EP3670011B1 - Refroidissement de la bande métallique dans une cage de laminoir - Google Patents

Refroidissement de la bande métallique dans une cage de laminoir Download PDF

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Publication number
EP3670011B1
EP3670011B1 EP18215003.7A EP18215003A EP3670011B1 EP 3670011 B1 EP3670011 B1 EP 3670011B1 EP 18215003 A EP18215003 A EP 18215003A EP 3670011 B1 EP3670011 B1 EP 3670011B1
Authority
EP
European Patent Office
Prior art keywords
cooling installation
roll stand
cooling
liquid coolant
transportation direction
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.)
Active
Application number
EP18215003.7A
Other languages
German (de)
English (en)
Other versions
EP3670011A1 (fr
Inventor
Michael Krueckel
Thomas Lengauer
Bernd Linzer
Alois Seilinger
Michael Zahedi
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.)
Primetals Technologies Austria GmbH
Original Assignee
Primetals Technologies Austria GmbH
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 Primetals Technologies Austria GmbH filed Critical Primetals Technologies Austria GmbH
Priority to EP18215003.7A priority Critical patent/EP3670011B1/fr
Priority to CN201980085188.5A priority patent/CN113165037B/zh
Priority to PCT/EP2019/083474 priority patent/WO2020126473A1/fr
Publication of EP3670011A1 publication Critical patent/EP3670011A1/fr
Application granted granted Critical
Publication of EP3670011B1 publication Critical patent/EP3670011B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • B21B45/0233—Spray nozzles, Nozzle headers; Spray systems
    • 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
    • B21B1/24—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 in a continuous or semi-continuous process
    • 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
    • B21B2203/00—Auxiliary arrangements, devices or methods in combination with rolling mills or rolling methods
    • B21B2203/18—Rolls or rollers
    • B21B2203/187—Tilting rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2269/00—Roll bending or shifting
    • B21B2269/12—Axial shifting the rolls
    • B21B2269/14—Work rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/08—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts
    • 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
    • B21B45/0269—Cleaning
    • B21B45/0275—Cleaning devices
    • B21B45/0278—Cleaning devices removing liquids
    • B21B45/0281—Cleaning devices removing liquids removing coolants

Definitions

  • Such operating methods and the corresponding roll stands are generally known.
  • the first prior art mill stand coolers are used for cooling the work rolls of the stand.
  • Purely exemplary can on the DE 10 2009 040 876 A1 , which discloses a generic method and a generic device, and the EP 3 006 125 A1 to get expelled.
  • a cooling device which consists of one or more individually activated spray nozzles, via which specific points of the flat rolling stock or a slab, seen in the width direction of the flat rolling stock, can be cooled in a targeted manner in order to achieve temperature homogenization across the width.
  • This cooling device is not arranged in a roll stand.
  • a cooling device arranged in a roll stand is known, by means of which the work rolls of the roll stand can be cooled.
  • the cooling is spatially resolved as seen in the direction of the width of the flat rolling stock.
  • This cooling device can also be used to carry out locally resolved cooling of the work rolls, viewed in the direction of the width of the flat rolling stock.
  • the cooling device can be adjusted by means of a lever mechanism and a corresponding actuator or by means of two lever mechanisms and corresponding actuators, so that seen in the direction of transport of the rolling stock, the distance of the cooling device from the work rolls is adjustable.
  • the distance between the cooling device and the work rolls viewed in the transport direction of the rolling stock.
  • this roll stand is usually also the roll stand that performs the last rolling pass.
  • the period of time from leaving the last roll stand to the start of cooling in the cooling section is therefore very short.
  • the last rolling pass is often carried out by a roll stand other than the last roll stand in the rolling mill.
  • the flat rolling stock passes through the roll stands, which are arranged downstream of the roll stand that performs the last rolling pass, without forming.
  • the time span between the last rolling pass and the beginning of the cooling of the flat rolling stock in the cooling section increases simply because of the increased distance to a cooling section downstream of the rolling train.
  • the relatively thick, flat rolling stock usually runs out of the rolling stand that performs the last rolling pass at a relatively low speed.
  • the period of time between the last rolling pass and the start of cooling of the flat rolling stock in the cooling section increases even further. Due to the increased period of time, it may no longer be possible under certain circumstances to set certain desired material properties of the flat rolling stock.
