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EP1924369A1 - Method for lubricating and cooling rollers and metal strips on rolling in particular on cold rolling of metal strips - Google Patents

Method for lubricating and cooling rollers and metal strips on rolling in particular on cold rolling of metal strips

Info

Publication number
EP1924369A1
EP1924369A1 EP06791668A EP06791668A EP1924369A1 EP 1924369 A1 EP1924369 A1 EP 1924369A1 EP 06791668 A EP06791668 A EP 06791668A EP 06791668 A EP06791668 A EP 06791668A EP 1924369 A1 EP1924369 A1 EP 1924369A1
Authority
EP
European Patent Office
Prior art keywords
rolling
model
strip
rolled strip
lubricant
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
EP06791668A
Other languages
German (de)
French (fr)
Other versions
EP1924369B1 (en
Inventor
Hartmut Pawelski
Ludwig Weingarten
Friedhelm Gieseler
Peter Jollet
Hans-Peter Richter
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.)
SMS Siemag AG
Original Assignee
SMS Demag AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SMS Demag AG filed Critical SMS Demag AG
Publication of EP1924369A1 publication Critical patent/EP1924369A1/en
Application granted granted Critical
Publication of EP1924369B1 publication Critical patent/EP1924369B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
    • B21B37/30—Control of flatness or profile during rolling of strip, sheets or plates using roll camber control
    • B21B37/32—Control of flatness or profile during rolling of strip, sheets or plates using roll camber control by cooling, heating or lubricating the rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
    • B21B37/44—Control of flatness or profile during rolling of strip, sheets or plates using heating, lubricating or water-spray cooling of the product
    • 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
    • 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
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions
    • B21B37/24—Automatic variation of thickness according to a predetermined programme
    • B21B37/26—Automatic variation of thickness according to a predetermined programme for obtaining one strip having successive lengths of different constant thickness
    • 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
    • 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
    • B21B45/0218—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for strips, sheets, or plates
    • 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

Definitions

  • the invention relates to a method for lubricating and cooling of rolls and metal strip during rolling, especially during cold rolling, of metal strips, wherein at least on the inlet side, a lubricant and on the outlet side, a coolant is applied by spraying and wherein lubricating, cleaning and inerting substances or Gases (media) or their combination at the rolled strip bottom and on the rolled strip top and / or on the lower work roll or the upper work roll are supplied.
  • EP 0 367 967 B1 discloses such a method for cooling and lubricating rolls and rolling stock in cold rolling.
  • an oil / water emulsion containing oil phase is adjusted in a special emulsification according to partial tensile stresses in the rolled strip or in accordance with the gripping conditions between the roll and rolled strip and adjusted by a quantitative and type of use of the media to be emulsified.
  • the disadvantage is too high oil carrying with high water content and thus risk of rust on the finished steel strip or coating on the non-ferrous metal strip. Too high oil carrying means that residual oil remains on the metal strip, which must be removed by additional steps. If even environmental pollution by disposal occur, even higher production costs.
  • a cold rolling process of metallic rolling is also known, in which the rolling stock passes under room temperature for plastic deformation through the nip between counter-driven rollers, wherein in the region of the roll gap instead of cooling liquid inert gas is blown, which one below room temperature lying inert gas temperature, such as, for example, in liquid nitrogen, which is less than the rolling temperature.
  • the invention has for its object to achieve a higher production of high-quality metallic rolled strip by saving process steps, with better strip qualities by a more stable rolling process, in particular a friction adjustment in the nip, to be made possible.
  • a development of the invention consists in that the physical calculation model takes into account the following variables: the prediction and optimization,
  • Another embodiment provides that, during the rolling process, the following variables for the application of the liquid or gaseous lubricant and coolant are predefined on the basis of a regulation by the calculation model: - volume flow,
  • the advantages consist in, for example, a change in the mixing ratio of differently acting media, for example mixing of a substance with strongly nip friction-reducing action and a substance with little influence on the nip friction, however with high washing effect, can be made.
  • Another embodiment is provided to the effect that before the start of the rolling process data, such as. Walzkraft, strip tension, strip thickness u. Like. Be predefined in a stitch plan, which is processed in the computer program.
  • the invention is further embodied in that process data are used for specifying a control loop for strip thickness, rolling stock elongation, strip flatness, strip roughness and / or strip surface.
  • the above measures can also be applied during periods of variable rolling speed using the calculation model. In doing so, the setting of the desired strip surface (for example with regard to roughness or gloss and other quality features),
  • FIG. 1 is a block diagram of a cold rolling mill in conjunction with setting members that are operated on the basis of a model calculation (computer program),
  • FIG. 2 shows a block-type arrangement of the operating parameters or process data that is used for a physically based model calculation
  • FIG. 3 shows a block-by-block listing of the parameters used in the physics-based model calculation.
  • a rolling stand 1 for metal strips 2 (made of heavy or light metal of various alloys, for example) has upper and lower work rolls 3, 4 which are mounted between support rolls 5, 6 in chocks.
  • Fig. 1 shows a four-roll stand.
  • the described application is applicable to all types of rolling stands, such as a six-high rolling stand, a twenty-high rolling stand, a Duo stand, etc.).
  • the metal strip 2 is fed from a unwinding station 7 on an entrance side 7a to a winding station 8 on the Outlet side 8a out.
  • a pure lubricant 9 as a chemical composition
  • a coolant 10 is applied by spraying.
  • the lubricant 9 and the coolant 10 consist of lubricating, cleaning and inerting substances or gases and also form combinations thereof and are supplied to the rolled strip bottom 2a and to the rolled strip top 2b.
  • the lubricating active substances on the inlet side 7a form emulsions without high water content, emulsion base oils, rolling oils and / or additive concentrates.
  • the cleaning and inertizing substances consists of cryogenic inert gases, for example of nitrogen, and their combinations with other substances.
  • the device used for this purpose (FIG. 1) consists of flatness measuring devices 11a on the inlet side 7a and a flatness measuring device 11b on the outlet side 8a.
  • the speed of rolling rod 13 is measured with a speed gauge 12 and the forces acting with other measuring devices, so that the rolling strip quality 14, the properties of each metal produced, such as aluminum, steel, brass, copper u. Like., Can be determined.
  • the strip thickness 15 is measured continuously and over the width of the metal strip 2.
