EP0998993B1 - Procédé et dispositif pour refroidir des produits de laminage chauds, notamment des bandes larges laminées à chaud - Google Patents

Procédé et dispositif pour refroidir des produits de laminage chauds, notamment des bandes larges laminées à chaud Download PDF

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Publication number
EP0998993B1
EP0998993B1 EP99121521A EP99121521A EP0998993B1 EP 0998993 B1 EP0998993 B1 EP 0998993B1 EP 99121521 A EP99121521 A EP 99121521A EP 99121521 A EP99121521 A EP 99121521A EP 0998993 B1 EP0998993 B1 EP 0998993B1
Authority
EP
European Patent Office
Prior art keywords
cooling
roll
coolant
rolling stock
rolling
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.)
Expired - Lifetime
Application number
EP99121521A
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German (de)
English (en)
Other versions
EP0998993A2 (fr
EP0998993A3 (fr
Inventor
Uwe Dipl.-Ing. Plociennik
Meinert Dipl.-Ing. Meyer
Ludwig Dipl.-Math. Weingarten
Martin Dipl.-Ing. Braun
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 EP0998993A2 publication Critical patent/EP0998993A2/fr
Publication of EP0998993A3 publication Critical patent/EP0998993A3/fr
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Publication of EP0998993B1 publication Critical patent/EP0998993B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/06—Lubricating, cooling or heating rolls
    • B21B27/10—Lubricating, cooling or heating rolls externally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0218—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for strips, sheets, or plates