  • the product mix that can be produced using the multi-stand rolling train and the downstream cooling section is therefore limited.
  • interstand cooling can be arranged between the individual roll stands of the multi-stand rolling train. It has already been proposed to treat these interstand cooling systems, insofar as they are arranged downstream of the roll stand performing the last rolling pass, as part of the cooling section downstream of the rolling train. As a result, cooling of the flat rolling stock can be started earlier.
  • the disadvantage of this procedure is that by means of the interstand cooling, seen in the direction of transport of the flat rolling stock, no homogeneous distribution of the cooling can be realized, but only selective cooling, for example every five or six meters.
  • the period of time that a certain section of the flat rolling stock needs from one of these interstand cooling systems to the next such interstand cooling system can be over 10 seconds for thick flat rolling stock.
  • usually only relatively small amounts of coolant can be applied to the flat rolling stock by means of the interstand cooling.
  • the cooling effected by the interstand cooling systems is therefore often insufficient in terms of scope.
  • EP 3 434 383 A1 In the older European patent application 17 182 794.2 (EP 3 434 383 A1 ) it is proposed to remove the work rolls from those roll stands that are downstream of the roll stand that performs the last rolling pass and instead to install cooling devices in these roll stands via the stand windows of the stand stands on the operator side and to use these cooling devices to cool the flat rolling stock in the area of these roll stands as well. This procedure already achieves significantly improved cooling.
  • the disadvantage is that the removal of the work rolls, the installation of the cooling devices and often also the connection of the cooling devices to the coolant supply cannot be carried out automatically.
  • the EP 3 434 383 A1 has not yet been published on the filing date of the present invention and is therefore not generally accessible prior art.
  • the object of the present invention is to create possibilities by means of which a flat rolling stock made of metal can be cooled in a roll stand in a simple, effective and inexpensive manner.
  • the corresponding rolling stand can already be used to cool the flat rolling stock.
  • the first cooling device required for this can be a permanent part of the roll stand. It therefore does not have to be installed and removed depending on the mode of operation of the roll stand. Rather, it need only be shifted between the retracted position and the advanced position.
  • the mode of operation of the roll stand in which the second flat rolled stock runs through the roll stand without being deformed, is of course only useful if the second flat rolled stock was previously rolled in another roll stand.
  • the roll stand is therefore part of a multi-stand rolling train, usually a finishing train.
  • the flat rolling stock is hot-rolled.
  • the flat rolling stock can be sheet metal. Usually it is a band.
  • the metal from which the flat rolling stock is made can be aluminum or copper, for example. Usually it is steel.
  • a liquid coolant is applied to the work rolls during the rolling of the first flat rolled stock.
  • the two cooling devices are preferably combined into one structural unit, so that when the first cooling device is moved, the second cooling device is also moved in the transport direction or against the transport direction. Compared to a configuration in which the second cooling device is present, but is not relocated together with the first cooling device, this configuration is structurally simpler to implement.
  • the work rolls can be exposed to a liquid coolant during the rolling of the first flat rolling stock, but this exposure does not take place by means of a different, second cooling device, but that the first cooling device is used for this purpose.
  • This configuration has the advantage that only the first cooling device is required, ie not both the first cooling device and the second cooling device.
  • the first cooling device can be turned from the first to the second rotary position, for example by means of a hydraulic rotary drive.
  • a hydraulic rotary drive for example, a hydraulic rotary drive, or a hydraulic rotary drive.
  • other configurations are also possible, for example corresponding guidance as part of the shifting.
  • the liquid coolant is supplied to the first cooling device at a first working pressure.
  • the liquid coolant is fed to the first cooling device at a second working pressure.
  • the second working pressure is preferably lower than the first working pressure.
  • the first working pressure can range between 10 bar and 13 bar, while the second working pressure can range between 2 bar and 5 bar.
  • the second working pressure is fixed.
  • the second working pressure can be set variably by means of an actuator.
  • the actuator can be a pressure reducing valve, for example.
  • a gaseous medium is preferably blown transversely onto the second flat rolled stock before and/or behind the first cooling device. This ensures a defined cooling effect.
  • the gaseous medium is usually only blown on top of the flat rolled stock. Although this is also possible for the underside of the flat rolling stock, it is not usually necessary.
  • the at least one line is preferably flexible.