  • spray nozzle rows 16 for the supply of lubricant 9 in the targeted amount and distribution of a minimum lubrication 17.
  • such spray nozzle rows 16 for the lubrication of the upper and lower working rolls 3, 4 and the upper and lower support rolls 5, 6 are arranged.
  • upper spray nozzle rows 18 and lower spray nozzle rows 19 are provided for a nitrogen application 20 for cooling and inerting and, if appropriate, alternatively for lubricant 9 as a plot 21.
  • All substances for lubricating and cooling are determined in their variable quantity according to the computationally or empirically determined values of the model calculation of a computer model 22 and the corresponding signals are forwarded to the respective actuators in the actuators connected to the measuring devices.
  • the dependence of the lubricant quantity on the changing process parameters can be readjusted at short notice. In general, this results in a friction adjustment in the nip.
  • the minimal lubrication is characterized by the fact that only as much lubricant 9 is applied as is needed in the rolling process. This may be a so-called.
  • Base oil from various chemical substances a “Medium 1" for the minimum lubrication 17 can be mixed with a “Medium 2" of different type classes x, y to a “Medium n” until the required properties, such as viscosity and lubricity, for the minimum lubrication 17 is reached.
  • the process continues on the outlet side 8a on the basis of nitrogen deposition and application of alternative lubricants.
  • the package "1 in a circle” contains the tape speed from the speed measuring device 12 read from left to right, then the belt quality (eg tear resistance).
  • the strip tension 28 is determined from the flatness measuring device 11a.
  • the parameters of the rolling force 29 result from the roll diameter 30, the roll roughness 31, the roll material 32, the rolling torque 33, the roll temperature 34 and the thickness reduction 35 of the metal strip 2.
  • the analogous values are provided in the outlet side 8a.
  • Fig. 3 the individual considered, independent specifications for the computational model 22 are summarized: Thereafter, the process data 23 are obtained from physical variables, in the computational model 22 more sub-computer models (computer programs) are used.
  • the Stichplansley 36 is optimized by a basic model.
  • a tribological model 37 is used for the assessment of the lubricating film.
  • a temperature model 38 and the elastic deformations 39 of the rollers 3,4,5,6 are introduced according to previous findings.
  • a mechanical roll gap model 40 (computer program) is taken into account.
  • a model 41 for optimizing the surface quality is included the calculation model 22.
  • the friction adaptation to the rolling process 42 takes place taking into account the reduction rolling, during the temper rolling or during flexible rolling.
  • a hydrodynamic model 43 of the distribution of the lubricant 9 and a model (computer program) 44 for roughness (roll surface on the metal strip 2) are introduced.
  • specifications 45 for the rolling force 29 and the strip tension 28 are formed (left part of FIG. 3).
  • a prediction 48 and an optimization of the temperature development of the work rolls 3, 4 and of the metal strip 2 are to be formed in FIG. 3 (right part).
  • Lubricant determination 49 by type, viscosity and temperature must be specified.
  • strip surface quality optimization 50 and a choice of work roll roughness value should be introduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Lubricants (AREA)
  • Control Of Metal Rolling (AREA)

Abstract

The invention relates to a method for lubricating and cooling rollers (3,4,5,6) and metal strips (2) on rolling in particular, on cold rolling of metal strips (2), wherein, on the inlet side (7a) a minimal amount of pure lubricant (9) without a high water content is continuously supplied in an online controlled manner with a controlled viscosity and lubricity depending on a number of process data measurements (23) by means of a physical computer model (22) and the equivalent process data measurements (23) from the outlet side (8a) are also used online by the physical computer model (22).

Description

Verfahren zum Schmieren und Kühlen von Walzen und Metallband beim Walzen, insbesondere beim Kaltwalzen von MetallbändernMethod for lubricating and cooling rolls and metal strip during rolling, in particular during cold rolling of metal strips
Die Erfindung betrifft ein Verfahren zum Schmieren und Kühlen von Walzen und Metallband beim Walzen, insbesondere beim Kaltwalzen, von Metallbändern, wobei zumindest auf der Einlaufseite ein Schmiermittel und auf der Auslaufseite ein Kühlmittel durch Sprühen aufgetragen wird und wobei schmieraktive, reinigende und inertisierende Stoffe bzw. Gase ( Medien) oder deren Kombination an der Walzband-Unterseite und an der Walzband-Oberseite und / oder an der unteren Arbeitswalze bzw. der oberen Arbeitswalze zugeführt werden.The invention relates to a method for lubricating and cooling of rolls and metal strip during rolling, especially during cold rolling, of metal strips, wherein at least on the inlet side, a lubricant and on the outlet side, a coolant is applied by spraying and wherein lubricating, cleaning and inerting substances or Gases (media) or their combination at the rolled strip bottom and on the rolled strip top and / or on the lower work roll or the upper work roll are supplied.
Aus der EP 0 367 967 B1 ist ein solches Verfahren zum Kühlen und Schmieren von Walzen und Walzgut bei Kaltwalzen bekannt. Dabei wird eine Ölphase enthaltende Öl- / Wasser-Emulsion in einer speziellen Emulgiertechnik nach Maßgabe von partiellen Zugspannungen im Walzband bzw. nach Maßgabe der Greifbedingungen zwischen Walze und Walzband eingestellt und durch einen mengenmäßigen und typenmäßigen Einsatz der zu emulgierenden Medien eingeregelt. Der Nachteil ist ein zu hoher Ölauftrag mit hohem Wasseranteil und damit Rostgefahr auf dem fertigen Stahlband oder Belag auf dem NE- Metallband. Eine zu hohe Ölauftragung bedeutet, dass Rest-Ölmengen auf dem Metallband verbleiben, die durch zusätzliche Arbeitsschritte wieder entfernt werden müssen. Falls auch noch Umweltbelastungen durch Entsorgung auftreten, entstehen noch höhere Herstellungskosten.EP 0 367 967 B1 discloses such a method for cooling and lubricating rolls and rolling stock in cold rolling. In this case, an oil / water emulsion containing oil phase is adjusted in a special emulsification according to partial tensile stresses in the rolled strip or in accordance with the gripping conditions between the roll and rolled strip and adjusted by a quantitative and type of use of the media to be emulsified. The disadvantage is too high oil carrying with high water content and thus risk of rust on the finished steel strip or coating on the non-ferrous metal strip. Too high oil carrying means that residual oil remains on the metal strip, which must be removed by additional steps. If even environmental pollution by disposal occur, even higher production costs.
