EP1907145B1 - Coolant applying method - Google Patents
Coolant applying method Download PDFInfo
- Publication number
- EP1907145B1 EP1907145B1 EP06777383A EP06777383A EP1907145B1 EP 1907145 B1 EP1907145 B1 EP 1907145B1 EP 06777383 A EP06777383 A EP 06777383A EP 06777383 A EP06777383 A EP 06777383A EP 1907145 B1 EP1907145 B1 EP 1907145B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cooling
- coolant
- roll
- zones
- roll stand
- 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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Links
- 239000002826 coolant Substances 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000001816 cooling Methods 0.000 claims abstract description 92
- 238000004590 computer program Methods 0.000 claims 3
- 238000005259 measurement Methods 0.000 abstract description 3
- 238000005096 rolling process Methods 0.000 description 60
- 239000003921 oil Substances 0.000 description 7
- 239000007921 spray Substances 0.000 description 5
- 239000000839 emulsion Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000010731 rolling oil Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005097 cold rolling Methods 0.000 description 2
- 239000000110 cooling liquid Substances 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000013598 vector Substances 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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
- B21B37/44—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
- 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
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0035—Forging or pressing devices as units
- B21B15/005—Lubricating, cooling or heating means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B2001/221—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length by cold-rolling
-
- 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
- B21B2003/001—Aluminium or its alloys
-
- 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
- B21B2027/103—Lubricating, cooling or heating rolls externally cooling externally
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
- B21B38/02—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring flatness or profile of strips
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
- B21B38/06—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring tension or compression
-
- 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 applying a coolant to a rolling stock and / or to at least one work roll of a roll stand having a roll gap, wherein the rolled stock is rolled with the aid of the roll stand. Furthermore, the invention also relates to a rolling stand.
- coolant usually oil or oil emulsion
- oil or oil emulsion is used to cool the rolling stock and / or the rolls of a roll stand.
- the rolling gap of the roll stand is lubricated by oil or oil emulsion.
- the coolant can thus even or in extreme cases even serve exclusively as a lubricant.
- D3 discloses spray nozzles with which a cooling liquid is applied to the upper work roll of a rolling stand.
- the object of the invention is to apply a coolant to a rolling stock and / or to at least one work roll of a roll stand such that the most constant and stable cooling or lubricating conditions are ensured.
- This object is achieved by a method for applying a coolant to a rolling stock and / or at least one work roll of a roll stand having a roll gap, wherein the rolling stock is rolled with the aid of the roll stand, and wherein the amount of coolant to be applied as a function of effective in the roll gap Performance is determined, wherein the effective power in the nip of the performance of the at least one drive of the rolling mill, plus the output in the outlet run of the roll stand, less the power in the inlet run of the roll stand composed. In this way disturbing thickness influences are minimized and excessive belt or roller temperatures are avoided.
- the amount of coolant to be applied can be determined in proportion to the effective power in the nip.
- the flatness of the rolling stock can be determined over a plurality of zones in the width direction, wherein the coolant is applied as a function of the determined flatness distribution distributed over the plurality of zones on the rolling stock and / or on the at least one work roll.
- the coolant can be applied to the rolling stock with the aid of cooling nozzles.
- FIG. 1 shows a rolling mill 2 with work rolls 3 and back-up rolls 4 for rolling a rolling stock 1.
- the rolling stock 1 is preferably band-shaped and as a metal strip, for example, steel strip or light metal strip, for example made of aluminum.
- the rolling stock 1 passes through the roll stand 2 in the longitudinal direction x.
- the rolling stand 2 has a plurality of work rolls 3, which extend in the width direction y and are arranged substantially one above the other. Between the work rolls 3 is the nip 9, which passes through the rolling stock 1 during the rolling process.
- cooling nozzles 5 are arranged, which are directed to one or more of the work rolls 3 and / or on the rolling stock 1.
- the cooling nozzles 5 are used to apply coolant 8 to the rolling stock 1 and / or to the work rolls 3. Especially during cold rolling, the rolls 3, 4 and the rolling stock 1 can be cooled with so-called rolling oil as the coolant 8.