  • the line provided the line is of sufficient length—can readily follow the displacement of the first cooling device from the retracted position into the advanced position.
  • the liquid coolant is preferably routed from the at least one line to the first cooling device via a rotary connection. As a result, the liquid coolant can be supplied to the first cooling device in the same way, regardless of whether the first cooling device is in the retracted position or in the advanced position.
  • the first cooling device is preferably displaced by means of an actuator designed as a hydraulic cylinder unit. This keeps the reliability and operational safety of the roll stand at a high level.
  • the first cooling device is preferably guided in a slotted guide during the displacement. As a result, it can easily be achieved that the first cooling device is positioned exactly in the retracted position and in the forward position.
  • the advantageous configurations of the roll stand correspond to the advantageous configurations of the operating method.
  • the advantages that can be achieved by the advantageous configurations of the roll stand are the same as with the advantageous configurations of the operating method.
  • a rolling train has several roll stands 1 .
  • a flat rolling stock 2 runs through the roll stands 1 in a transport direction x.
  • Each of the roll stands 1 therefore performs only a single roll pass on the flat rolling stock 2 .
  • the flat rolling stock 2 is rolled in the roll stands 1 .
  • the flat rolling stock 2 is usually a strip. In individual cases, however, it can also be a heavy plate.
  • the flat rolling stock 2 consists of metal, for example steel. However, it can also consist of another metal, for example copper or aluminum.
  • the rolling train has five roll stands 1 .
  • the number of roll stands 1 could also be larger or smaller.
  • configurations with four, six or seven roll stands 1 are also common.
  • the roll stands 1 are in FIG 1 additionally supplemented with a small letter a to e in order to be able to distinguish the first rolling stand 1a of the rolling train, the second rolling stand 1b of the rolling train, etc. from one another by means of their reference numbers if necessary.
  • each of the roll stands 1 has, as shown in FIG 2 (and also FIG 1 ) at least work rolls 3.
  • the work rolls 3 rotate about roll axes 4 during rolling.
  • the roll axes 4 run transversely to the transport direction x.
  • the roll stands 1 are often designed as so-called four-high stands. In this case, as shown in the FIG 1 and 2 in addition to the work rolls 3, back-up rolls 5 are also present. Sometimes the roll stands 1 are designed as so-called six-high stands. In this case, in addition to the work rolls 3 and the back-up rolls 5, there are intermediate rolls arranged between the work rolls 3 and the back-up rolls 5. This is not shown in the FIG.
  • the flat rolling stock 2 After rolling in the rolling train, the flat rolling stock 2 runs through a cooling section 6. In the cooling section 6, the flat rolling stock 2 is cooled. As a rule, the flat rolling stock 2 is acted upon in the cooling section 6 for cooling with a liquid cooling medium, usually water. After cooling--in the case of a strip--the flat rolling stock 2 is coiled up or--in the case of a heavy plate--put down and possibly stacked.
  • a liquid cooling medium usually water.
  • the roll stands 1 as shown in the 3 and 4 a drive-side stand 7 and an operator-side stand 8.
  • the work rolls 3 (usually including the associated chocks) can be removed from the respective roll stand 1 .
  • the removal usually takes place through the frame window 9 of the operator-side stand 8. In this case, the removal takes place transversely to the transport direction x, namely parallel to the roll axes 4.
  • the same generally applies to the back-up rolls 5 and—if present—also the intermediate rolls. This procedure is well known and familiar to those skilled in the art and therefore does not need to be explained in detail.
  • the work rolls 3 are installed in all rolling stands 1.
  • the further flat rolling stock 10 can be a rolling stock separate from the flat rolling stock 2 mentioned first. Alternatively, they can be sections of one and the same metal strand. Whether one or the other situation is present is within the scope of the present invention of secondary importance. What is decisive is that the final thickness d2 of the additional rolling stock 10 is greater than the final thickness d1 of the flat rolling stock 2 .
  • the other flat rolling stock 10 as shown in 5 is rolled only in the front roll stands 1 of the rolling train.
  • the further flat rolling stock 10 passes through the rear rolling stands 1 of the rolling train without being rolled there. It thus passes through the rear roll stands 1 without being deformed.
  • the cooling section 6 is in 5 not shown. However, it is still there.
