EP0049425B1 - Procédé et dispositif pour laminer une bande sans tension - Google Patents

Procédé et dispositif pour laminer une bande sans tension Download PDF

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Publication number
EP0049425B1
EP0049425B1 EP81107609A EP81107609A EP0049425B1 EP 0049425 B1 EP0049425 B1 EP 0049425B1 EP 81107609 A EP81107609 A EP 81107609A EP 81107609 A EP81107609 A EP 81107609A EP 0049425 B1 EP0049425 B1 EP 0049425B1
Authority
EP
European Patent Office
Prior art keywords
liquid
arrangement according
cooling
valves
rolls
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
Application number
EP81107609A
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German (de)
English (en)
Other versions
EP0049425A3 (en
EP0049425A2 (fr
Inventor
Werner Schimion
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 Group GmbH
Original Assignee
SMS Schloemann Siemag AG
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
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Application filed by SMS Schloemann Siemag AG, SMS Demag AG filed Critical SMS Schloemann Siemag AG
Publication of EP0049425A2 publication Critical patent/EP0049425A2/fr
Publication of EP0049425A3 publication Critical patent/EP0049425A3/de
Application granted granted Critical
Publication of EP0049425B1 publication Critical patent/EP0049425B1/fr
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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
    • 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

Definitions

  • the invention relates to a method for rolling tension-free rolled strip by thermally influencing the diameter of the rolls by regulating their axial temperature distribution by applying a cooling, lubricating and / or cleaning liquid to the rolls, depending on behind the last stand in the transverse direction of the strip lying zones determined partial tensile stresses amount, pressure or temperature of the liquid can be changed by supplying at least the rolling stand arranged in front of the measuring point of the partial tensile stresses preferably adjustable in the application width per zone two liquids of different temperatures, the partial amounts of which can be regulated depending on the partial tensile force determined are, as well as an arrangement for performing the method.
  • the invention has for its object to provide a method of the type mentioned and an arrangement for its implementation, in which short control times can be achieved with low creation, maintenance and operating costs, and which are applicable to all working conditions under which in cold rolling stands used in the steel industry work.
  • the required basic amount of the liquid can be predetermined in each case, so that a perfect basic cooling and a completely sufficient lubrication are ensured and even in the case of the use of cleaning liquids their optimal effect is ensured.
  • Effective cooling is only introduced in addition, so that the consumption of more chilled liquid is reduced to a minimum.
  • the structure is relatively simple, since expensive mixing valves are dispensed with and simple control valves or even simple shut-off valves can replace them.
  • FIG. 1 is a perspective view of a cold-rolled strip 1 made of steel, which is guided between the work rolls 2 and 3 of a four-high cold stand, not shown, which are supported by support rolls 4 and 5.
  • the emerging cold rolled strip 1 runs with a small wrap angle around a strip tension measuring roller 6, which is able to detect the respective strip tension in axially successive jacket zones.
  • the measured values obtained are dissipated via the slip ring system 7.
  • the rollers 2 to 5 are assigned cooling bars 8 to 13 which are equipped with nozzles for dispensing liquid.
  • the division of these nozzles is adapted to that of the zones of the belt tension measuring roller 6, and in the exemplary embodiment the cooling bars each have 52 mm two nozzles which can be fed with liquid jointly and separately from the others.
  • the cooling beams 8 and 9 are assigned to the support rollers 4 and 5, and they are subjected to a constant liquid flow in an adjustable width and intensity in order to achieve a predetermined basic lubrication and cooling.
  • the cooling beams 10 and 11 of the work rolls 2 and 3 are subjected to an adjustable width and intensity.
  • the cooling beams 12 and 13 arranged upstream of the roll gap are subjected to a liquid whose temperature is lower than that supplied to the cooling beams 8 to 11, and their intensity is regulated in dependence on the tensile stresses determined for the zone in question in such a way that the Differences in tensile stresses in the different zones can be brought towards zero.
  • the supply with liquid takes place from two separate reservoirs 14 and 15, one of which contains liquid of the commonly used temperature, for example 45 °, while the reservoir 15 contains liquid whose temperature is lower than that of the liquid of the 14th example.
  • the temperature in the reservoir 15 can be 25 ° C.
  • the reservoirs are filled in the usual way by returning liquid, and under certain circumstances the reservoir 15 can be filled from the reservoir 14 via a cooler.
  • the supply of the chilled beams takes place via the reservoirs 14 and 15 downstream feed pumps 16 and 17, the delivery head of which can be set independently of consumption by downstream pressure relief valves 18 and 19.
  • Filters 20 and 21 can be arranged after the pressure relief valves, which filters can be bypassed in the event of clogging.
  • a cooler 22 is additionally shown, which may be able to effect additional cooling.
  • the feed pump 16 is followed by a plurality of valves 23 connected in parallel, the number of which corresponds to the number of zones of the chilled beams 8 to 11.
  • the first two and the last of the valves 23 are taken into account, and the corresponding downstream zones of the chilled beams 8 to 11 are fed in parallel.