- the rolling oil serves at the same time to lubricate the nip 9.
- the coolant 8 may have an oil emulsion.
- the coolant 8 may at least partially consist of water.
- the rolling stand 2 and the rolling stock 1 therein are supplied by at least one drive not shown in the drawing energy. Much of this Energy is dissipated with the moving, heated rolling stock 1 and via the coolant 8, in particular the rolling oil.
- the distribution of the discharged energy to the rolling stock 1 and the coolant 8 depends on various circumstances, such as the type of material to be rolled, material hardness, deformation resistance and speed of the rolling stock 1 from.
- the cooling nozzles 5 are preferably on one or more beams 10 (see FIG. 2 , in FIG. 1 not shown in detail) arranged.
- a roll stand 2 On a roll stand 2 are preferably per work roll 3, one to three bars 10 for cooling and optionally additionally provided a further beam 10 for lubrication.
- a flatness measuring system 6 is arranged, which is coupled to the rolling stand 2 via a control computer 7.
- FIG. 2 shows a arranged above the rolling stock 1 beam 10 of a cooling system for cooling the rolling stock 1 and / or the rollers 3, 4.
- the rolling stock is shown in section.
- On the bar 10 a plurality of cooling nozzles 5 are arranged, at least partially to the rolling stock 1 and / or the one in FIG. 2 Work roll 3 not shown are directed.
- the cooling nozzles 5 are each associated with zones 11, these zones 11 may have different widths b 1 and b 2 .
- small cooling zones are shown with a width b 2 and large cooling zones with a width b 1 , wherein the width b 1 is twice as large as the width b. 2
- In the in FIG. 2 example shown is on a bar 10 per zone 11 exactly one cooling nozzle 5 is provided.
- arrangement can be easily transferred in reverse to a arranged below the rolling stock 1 cooling system with cooling nozzles 5 and at least one beam 10.
- FIG. 3 shows the distribution of the zones 11 relative to the rolling stock 1.
- the rolling stock 1 is shown in plan view.
- the necessary total amount of cooling for cooling in the rolling stand 2 is determined as a function of the effective power in the nip 9.
- the necessary total amount of cooling can be determined proportional to the effective power in the nip 9.
- the effective power in the nip 9 is composed of the power of the at least one drive of the roll stand 2, plus the output in the run-out of the roll stand 2, minus the power in the intake run of the roll stand 2.
- the resulting performance in the nip 9 is in work of deformation and thus in Heat converted.
- the effective power in the nip 9 is determined in the speed control of the rolling stock to be rolled 1 effective drives.
- the rolling stock 1 which passes through a rolling train, the drives of several rolling stands 2 are effective.
- the total amount of cooling is preferably limited to a minimum value at a low rolling speed.
- the total cooling quantity is limited to a maximum value at high rolling speeds.
- cooling nozzles 5 are each associated with zones 11, wherein each zone 11 at least one, preferably exactly one cooling nozzle 5 is provided.
- a total quantity regulator of the multi-zone cooling control is superimposed, which ensures that the required total cooling quantity is set by increasing or decreasing the amount of cooling in the individual zones 11 of the cooling. This ensures that the required total amount of cooling is kept as constant as possible under constant conditions. In this way, it is avoided that the rolling stock 1 and the rolls 3, 4, in particular the working rolls 3, heat excessively.
- the adjustment of the cooling amount for each individual zone 11 of the cooling takes place by determining the on-off-time ratio of the cooling valve of the corresponding cooling nozzle 5 or by a proportional valve.
- the total cooling quantity CS resulting from the flatness measurement or from the flatness control is compared with the predetermined total cooling quantity VS.
- the predetermined total amount of cooling VS is preferably determined as described above as an example depending on the effective power in the nip. From the resulting total cooling amount difference SD becomes calculated additional cooling component Ca for the individual cooling nozzles 5 and zones 11. This takes into account that a minimum or maximum cooling amount per zone 11 can not be fallen below or exceeded, and that different zone widths b 1 , b 2 (see FIG. 2 ) condition different coolant flow rates. A distinction is made between missing quantities of cooling components mk with respect to zones 11 of large width b 1 and excess quantities of cooling components mg relative to zones of large width b 1 .
