EP0313516B1 - Dispositif et méthode pour refroidir des cylindres ou des rouleaux - Google Patents

Dispositif et méthode pour refroidir des cylindres ou des rouleaux Download PDF

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Publication number
EP0313516B1
EP0313516B1 EP88810680A EP88810680A EP0313516B1 EP 0313516 B1 EP0313516 B1 EP 0313516B1 EP 88810680 A EP88810680 A EP 88810680A EP 88810680 A EP88810680 A EP 88810680A EP 0313516 B1 EP0313516 B1 EP 0313516B1
Authority
EP
European Patent Office
Prior art keywords
roll
cooling medium
rolls
hood
roll surface
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
EP88810680A
Other languages
German (de)
English (en)
Other versions
EP0313516A1 (fr
Inventor
Bruno Frischknecht
Rudolf Roder
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.)
LAUENER ENGINEERING AG
Original Assignee
Lauener Engineering 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 Lauener Engineering AG filed Critical Lauener Engineering AG
Priority to AT88810680T priority Critical patent/ATE74807T1/de
Publication of EP0313516A1 publication Critical patent/EP0313516A1/fr
Application granted granted Critical
Publication of EP0313516B1 publication Critical patent/EP0313516B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B27/00Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/06Lubricating, cooling or heating rolls
    • B21B27/10Lubricating, cooling or heating rolls externally
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B27/00Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/06Lubricating, cooling or heating rolls
    • B21B27/08Lubricating, cooling or heating rolls internally
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B28/00Maintaining rolls or rolling equipment in effective condition
    • B21B28/02Maintaining rolls in effective condition, e.g. reconditioning
    • B21B28/04Maintaining rolls in effective condition, e.g. reconditioning while in use, e.g. polishing or grinding while the rolls are in their stands
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0637Accessories therefor
    • B22D11/068Accessories therefor for cooling the cast product during its passage through the mould surfaces
    • B22D11/0682Accessories therefor for cooling the cast product during its passage through the mould surfaces by cooling the casting wheel
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B27/00Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/06Lubricating, cooling or heating rolls
    • B21B27/08Lubricating, cooling or heating rolls internally
    • B21B2027/083Lubricating, cooling or heating rolls internally cooling internally
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B27/00Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/02Shape or construction of rolls
    • B21B27/03Sleeved rolls