Aus der DE 199 53 230 C2 ist außerdem ein Kaltwalzverfahren von metalli- schem Walzgut bekannt, bei dem das Walzgut unter Raumtemperatur zur plastischen Formänderung durch den Walzspalt zwischen gegenläufig angetriebenen Walzen hindurch läuft, wobei in den Bereich des Walzspalts anstelle Kühlflüssigkeit Inertgas geblasen wird, welches eine unterhalb der Raumtemperatur liegende Inertgastemperatur, wie bspw. bei flüssigem Stickstoff, aufweist, die geringer ist als die Walzguttemperatur.From DE 199 53 230 C2, a cold rolling process of metallic rolling is also known, in which the rolling stock passes under room temperature for plastic deformation through the nip between counter-driven rollers, wherein in the region of the roll gap instead of cooling liquid inert gas is blown, which one below room temperature lying inert gas temperature, such as, for example, in liquid nitrogen, which is less than the rolling temperature.
Der Erfindung liegt die Aufgabe zugrunde, eine höhere Produktion von qualitativ hochwertigerem metallischen Walzband durch Einsparung von Prozessschritten zu erzielen, wobei bessere Bandqualitäten durch einen stabileren Walzprozess, insbesondere eine Reibungsanpassung im Walzspalt, ermöglicht werden sollen.The invention has for its object to achieve a higher production of high-quality metallic rolled strip by saving process steps, with better strip qualities by a more stable rolling process, in particular a friction adjustment in the nip, to be made possible.
Die gestellte Aufgabe wird erfindungsgemäß dadurch gelöst, dass auf der Einlaufseite eine Minimalmenge an reinem Schmiermittel ohne hohen Wasseranteil mit kontrollierter Viskosität in Abhängigkeit der nachstehenden Prozessdaten kontinuierlich online dosiert über ein physikalisches Rechenmodell (22) aufgetragen wird:This object is achieved in accordance with the invention in that a minimal amount of pure lubricant without a high water content with controlled viscosity is continuously metered online via a physical calculation model (22) as a function of the following process data on the inlet side:
- Walzband-Geschwindigkeit,- rolled strip speed,
- Walzband-Qualität, - Walzband-Planheit,- rolled strip quality, - rolled strip flatness,
- Walzband-Oberfläche (bspw. Walzband-Rauheit ; wird online gemessen),Rolled strip surface (for example rolled strip roughness, measured online),
- Walzband-Zug,- rolled strip train,
- Walzkraft (einschl. Biegekraft der Arbeits- und Zwischenwalzen)- rolling force (including bending force of the working and intermediate rolls)
- Arbeitswalzen-Durchmesser, - Arbeitswalzen-Rauigkeit,- work roll diameter, - work roll roughness,
- Walzenwerkstoff und dass die hierzu äquivalenten Prozessdaten auf der Auslaufseite über das physikalische Rechenmodell ebenfalls online eingesetzt werden.- Roll material and that the equivalent process data on the outlet side via the physical calculation model are also used online.
Die Vorteile sind eine bessere Bandqualität durch einen stabileren Walzprozess, insbesondere wird eine Reibungsanpassung im Walzspalt ermöglicht. Darüber hinaus ist vorteilhaft, dass eine spätere Ölentfernung nicht mehr notwendig ist und dadurch weitere Prozessschritte erspart werden. Die Minimalschmierung bedeutet, dass nur soviel Schmiermittel auf der Einlaufseite aufge- bracht wird als zum Erreichen der gewünschten Produktqualität notwendig ist. Außerdem entfallen Entsorgungs-Einrichtungen und deren Kosten für Öl- Emulsionen. In die online-Dosierung des Schmiermittels auf der Einlaufseite können kontinuierlich feste Prozessgrößen (bspw. Werkstoff, Bandbreite u. dgl.) und während des Stichs veränderliche Prozessgrößen ( bspw. Bandgeschwindigkeit, Walzkraft, Walzmoment, Voreilung, Bandzug, Bandzugverteilung über der Bandbreite, Bandtemperatur, Walzentemperatur, Banddicke und Dickenab- nähme), berücksichtigt werden. Ferner können auf der Auslaufseite unmittelbar Konservierungsmittel (Stoffe gegen Rost und Bandklebern) eingesetzt werden.The advantages are a better strip quality by a more stable rolling process, in particular, a friction adjustment in the nip is possible. In addition, it is advantageous that a subsequent oil removal is no longer necessary and thus further process steps are spared. Minimal lubrication means that only as much lubricant is applied to the inlet side as necessary to achieve the desired product quality. In addition, disposal facilities and their costs for oil Emulsions. In the online dosage of the lubricant on the inlet side can continuously fixed process variables (eg., Material, bandwidth and the like.) And during the sting variable process variables (eg belt speed, rolling force, rolling torque, overfeed, strip tension, strip tension distribution over the belt width, belt temperature , Roll temperature, strip thickness and thickness decrease). Furthermore, preservatives (substances against rust and tape adhesives) can be used directly on the outlet side.
Eine Weiterbildung der Erfindung besteht darin, dass das physikalische Rechenmodell folgende Größen berücksichtigt: - für eine Stichplangestaltung die Vorhersage und Optimierung,A development of the invention consists in that the physical calculation model takes into account the following variables: the prediction and optimization,
- eine Beurteilung des Schmierfilms über ein tribologisches Modell,an assessment of the lubricating film via a tribological model,
- ein Temperaturmodell,a temperature model,
- die elastische Deformation der Walzen,the elastic deformation of the rolls,
- ein mechanisches Walzspaltmodell, - ein Modell zur Optimierung der Oberflächenqualität,- a mechanical roll gap model, - a surface quality optimization model,
- eine Reibungsanpassung an den Walzprozess beim Reduzierwalzen oder beim Dressierwalzen oder beim flexiblen Walzen ( Erzeugen unterschiedlicher Banddicken)a friction adaptation to the rolling process during reduction rolling or temper rolling or during flexible rolling (producing different strip thicknesses)
- ein hydrodynamisches Modell - und ein Modell für die Rauheitsabprägung zwischen Metallband und Arbeitswalzen.- a hydrodynamic model - and a model for roughness stamping between metal strip and work rolls.