Definitions

  • the invention relates to a method for cooling hot rolling Rolled stock, preferably for double-sided cooling of hot wide strip heat exchange between every two spaced frames between rolling stock and cooling medium with the help of a pressure water flow made by a sequence of a pressure and convection space and the rolling stock by controlling the intensity of the forced convection is cooled.
  • the invention also relates to a device to carry out the procedure.
  • DE 39 27 276 A1 discloses a method for hardening steel with liquid cooling media. It follows that with the previously known methods for hardening steel with the aid of liquid cooling media, only a small hardening depth, based on the edge zone, is achieved even with rods with small rod diameters. In contrast, with the method according to DE 39 29 276 A1 not only a considerable increase in the hardening depth, but also a complete hardening, in particular of rod-shaped rolled products up to 70 mm in diameter, is made possible in a particularly simple manner in that the rolled product made of steel immediately after the rolling process a cooling section provided with cooling media is exposed to high flow velocities.
  • the flow velocities in the cooling section are expediently so high that heat transfer numbers greater than or equal to 50,000 W / m 2 K are generated and the rolling stock is cooled therein until the average temperature of the rolling stock cross-section is below the MS temperature, so that after leaving the cooling section
  • the temperature compensation over the cross-section converts the austenite still present in the core into intermediate structure (bainite), while at the same time a large part of the overlapping thermal and transformation stresses is reduced in the martensitic marginal zone by increasing the temperature to a maximum of MS temperature.
  • roller cooling is that the roller is a certain temperature must not exceed the strength the roller surface and thus the service life accordingly.
  • gap cooling As a remedy, according to document DE 36 16 070 C2 So-called gap cooling is proposed, cooling water via a infeed opening arranged at the lower end of a heat sink a cooling gap partially surrounding the roll barrel on the circumference fed in and arranged at the upper end of the heat sink Exit opening is fed out of the cooling gap again.
  • a seal of the Cooling gap is caused in that the heat sink made of elastic Material is placed under pressure on the roller. It can damage, e.g. caused by abrasion of the roller shell, causing marks on the strip to be rolled can.
  • the present invention is based on the aforementioned prior art the task is based on a method in the preamble of claim 1 mentioned type to improve and train to the same Length of the cooling section between two scaffolds is clear to realize increased cooling effect of the rolling stock, or at the same Cooling effect to significantly reduce the length of the cooling section.
  • the device provided for this purpose according to the invention is to be found under Avoiding the disadvantages and difficulties of the prior art a problem-free implementation of the method according to the invention enable.
  • An embodiment of the invention provides that the cooling of the hot rolled rolling stock between the stands mutually complementary pressurized water flows for a functional overall cooling effect he follows.
  • An embodiment of the method according to the invention provides that the intermediate stand cooling directly to the roll cooling on Outlet of the roll gap is connected.
  • the method provides that the Intensity of forced convection and thus the cooling effect on the one hand the roller cooling and on the other hand the intermediate stand cooling individually adjustable parameters such as quantity, pressure and flow speed the cooling water flow independently is settled.
  • roller cooling as well as the interframe cooling from a common pressurized water source, however with independently adjustable pressure and quantity be fed.
  • the method also provides a great advantage, the cooling medium by means of contactless sealing of its flow paths the areas to be cooled of roll bales or rolling stock is dissipated.
  • the device according to the invention for intensive cooling of hot whales Rolled material consists of at least one cooling unit for both sides Cooling hot wide strip between two spaced frames one Finishing line, with one on each side of the belt for heat exchange formed between the rolling stock and the cooling medium by forced convection Pressure space and convection space of a flow channel for training a directed flow of the cooling medium and control of the intensity forced convection according to the flow velocity, combined with at least one upstream of the rolling direction arranged heat sink for cooling the work rolls of an upstream Framework, the heat sink each on one of the rollers a gap to which cooling medium can be applied by forced convection in the flow area between a cooling water supply and one Cooling water discharge and the cooling unit or the heat sink non-contact seals against those to be cooled Have areas of belt and roller.