  • the liquid discharged from the feed pump 17 is fed to a similar group of control valves 24, each of which feeds a zone of the cooling beams 12 and 13.
  • control valves 24 each of which feeds a zone of the cooling beams 12 and 13.
  • 31 valves are to be provided in accordance with the selected number of zones, of which only the two outermost are shown, and of which the one shown on the right feeds the corresponding outer zone of the cooling beams 12 and 13 in parallel.
  • the belt tension measuring roller 6 acts as an encoder for the control devices 26.
  • the sensor systems of the individual zones in the exemplary embodiment 31, are connected to corresponding inputs of the control device 26 via the wires of a measuring line 25.
  • the outputs of the individual regulators of the regulating device act via the cores of the actuating line 27 on the regulating valves 24 provided as actuators.
  • a fixed value regulation can be provided.
  • the individual controllers make sure that the sensors provided as sensors of the controlled system are arranged after the roll gap by approx. 1000 to 2000 mm, so that the controlled system is not only affected by the thermal inertia of the respective zone of the roll shell Use of liquid at a lower temperature and thus the increase in the temperature difference when the load is reduced is stressed, but in addition the running times become noticeably noticeable, due to the migration of the liquid-affected points of a roll into the roll gap and of the cold rolling strip emerging from the roll gap up to Tape tension measuring roller 6 result.
  • the control characteristic is to be designed in such a way that the build-up of control vibrations is avoided.
  • the invention shows ways of obtaining effective thermal crowning control by using a second liquid of lower temperature, which also takes effect relatively quickly and is therefore able to compensate for short-term voltage fluctuations. It has proven to be advantageous here that both the control device and the valves controlling the additional liquid flow as actuators have a relatively simple structure and thus enable an inexpensive system.
  • the display device usually provided for tension distribution in the transverse direction of the belt is also appropriately taken into account here, but is not shown in the exemplary embodiment to simplify the illustration.
  • the regulation can also be favorably influenced by the fact that 28 disturbance variables and 29 reference variables can be introduced via inputs.
  • the setting of the valves 23 can be carried out manually or controlled manually.
  • the basic cooling be adapted to the respective working conditions; the nozzles lying outside the width of the respectively rolled strip can be switched off, and the ones lying in the edge areas of the respective rolling program can be acted on in such a way that a favorable thermal setting of the crowning also results in the transition area to the unloaded roll shell.
  • zone deactivation can prevent the application of liquid to the side of their end face or in their position area in the case of axially displaced rolls.
  • the basic lubrication can be effected at the temperature recognized as advantageous, so that the viscosity of the oil used or emulsified can be set as optimally as the droplet size in emulsions.
  • Vegetable or animal fats can also be used at the appropriate temperature.
  • the temperature can also be set here in such a way that an optimal cleaning effect and thus extensive use of the cleaning fluid are achieved: the basic lubrication or cleaning has only a minor influence on the respective roller temperature; Rather, this is determined by the controllable addition of the low-temperature liquid, and here it is possible to make do with relatively little additional, colder liquid by using the higher temperature difference, supported by the application of the rollers over a larger circumferential area, so that result in cheaper operating costs.
  • the arrangement chosen in the recommended exemplary embodiment can be varied in many ways; for example, it is possible, as already mentioned, to arrange separate valves in front of the nozzles of a zone of the cooling beams and to dispense with zones of different cooling beams of the same type operating in parallel.
  • a simple and maintenance-friendly supply of the liquids can be achieved by the cooling beams being equipped with one or more liquid connections acting in parallel and the valves, carried by the cooling beams, being arranged directly upstream of the nozzles. They can be partially or completely embedded in the chilled beams. Strong current and thus pressure fluctuations that occur when the valves are switched can be reduced by adding additional pressure control valves upstream of the valves at a short distance or via short lines, or else the pressure control valves 18 and 19 shown in FIG.
  • valves 23 and control valves 24 directly upstream.
  • a further reduction of pressure changes occurring during switch-on and switch-off processes can be achieved by the pressure accumulators 30 and 31 being arranged upstream of the valves 23 and control valves 24, likewise via short lines and thus small liquid masses to be accelerated.
  • the liquid of the lower temperature can be obtained by a simple cooler.
  • a simple control and in particular a simple and therefore low-maintenance and inexpensive design of the control valves result if no analog control is carried out, but the controllers work according to the two-point or three-point principle.
  • the switch-on duration and / or the switch-on pauses can be varied such that the different cooling effects to be regulated result.
  • an average value of the individual zone measurements can be determined, which can be used as the setpoint of the control variable.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)