Diese Größen können genutzt werden, um daraus online mit einem physikalisch basierten Rechenmodell des Walzprozesses, das mechanische, thermische und tribologische Effekte einschließt, gezielt die Auftragung der Medien auf die Walzen in den Walzspalt und auf das Metallband einzustellen.These quantities can be used to adjust the application of the media to the rolls in the nip and on the metal strip online with a physically based mathematical model of the rolling process, which includes mechanical, thermal and tribological effects.
Eine andere Ausgestaltung sieht vor, dass während des Walzprozesses die nachstehenden variablen Stellgrößen zum Auftragen der flüssigen oder gas- förmigen Schmiermittel und Kühlmittel aufgrund einer Regelung durch das Rechenmodell vorgegeben werden: - Volumenfluss,Another embodiment provides that, during the rolling process, the following variables for the application of the liquid or gaseous lubricant and coolant are predefined on the basis of a regulation by the calculation model: - volume flow,
- Druck,- Print,
- Temperatur,- temperature,
- über die Walzbandbreite verschiedene Einstellungen,- different settings over the rolling bandwidth,
- ggf. für die Walzband-Unterseite und die Walzband-Oberseite verschiedene Einstellungen.- If necessary, different settings for the rolled strip underside and the rolled strip top side.
Die Vorteile bestehen außer der schnellen Anpassung der Stellgrößen für das Auftragen der Medien darin, dass bspw. auch eine Veränderung des Mischungsverhältnisses von unterschiedlich wirkenden Medien, bspw. Mischung eines Stoffes mit stark Walzspaltreibung senkender Wirkung und eines Stoffes mit geringem Einfluss auf die Walzspaltreibung, jedoch mit hoher Waschwirkung, vorgenommen werden kann.Apart from the rapid adaptation of the manipulated variables for the application of the media, the advantages consist in, for example, a change in the mixing ratio of differently acting media, for example mixing of a substance with strongly nip friction-reducing action and a substance with little influence on the nip friction, however with high washing effect, can be made.
Dabei ist weiter vorteilhaft, dass das Mischungsverhältnis von flüssigen und gasförmigen Medien entsprechend einem Computerprogramm des physikalisch basierten Modells verändert wird.It is further advantageous that the mixing ratio of liquid and gaseous media is changed according to a computer program of the physically based model.
Eine andere Ausgestaltung ist dahingehend vorgesehen, dass vor Beginn des Walzvorgangs Prozessdaten, wie bspw. Walzkraft, Bandzug, Banddicke u. dgl., in einem Stichplan vorgegeben werden, der in dem Computerprogramm verarbeitet wird.Another embodiment is provided to the effect that before the start of the rolling process data, such as. Walzkraft, strip tension, strip thickness u. Like. Be predefined in a stitch plan, which is processed in the computer program.
Die Erfindung ist ferner dadurch ausgestaltet, dass Prozessdaten für eine Vorgabe eines Regelkreises für Banddicke, Walzgut-Verlängerung, Bandplanheit, Bandrauheit und / oder Bandoberfläche eingesetzt werden.The invention is further embodied in that process data are used for specifying a control loop for strip thickness, rolling stock elongation, strip flatness, strip roughness and / or strip surface.
Eine Verbesserung ist außerdem dadurch gegeben, dass eine Vorhersage zur Optimierung der Temperaturentwicklung im Metallband und / oder in den Arbeitswalzen vorgegeben wird. Vorteilhaft ist auch, dass eine Schmiermittelauswahl nach Hersteller-Typ, Viskosität und Temperaturverhalten vorgenommen wird.An improvement is also given by the fact that a prediction for optimizing the temperature development in the metal strip and / or in the work rolls is specified. It is also advantageous that a lubricant selection is made according to manufacturer type, viscosity and temperature behavior.
Zur Qualitätsverbesserung des Metallbandes trägt sodann bei, dass eine Optimierung der Walzband-Oberfläche durch Wahl der Arbeitswalzen-Rauheit vor- genommen wird.To improve the quality of the metal strip then contributes that an optimization of the rolled strip surface by selecting the work roll roughness is made.
Die vorstehenden Maßnahmen können unter Nutzung des Rechenmodells auch während Abschnitten mit veränderlicher Walzgeschwindigkeit angewendet werden. Dabei werden - die Einstellung der gewünschten Bandoberfläche ( bspw. hinsichtlich Rauheit oder Glanz und anderer Qualitätsmerkmale),The above measures can also be applied during periods of variable rolling speed using the calculation model. In doing so, the setting of the desired strip surface (for example with regard to roughness or gloss and other quality features),
- die Einstellung der gewünschten Bandplanheit,the setting of the desired flatness,
- die Sicherstellung der Prozessstabilität ( Vermeiden eines Bandrisses) und- Ensuring process stability (avoiding a band break) and
- eine effektive Ausnutzung der Medien erzielt.- Achieved effective use of the media.
Für das sog. flexible Walzen (bspw. als Kaltwalzverfahren zur Erzielung unterschiedlicher Banddicken über der Bandlänge) wird berücksichtigt, dass sich bei konstanter Schmierung aufgrund der über der Bandlänge variablen Dickenab- nähme regelmäßig der Prozesszustand drastisch ändert. Die stark veränderliche Walzkraft kann ein Einstellen der gewünschten Bandplanheit nur bedingt zulassen. In den Phasen hoher Dickenabnahme ist daher die Einstellung einer kleineren Reibungszahl im Walzspalt sinnvoll, ggf. in Kombination mit einer Erhöhung der Bandzüge, um durch Senkung der Walzkraft diesen Effekt zumin- dest teilweise zu kompensieren. Dieser Vorgang kann unter Berücksichtigung der Abhängigkeit von den anderen Prozessparametern, wie vorstehend beschrieben, unter Nutzung des physikalisch basierten Rechenmodells (Computerprogramm) erfolgen.For so-called flexible rolling (for example as a cold rolling process to achieve different strip thicknesses over the strip length), it is taken into account that the state of the process changes drastically with constant lubrication due to the variable thickness reduction over the strip length. The highly variable rolling force can only conditionally permit adjustment of the desired strip flatness. In the phases of high reduction in thickness, therefore, it makes sense to set a smaller coefficient of friction in the roll gap, possibly in combination with an increase in the strip tension, in order to at least partially compensate for this effect by reducing the rolling force. This process can take place, taking into account the dependence on the other process parameters, as described above, using the physically based computing model (computer program).