  • An advantageous embodiment of the device provides that the Gap with the formation of two opposing flow paths preferably one adjustable feed at each end for cooling medium and formed approximately in the middle with a diffuser is and this with a collecting space for cooling medium to be removed communicates.
  • Any flow path can be used to control the quantity of cooling medium supplied advantageously a throttle element in the form of an adjustable nozzle gap be assigned.
  • the pressure chamber of the cooling unit on the inlet side of the rolling stock for the cooling medium in the form of a quantity and pressure adjustable Nozzle gap and a terminal diffuser with means for Deducting the cooling medium and that in the rolling direction before A baffle element delimiting the pressure space is arranged on the diffuser, that represents the beginning of the convection room. That is advantageous Damming element while changing the length of the pressure chamber and the Convection room longitudinally adjustable in the rolling direction.
  • the nozzle gap has a wedge as an actuator.
  • a practical design of the cooling unit provides that the diffuser in the area of increased cooling medium pressure Removing heated cooling medium. It is particularly advantageous that the cooling unit for roller cooling and the cooling unit for Rolling stock cooling are combined to form a structural unit. there the outlet of the cooling water at the roller cooling unit is closed, so that the cooling water of the roller cooling unit in the inlet funnel of the rolling stock cooling unit flows.
  • Figure 1 shows the device for cooling hot rolled rolling stock or Hot wide strip 10. Cooling of Hot wide strip between two spaced-apart stands 8, 9 Heat exchange between hot strip 10 and cooling medium with the help a forced pressure water flow 14 between one Water inlet 12 and a water outlet 13 by a sequence of Pressure 21 and convection space 22 and the rolling stock 10 through targeted control of the flow rate cooling intensity of the forced convection. 15 denotes a terminal diffuser at the end of the cooling section, from the cooling water consumed with the water outlet 13 is dissipated. With the intermediate frame cooling 20 is according to the invention an additional roller cooling 19 in the area of the outlet side Roll gap 11 using a directionally enforceable flow of pressurized water 25 along a circumferential area of the roll barrel 2 each work roll 3 is provided.
  • the cooling of the hot rolled material 10 is due to the combination an intermediate stand cooling 20 of the strip between the stands 8, 9 with intensive roller cooling 19 two under forced convection mutually complementary pressurized water flows 25 to one functional unit with significantly increased total cooling effect optimized.
  • the temperature curve assigned to the two cooling devices 19, 20 in the form a dashed line shows that the surface temperature of the Rolling strip in the nip 11 first drops sharply and then until the entry of the rolled strip 10 into the cooling unit 20 as a result the core heat of the belt (temperature compensation) increases again and after entering the cooling unit 20 gradually drops until after Exit from the cooling unit 20 again slowly due to temperature compensation increases.
  • Figure 1 further shows that at least the water inlets 12 of the cooling section 20 and the water inlets 12 'of the roller cooling 19 with a - symbolically indicated - throttle body can be equipped.
  • the intensity of the forced convection and thus the cooling effect on the one hand the roller cooling 19 and on the other hand the intermediate stand cooling 20 through individually adjustable parameters such as Amount, pressure and flow rate of the cooling water flow regulated independently of each other.
  • Both the roller cooling 19 and the interframe cooling 20 can also be from a common source of pressurized water, however with independently adjustable pressure and quantity be fed.
  • the cooling media are by means of non-contact sealing of the flow paths, For example, in the cooling unit 20 by terminal labyrinth seals 16, 16 'and in the heat sink 19 by fluidic Measures taken in the area of the nozzle column 1.
  • the cooling unit 20 has at the end for removing cooling medium of the flow channel 23 a diffuser 15, from which used Cooling medium is discharged with the water outlet 13.
  • FIG. 2 shows that the cooling unit 20 and the heat sink 19 to are combined in one structural unit. Occurs in the heat sink 19 at 12 'cooling water and flows along the roll barrel 2 onto the Warm broadband 10 is deflected there and flows in a channel above and below the hot wide strip 10 in the cooling unit 20.
  • the cooling of the hot wide strip in the cooling unit takes place in the same way as explained for Figure 1. That of the unit of heat sink 19 and cooling unit 20 assigned temperature curve in the form of a dashed line resembles the temperature curve of the Cooling according to FIG. 1, but with the difference that the temperature of the hot broadband is comparatively lower due to its core heat increases before the gradual temperature drop in the cooling unit 20 takes place.