Definitions

  • the invention relates to a device and a method for cooling rolls according to the preamble of patent claims 1 and 7.
  • the casting mold is essentially formed by the casting gap between the rolls and by side end walls.
  • the action time of the rollers is relatively short, a large amount of heat has to be dissipated over a short distance, in particular the heat of solidification, friction and / or deformation.
  • the rolls are cooled using special devices or processes, namely by injection from the outside or by internal cooling.
  • the specialist in strip casting systems prefers the internal cooling of the rolls, in which cooling channels are generally arranged between a roll core and a roll jacket, through which a cooling medium flows.
  • This cooling medium usually water
  • This cooling medium extracts the heat absorbed from the roll shell.
  • Great attention must be paid to the arrangement of the cooling ducts, since they are not only responsible for the amount of heat that is extracted from the material to be cooled, but can also determine the shape or dimensions of the roller itself during operation.
  • Will a roller along its length or cooled to different extents stresses arise due to different thermal expansion. Among other things, this leads to a different deflection of the roll, which has a negative effect on the quality of the rolling stock.
  • the uniform or pre-programmed cooling of the casting material lengthways and crossways must be given the greatest attention.
  • An advantage of all known embodiments of the internal cooling is that the contact of water with the rolling stock is ruled out beforehand, which can be particularly important in the case of roll casting. For example, when aluminum is cast, contact with water leads to a violent reaction which leaves marks on the surface of the rolling stock or can even lead to accidents.
  • a roll with a cooling or heating device for the roll surface is known.
  • This apparatus has one or more chambers which are open against the roll surface.
  • the chambers have a substantially square cross section.
  • a fluid is introduced through the inlet channels.
  • Turbulence forms in the chambers during the actuation of the roller in question. This turbulence causes the fluid to remain in the chambers for a longer period of time and thus to achieve a greater cooling or heating effect. Although this turbulence increases efficiency, this system is sufficient, among other things. not for efficient casting rolls. New materials and high production rates also require increased heat dissipation with low material stress.
  • JP-A 57-177863 describes a device for cooling the outside of a roll of a roll caster for vertically cast known thin bands.
  • Spray nozzles for water and air supply nozzles are arranged in a hood arranged along the circumferential surface of the roller after the roll gap.
  • Scraper devices and compressed air prevent water residues from escaping from the hood and thus prevent water from coming into contact with the molten metal.
  • a suction device for the cooling medium is not provided.
  • separating plates arranged adjacent to the side walls of the hood are pressed onto the roller by means of spring force to prevent leakage.
  • the inventors have set themselves the task of creating a device and a method of the type described in JP-A 57-177863, which can apply the advantages of effective external cooling with higher efficiency, but it should be worked with simple means and - how for internal cooling - there is no impairment of the cast or rolled strip.
  • the terminal means for removing the cooling medium ensure that no liquid cooling medium reaches the cast or rolled strip. This is of fundamental importance, in particular when strip casting, with or without plating strips.
  • the end of the hood facing away from the roll gap is preferably designed as a drying chamber, with e.g. warm or cold drying air can be used.
  • the hoods can be followed by a cleaning device, in particular a brush or a bar, which acts on the roller surface.
  • a spray device for applying a separating and / or lubricant preferably a size or a rolling oil
  • the size can e.g. a graphite suspension.
  • the roll geometry and the strip profile transverse to the rolling direction can be influenced by the zone cooling by dividing the hoods by radial partitions.
  • the chambers formed in this way can contain different amounts of cooling medium, cooling media with different heat capacity and / or cooling media are supplied at different temperatures.
  • the method according to the invention for operating a device is characterized in that the roll surface is cooled with increasing intensity in the direction pointing away from the roll gap.
  • the externally cooled rollers can additionally be internally cooled, with the process being carried out in a closed circuit in a known manner.
  • the release agent can be added to the coolant and applied together with it.
  • the plant for casting aluminum shown in FIG. 1 comprises two rollers 10, 12 which rotate in the direction of the arrows 14, 16.
  • the liquid metal 18 is fed into a casting trough 20 and flows into the roll gap 26 via a casting nozzle 24 carried by a nozzle holder 22.
  • each roller 10, 12 is partially covered with a device for cooling the rollers extending from the area of the roller gap 26.
  • This device essentially consists of a hood 30 with a combination of spray nozzles 32 for the cooling medium 56 and suction elements 34 and a drying chamber 36, all of which extend at least over the entire length of the rollers.
  • the suction elements 34 are designed as strips which are U-shaped in cross section and open towards the roller surface 28 and which are closed laterally.
  • the suction connection 38 opens into a peripheral jacket space 42, which is separated by an intermediate wall 40, in which the suction negative pressure is generated and in which the cooling medium, in particular water, which is drawn off collects and through drain pipe, not shown, is discharged.
  • the supply lines 44 to the spray nozzles 32 pass through the jacket space 42.
  • the supply of cooling medium to these supply lines takes place individually through one or common lines (not shown).
  • the device for cooling rolls shown in FIG. 1 with alternating spray nozzles and suction elements draws a lot of energy from the roll surface 28.
  • the effective sealing also ensures that no cooling medium, in particular water, comes into contact with the metal strip 52, which in the present case is made of aluminum.
  • the cooling medium for example water, a rolling oil, an emulsion or a suspension
  • the cooling medium can be fed through all nozzles 32 in the same composition, the same amount and at the same temperature.
  • the parameters can also be freely combined with one another in such a way that the intensity of the cooling increases in the direction of the arrows 14, 16.
  • the cleaning brush 54 does not remove or only partially removes the release agent applied with the cooling medium 56; rather, it is distributed regularly.
  • the device for cooling rolls shown in FIG. 3 comprises a hood 30 with negative pressure and a jacket space 42 separated by an intermediate wall 40, in which the suction nozzle 38 of the suction elements 34 open.
  • a mixture of water and air is fed as cooling medium 56 into the two lower feed lines 44, and only water into the two upper feed lines 44.
  • the roller surface 28 thus becomes more distant from the nip Towards first gently, then cooled more abruptly.
  • the water supplied by the upper spray nozzles 32 is removed by the suction elements 34, the water in the lowermost spray nozzle 32 by a scraper 58 from the roller surface 28 and fed into the jacket space 42, from where it flows through an outlet 60.
  • Compressed air is supplied through terminal compressed air pipes 65 with nozzles 63 and the roller surface 28 is completely dried.
  • the roller 10, 12 shown in Fig. 4 for strip casting of metals is formed in two parts. It consists of a roller core 66 and a roller jacket 68.
  • the cooling medium is supplied or removed via the roller neck 70, through bores 72. In a closed circuit, the cooling medium is brought radially into the surface area, where it is guided into circumferential cooling grooves 74 in the roller core 66, which are delimited by the roller jacket 68.
  • the cast tape is labeled 76.
  • cooling grooves 78 run in the axial direction according to FIG. 5 and work in the counterflow principle.
  • the cooling medium is brought into the roll neck 70 in a pipe 80 and flows off in an annular space 82 delimited by this pipe 80 and a coaxial bore in the roll neck 70.
  • FIGS. 4 and 5 are known per se; they document, for example, usable exemplary embodiments of internally cooled rollers with the external cooling according to the invention.
  • the hoods 30 shown in FIG. 6 are designed as zone coolers, they subdivide the hood in the axial direction into the chambers 1-16.
  • the cooling medium can be fed separately to each of the 16 chambers. This allows the temperature profile to be influenced in the axial direction. Because a temperature profile the roll diameter changed accordingly, the strip profile can be influenced transversely to the rolling or casting direction with the zone cooling shown. This type of strip influencing is known per se in rolling mills, but it corresponds to external cooling without sealing.
  • the effect of the cooling medium is varied by regulating the amount, the temperature and / or at most the heat capacity of the coolant. 6 also shows that the cleaning brush 54 can also be arranged in front of the drying chamber 36.
  • the device according to the invention and the method for cooling rolls are primarily used for roll casting, for dissipating the heat of solidification, and for rolling metals, for dissipating the heat of deformation and friction.
  • the device and the method can also be used in similar systems for processing non-metallic materials, e.g. Plastics, paper, rubber, etc. are used.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Continuous Casting (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Rolls And Other Rotary Bodies (AREA)