In der Zeichnung sind Ausführungsbeispiele der Erfindung dargestellt, die nachfolgend näher erläutert werden. Es zeigen:In the drawings, embodiments of the invention are shown, which are explained in more detail below. Show it:
Fig. 1 ein Blockschaltbild eines Kaltwalzgerüstes in Verbindung mit Einstellorganen, die aufgrund einer Modellrechnung (Computerpro- gramm) betrieben werden,1 is a block diagram of a cold rolling mill in conjunction with setting members that are operated on the basis of a model calculation (computer program),
Fig. 2 eine blockschaltartige Anordnung der Betriebsparameter bzw. Prozessdaten, die für eine physikalisch basierte Modellrechnung eingesetzt wird undFIG. 2 shows a block-type arrangement of the operating parameters or process data that is used for a physically based model calculation and FIG
Fig. 3 eine blockschaltartige Auflistung der Parameter, die in der physi- kaiisch basierten Modellrechnung verwendet werden.3 shows a block-by-block listing of the parameters used in the physics-based model calculation.
(Die Fig. 1 und 3 schließen mit „2 im Kreis" und „3 im Kreis" aneinander an; die Fig. 2 und 3 schließen mit „1 im Kreis" entsprechend aneinander an).(Figures 1 and 3 are adjacent to each other with "2 in circle" and "3 in circle"; Figures 2 and 3 correspondingly connect to each other with "1 in circle").
Ein Walzgerüst 1 (Fig. 1 ) für Metallbänder 2 (bspw. aus Schwer- oder Leichtmetall verschiedener Legierungen) weist obere und untere Arbeitswalzen 3, 4 auf, die zwischen Stützwalzen 5, 6 in Einbaustücken gelagert sind. Fig. 1 zeigt ein Vier-Walzengerüst. Die beschriebene Anwendung ist auf alle Arten von Walzgerüsten anwendbar, wie bspw. ein Sechs-Walzengerüst, ein Zwanzig-Rollen- Gerüst ein Duo-Gerüst usw.) Das Metallband 2 wird von einer Abwickelstation 7 auf einer Einlaufseite 7a zu einer Aufwickelstation 8 auf der Auslaufseite 8a geführt. Auf der Einlaufseite 7a wird ein reines Schmiermittel 9 als chemische Komposition und auf der Auslaufseite 8a ein Kühlmittel 10 durch Sprühen aufgetragen. Das Schmiermittel 9 und das Kühlmittel 10 bestehen aus schmierak- tiven, reinigenden und inertisierenden Stoffen oder Gasen und bilden auch Kombinationen derselben und werden an der Walzband-Unterseite 2a und an der Walzband-Oberseite 2b zugeführt. Die schmieraktiven Substanzen an der Einlaufseite 7a bilden Emulsionen ohne hohe Wasseranteile, Emulsionsgrundöle, Walzöle und / oder Additivkonzentrate. Die reinigenden und inertisierenden Stoffe besteht aus tiefkalten Inertgasen, bspw. aus Stickstoff, und deren Kombinationen mit anderen Stoffen. Die hierfür eingesetzte Einrichtung (Fig. 1 ) besteht aus Planheitsmessgeräten 11a auf der Einlaufseite 7a und einem Planheitsmessgerät 11 b auf der Auslaufseite 8a.A rolling stand 1 (FIG. 1) for metal strips 2 (made of heavy or light metal of various alloys, for example) has upper and lower work rolls 3, 4 which are mounted between support rolls 5, 6 in chocks. Fig. 1 shows a four-roll stand. The described application is applicable to all types of rolling stands, such as a six-high rolling stand, a twenty-high rolling stand, a Duo stand, etc.). The metal strip 2 is fed from a unwinding station 7 on an entrance side 7a to a winding station 8 on the Outlet side 8a out. On the inlet side 7a, a pure lubricant 9 as a chemical composition and on the outlet side 8a, a coolant 10 is applied by spraying. The lubricant 9 and the coolant 10 consist of lubricating, cleaning and inerting substances or gases and also form combinations thereof and are supplied to the rolled strip bottom 2a and to the rolled strip top 2b. The lubricating active substances on the inlet side 7a form emulsions without high water content, emulsion base oils, rolling oils and / or additive concentrates. The cleaning and inertizing substances consists of cryogenic inert gases, for example of nitrogen, and their combinations with other substances. The device used for this purpose (FIG. 1) consists of flatness measuring devices 11a on the inlet side 7a and a flatness measuring device 11b on the outlet side 8a.
Während des Metallband-Durchlaufs wird mit einem Geschwindigkeitsmessgerät 12 die Walzband-Geschwindigkeit 13 und mit weiteren Messgeräten die wirkenden Kräfte gemessen, so dass die Walzband-Qualität 14, die den Eigenschaften des jeweils erzeugten Metalls, wie bspw. Aluminium, Stahl, Messing, Kupfer u. dgl. entspricht, ermittelt werden kann. Die Banddicke 15 wird fortlau- fend und über die Breite des Metallbandes 2 gemessen. An der Walzband- Unterseite 2a und an der Walzband-Oberseite 2b sind auf der Einlaufseite 7a Sprühdüsenreihen 16 für die Zufuhr von Schmiermittel 9 in der gezielten Menge und Verteilung einer Minimalschmierung 17 angeordnet. Im Walzgerüst 1 sind solche Sprühdüsenreihen 16 für die Schmierung der oberen und unteren Ar- beitswalzen 3, 4 und der oberen und unteren Stützwalzen 5, 6 angeordnet.During the metal band pass, the speed of rolling rod 13 is measured with a speed gauge 12 and the forces acting with other measuring devices, so that the rolling strip quality 14, the properties of each metal produced, such as aluminum, steel, brass, copper u. Like., Can be determined. The strip thickness 15 is measured continuously and over the width of the metal strip 2. On the rolled strip underside 2a and on the rolled strip top 2b are arranged on the inlet side 7a spray nozzle rows 16 for the supply of lubricant 9 in the targeted amount and distribution of a minimum lubrication 17. In the rolling stand 1, such spray nozzle rows 16 for the lubrication of the upper and lower working rolls 3, 4 and the upper and lower support rolls 5, 6 are arranged.