- the excess cooling proportions mg based on zones 11 of large width b 1 are subtracted from the total cooling amount fractions mz relative to zones 11 of large width b 1 in order to determine the additional cooling amount fraction Ca for the individual cooling nozzles 5.
- This additional amount of cooling Ca is now not directly on the cooling volume distribution C Z added, but converted into a control deviation r and added to the controller output of each zone 11.
- the comparison of the total amount of cooling CS with the predetermined total amount of cooling VS and the resulting correction of the controller output is repeated until the difference between the total amount of cooling CS and the predetermined total amount of cooling VS falls below a predefinable value.
- the invention relates to a method for applying a coolant 8 to a rolling stock 1 and / or at least one roller 3, 4 of a roll stand 2 with a nip 9.
- a total amount of cooling to be applied is first determined as a function of the effective power in the nip 9.
- cooling quantities for a plurality of zones 11 are determined as a function of the deviation of the flatness distribution determined by means of a flatness measuring system 6, wherein a cooling quantity difference is determined by comparing the sum of the thus determined cooling quantities with the previously determined total cooling quantity, on the basis of which additional cooling quantity components for the zones 11 taking into account upper - And lower limits of the cooling quantities for the zones 11 are determined.
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Abstract
Description
Die Erfindung betrifft ein Verfahren zum Aufbringen eines Kühlmittels auf ein Walzgut und/oder auf mindestens eine Arbeitswalze eines Walzgerüsts mit einem Walzspalt, wobei das Walzgut unter Zuhilfenahme des Walzgerüsts gewalzt wird. Weiterhin betrifft die Erfindung auch ein Walzgerüst.The invention relates to a method for applying a coolant to a rolling stock and / or to at least one work roll of a roll stand having a roll gap, wherein the rolled stock is rolled with the aid of the roll stand. Furthermore, the invention also relates to a rolling stand.
Der Einsatz von Kühl- und Schmiermittel beim Walzen von Walzgut ist beispielsweise bekannt aus "
Das Aufbringen von Kühlmittel, in der Regel Öl bzw. Ölemulsion, dient zum Kühlen des Walzguts und/oder der Walzen eines Walzgerüsts. Gleichzeitig wird durch Öl bzw. Ölemulsion auch der Walzspalt des Walzgerüsts geschmiert. Das Kühlmittel kann somit auch bzw. im Extremfall sogar ausschließlich als Schmiermittel dienen.The application of coolant, usually oil or oil emulsion, is used to cool the rolling stock and / or the rolls of a roll stand. At the same time, the rolling gap of the roll stand is lubricated by oil or oil emulsion. The coolant can thus even or in extreme cases even serve exclusively as a lubricant.
Aus der Offenlegungsschrift
Aus der europäischen Patentanmeldung
Aus der Patentschrift
Aus der japanischen Offenlegungsschrift
Aufgabe der Erfindung ist es, ein Kühlmittel auf ein Walzgut und/oder auf mindestens eine Arbeitswalze eines Walzgerüsts derart aufzubringen, dass möglichst konstante und stabile Kühl- bzw. Schmierbedingungen gewährleistet sind.The object of the invention is to apply a coolant to a rolling stock and / or to at least one work roll of a roll stand such that the most constant and stable cooling or lubricating conditions are ensured.