  • the further flat rolling stock 10 is only rolled in the roll stands 1a and 1b, while it passes through the roll stands 1c, 1d and 1e without being deformed.
  • the further flat rolling stock 10 it would also be possible for the further flat rolling stock 10 to be rolled, for example, in the roll stands 1a, 1b and 1c and only to pass through the roll stands 1d and 1e without being deformed.
  • the further flat rolling stock 10 it would also be possible for the further flat rolling stock 10 to be rolled only in the roll stand 1a and to run through the roll stands 1b to 1e without being deformed. Similar configurations result with a smaller or larger number of roll stands 1 .
  • the further flat rolling stock 10 is rolled in the first roll stand 1a and not rolled in the last roll stand 1e. There is still only a single transition from rolling to non-rolling in the rolling mill.
  • the roll stand 1c is a flat rolling stock - for example, as before in connection with FIG 1 explains the flat rolling stock 2 - is to be rolled in accordance with the illustration in 6 the work rolls 3 are installed in the corresponding roll stand 1c.
  • a first cooling device 11 of the roll stand 1c as shown in FIG 6 held in a position in which the first cooling device 11 is spaced from the work rolls 3 as seen in the transport direction x.
  • the first cooling device 11 is therefore arranged in the roll stand 1c, but it is arranged in such a way that it does not impede the rolling.
  • the position just explained is referred to below as the retracted position of the first cooling device 11 .
  • the work rolls 3 are first removed from the roll stand 1c.
  • the expansion takes place, as already mentioned and in the 3 and 4 indicated by corresponding arrows, usually transversely to the direction of transport x and parallel to the roll axes 4 through the stand window 9 of the operator-side stand 8.
  • the back-up rolls 5 are usually raised.
  • FIG 7 shows the corresponding state in which the work rolls 3 are removed from the roll stand 1c and the back-up rolls 5 are raised.
  • the first cooling device 11 in the transport direction x or against the Transport direction x shifted. Relocation is in 8 indicated by corresponding arrows. During the shifting, the first cooling device 11 can be guided, for example, in a slotted guide of the roll stand 1c.
  • the relocation is usually carried out by means of a corresponding actuator 12.
  • the actuator 12 can, as shown in 8 be designed as a hydraulic cylinder unit.
  • the first cooling device 11 is in a position other than the retracted position. This other position is hereinafter referred to as the advanced position.
  • the first cooling device 11 is as shown in FIG 8 arranged in the advanced position in an area in which previously - before removing the work rolls 3 - the work rolls 3 were arranged.
  • 9 also shows the corresponding state in which the work rolls 3 are removed from the roll stand 1c and the first cooling device 11 is in its advanced position.
  • first cooling device 11 is displaced in the transport direction x or against the transport direction x depends on whether the first cooling device 11 is located in front of or behind the work rolls 3 in the transport direction x in its retracted position. If the first cooling device 11 is located in front of the work rolls 3, ie on the entry side of the roll stand 1c, it is shifted in the transport direction x. If the first cooling device 11 is located behind the work rolls 3, ie on the outlet side of the roll stand 1c, it is displaced counter to the transport direction x.
  • displacement in the transport direction x is not intended to mean that displacement is forced to take place exactly parallel to the transport direction x. It is sufficient that an appreciable component of the displacement is directed in the transport direction x.
  • displacement can take place parallel to a scraper plate 13, by means of which a liquid coolant is scraped off one of the work rolls 3 when the work rolls 3 are installed.
  • the further flat rolling stock 10 runs through the roll stand 1c.
  • the flat rolling stock 10 passes through the roll stand 1c without being deformed.
  • the first cooling device 11 which is now in the advanced position, as shown in 8 the further flat rolling stock 10 is subjected to a liquid coolant 14 .
  • the liquid coolant 14 is typically water or substantially water based.
  • the liquid coolant 14 is fed to the first cooling device 11 via at least one line 15 .
  • the line 15 can be a rigid line, for example a telescopically extendable tube. In many cases, however, line 15 is as shown in 10 a flexible line, i.e. a kind of hose. 10 shows the first cooling device 11 in solid lines in its retracted position and in dashed lines in the advanced position and additionally in an intermediate position which the first cooling device 11 briefly assumes when transferring from the retracted position to the advanced position.
  • the work rolls 3 are also exposed to the liquid coolant 14 if they are installed in the roll stand 1c and consequently a flat rolling stock (for example the rolling stock 2) is rolled in the roll stand 1c.