An der Auslaufseite 8a sind obere Sprühdüsenreihen 18 und untere Sprühdüsenreihen 19 für eine Stickstoffauftragung 20 zum Kühlen und inertisieren und ggf. alternativ für Schmiermittel 9 als Auftragung 21 vorgesehen.On the outlet side 8a upper spray nozzle rows 18 and lower spray nozzle rows 19 are provided for a nitrogen application 20 for cooling and inerting and, if appropriate, alternatively for lubricant 9 as a plot 21.
Alle Stoffe zum Schmieren und Kühlen werden gemäß den rechnerisch oder aus Erfahrung ermittelten Werten der Modellrechnung eines Rechenmodells 22 in ihrer variablen Menge bestimmt und die entsprechenden Signale an die jeweiligen Stellglieder in die an die Messgeräte angeschlossenen Stellgeräte wei- tergeleitet. Dadurch wird der Walzprozess, insbesondere der Kaltwalzprozess, durch Anpassung der Reibungsverhältnisse äußerst flexibel. Die Abhängigkeit der Schmiermittelmenge von den sich ändernden Prozessparametern kann kurzfristig neu eingestellt werden. Generell gelingt dadurch eine Reibungsanpassung im Walzspalt. Die Minimalschmierung zeichnet sich dadurch aus, dass nur soviel Schmiermittel 9 aufgetragen wird, wie im Walzprozess benötigt wird. Dabei kann ein sog. Grundöl aus verschiedenen chemischen Grundsubstanzen bestehen, ein „Medium 1" für die Minimalschmierung 17 kann mit einem „Medium 2" verschiedener Typenklassen x, y zu einem „Medium n" gemischt werden, bis die erforderlichen Eigenschaften, wie bspw. Viskosität und Schmierfähigkeit, für die Minimalschmierung 17 erreicht ist. Der Vorgang wird auf der Auslaufseite 8a auf der Grundlage der Stickstoff-Auftragung und der Auftragung alternativer Schmierstoffe fortgesetzt.All substances for lubricating and cooling are determined in their variable quantity according to the computationally or empirically determined values of the model calculation of a computer model 22 and the corresponding signals are forwarded to the respective actuators in the actuators connected to the measuring devices. This makes the rolling process, in particular the cold rolling process, extremely flexible by adjusting the friction conditions. The dependence of the lubricant quantity on the changing process parameters can be readjusted at short notice. In general, this results in a friction adjustment in the nip. The minimal lubrication is characterized by the fact that only as much lubricant 9 is applied as is needed in the rolling process. This may be a so-called. Base oil from various chemical substances a "Medium 1" for the minimum lubrication 17 can be mixed with a "Medium 2" of different type classes x, y to a "Medium n" until the required properties, such as viscosity and lubricity, for the minimum lubrication 17 is reached The process continues on the outlet side 8a on the basis of nitrogen deposition and application of alternative lubricants.
Gemäß Fig. 2 sind die hierfür geeigneten Prozessdaten 23 zusammengestellt: Das Paket „1 im Kreis" enthält von links nach rechts gelesen die Bandgeschwindigkeit aus dem Geschwindigkeitsmessgerät 12, sodann die Bandquali- tat (bspw. Reißfestigkeit).According to FIG. 2, the process data 23 suitable for this purpose are combined: The package "1 in a circle" contains the tape speed from the speed measuring device 12 read from left to right, then the belt quality (eg tear resistance).
Die Banddicke 15, die Bandbreite 24, aus dem Planheitsmessgerät 11a die Bandplanheit 25, die Bandoberfläche (Rauheit) 26, die Bandzugverteilung 27. Der Bandzug 28 wird aus dem Planheitsmessgerät 11a ermittelt.The strip thickness 15, the bandwidth 24, from the flatness measuring device 11a, the band flatness 25, the strip surface (roughness) 26, the strip tension distribution 27. The strip tension 28 is determined from the flatness measuring device 11a.
Die Parameter der Walzkraft 29 resultieren aus dem Walzendurchmesser 30, der Walzenrauheit 31 , dem Walzenwerkstoff 32, dem Walzmoment 33, der Walzentemperatur 34 und der Dickenreduktion 35 des Metallbandes 2. Die analogen Werte sind in der Auslaufseite 8a vorgesehen.The parameters of the rolling force 29 result from the roll diameter 30, the roll roughness 31, the roll material 32, the rolling torque 33, the roll temperature 34 and the thickness reduction 35 of the metal strip 2. The analogous values are provided in the outlet side 8a.
In Fig. 3 sind die berücksichtigten einzelnen, selbständigen Vorgaben für das Rechenmodell 22 zusammengestellt: Danach werden die Prozessdaten 23 aus physikalischen Größen gewonnen, wobei in das Rechenmodell 22 weitere Sub- Rechenmodelle (Computerprogramme) herangezogen werden.In Fig. 3, the individual considered, independent specifications for the computational model 22 are summarized: Thereafter, the process data 23 are obtained from physical variables, in the computational model 22 more sub-computer models (computer programs) are used.
Die Stichplangestaltung 36 wird durch ein Basismodell optimiert. Für die Beurteilung des Schmierfilms wird ein tribologisches Modell 37 herangezogen. Ein Temperaturmodell 38 sowie die elastische Deformationen 39 der Walzen 3,4,5,6 werden nach bisherigen Erkenntnissen eingebracht. Ebenso wird ein mechanisches Walzspaltmodell 40 (Computerprogramm) berücksichtigt. Weiterhin findet ein Modell 41 zur Optimierung der Oberflächenqualität Eingang in das Rechenmodell 22. Die Reibungsanpassung an den Walzprozess 42 erfolgt unter Berücksichtigung des Reduzierwalzens, beim Dressieren oder beim flexiblen Walzen. Ferner wird ein hydrodynamisches Modell 43 der Verteilung des Schmiermittels 9 und ein Modell (Computerprogramm) 44 für Rauheitsabprä- gung (der Walzenoberfläche auf dem Metallband 2) eingeführt.The Stichplangestaltung 36 is optimized by a basic model. For the assessment of the lubricating film, a tribological model 37 is used. A temperature model 38 and the elastic deformations 39 of the rollers 3,4,5,6 are introduced according to previous findings. Likewise, a mechanical roll gap model 40 (computer program) is taken into account. Furthermore, a model 41 for optimizing the surface quality is included the calculation model 22. The friction adaptation to the rolling process 42 takes place taking into account the reduction rolling, during the temper rolling or during flexible rolling. Furthermore, a hydrodynamic model 43 of the distribution of the lubricant 9 and a model (computer program) 44 for roughness (roll surface on the metal strip 2) are introduced.