Diese Aufgabe wird gelöst durch ein Verfahren zum Aufbringen eines Kühlmittels auf ein Walzgut und/oder auf mindestens eine Arbeitswalze eines Walzgerüsts mit einem Walzspalt, wobei das Walzgut unter Zuhilfenahme des Walzgerüsts gewalzt wird, und wobei die Menge des aufzubringenden Kühlmittels in Abhängigkeit der im Walzspalt wirksamen Leistung ermittelt wird, wobei sich die im Walzspalt wirksame Leistung aus der Leistung des mindestens einen Antriebs des Walzgerüsts, zuzüglich der Leistung im Auslaufzug des Walzgerüsts, abzüglich der Leistung im Einlaufzug des Walzgerüsts zusammensetzt. Derart werden störende Dickeneinflüsse minimiert und zu hohe Band- bzw. Walzentemperaturen vermieden.This object is achieved by a method for applying a coolant to a rolling stock and / or at least one work roll of a roll stand having a roll gap, wherein the rolling stock is rolled with the aid of the roll stand, and wherein the amount of coolant to be applied as a function of effective in the roll gap Performance is determined, wherein the effective power in the nip of the performance of the at least one drive of the rolling mill, plus the output in the outlet run of the roll stand, less the power in the inlet run of the roll stand composed. In this way disturbing thickness influences are minimized and excessive belt or roller temperatures are avoided.
Vorzugsweise kann die Menge des aufzubringenden Kühlmittels proportional zu der im Walzspalt wirksamen Leistung ermittelt werden.Preferably, the amount of coolant to be applied can be determined in proportion to the effective power in the nip.
Mit Vorteil kann die Planheit des Walzguts über mehrere Zonen in Breitenrichtung hinweg ermittelt werden, wobei das Kühlmittel in Abhängigkeit der ermittelten Planheitsverteilung über die mehreren Zonen verteilt auf das Walzgut und/oder auf die mindestens einer Arbeitswalze aufgebracht wird.Advantageously, the flatness of the rolling stock can be determined over a plurality of zones in the width direction, wherein the coolant is applied as a function of the determined flatness distribution distributed over the plurality of zones on the rolling stock and / or on the at least one work roll.
Zweckmäßigerweise kann das Verfahren mit folgenden Schritten ausgeführt werden:
- i) Bestimmen einer aufzubringenden Gesamtkühlmenge in Abhängigkeit der im Walzspalt wirksamen Leistung,
- ii) bestimmen von Kühlmengen für mehrere über die Breitenrichtung hinweg angeordneten Zonen in Abhängigkeit einer Regelabweichung der Planheitverteilung,
- iii) ermitteln einer Kühlmengendifferenz durch Vergleich der Summe der Kühlmengen gemäß Schritt ii) mit der Gesamtkühlmenge gemäß Schritt i),
- iv) ermitteln von Zusatzkühlmengenanteilen für die Zonen auf Grundlage der Kühlmengendifferenz gemäß Schritt III) unter Berücksichtigung von Ober- und Untergrenze der Kühlmengen für die Zonen,
- v) wiederholen der Schritte ii) bis iv) bis die Kühlmengendifferenz gemäß Schritt iii) einen vorgebbaren Wert unterschreitet.
- i) determining a total amount of cooling to be applied as a function of the effective power in the nip,
- ii) determine cooling quantities for a plurality of zones arranged across the width direction as a function of a control deviation of the flatness distribution,
- iii) determining a cooling-quantity difference by comparing the sum of the cooling quantities according to step ii) with the total cooling quantity according to step i),
- iv) determining additional cooling flow rates for the zones based on the cooling flow difference according to step III) taking into account the upper and lower limits of the cooling volumes for the zones,
- v) repeating steps ii) to iv) until the cooling quantity difference according to step iii) falls below a predefinable value.
Mit Vorteil kann das Kühlmittel unter Zuhilfenahme von Kühldüsen auf das Walzgut aufgebracht werden.Advantageously, the coolant can be applied to the rolling stock with the aid of cooling nozzles.
Die der Erfindung zugrunde liegende Aufgabe wird auch gelöst, durch den Gegenstand der Patentansprüche 7 bis 10.The object underlying the invention is also achieved by the subject matter of the claims 7 to 10.
Weitere Vorteile und Einzelheiten der Erfindung werden nachfolgend beispielhaft anhand der Zeichnungen erläutert. Es zeigen:
- FIG 1
- ein Walzgerüst mit Planheitsmesssystem und Steuerrechner,
- FIG 2
- ein Beispiel für ein Kühlsystem mit mehreren in Breitenrichtung angeordneten Zonen,
- FIG 3
- ein Beispiel für die Anordnung der Zonen mit Bezug auf das Walzgut,
- FIG 4
- schematisch den Ablauf des Verfahrens zum Bestimmen der Kühlmengen für die einzelnen Zonen.