Claims (20)

1. Procédé de laminage d'une bande sans contraintes avec modification du dismètre des cylindres sous l,action de la chaleur par réglage de leur gradient de tempéra ture dans le sens de leur axe, les cylindres étant soumis à l'action d'un liquide réfrigérant, lubrifiant et/ ou nettoyant, le débit, la pression et la température du liquide étant modifiés en fonction des contraintes de traction partielles déterminées en arrière de la dernière cage dans des zones orientées transversalement par rapport à la bande, celle au moins des cages de là minoir qui est placée enavant de l'emplacement de mesure des contraintes de traction partielles recevant, de préférence d'une manière réglable sur la largeur d'action par zone, deux liquides à des températures différentes dont les débits partiels sont réglables en fonction de l'effort de traction partiel mesuré, caractérisé en ce que les cylindres reçoivent avec un débit constant réglable un premier liquide maintenu à une première température et en ce que le débir du deuxième liquide à plus basse température amené en supplément au moins aup oylindres de travail (2, 3) est réglable par zone en fonction de la contrainte de traction partielle mesurée.
2. Procédé selon la revendication 1, caractérisé en ce que le réglage est analogique.
3. Procédé selon la revendication 1, caractérisé par un réglage à commande à deux modes de fonctionnement avec phases d'enclenchement à impulsions.
4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que les cylindres (2 à 5) de la dernière cage au moins d'un train de laminoir sont soumis à l'action du liquide du côté de l'arrivée de la bande.
5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que l'amenée réglable par zone du liquide à plus basse température s'effectue à une distance angulaire de l'emprise plus grande que la distance angulaire de la zone dans laquelle arrive le premier liquide, à température plus élevée.
6. Dispositif pour l'application du procédé selon l'une des revendications 1 à 5, comprenant au moins une cage de laminoir aup cylindres de laquelle sont associées des buses qui sont montées dans des poutres de réfrigération et qui peuvent être alimentées en liquide et en arrière de laquelle se trouve un appareil qui détermine les tensions de la bande dans les différentes zones de la bande laminée à froid et qui agit sur des dispositifs de réglage en arrière desquels sont montés des appareils de réglage constitués par des soupapes, caractérisé en ce qu'aux cylindres (2 à 5) sont associées des barres de réfrigération (8 à 11) dont les buses sont alimentées par secteurs, d'une manière réglable, à partir d'un premier réservoir (14) qui contient un liquide à une première température, par l'intermédiaire de soupapes (23) et en ce qu'à chacun des cylindres de travail (3, 4) est associée au moins une autre poutre de réfrigération (12, 13) dont les buses sont alimentées par zones, par l'intermédiaire de soupapes de réglage (24) montées en arrière des dispositifs de réglage (26), et fournissant un liquide à plus basse température.
7. Dispositif selon les revendications 1 à 6, caractérisé en ce que la répartition par secteurs des buses de la poutre de réfrigération (10, 11) correspond à la répartition par zones des buses de la poutre de réfrigération (12 et 13).