Aus den vorgegebenen Parametern für das Rechenmodell 22 werden Vorgaben 45 für die Walzkraft 29 und den Bandzug 28 gebildet (linker Teil Fig. 3). Es findet eine individuelle Setzung 46 der Regelkreise für die Banddicke 15 und die Bandplanheit 25, und Bandoberfläche 26 bezüglich Rauheit, Glanz und anderen Oberflächenmerkmalen statt, sowie eine Stichplan-Optimierung 47 mit Reibungsanpassung an den individuellen Walzprozess statt.From the given parameters for the calculation model 22, specifications 45 for the rolling force 29 and the strip tension 28 are formed (left part of FIG. 3). There is an individual set 46 of loop control for strip thickness 15 and strip flatness 25, and strip surface 26 for roughness, gloss, and other surface features, as well as stitch plan optimization 47 with friction adjustment to the individual rolling process.
Für die Auslaufseite 8a ist in Fig. 3 ( rechter Teil) eine Vorhersage 48 und eine Optimierung der Temperaturentwicklung der Arbeitswalzen 3,4 und des Metall- bandes 2 zu bilden. Eine Schmiermittelbestimmung 49 nach Typ, Viskosität und Temperatur ist vorzugeben. Außerdem ist eine Optimierung 50 der Bandoberflächen-Qualität und eine Wahl des Wertes für die Arbeitswalzen-Rauheit einzuführen. For the outlet side 8a, a prediction 48 and an optimization of the temperature development of the work rolls 3, 4 and of the metal strip 2 are to be formed in FIG. 3 (right part). Lubricant determination 49 by type, viscosity and temperature must be specified. In addition, strip surface quality optimization 50 and a choice of work roll roughness value should be introduced.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
1 Walzgerüst1 rolling stand
2 Metallband 2a Walzband-Unterseite2 metal strip 2a rolled strip underside
2b Walzband-Oberseite2b rolled strip top
3 obere Arbeitswalze3 upper work roll
4 untere Arbeitswalze4 lower work roll
5 obere Stützwalze 6 untere Stützwalze5 upper support roller 6 lower support roller
7 Abwickelstation 7a Einlaufseite7 unwinding station 7a inlet side
8 Aufwickelstation 8a Auslaufseite 9 reines Schmiermittel8 Winding station 8a Outlet side 9 pure lubricant
10 Kühlmittel10 coolants
11a Planheitsmessgerät (Einlaufseite)11a flatness measuring device (inlet side)
11 b Planheitsmessgerät (Auslaufseite)11 b flatness measuring device (outlet side)
12 Geschwindigkeitsmessgerät 13 Walzband-Geschwindigkeit12 Speed measuring device 13 Rolling belt speed
14 Walzband-Qualität14 rolled strip quality
15 Banddicke15 strip thickness
16 Sprühdüsenreihe16 spray nozzles row
17 Menge, Zusammensetzung und Verteilung der Minimalschmierung 18 obere Sprühdüsenreihe (Stickstoffauftragung)17 Quantity, composition and distribution of minimum lubrication 18 upper spray nozzle row (nitrogen application)
19 untere Sprühdüsenreihe (Stickstoffauftragung)19 lower spray nozzle row (nitrogen application)
20 Stickstoffauftragung20 nitrogen application
21 Auftragung alternativer Schmierstoffe 22 Rechenmodell (Computerprogramm)21 Application of alternative lubricants 22 calculation model (computer program)
23 Prozessdaten23 process data
24 Bandbreite24 bandwidth
25 Bandplanheit25 band flatness
26 Bandoberfläche 27 Bandzugverteilung26 Band surface 27 Band tension distribution
28 Bandzug28 Bandzug
29 Walzkraft29 rolling force
30 Walzendurchmesser30 roll diameter
31 Walzenrauheit 32 Walzenwerkstoff31 Roll roughness 32 Roll material
33 Walzmoment33 rolling moment
34 Walzentemperatur34 roll temperature
35 Dickenreduktion35 Thickness reduction
36 Stichplangestaltung 37 tribologisches Modell (Computerprogramm)36 Stichplangestaltung 37 tribological model (computer program)
38 Temperaturmodell (Computerprogramm)38 temperature model (computer program)
39 elastische Deformation der Walze39 elastic deformation of the roller
40 mechanisches Walzspaltmodell (Computerprogramm)40 mechanical roll gap model (computer program)
41 Modell / Oberflächenqualität 42 Reibungsanpassung an den Walzprozess41 Model / surface quality 42 Friction adaptation to the rolling process
43 hydrodynamisches Modell (Computerprogramm)43 hydrodynamic model (computer program)
44 Modelle für Rauheitsabprägung44 models for roughness stamping
45 Vorgabe Walzkraft / Bandzug45 Specification rolling force / strip tension
46 Setzung der 1. Regel-Systemebene 47 Stichplan-Optimierung / Anpassung46 Setting the 1st rule system level 47 Stitch plan optimization / adaptation
48 Vorhersage d. Temperaturentwicklung48 forecast d. temperature development
49 Schmiermittelbestimmung49 Lubricant determination
50 Optimierung der Bandoberfläche / Arbeitswalzen-Rauheit 50 Optimization of belt surface / work roll roughness

Claims

Patentansprüche: claims:
1. Verfahren zum Schmieren und Kühlen von Walzen ( 3,4,5,6 ) und Metallband (2) beim Walzen, insbesondere beim Kaltwalzen, von Metallbändern (2), wobei zumindest auf der Einlaufseite (7a) ein Schmiermittel (9) und auf der Auslaufseite (8a) ein Kühlmittel (10) durch Sprühen aufgetragen wird und wobei schmieraktive, reinigende und inertisierende Stoffe bzw. Gase (Medien) oder deren Kombination an der Walzband- Unterseite (2a) und / oder an der Walzband-Oberseite (2b) und / oder an der unteren Arbeitswalze (4) bzw. an der oberen Arbeitswalze (3) zuge- führt werden, dadurch gekennzeichnet, dass auf der Einlaufseite (7a) eine Minimalmenge an reinem Schmiermittel (9) ohne hohen Wasseranteil mit kontrollierter Viskosität in Abhängigkeit der nachstehenden Prozessdaten (23) kontinuierlich online dosiert über ein physikalisches Rechenmodell (22) aufgetragen wird:1. A method for lubricating and cooling of rollers (3,4,5,6) and metal strip (2) during rolling, in particular during cold rolling, of metal strips (2), wherein at least on the inlet side (7a) a lubricant (9) and on the outlet side (8a), a coolant (10) is applied by spraying and wherein lubricating, cleaning and inerting substances or gases (media) or their combination on the rolled strip bottom (2a) and / or on the rolled strip top (2b ) and / or on the lower work roll (4) or on the upper work roll (3), characterized in that on the inlet side (7a) a minimum amount of pure lubricant (9) without high water content with controlled viscosity in Dependence of the following process data (23) is continuously measured online in a dosed manner using a physical calculation model (22):