- FIG. 1
- a rolling stand with flatness measuring system and control computer,
- FIG. 2
- an example of a cooling system with several zones arranged in the width direction,
- FIG. 3
- an example of the arrangement of the zones with respect to the rolling stock,
- FIG. 4
- schematically the flow of the method for determining the cooling amounts for the individual zones.
Dem Walzgerüst 2 und dem darin befindlichen Walzgut 1 werden durch mindestens einen in der Zeichnung nicht näher dargestellten Antrieb Energie zugeführt. Ein Großteil dieser Energie wird mit dem sich bewegenden, erwärmten Walzgut 1 und über das Kühlmittel 8, insbesondere das Walzöl, abgeführt. Die Aufteilung der abgeführten Energie auf das Walzgut 1 und das Kühlmittel 8 hängt von verschiedenen Umständen, wie beispielsweise Art des zu walzenden Materials, Materialhärte, Verformungswiderstand und Geschwindigkeit des Walzguts 1 ab.The
Die Kühldüsen 5 sind vorzugsweise an einem oder mehreren Balken 10 (siehe
An einem Walzgerüst 2 sind vorzugsweise je Arbeitswalze 3, ein bis drei Balken 10 zur Kühlung und gegebenenfalls zusätzlich ein weiterer Balken 10 zur Schmierung vorgesehen.On a
In Bewegungsrichtung des Walzguts 1, im gezeigten Beispiel also in Längsrichtung x, dem Walzgerüst 2 nachgeordnet, also auf der Auslaufseite des Walzgerüsts 2 ist ein Planheitsmesssystem 6 angeordnet, welches über einen Steuerrechner 7 mit dem Walzgerüst 2 gekoppelt ist.In the direction of movement of the
In beispielhafter Ausgestaltung der Erfindung wird die notwendige Gesamtkühlmenge zur Kühlung im Walzgerüst 2 in Abhängigkeit von der im Walzspalt 9 wirksamen Leistung ermittelt. Vorzugsweise kann die notwendige Gesamtkühlmenge proportional zur im Walzspalt 9 wirksamen Leistung ermittelt werden. Die im Walzspalt 9 wirksame Leistung setzt sich zusammen aus der Leistung des mindestens einen Antriebs des Walzgerüsts 2, zuzüglich der Leistung im Auslaufzug des Walzgerüsts 2, abzüglich der Leistung im Einlaufzug des Walzgerüsts 2. Die resultierende Leistung im Walzspalt 9 wird in Verformungsarbeit und damit in Wärme umgesetzt.In an exemplary embodiment of the invention, the necessary total amount of cooling for cooling in the rolling
Die im Walzspalt 9 wirksame Leistung wird in den Drehzahlregelungen der am zu walzenden Walzgut 1 wirksamen Antriebe, ermittelt. In der Regel sind am Walzgut 1, das eine Walzstraße durchläuft, die Antriebe mehrerer Walzgerüste 2 wirksam.The effective power in the
Die Gesamtkühlmenge wird bei kleiner Walzgeschwindigkeit vorzugsweise auf einen Mindestwert begrenzt. Mit Vorteil erfolgt analog eine Begrenzung der Gesamtkühlmenge auf einen Maximalwert bei großen Walzgeschwindigkeiten.The total amount of cooling is preferably limited to a minimum value at a low rolling speed. Advantageously, the total cooling quantity is limited to a maximum value at high rolling speeds.