  • the application serves in particular for cooling, but under certain circumstances also for adjusting the contour of the work rolls 3 and thus the contour of the roll gap formed by the work rolls 3 . It is as shown in 8 It is possible for the work rolls 3 to be acted upon by means of the first cooling device 11 .
  • the first cooling device 11 is in the retracted position.
  • outlet nozzles 16 are preferably positioned as shown in FIG 8 oriented in such a way that the liquid coolant 14, seen from the first cooling device 11, spreads out essentially orthogonally to the transport direction x onto the corresponding flat rolling stock 10.
  • the outlet nozzles 16 are therefore in the advanced position of the first cooling device 11 depending on whether the liquid coolant 14 of is applied to the corresponding flat rolling stock 10 from above or below, directed downwards or upwards.
  • minor deviations from the vertical are possible.
  • the outlet nozzles 16 to discharge the liquid coolant 14 in a fan-like manner.
  • the application orthogonal to the transport direction x refers to the mean propagation direction of the coolant 14 discharged from the respective outlet nozzle 16.
  • the outlet nozzles 16 are positioned as shown in FIG 8 preferably oriented in such a way that the liquid coolant 14, viewed from the first cooling device 11, spreads with a component in or counter to the transport direction x onto one of the work rolls 3.
  • the outlet nozzles 16 are thus oriented accordingly in the retracted position of the first cooling device 11 depending on whether the liquid coolant 14 is applied to one of the work rolls 3 on the inlet side or outlet side. Certain deviations from the transport direction x are certainly possible. In particular, a delivery can take place essentially parallel to the scraper plates 13 .
  • the component in the transport direction x or counter to the transport direction x is greater than the component orthogonal to the transport direction x. It is also possible and also quite common for the outlet nozzles 16 to discharge the liquid coolant 14 in a fan-like manner. In this case, the application with a component in the transport direction x or counter to the transport direction x relates to the mean propagation direction of the coolant 14 discharged from the respective outlet nozzle 16.
  • the first cooling device 11 is oriented in a first rotary position in the retracted position and in the advanced position in relation to an axis 17 which is related to the first cooling device 11 and runs parallel to the roller axes 4 a second rotational position oriented.
  • the corresponding orientations are from the 6 , 8th , 9 and 10 apparent.
  • the rotation of the first cooling device 11 from the first to the second rotational position can, for example, by a corresponding Configuration of the link guide are effected, which is used in the context of relocating the first cooling device 11.
  • no further actuator is required in addition to actuator 12 for twisting.
  • the liquid coolant 14 is generally supplied to the first cooling device 11 at a relatively high working pressure p1.
  • the working pressure p1 - hereinafter referred to as the first working pressure - is usually in the range between 10 bar and 13 bar.
  • the liquid coolant 14 is generally supplied to the first cooling device 11 at a relatively low working pressure p2.
  • the working pressure p2 - hereinafter referred to as the second working pressure - is lower than the first working pressure p1. It is usually in the range between 2 bar and 5 bar, in particular around 3 bar to 4 bar.
  • the first working pressure p1 is usually fixed.
  • the second working pressure p2 can also be fixed. Alternatively, it can be variably adjusted by means of an actuator. Like other control elements such as valves, the actuator can be arranged outside of the roll stand 1c.
  • the roll stand 1c comprises as shown in FIGS 6 to 9 not just a single first cooling device 11, but four such cooling devices 11, namely one first cooling device each 11 on the inlet side in front of the upper work roll 3, a first cooling device 11 on the inlet side in front of the lower work roll 3, a first cooling device 11 on the outlet side in front of the upper work roll 3 and a first cooling device 11 on the outlet side in front of the lower work roll 3.
  • the above statements therefore apply to each of the first Cooling devices 11.
  • the liquid coolant 14 can easily fall off the flat rolled stock 10 and drip off.
  • the liquid coolant 14 can easily fall off the flat rolled stock 10 and drip off.
  • the liquid coolant 14 can happen that the liquid coolant 14 remains on the flat rolling stock 10 .
  • this is disadvantageous because it means that a defined cooling effect is no longer guaranteed.
  • This is also disadvantageous because it means that the defined application of a further coolant by a further cooling device is no longer guaranteed.