Claims (10)

1. Dispositif pour refroidir des cylindres ou des rouleaux (10, 12), en particulier dans la coulée en continu de feuillards et dans le laminage de métaux, dans lequel les cylindres (10, 12) sont recouverts chacun d'un capot (30) obturé contre le cylindre, s'étendant, à partir de la zone de l'ouverture de laminage (26), sur une partie de la surface de cylindre (28), dans lequel sont prévus des moyens (32, 44) pour amener un fluide de refroidissement (56) sur des parties de la surface de cylindre, se présentant sous forme de dispositifs de pulvérisation (32) s'étendant, à l'endroit des capots (30), plusieurs fois, dans le sens axial, sur toute la longueur de cylindre, et des moyens pour éliminer le fluide de refroidissement (56), ainsi qu'un dispositif d'écoulement ou de succion du fluide de refroidissement liquide (56) s'accumulant chaque fois dans la partie inférieure du capot (30), caractérisé en ce que les moyens (34, 58, 63) pour éliminer ce fluide de refroidissement (56) de la surface de cylindre (28) sont disposés en alternance, individuellement ou en groupes, avec des dispositifs de pulvérisation (32), avec des moyens (34, 58, 63) pour éliminer le fluide de refroidissement (56) disposés au début et à la fin, dans le sens périphérique.
2. Dispositif suivant la revendication 1, caractérisé en ce que les moyens pour éliminer le fluide de refroidissement liquide (56) de la surface de cylindre (28) sont des éléments de succion (34), des racleurs (58), des tuyères à air comprimé et/ou au moins une fente à air comprimé (63) fermés latéralement, s'étendant, à partir de la surface de cylindre (28) dans le sens longitudinal des cylindres (10, 12), se présentant en section en forme de "U".
3. Dispositif suivant la revendication 1 ou 2, caractérisé en ce que l'extrémité des capots (30) éloignée de l'ouverture de laminage (26) se présente sous forme de chambre de séchage (36) ouverte du côté du cylindre.
4. Dispositif suivant l'une des revendications 1 à 3, caractérisé en ce qu'après les capots (30), dans le sens de rotation (14, 16) des cylindres (10, 12), est disposé un dispositif de nettoyage, de préférence une brosse (54) ou une poutre (46), agissant sur la surface de cylindre (28).
5. Dispositif suivant l'une des revendications 1 à 4, caractérisé en ce qu'après le capot (30) ou la brosse (54) ou la poutre (46), dans le sens de rotation (14, 16) des cylindres (10, 12), est disposé un dispositif de pulvérisation (50) pour l'application d'un anti-adhérent et/ou lubrifiant, de préférence un enduit noir ou une huile pour cylindres.
6. Dispositif suivant l'une des revendications 1 à 5, caractérisé en ce que les capots (30) sont subdivisés dans le sens radial, de préférence, en au moins trois chambres.
7. Méthode pour l'exploitation d'un dispositif pour refroidir des cylindres ou rouleaux (10, 12), en particulier dans la coulée en continu de feuillards et dans le laminage de métaux, dans lequel les cylindres (10, 12) sont recouverts chacun d'un capot (30) obturé contre le cylindre, s'étendant, à partir de la zone de l'ouverture de laminage (26), sur une partie de la surface de cylindre (28), dans lequel sont prévus des moyens (32, 44) pour amener un fluide de refroidissement (56) sur des parties de la surface de cylindre, se présentant sous forme de dispositifs de pulvérisation (32) s'étendant, à l'endroit des capots (30), plusieurs fois, dans le sens axial, sur toute la longueur de cylindre, et des moyens pour éliminer le fluide de refroidissement (56), ainsi qu'un dispositif d'écoulement ou de succion du fluide de refroidissement liquide (56) s'accumulant chaque fois dans la partie inférieure du capot (30), caractérisée en ce que la surface de cylindre (28) est refroidie avec une intensité croissante dans le sens s'éloignant de l'ouverture de laminage (26).
8. Méthode suivant la revendication 7, caractérisée en ce qu'il est pulvérisé une quantité croissante de fluide de refroidissement (56) et/ou du fluide de refroidissement à capacité calorifique croissante et/ou du fluide de refroidissement à température décroissante dans le sens s'éloignant de l'ouverture de laminage (28).
9. Méthode suivant la revendication 7 ou 8, caractérisée en ce qu'il est utilisé un mélange de pulvérisation air-eau, de l'eau et de l'air de séchage dans le sens s'éloignant de l'ouverture de laminage (28).
10. Méthode suivant l'une des revendications 7 à 9, caractérisée en ce que les cylindres (10, 12) sont également refroidis intérieurement.
EP88810680A 1987-10-23 1988-10-03 Dispositif et méthode pour refroidir des cylindres ou des rouleaux Expired - Lifetime EP0313516B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88810680T ATE74807T1 (de) 1987-10-23 1988-10-03 Vorrichtung und verfahren zum kuehlen von walzen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4167/87A CH675974A5 (fr) 1987-10-23 1987-10-23
CH4167/87 1987-10-23