Wie in den
Zur exakten Einstellung der in Abhängigkeit von der im Walzspalt 9 wirksamen Leistung ermittelten Gesamtkühlmenge, wird ein Gesamtmengenregler der Vielzonen-Kühlungsregelung überlagert, der dafür sorgt, dass die erforderliche Gesamtkühlmenge durch Erhöhen bzw. Vermindern der Kühlmenge in den einzelnen Zonen 11 der Kühlung eingestellt wird. Dabei wird sichergestellt, dass die erforderliche Gesamtkühlmenge bei konstanten Bedingungen möglichst konstant gehalten wird. Derart wird vermieden, dass sich das Walzgut 1 und die Walzen 3, 4, insbesondere die Arbeitswalzen 3 übermäßig erwärmen. Die Einstellung der Kühlmenge für jede einzelne Zone 11 der Kühlung erfolgt durch Bestimmung des Ein-Ausschalt-Zeitverhältnisses des Kühlventils der entsprechenden Kühldüse 5 oder durch ein Proportionalventil.For exact adjustment of the total cooling quantity determined as a function of the effective power in the
Wie in
Vom überlagerten Gesamtmengenregler wird die sich aus der Planheitsmessung bzw. aus der Planheitsregelung ergebende Gesamtkühlmenge CS mit der vorgegebenen Gesamtkühlmenge VS verglichen. Die vorgegebene Gesamtkühlmenge VS wird vorzugsweise wie vorangehend beispielhaft beschrieben in Abhängigkeit von der im Walzspalt wirksamen Leistung ermittelt. Aus der sich daraus ergebenden gesamten Kühlmengendifferenz SD wird ein zusätzlicher Kühlmengenanteil Ca für die einzelnen Kühldüsen 5 bzw. Zonen 11 berechnet. Hierbei wird berücksichtigt, dass eine minimale bzw. maximale Kühlmenge je Zone 11 nicht unter- bzw. überschritten werden kann, und dass unterschiedliche Zonenbreiten b1, b2 (siehe
Der wesentliche der Erfindung zugrunde liegende Gedanke lässt sich wie folgt zusammenfassen:The essential idea underlying the invention can be summarized as follows:
Die Erfindung betrifft ein Verfahren zum Aufbringen eines Kühlmittels 8 auf ein Walzgut 1 und/oder auf mindestens eine Walze 3, 4 eines Walzgerüsts 2 mit einem Walzspalt 9. Dabei wird zunächst eine aufzubringende Gesamtkühlmenge in Abhängigkeit der im Walzspalt 9 wirksamen Leistung bestimmt. Dann werden Kühlmengen für mehrere Zonen 11 in Abhängigkeit der mittels eines Planheitsmesssystems 6 ermittelten Regelabweichung der Planheitsverteilung bestimmt, wobei durch Vergleich der Summe der so ermittelten Kühlmengen mit der zuvor bestimmten Gesamtkühlmenge eine Kühlmengendifferenz ermittelt wird, aufgrund derer Zusatzkühlmengenanteile für die Zonen 11 unter Berücksichtigung von Ober- und Untergrenzen der Kühlmengen für die Zonen 11 ermittelt werden. Dieses Vorgehen wird solange wiederholt, bis die Kühlmitteldifferenz einen vorgebbaren Wert unterschreitet. Erfindungsgemäß wird durch das Einhalten der vorgegebenen Gesamtkühlmenge VS für konstante und stabile Kühl- und Schmierbedingungen gesorgt. Dickeneinflüsse des Walzguts 1 und überhöhte Temperaturen des Walzguts 1 bzw. der Walzen 3, 4 werden vermieden.The invention relates to a method for applying a coolant 8 to a
Claims (9)
- Method for applying a coolant (8) to a rolled product (1) and/or to at least one working roll (3) of a roll stand (2) having a roll gap (9), wherein the rolled product (1) is rolled with the aid of the roll stand (2), characterized in that the quantity of the coolant (8) which must be applied is determined as a function of the effective power in the roll gap, wherein the effective power in the roll gap (9) is made up of the power of the at least one drive of the roll stand (2), plus the power related to the tension of the product in the exit side of the roll stand (2), minus the power related to the tension of the product in the entry side of the roll stand (2).
- Method according to claim 1, characterized in that the quantity of the coolant (8) which must be applied is determined in proportion to the effective power in the roll gap (9).
- Method according to one of the preceding claims, characterized in that the flatness of the rolled product (1) is determined over a plurality of zones (11) in the widthwise direction (y) of the rolled product (1), and that the coolant (8) is applied in a distributed manner to the rolled product (1) and/or to the at least one working roll (3) as a function of the determined flatness distribution over the plurality of zones (11).
