Darüber hinaus bleibt der Graphit auch nach dem Abrennen aller organischen Bestandteile in seiner Schmierwirksamkeit voll erhalten. - Es kann vorteilhaft sein, dem Schmierstoffsystem bis zu 5 Gew.% Wasserglas zuzusetzen. Das Wasserglas hat einerseits eine schmierende Wirkung bei hohen Temperaturen und stellt andererseits einen Filmbildner für die Schmierstoffe dar.
- Um einem bakteriellen Angriff, insbesondere bei Anwesenheit von Stärke oder Kleistern, vorzubeugen, werden dem Schmierstoff vorteilhaft Mengen von 0,1 bis 3 Gew.% eines Bakterizides oder Biocids beigemischt.
- Suspensionshilfmittel und Tenside sind auch für die Suspensionsstabilität nicht zwingend und teilweise auch unerwünscht. Die Stabilität der Suspension wird in erster Linie über die Viskosität mit Hilfe der Verdickungsmittel angestrebt.
- Es ist davon auszugehen, dass sich der hydrodynamische Schmierfilm, wie er im Stand der Technik, beispielsweise in der CH-PS 596 294 beschrieben wird, bei vorliegender Anwendung nicht ausbilden kann, da die Verweilzeit des Schmierstoffes auf der Walzenoberfläche bis zur Verarbeitung des Bleches oder Profils zu kurz ist. Es wurde nun gefunden, dass die spezifischen Erfordernisse bezüglich des Schmierens und Trennens beim Blech- und Profilwalzen mit dem erfindungsgemässen Schmierstoff erfüllt werden.
- Darüberhinaus wurde festgestellt, dass sich mit dem Schmierstoffsystem nach vorliegender Erfindung ein Uebertragungseffekt einstellt. Dem mit einem Schmierstoff nach vorliegender Erfindung geschmierten Gerüst nachfolgenden Gerüste weisen ebenfalls erhebliche Energieeinsparungen und Verschleissverminderung auf. Dies, ohne dass die nachfolgenden Gerüste geschmiert werden.
- Die erfindungsgemässen Schmierstoffe können derart hergestellt werden, dass die einzelnen Komponenten, ohne das Trägermedium, vorgemischt werden. Diese Bestandteile liegen in der Regel in trockener, pulverisierter Form vor, wobei sich die Korngrösse der Pulver vorbestimmen und entsprechend den Erfordernissen auswählen und zusammenmischen lässt. Das trockene Pulvergemisch kann dann auch leicht verpackt und transportiert werden. Im Bereich des Walzwerkes kann das trockene Schmierstoffpulver in einem geeigneten Mischer mit dem Trägermedium, in der Regel Wasser, zum erforderlichen Schmierstoffsystem in Form einer stabilen homogenen Suspension vermischt und aufgeschlossen werden. Diese Suspension bleibt über lange Zeiträume stabil und wird dann vorteilhaft über Sprühdüsen bei 20 bis 150 bar und in Mengen von 0,5 bis 5 l/min. pro Sprühdüse auf die Walzzylinder aufgebracht.
- Durch trockenes Vormischen von
35 Gew.% Graphit (Korngrösse kleiner als 100 Mikrometer)
40 Gew.% Kohlenwasserstoffharz gemahlen, mit Erweichungspunkt von 100°C
10 Gew.% Stärkekleister
5 Gew.% Carboxymethylcellulose
10 Gew.% Bentonit
wurde ein Festschmierstoff hergestellt, der mit Wasser in einem Intensivmischer zu einem Festschmierstoffsystem mit 10Gew.% Feststoffgehalt suspendiert wurde.
Die Suspension wurde mit 60 bar über 8 Düsen mit jeweils 1,2 l/min. auf die beiden Arbeitszylinder des 1. Gerüstes einer Fertigstaffel innerhalb eines Blechwalzwerkes über die ganze Walzenbreite aufgesprüht.
Die gewalzten Bleche wiesen eine wesentlich verbesserte Qualität auf, die sich durch eine verbesserte Rauhigkeit, also eine hervorragende Oberflächenqualität, bemerkbar machte. Wesentliches Merkmal darüber hinaus war eine Verminderung der Energieaufnahme des Walzgerüstes um durchschnittlich 15% und eine Verminderung des Walzenverschleisses von 35%. Darüber hinaus konnte festgestellt werden, dass sich ein Uebertragungseffekt einstellte, so dass das 2. Gerüst noch eine um 10% verminderte Energieaufnahme und um 8% verminderten Walzenverschleiss und das 3. Gerüst immer noch eine 8% verminderte Energieaufnahme zeigt. - Es wurde wie in Beispiel 1 vorgegangen; wiederum wurde ein Festschmierstoffsystem mit 10 Gew.% Feststoffgehalt in einer wässrigen Suspension hergestellt, wobei der Festschmierstoff
88 Gew.% Graphit (Korngrösse kleiner als 100 Mikrometer)
1 Gew.% Wasserglas und
11 Gew.% Alkylcellulose
enthielt. Diese Suspension wurde mittels 8 Düsen in einer Menge von 0,7 l/min. und Düse auf die Arbeitszylinder des 1. Gerüstes aufgesprüht. Das Ergebnis ergibt sich auf der Tabelle. -
-
Claims (7)
b) eine klebende Komponente aus der Reihe der organischen wasserunlöslichen Klebstoffe, die bei Temperaturen bis 300°C zerfallen und einen Erweichungspunkt von 20 bis 180°C aufweisen, und
c) ein Verdickungsmittel für wässrige Suspensionen aus der Reihe der Alginate, der Cellulosen, der Stärken, der Gummen, der Tone, allein oder im Gemisch untereinander, bedeuten,und