8. Dispositif selon l'une des revendications 1 à 7, caractérisé en ce que les poutres de réfrigération (8 à 13) de la cage qui est la dernière dans le sens du passage de la bande sont montées du côté de l'arrivée de la bande.
9. Dispositif selon l'une des revendications 1 à 8, caractérisé en ce que les poutres de réfrigération (12, 13) alimentées en liquide à la température la plus basse sont placées à unedistance angulaire plus grande de l'emprise formée entre les cylindres de travail (2,3) que la distance angulaire des poutres (10, 11) alimentées en liquide à plus haute température.
10. Dispositif selon l'une des revendications 1 à 9, caractérisé en ce qu'à chaque cylindre de travail (2, 3) sont associées deux ou trois poutres de réfrigération (12, 13) pouvant amener avec un débit réglable du liquide à plus basse température.
11. Dispositif selon l'une des revendications 1 à 10, caractérisé en ce que les soupapes (23) et/ ou les soupapes de réglage (24) sont montées sur et/ ou dans les barres de réfrigération (8 à 13).
12. Dispositif selon l'une des revendications 1 à 11, caractérisé en ce que les régulateurs du dispositif de régulation (28) fonctionnent suivant le principe du réglage avec commande à deux ou trois modes de fonctionnement.
13. Dispositif selon l'une des revendications 1 à 12, caractérisé en ce que des soupapes (18, 19) de réglage de la pression sont montées à une faible distance en avant des soupapes (23) ou des soupapes de réglage (24).
14. Dispositif selon l'une des revendications 1 à 13, caractérisé en ce qu'aux soupapes (23) ou aux soupapes de réglage (24) sont associés des réservoirs à pression (30, 31 ) situés du côté entrée et reliés par de courtes canalisations.
15. Dispositif selon l'une des revendications 1 à 14, caractérisé en ce que le liquide de retour revient au réservoir (14) et que le liquide qui doit être amené à la température plus basse est prélevé dans ce réservoir.
16. Dispositif selon la revendication 15, caractérisé en ce que le liquide prélevé traverse un appareil réfrigérant.
17. Dispositif selon l'une des revendications 15 ou 16, caractérisé en ce que le liquide prélevé passe par un deuxième réservoir (15).
18. Dispositif selon la revendication 17, caractérisé en ce que le réservoir (15) comporte un dispositif de réfrigération.
19. Dispositif selon l'une des revendications 1 à 18, caractérisé en ce quedes cylindres de travail de l'avantdernière des cages situées enavant de l'appareil (6) qui fournit des informations et détermine les tensions de bande comportent au moins une poutre de réfrigération qui reçoit d'une manière réglable du liquide à plus basse température.
20. Dispositif selon la revendication 19, caractérisé en ce que le réglage du liquide de réfrigération des cylindres de travail de la cage s'effectue avec une caractéristique plus plate et/ ou une plus forte atténuation que celle des cylindres de travail (2, 3) situés immédiatement enavant de l'appareil (6) fournissant des informations.
EP81107609A 1980-10-04 1981-09-24 Procédé et dispositif pour laminer une bande sans tension Expired EP0049425B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3037584 1980-10-04
DE19803037584 DE3037584A1 (de) 1980-10-04 1980-10-04 Verfahren und anordnung zum walzen von spannungsfreiem walzband