- Method according to one of the preceding claims, comprising the following steps:i) specifying a total cooling quantity which must be applied as a function of the effective power in the roll gap (9);ii) specifying cooling quantities for the zones (11) as a function of a control deviation of the flatness distribution;iii) determining a cooling quantity difference by comparing the sum of the cooling quantities that were specified as per step ii) with the total cooling quantity that was specified as per step i);iv) determining additional cooling quantity portions for the zones (11) on the basis of the cooling quantity difference that was determined as per step iii), subject to upper and lower limits of the cooling quantities for the zones (11);v) repeating steps ii) to iv) until the cooling quantity difference as per step iii) falls below a predeterminable value.
- Method according to one of the preceding claims, characterized in that the coolant (8) can be applied to the rolled product (1) with the aid of a plurality of cooling nozzles (5), each of which is assigned to a zone (11).
- Computer program product comprising program code means which are suitable for carrying out the steps of a method as claimed in one of the preceding claims when the computer program product is executed on a control processor (7).
- Control processor (7) for at least one roll stand (2), characterized in that it is programmed using a computer program product as claimed in claim 6.
- Roll stand (2) with a cooling system (5,10), including a flatness measuring system (6) and a control processor (7) as claimed in claim 7, wherein the control processor (7) is linked to the flatness measuring system (6) and the cooling system (5, 10).
- Roll stand (2) according to claim 8, wherein the cooling system (5,10) has a plurality of cooling nozzles (5) which are arranged on at least one bar (10).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL06777383T PL1907145T3 (en) | 2005-06-24 | 2006-06-21 | Coolant applying method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005029461A DE102005029461B3 (en) | 2005-06-24 | 2005-06-24 | Applying coolant to rolled stock and/or to working rolls in a roll stand comprises applying the coolant in an amount depending on the work done in the gap between the rolls |
PCT/EP2006/063382 WO2006136570A1 (en) | 2005-06-24 | 2006-06-21 | Coolant applying method |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1907145A1 EP1907145A1 (en) | 2008-04-09 |
EP1907145B1 true EP1907145B1 (en) | 2008-12-31 |
Family
ID=37067661
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06777383A Active EP1907145B1 (en) | 2005-06-24 | 2006-06-21 | Coolant applying method |
Country Status (12)
Country | Link |
---|---|
US (1) | US8387433B2 (en) |
EP (1) | EP1907145B1 (en) |
CN (1) | CN101287557B (en) |
AT (1) | ATE419077T1 (en) |
BR (1) | BRPI0612516A8 (en) |
DE (2) | DE102005029461B3 (en) |
DK (1) | DK1907145T3 (en) |
ES (1) | ES2317569T3 (en) |
PL (1) | PL1907145T3 (en) |
RU (1) | RU2418643C2 (en) |
UA (1) | UA92346C2 (en) |
WO (1) | WO2006136570A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007053523A1 (en) * | 2007-05-30 | 2008-12-04 | Sms Demag Ag | Device for influencing temperature distribution over width of slab or strip, particularly in one or multiple hot strip mill, has cooling device, which is provided with nozzles for applying cooling agent on slab or strip |
BRPI0815931A2 (en) * | 2007-08-28 | 2018-01-09 | Air Prod & Chem | method and apparatus for use in an industrial process |
US9889480B2 (en) | 2013-03-11 | 2018-02-13 | Novelis Inc. | Flatness of a rolled strip |