Claims (16)

  1. Procédé pour refroidir des produits de laminage chaud avec un refroidissement de cage intermédiaire (20), avec lequel un échange de chaleur entre le produit de laminage (10) et l'agent de refroidissement à l'aide d'un écoulement d'eau sous pression (14) est effectué par une succession d'un espace de pression (21) et d'un espace de convection (22) pour le refroidissement de préférence par les deux côtés de bande large laminée à chaud entre respectivement deux cages (8, 9) espacées et le produit de laminage (10) est refroidi par un contrôle approprié de l'intensité de la convection forcée,
    caractérisé par
    une combinaison du refroidissement de cage intermédiaire (20) avec un refroidissement supplémentaire de cylindres (19) dans la zone de l'emprise (11) côté sortie avec l'utilisation d'un écoulement dirigé d'eau sous pression (25) le long d'une zone périphérique de la table de cylindre (2) de chaque cylindre de travail (3), le refroidissement de cage intermédiaire (20) et le refroidissement de cylindre (19) travaillant respectivement avec des joints sans contact par rapport à la surface du produit de laminage et à la table de cylindre (21).
  2. Procédé selon la revendication 1,
    caractérisé en ce que
    le refroidissement (20) du produit de laminage (10) chaud entre les cages (8, 9) et le refroidissement de cylindre (19) s'effectue avec des écoulements d'eau sous pression (25) complémentaires les uns par rapport aux autres de façon à obtenir un effet de refroidissement global et fonctionnel.
  3. Procédé selon la revendication 1 ou 2,
    caractérisé en ce que,
    par l'abaissement de la température de la table de cylindre, la température superficielle du produit de laminage (10) dans l'emprise (11) est abaissée de telle sorte qu'elle se situe à proximité ou au-dessous de la température de gel de l'agent de refroidissement en cas d'entrée du produit de laminage dans le refroidissement consécutif de cage intermédiaire (20), ce qui entraíne un effet de refroidissement élevé dans le refroidissement de cage intermédiaire (20).
  4. Procédé selon l'une quelconque des revendications 1 à 3,
    caractérisé en ce que
    le refroidissement de cage intermédiaire (20) est rattaché directement au refroidissement de cylindre (19) à la sortie de la table de cylindre (11).
  5. Procédé selon l'une quelconque des revendications 1 à 4,
    caractérisé en ce que
    l'intensité de la convection forcée et donc l'effet de refroidissement d'une part du refroidissement de cylindre (19) et d'autre part du refroidissement de cage intermédiaire (20) est réglée par des paramètres réglables individuellement tels que la quantité, la pression et la vitesse d'écoulement de l'écoulement d'eau de refroidissement, de façon indépendante les uns des autres.
  6. Procédé selon l'une quelconque des revendications 1 à 5,
    caractérisé en ce que
    aussi bien le refroidissement de cylindre (19) que le refroidissement de cage intermédiaire (20) sont alimentés à partir d'une source commune d'eau sous pression, mais avec une pression et une quantité réglables indépendamment.
  7. Procédé selon l'une quelconque des revendications 1 à 6,
    caractérisé en ce que
    l'agent de refroidissement est amené et évacué de façon appropriée au moyen d'une étanchéité sans contact de ses voies d'écoulement par rapport aux surfaces à refroidir de la table de cylindre (2) ou du produit de laminage (10).
  8. Procédé selon l'une quelconque des revendications 1 à 7,
    caractérisé en ce que
    l'agent de refroidissement pour le refroidissement de cylindre (19) de chaque cylindre (3) est injecté par en haut et par en bas au moyen de respectivement une fente de buse (1) de préférence réglable le long d'au moins un canal d'eau de refroidissement (25) s'appuyant sur la table de cylindre (2), est guidé dans le contre-courant et est introduit côté sortie dans un diffuseur (4) et sorti de ce diffuseur et guidé dans un espace d'évacuation (6), d'où il est extrait de façon contrôlée.
  9. Dispositif pour le refroidissement intensif de produit de laminage chaud (10) selon l'une quelconque des revendications 1 à 8, avec au moins un groupe frigorifique (20) pour le refroidissement par les deux côtés de la bande large laminée à chaud entre deux cages (8, 9) espacées d'une chaíne de fabrication, avec de chaque côté de la bande un espace de pression (21) conçu pour l'échange de chaleur entre le produit de laminage et l'agent de refroidissement par convection forcée et avec un espace de convection (22) d'un conduit d'écoulement (23) pour la réalisation d'un écoulement orienté de l'agent de refroidissement et pour le contrôle de l'intensité de la convection forcée en fonction de la vitesse d'écoulement,
    caractérisé par
    au moins un corps de refroidissement (19) disposé en amont du sens de laminage (24) pour le refroidissement des cylindres de travail (3) d'une cage (8) disposée avant, le corps de refroidissement formant respectivement sur l'un des cylindres (3) une fente (25) pouvant être sollicité avec de l'agent de refroidissement sous convection forcée dans la zone d'écoulement entre une arrivée d'eau de refroidissement (1) et une évacuation d'eau de refroidissement (4) et le groupe frigorifique (20) ou le corps de refroidissement (19) présentant des étanchéités sans contact par rapport aux surfaces (2, 10) à refroidir de la bande et du cylindre.
  10. Dispositif selon la revendication 9,
    caractérisé en ce que
    la fente (25) présente sur chacune des deux extrémités une arrivée (1) réglable pour l'agent de refroidissement en formant deux trajectoires d'écoulement orientées dans le sens contraire, et est réalisée à peu prés au centre avec un diffuseur (4) et ce diffuseur est en liaison avec un espace récepteur (6) pour l'agent de refroidissement à évacuer.
  11. Dispositif selon la revendication 9 ou 10,
    caractérisé en ce que
    un organe d'étranglement est attribué à chaque trajectoire d'écoulement sous la forme d'une fente de buse (1) réglable pour le réglage de la quantité de l'agent de refroidissement amené.
  12. Dispositif selon la revendication 9,
    caractérisé en ce que
    l'espace de pression (21) du groupe frigorifique (20) présente sur le côté entrée du produit de laminage (10) une entrée d'écoulement (12) pour l'agent de refroidissement sous la forme d'une fente de buse réglable en quantité et en pression et un diffuseur (15) côté extrémité avec des moyens (13) pour l'extraction du produit de refroidissement et en ce que, dans le sens de laminage et avant le diffuseur (15), est disposé un élément de retenue limitant l'espace de pression, qui représente le début de l'espace de convection (22).
  13. Dispositif selon la revendication 12,
    caractérisé en ce que
    l'élément de retenue est réalisé de façon réglable en longueur en faisant varier la longueur de l'espace de pression (21) et de l'espace de convection (22) dans le sens de laminage (24).
  14. Dispositif selon la revendication 12 ou 13,
    caractérisé en ce que
    la fente de buse présente une clavette comme actionneur.
  15. Dispositif selon l'une quelconque des revendications 12 à 14,
    caractérisé en ce que
    le diffuseur (15) présente dans la zone de la pression élevée de l'agent de refroidissement des sorties (13) pour l'extraction de l'agent de refroidissement réchauffé.
  16. Dispositif selon l'une quelconque des revendications 9 à 15,
    caractérisé en ce que
    le groupe frigorifique (20) et le corps de refroidissement (19) sont regroupés en une unité modulaire.
EP99121521A 1998-11-04 1999-10-29 Procédé et dispositif pour refroidir des produits de laminage chauds, notamment des bandes larges laminées à chaud Expired - Lifetime EP0998993B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19850739 1998-11-04
DE19850739A DE19850739A1 (de) 1998-11-04 1998-11-04 Verfahren und Vorrichtung zum Kühlen von walzwarmem Walzgut, insbesondere Warmbreitband

Publications (3)

Publication Number Publication Date
EP0998993A2 EP0998993A2 (fr) 2000-05-10
EP0998993A3 EP0998993A3 (fr) 2001-11-14
EP0998993B1 true EP0998993B1 (fr) 2003-05-07