eine Komponente
d) in Form einer Flüssigkeit, als Trägermedium, enthält, wobei die Komponente d) eine Suspension mit einem Gehalt an a), b) und c) von 5 bis 30 Gew.-% in d) bildet.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH1322/86 | 1986-04-04 | ||
CH1322/86A CH669129A5 (de) | 1986-04-04 | 1986-04-04 | Schmierstoffsystem fuer blech- und profilwalzwerke. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0240825A2 true EP0240825A2 (de) | 1987-10-14 |
EP0240825A3 EP0240825A3 (de) | 1988-08-24 |
Family
ID=4207732
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP87104244A Withdrawn EP0240825A3 (de) | 1986-04-04 | 1987-03-23 | Schmierstoffsystem für Blech- und Profilwalzwerke |
Country Status (11)
Country | Link |
---|---|
US (1) | US4808324A (de) |
EP (1) | EP0240825A3 (de) |
JP (1) | JPS62250099A (de) |
KR (1) | KR870010169A (de) |
CN (1) | CN87102555A (de) |
AU (1) | AU594754B2 (de) |
BR (1) | BR8701496A (de) |
CA (1) | CA1273002A (de) |
CH (1) | CH669129A5 (de) |
SU (1) | SU1574179A3 (de) |
ZA (1) | ZA872115B (de) |
Cited By (4)
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EP0554822A1 (de) * | 1992-02-06 | 1993-08-11 | Lonza Ag | Dornschmiermittel für die Herstellung nahtloser Rohre |
EP0611817A1 (de) * | 1991-09-13 | 1994-08-24 | Nihon Parkerizing Co., Ltd. | Schmiermittelzusammensetzung für heisse plastische Verarbeitung |
WO1997002334A1 (de) * | 1995-07-04 | 1997-01-23 | Timcal Ag | Schmiermittel für profilwalzen |
CN100408315C (zh) * | 2006-06-01 | 2008-08-06 | 鞍山市宏图防腐工程有限公司 | 车床型胶辊衬胶机及其衬胶方法 |
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JPH0637632B2 (ja) * | 1988-08-16 | 1994-05-18 | 新日鐵化学株式会社 | 高温用潤滑剤組成物 |
CA1329802C (en) * | 1988-08-30 | 1994-05-24 | Nippon Kokan Kabushiki Kaisha | Lubricant for the production of seamless steel pipes |
US5468401A (en) * | 1989-06-16 | 1995-11-21 | Chem-Trend, Incorporated | Carrier-free metalworking lubricant and method of making and using same |
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US5164433A (en) * | 1991-04-17 | 1992-11-17 | Rheox, Inc. | Rheological agents and thickeners |
US5294355A (en) * | 1992-12-28 | 1994-03-15 | Desilube Technology, Inc. | Thermally and oxidatively stable solid lubricants |
JP2586871B2 (ja) * | 1993-03-02 | 1997-03-05 | 協同油脂株式会社 | 油中分散型非黒鉛系潤滑油 |
US6303181B1 (en) | 1993-05-17 | 2001-10-16 | Electrochemicals Inc. | Direct metallization process employing a cationic conditioner and a binder |
US5725807A (en) * | 1993-05-17 | 1998-03-10 | Electrochemicals Inc. | Carbon containing composition for electroplating |
US5690805A (en) * | 1993-05-17 | 1997-11-25 | Electrochemicals Inc. | Direct metallization process |
US5476580A (en) * | 1993-05-17 | 1995-12-19 | Electrochemicals Inc. | Processes for preparing a non-conductive substrate for electroplating |
US6171468B1 (en) | 1993-05-17 | 2001-01-09 | Electrochemicals Inc. | Direct metallization process |
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US5503506A (en) * | 1993-06-24 | 1996-04-02 | Hughes Aircraft Company | High precision, high surface finish broaching tool |
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- 1987-03-23 EP EP87104244A patent/EP0240825A3/de not_active Withdrawn
- 1987-03-23 ZA ZA872115A patent/ZA872115B/xx unknown
- 1987-03-31 KR KR870003000A patent/KR870010169A/ko not_active Application Discontinuation
- 1987-03-31 US US07/032,010 patent/US4808324A/en not_active Expired - Lifetime
- 1987-04-01 SU SU874202387A patent/SU1574179A3/ru active
- 1987-04-01 CN CN198787102555A patent/CN87102555A/zh active Pending
- 1987-04-02 BR BR8701496A patent/BR8701496A/pt unknown
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0611817A1 (de) * | 1991-09-13 | 1994-08-24 | Nihon Parkerizing Co., Ltd. | Schmiermittelzusammensetzung für heisse plastische Verarbeitung |
EP0554822A1 (de) * | 1992-02-06 | 1993-08-11 | Lonza Ag | Dornschmiermittel für die Herstellung nahtloser Rohre |
WO1997002334A1 (de) * | 1995-07-04 | 1997-01-23 | Timcal Ag | Schmiermittel für profilwalzen |
CN100408315C (zh) * | 2006-06-01 | 2008-08-06 | 鞍山市宏图防腐工程有限公司 | 车床型胶辊衬胶机及其衬胶方法 |
Also Published As
Publication number | Publication date |
---|---|
AU7102087A (en) | 1987-10-08 |
SU1574179A3 (ru) | 1990-06-23 |
CN87102555A (zh) | 1987-10-14 |
ZA872115B (en) | 1987-11-25 |
CH669129A5 (de) | 1989-02-28 |
KR870010169A (ko) | 1987-11-30 |
CA1273002A (en) | 1990-08-21 |
EP0240825A3 (de) | 1988-08-24 |
AU594754B2 (en) | 1990-03-15 |
JPS62250099A (ja) | 1987-10-30 |
US4808324A (en) | 1989-02-28 |
BR8701496A (pt) | 1988-01-19 |
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