EP2842646A1 (en) | 2013-08-29 | 2015-03-04 | Siemens Aktiengesellschaft | Method and device for tempering rollers |
PL3140057T5 (en) * | 2014-05-09 | 2023-02-27 | Novelis, Inc. | Hybrid oil and water cooled rolling |
CN112474797B (en) * | 2020-10-23 | 2022-10-14 | 福建三宝特钢有限公司 | 2.0mm corrosion-resistant hot-rolled coiled plate rolling process |
JP7447779B2 (en) * | 2020-12-21 | 2024-03-12 | 東芝三菱電機産業システム株式会社 | Shape control system for rolled materials |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3150548A (en) * | 1961-06-26 | 1964-09-29 | United States Steel Corp | Method and apparatus for controlling the thickness of rolled strip |
US3802237A (en) * | 1972-05-26 | 1974-04-09 | United States Steel Corp | Localized strip shape control and display |
AT345237B (en) * | 1976-12-28 | 1978-09-11 | Voest Ag | DEVICE FOR ROLLING STRIP OR TABLE-SHAPED ROLLED MATERIAL |
DE2927769C2 (en) | 1979-07-10 | 1987-01-22 | SMS Schloemann-Siemag AG, 4000 Düsseldorf | Device for controlling the flatness of strip-shaped metal rolling stock in a cold rolling mill |
SU1296248A1 (en) | 1984-03-21 | 1987-03-15 | Украинский научно-исследовательский институт металлов | Method of cooling sized rolls of rolling mill |
EP0222041B1 (en) * | 1985-11-15 | 1991-02-06 | KABUSHIKI KAISHA KOBE SEIKO SHO also known as Kobe Steel Ltd. | Method for controlling shape of material in rolling process |
JPH02197309A (en) | 1989-01-23 | 1990-08-03 | Sumitomo Metal Ind Ltd | Method for controlling sheet shape by coolant |
FR2723012A1 (en) * | 1994-08-01 | 1996-02-02 | Mannesmann Ag | METHOD FOR CONTROLLING THE TEMPERATURE WHEN LAMINATING A HOT STRIP |
EP0776710B1 (en) * | 1995-11-20 | 2001-12-19 | SMS Demag AG | Device for influencing the profile section of a rolled strip |
DE19744503A1 (en) | 1997-10-09 | 1999-04-15 | Schloemann Siemag Ag | Device and method for influencing the frictional relationships between an upper and a lower roll of a roll stand |
DE19846900C2 (en) * | 1998-10-12 | 2000-08-10 | Thyssenkrupp Stahl Ag | Method and device for producing a metal strip for tailored blanks |
-
2005
- 2005-06-24 DE DE102005029461A patent/DE102005029461B3/en not_active Expired - Fee Related
-
2006
- 2006-06-21 WO PCT/EP2006/063382 patent/WO2006136570A1/en active Application Filing
- 2006-06-21 EP EP06777383A patent/EP1907145B1/en active Active
- 2006-06-21 CN CN2006800226001A patent/CN101287557B/en active Active
- 2006-06-21 ES ES06777383T patent/ES2317569T3/en active Active
- 2006-06-21 DK DK06777383T patent/DK1907145T3/en active
- 2006-06-21 UA UAA200713979A patent/UA92346C2/en unknown
- 2006-06-21 AT AT06777383T patent/ATE419077T1/en active
- 2006-06-21 PL PL06777383T patent/PL1907145T3/en unknown
- 2006-06-21 RU RU2008102645/02A patent/RU2418643C2/en active
- 2006-06-21 DE DE502006002516T patent/DE502006002516D1/en active Active
- 2006-06-21 BR BRPI0612516A patent/BRPI0612516A8/en not_active IP Right Cessation
- 2006-06-21 US US11/922,581 patent/US8387433B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
BRPI0612516A8 (en) | 2016-10-18 |
PL1907145T3 (en) | 2009-06-30 |
DE102005029461B3 (en) | 2006-12-07 |
ES2317569T3 (en) | 2009-04-16 |
EP1907145A1 (en) | 2008-04-09 |
CN101287557A (en) | 2008-10-15 |
CN101287557B (en) | 2011-04-13 |
WO2006136570A1 (en) | 2006-12-28 |
ATE419077T1 (en) | 2009-01-15 |
US20090084153A1 (en) | 2009-04-02 |
DK1907145T3 (en) | 2009-04-27 |
UA92346C2 (en) | 2010-10-25 |
BRPI0612516A2 (en) | 2010-11-30 |
RU2418643C2 (en) | 2011-05-20 |
DE502006002516D1 (en) | 2009-02-12 |
US8387433B2 (en) | 2013-03-05 |
RU2008102645A (en) | 2009-07-27 |
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