  • This further cooling device can be, for example, a first cooling device of a subsequent roll stand 1d. It can also be an interstand cooling system that is arranged between these two roll stands 1c, 1d.
  • the roll stand 1c can be installed as shown in FIG 8 have a transverse blow-off device 18 .
  • the transverse blow-off device 18 When the first cooling device 11 is in the forward position, the transverse blow-off device 18 is arranged in front of or behind the first cooling device 11 as viewed in the transport direction x. A gaseous medium 19 is blown transversely onto the flat rolling stock 10 in front of or behind the first cooling device 11 by means of the transverse blow-off device 18 - depending on the point at which the transverse blow-off device 18 is arranged.
  • the liquid coolant 14 applied to the surface of the flat rolled stock 10 by the first cooling device 11 is removed from the surface of the flat rolled stock 10 .
  • the gaseous medium 19 can be air. Alternatively, it can be an inert gas, for example nitrogen or argon.
  • the blowing of the gaseous medium 19 is taken as a rule only for the upper side of the flat rolling stock 10 . However, it can also be implemented for the underside of the flat rolling stock 10 .
  • the first cooling device 11 is used both to act on the flat rolling stock 10 and (when rolling the flat rolling stock 2) to act on the work rolls 3 .
  • the first cooling device 11 it is alternatively possible for the first cooling device 11 to be used exclusively for impinging on the flat rolling stock 10 .
  • the first cooling device 11 is deactivated when the flat rolling stock 2 is being rolled.
  • the roll stand 1c generally has a second cooling device 20 in this case for loading the work rolls 3 (that is, when the flat rolling stock 2 is being rolled). If the roll stand 1c has a plurality of first cooling devices 11, each of the first cooling devices 11 generally also has its own second cooling device 20.
  • the roll stand 1c of 12 and 13 in addition to the first cooling device 11, the second cooling device 20.
  • a liquid coolant 14 is applied to the work rolls 3 during the rolling of the flat rolled stock 2 by means of the second cooling device 20 .
  • the work rolls 3 are installed specifically in the rolling stand 1c.
  • first cooling device 11 In principle, only the first cooling device 11 must be able to be shifted from the retracted position to the advanced position. This is not necessary for the second cooling device 20 .
  • the first cooling device 11 and the second cooling device 20 are often as shown in FIGS 12 and 13 but combined into one unit. In this case, when the first cooling device 11 is moved in the transport direction x or opposite to the transport direction x, the second cooling device 20 is also moved in the transport direction x or opposite to the transport direction x.
  • the present invention also has other advantages. For example, it is possible to consider and model the cooling of the flat rolling stock 10 in the rear rolling stands 1 of the rolling train and the cooling in the downstream cooling section 6 as a whole. Such procedures are known for the inclusion of interstand cooling as such. If available, the interstand cooling systems can also be included in the cooling of the flat rolling stock 10, as is also the case in the prior art. Some flat rolling stock 10 can even be completely cooled inside the rolling train.
  • the configurations that are already known in the prior art for cooling the work rolls 3 can also be adopted.
  • Such a spatially resolved loading, viewed in the width direction of the flat rolling stock 10, is for loading the work rolls 3, for example, from the one mentioned at the outset WO 2006/076 777 A1 and those also mentioned at the beginning US 2001/0 007 200 A1 known.
  • the already cramped installation space of the roll stands 1 can be used efficiently. Additional elements - for example, additional piping within the respective roll stand 1 - are not required.

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

Claims (22)

  1. Procédé d'exploitation pour une cage de laminage (1c),
    - un premier produit laminé plat (2) en métal traversant tout d'abord la cage de laminage (1c) dans une direction de transport (x) et étant laminé lors de la traversée de la cage de laminage (1c) au moyen de cylindres de travail (3) montés dans la cage de laminage (1c), les cylindres de travail (3) tournant autour d'axes de cylindre (4) s'étendant transversalement à la direction de transport (x) pendant le laminage du premier produit laminé plat (2),
    - pendant le laminage du premier produit laminé plat (2), un premier dispositif de refroidissement (11) agencé dans la cage de laminage (1c) étant maintenu dans une position rétractée, dans laquelle le premier dispositif de refroidissement (11), tel que vu dans la direction de transport (x), est espacé des cylindres de travail (3),
    - les cylindres de travail (3) étant ensuite démontés de la cage de laminage (1c),
    caractérisé en ce que
    - après le démontage des cylindres de travail (3), le premier dispositif de refroidissement (11) est déplacé dans une position avancée dans la direction de transport (x) ou à l'encontre de la direction de transport (x), de telle sorte que le premier dispositif de refroidissement (11) est agencé dans la position avancée dans une zone dans laquelle les cylindres de travail (3) étaient agencés auparavant, et
    - en ce qu'un deuxième produit laminé plat (10) en métal traverse enfin la cage de laminage (1c) sans se déformer dans la direction de transport (x) et, lors de la traversée de la cage de laminage (1c), est sollicité, au moyen du premier dispositif de refroidissement (11) se trouvant dans la position avancée, avec un agent de refroidissement liquide (14) amené au premier dispositif de refroidissement (11) par le biais d'au moins une conduite (15).