Publications (3)

Publication Number Publication Date
EP0049425A2 EP0049425A2 (fr) 1982-04-14
EP0049425A3 EP0049425A3 (en) 1983-01-26
EP0049425B1 true EP0049425B1 (fr) 1986-03-19

Family

ID=6113623

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81107609A Expired EP0049425B1 (fr) 1980-10-04 1981-09-24 Procédé et dispositif pour laminer une bande sans tension

Country Status (3)

Country Link
EP (1) EP0049425B1 (fr)
JP (1) JPS5791803A (fr)
DE (2) DE3037584A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3419261C3 (de) * 1984-05-23 1994-12-15 Achenbach Buschhuetten Gmbh Walzenkühl- und/oder Schmiervorrichtung für Kaltbandwalzwerke, insbesondere Feinbandwalzwerke
JPS61165214A (ja) * 1984-11-14 1986-07-25 メジユアレツクス、コ−ポレ−シヨン シ−ト状金属形状制御方法及び装置
DE3523483A1 (de) * 1985-07-01 1987-01-08 Achenbach Buschhuetten Gmbh Walzenkuehl- und/oder schmiervorrichtung fuer kaltbandwalzwerke, insbesondere feinbandwalzwerke
DE3607527A1 (de) * 1986-03-07 1987-09-10 Achenbach Buschhuetten Gmbh Vorrichtung zum regeln der planheit und dicke von walzband in einem mehrwalzen-bandwalzgeruest
CN111974801A (zh) * 2020-08-13 2020-11-24 无锡市城南带钢有限公司 热轧带钢的生产方法

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2226500A (en) * 1935-05-09 1940-12-24 Edgar J Griffiths Method and apparatus for making sheet metal
US3225580A (en) * 1963-04-24 1965-12-28 United States Steel Corp Reduction of edge taper in strip rolling
DE1811238A1 (de) * 1968-11-27 1970-06-25 Inst Avtomatiki Einrichtung zur Regelung des Bandprofils des Walzgutes in Feinblech-Kaltwalzwerken
US3587265A (en) * 1969-01-03 1971-06-28 Alcan Res & Dev Automatic thermal crown control of strip mill rolls
US3616669A (en) * 1969-06-13 1971-11-02 United Eng Foundry Co Method of and apparatus for rolling flat strip
JPS499031B1 (fr) * 1970-12-22 1974-03-01
US3709012A (en) * 1971-01-04 1973-01-09 Nalco Chemical Co Hot rolling mill lubrication apparatus and process
JPS4893508A (fr) * 1972-03-10 1973-12-04
US3802237A (en) * 1972-05-26 1974-04-09 United States Steel Corp Localized strip shape control and display
SE7613004L (sv) * 1976-11-22 1978-05-23 Asea Ab Signalomvandling.
GB2012198B (en) * 1977-11-25 1982-01-06 Loewy Robertson Eng Co Ltd Rolling mills
NL7802440A (nl) * 1978-03-06 1979-09-10 Vaassen Aluminium Werkwijze voor het regelen van de vlakheid van koudgewalste walsplaten en folieen.
JPS55122609A (en) * 1979-03-14 1980-09-20 Sumitomo Metal Ind Ltd Controlling method for crown of work roll

Also Published As

Publication number Publication date
DE3037584A1 (de) 1982-05-19
JPH0355201B2 (fr) 1991-08-22
JPS5791803A (en) 1982-06-08
EP0049425A3 (en) 1983-01-26
DE3174134D1 (en) 1986-04-24
EP0049425A2 (fr) 1982-04-14

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