Publications (2)

Publication Number Publication Date
EP0313516A1 EP0313516A1 (fr) 1989-04-26
EP0313516B1 true EP0313516B1 (fr) 1992-04-15

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Family Applications (1)

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EP88810680A Expired - Lifetime EP0313516B1 (fr) 1987-10-23 1988-10-03 Dispositif et méthode pour refroidir des cylindres ou des rouleaux

Country Status (6)

Country Link
US (1) US4934444A (fr)
EP (1) EP0313516B1 (fr)
AT (1) ATE74807T1 (fr)
BR (1) BR8801801A (fr)
CH (1) CH675974A5 (fr)
DE (1) DE3870145D1 (fr)

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CN101912881A (zh) * 2010-07-27 2010-12-15 大连华锐股份有限公司 轧机轧辊盒式分段冷却装置
DE102012101474A1 (de) * 2012-02-23 2013-08-29 Benteler Automobiltechnik Gmbh Verfahren zur Herstellung von Metallbauteilen sowie Vorrichtung zur Durchführung des Verfahrens

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JP6194874B2 (ja) * 2014-12-08 2017-09-13 スターライト工業株式会社 製鋼用メンテナンスワイパー
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CN108421828A (zh) * 2018-05-16 2018-08-21 嘉兴市乍浦杭湾重型机械有限公司 一种轧棍冷却装置锻件
MX2020013171A (es) 2018-06-13 2021-02-18 Novelis Inc Sistemas y metodos para eliminar materiales viscosos en el procesamiento de articulos metalicos.
KR102224516B1 (ko) 2018-06-13 2021-03-08 노벨리스 인크. 롤 가공처리에서 점성 재료를 격납하기 위한 시스템 및 방법
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Cited By (2)

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Publication number Priority date Publication date Assignee Title
CN101912881A (zh) * 2010-07-27 2010-12-15 大连华锐股份有限公司 轧机轧辊盒式分段冷却装置
DE102012101474A1 (de) * 2012-02-23 2013-08-29 Benteler Automobiltechnik Gmbh Verfahren zur Herstellung von Metallbauteilen sowie Vorrichtung zur Durchführung des Verfahrens

Also Published As

Publication number Publication date
BR8801801A (pt) 1989-05-23
DE3870145D1 (de) 1992-05-21
ATE74807T1 (de) 1992-05-15
EP0313516A1 (fr) 1989-04-26
US4934444A (en) 1990-06-19
CH675974A5 (fr) 1990-11-30

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