Family

ID=7886603

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99121521A Expired - Lifetime EP0998993B1 (fr) 1998-11-04 1999-10-29 Procédé et dispositif pour refroidir des produits de laminage chauds, notamment des bandes larges laminées à chaud

Country Status (5)

Country Link
US (1) US6142003A (fr)
EP (1) EP0998993B1 (fr)
JP (1) JP4444415B2 (fr)
AT (1) ATE239561T1 (fr)
DE (2) DE19850739A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008089827A1 (fr) * 2007-01-25 2008-07-31 Sms Siemag Ag Dispositif pour refroidir une bande métallique
WO2012171514A1 (fr) 2011-06-16 2012-12-20 Sms Siemag Ag Procédé et dispositif pour refroidir un cylindre de travail

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6652273B2 (en) * 2002-01-14 2003-11-25 The Procter & Gamble Company Apparatus and method for controlling the temperature of manufacturing equipment
DE102004051047A1 (de) * 2004-10-19 2006-04-27 Loi Thermprocess Gmbh Verfahren und Vorrichtung zum Abschrecken von Flachprodukten aus Stahl
US8321197B2 (en) * 2006-10-18 2012-11-27 Teresa Ruth Gaudet Method and process for performing category-based analysis, evaluation, and prescriptive practice creation upon stenographically written and voice-written text files
UA94499C2 (ru) * 2007-01-25 2011-05-10 Смс Зимаг Аг Устройство для охлаждения металлической полосы
DE102012202340A1 (de) 2011-12-23 2013-06-27 Sms Siemag Ag Verfahren und Vorrichtung zum Kühlen von Walzen
CN108856314A (zh) * 2018-07-12 2018-11-23 西南铝业（集团）有限责任公司 涂层金属带冷却装置
CN109252312A (zh) * 2018-11-08 2019-01-22 无锡市信文机械制造有限公司 可拆组的多变冷却装置
GR1009910B (el) * 2019-11-05 2021-01-19 Αιμιλιος Αριστοτελη Κουφος Πολυστρωματικη πολυλειτουργικη ταινια

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2927769A1 (de) * 1979-07-10 1981-02-05 Schloemann Siemag Ag Verfahren und anlage zur planwalzung von bandmaterial aus stahl und nichteisenmetall
JPS5886904A (ja) * 1981-11-18 1983-05-24 Mitsubishi Heavy Ind Ltd 熱間厚板圧延設備における鋼板の急速冷却装置
EP0130721A3 (fr) * 1983-06-24 1985-06-26 DAVY McKEE (POOLE) LIMITED Dispositif de refroidissement
KR930000465B1 (ko) * 1985-05-17 1993-01-21 가부시기가이샤 히다찌세이사꾸쇼 압연기의 로울냉각장치 및 로울냉각방법
DE3626741A1 (de) * 1986-08-07 1988-02-18 Krenn Walter Kuehlaggregat und verfahren zum abkuehlen walzwarmen walzguts, mit/ohne direktpatentieren, in druckkuehlwasser
DE3927276A1 (de) * 1989-08-18 1991-02-21 Schloemann Siemag Ag Verfahren zum haerten von stahl mit hilfe fluessiger kuehlmedien
US5517842A (en) * 1994-08-02 1996-05-21 Danieli United, Inc. Roll and strip cooling system for rolling mills
DE19737735A1 (de) * 1997-08-29 1999-03-04 Schloemann Siemag Ag Vorrichtung und Verfahren zur auslaufseitigen Kühlung der Arbeitswalzen eines Walzgerüstes

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008089827A1 (fr) * 2007-01-25 2008-07-31 Sms Siemag Ag Dispositif pour refroidir une bande métallique
DE102007010375A1 (de) 2007-01-25 2008-07-31 Sms Demag Ag Vorrichtung zur Kühlung eines Metallbandes
WO2012171514A1 (fr) 2011-06-16 2012-12-20 Sms Siemag Ag Procédé et dispositif pour refroidir un cylindre de travail
DE102011104735A1 (de) 2011-06-16 2012-12-20 Sms Siemag Ag Verfahren und Vorrichtung zum Kühlen einer Arbeitswalze

Also Published As

Publication number Publication date
JP2000140928A (ja) 2000-05-23
EP0998993A2 (fr) 2000-05-10
DE59905432D1 (de) 2003-06-12
EP0998993A3 (fr) 2001-11-14
JP4444415B2 (ja) 2010-03-31
US6142003A (en) 2000-11-07
DE19850739A1 (de) 2000-05-11
ATE239561T1 (de) 2003-05-15

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