- Walzband-Geschwindigkeit (13), - Walzband-Qualität (14),- rolled strip speed (13), - rolled strip quality (14),
- Walzband-Planheit (11 a,11 b),Rolled strip flatness (11a, 11b),
- Walzband-Oberfläche (26), - Walzband-Zug (28),- rolled strip surface (26), - rolled strip tensioner (28),
- Walzkraft (29)- rolling force (29)
- Arbeitswalzen-Durchmesser (30)- Work roll diameter (30)
- Arbeitswalzen-Rauhigkeit (31 )- Work roll roughness (31)
- Walzenwerkstoff (32) und dass die hierzu äquivalenten Prozessdaten (23) auf der Auslaufseite (8a) über das physikalische Rechenmodell (22) ebenfalls online eingesetzt werden. - Roll material (32) and that the equivalent process data (23) on the outlet side (8a) on the physical computing model (22) are also used online.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass das physikalische Rechenmodell (22) folgende Größen berücksichtigt: - für eine Stichplangestaltung die Vorhersage und Optimierung,2. The method according to claim 1, characterized in that the physical calculation model (22) takes into account the following variables: the prediction and optimization,
- eine Beurteilung des Schmierfilms über ein tribologisches Modell (37)an evaluation of the lubricating film by means of a tribological model (37)
- ein Temperaturmodell (38)a temperature model (38)
- die elastische Deformation der Walzen (3,4,5,6)- the elastic deformation of the rolls (3,4,5,6)
- ein mechanisches Walzspaltmodell (40) - ein Modell zur Optimierung der Oberflächenqualität (41 )- a mechanical roll gap model (40) - a surface quality optimization model (41)
- eine Reibungsanpassung (42) an den Walzprozess beim Reduzierwalzen oder beim Dressierwalzen oder beim flexiblen Walzen- A friction adjustment (42) to the rolling process in Reduzierwalzen or during temper rolling or flexible rolling
- ein hydrodynamisches Modell (43) - und ein Modell (44) für die Rauheitsabprägung zwischen Metallband (2) und Arbeitswalzen (3,4).- A hydrodynamic model (43) - and a model (44) for the roughness stamping between metal strip (2) and work rolls (3,4).
3. Verfahren nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, dass während des Walzprozesses die nachstehenden variablen Stellgrößen zum Auftragen der flüssigen oder gasförmigen Schmiermittel (9) und Kühlmittel (10) aufgrund einer Regelung durch das Rechenmodell (22) vorgegeben werden:3. The method according to claims 1 and 2, characterized in that during the rolling process, the following variable manipulated variables for applying the liquid or gaseous lubricant (9) and coolant (10) are predetermined due to a regulation by the calculation model (22):
- Volumenfluss- Volume flow
- Druck- Print
- Temperatur- temperature
- über die Walzbandbreite (24) verschiedene Einstellungen - ggf. für die Walzband-Unterseite (2a) und die Walzband-Oberseite (2b) verschiedene Einstellungen. - Different settings via the rolled strip width (24) - possibly different settings for the rolled strip underside (2a) and the rolled strip top side (2b).
4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das Mischungsverhältnis von flüssigen und gasförmigen Medien entsprechend einem Computerprogramm (22) des physikalisch basierten Modells verändert wird.4. The method according to any one of claims 1 to 3, characterized in that the mixing ratio of liquid and gaseous media is changed according to a computer program (22) of the physically based model.
5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass vor Beginn des Walzvorgangs Prozessdaten (23), wie bspw. Walzkraft (29), Bandzug (28), Banddicke (15) u. dgl., in einem Stichplan vorgegeben werden.5. The method according to any one of claims 1 to 4, characterized in that before the start of the rolling process data (23), such as. Walzkraft (29), strip tension (28), strip thickness (15) u. Like. Be specified in a stitch plan.
6. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass Prozessdaten (23) für eine Vorgabe eines Regelkreises für Banddicke, (15), Walzgut-Verlängerung, Bandplanheit (25), Bandrauheit und / oder Bandoberfläche (26) eingesetzt werden.6. The method according to any one of claims 1 to 5, characterized in that process data (23) for a specification of a control loop for strip thickness, (15), rolling stock extension, band flatness (25), tape roughness and / or belt surface (26) are used ,
7. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass eine Vorhersage (48) zur Optimierung der Temperaturentwicklung im Metallband (2) und / oder in den Arbeitswalzen (3,4) vorgegeben wird.7. The method according to any one of claims 1 to 6, characterized in that a prediction (48) for optimizing the temperature development in the metal strip (2) and / or in the work rolls (3,4) is specified.
8. Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass eine Schmiermittelauswahl nach Hersteller-Typ, Viskosität und Temperaturverhalten vorgenommen wird.8. The method according to any one of claims 1 to 7, characterized that a lubricant selection is made according to manufacturer type, viscosity and temperature behavior.
9. Verfahren nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass eine Optimierung (50) der Walzband-Oberfläche durch Wahl der Arbeitswalzen-Rauheit vorgenommen wird.9. The method according to any one of claims 1 to 8, characterized in that an optimization (50) of the rolled strip surface is made by selecting the work roll roughness.
10. Verfahren nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass die vorstehenden Maßnahmen unter Nutzung des Rechenmodells (22) auch während Abschnitten mit veränderlicher Walzgeschwindigkeit angewendet werden. 10. The method according to any one of claims 1 to 9, characterized in that the above measures are also applied during periods of variable rolling speed using the computer model (22).
EP06791668A 2005-09-02 2006-08-25 Method for lubricating and cooling rollers and metal strips on rolling in particular on cold rolling of metal strips Not-in-force EP1924369B1 (en)

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