  2. Procédé d'exploitation selon la revendication 1, caractérisé en ce que les cylindres de travail (3) sont sollicités avec un agent de refroidissement liquide (14) au moyen d'un deuxième dispositif de refroidissement (20) pendant le laminage du premier produit laminé plat (2).
  3. Procédé d'exploitation selon la revendication 2, caractérisé en ce que le premier dispositif de refroidissement (11) et le deuxième dispositif de refroidissement (20) sont combinés en une unité de construction, de telle sorte que lors du déplacement du premier dispositif de refroidissement (11), le deuxième dispositif de refroidissement (22) est également déplacé dans la direction de transport (x) ou à l'encontre de la direction de transport (x).
  4. Procédé d'exploitation selon la revendication 1, caractérisé en ce que les cylindres de travail (3) sont sollicités avec un agent de refroidissement liquide (14) au moyen du premier dispositif de refroidissement (11) pendant le laminage du premier produit laminé plat (2).
  5. Procédé d'exploitation selon la revendication 4, caractérisé en ce que
    - le premier dispositif de refroidissement (11) est orienté dans une première position de rotation au regard d'un axe (17) s'étendant parallèlement aux axes de cylindre (6) par rapport au premier dispositif de refroidissement (11) dans la position rétractée et est orienté dans une deuxième position de rotation dans la position avancée,
    - tel que vu depuis le premier dispositif de refroidissement (11), l'agent de refroidissement liquide (14) se répand, dans la première position de rotation du premier dispositif de refroidissement (11), avec une composante dans la direction de transport (x) ou à l'encontre de la direction de transport (x) vers l'un des cylindres de travail (3), et
    - tel que vu depuis le premier dispositif de refroidissement (11), l'agent de refroidissement liquide (14) se répand, dans la deuxième position de rotation du premier dispositif de refroidissement (11), de manière essentiellement orthogonale à la direction de transport (x) vers le deuxième produit laminé plat (10).
  6. Procédé d'exploitation selon la revendication 4 ou 5, caractérisé en ce que l'agent de refroidissement liquide (14) est amené au premier dispositif de refroidissement (11) pour solliciter les cylindres de travail (3) avec une première pression de travail (p1) et pour solliciter le deuxième produit laminé plat (10) avec une deuxième pression de travail (p2) et en ce que la deuxième pression de travail (p2) est inférieure à la première pression de travail (p1).
  7. Procédé d'exploitation selon la revendication 6, caractérisé en ce que la deuxième pression de travail (p2) est réglée de manière fixe ou est réglée de manière variable au moyen d'un organe de réglage (18).
  8. Procédé d'exploitation selon l'une quelconque des revendications précédentes, caractérisé en ce que, pour éliminer de la surface du deuxième produit laminé plat (10) l'agent de refroidissement liquide (14) appliqué sur la surface du deuxième produit laminé plat (10) au moyen du premier dispositif de refroidissement (11), un fluide gazeux (19) est soufflé transversalement sur le deuxième produit laminé plat (10) avant et/ou après le premier dispositif de refroidissement (11).
  9. Procédé d'exploitation selon l'une quelconque des revendications précédentes, caractérisé en ce que l'au moins une conduite (15) est flexible.
  10. Procédé d'exploitation selon l'une quelconque des revendications précédentes, caractérisé en ce que l'agent de refroidissement liquide (14) est acheminé par le biais d'une liaison rotative de l'au moins une conduite (15) au premier dispositif de refroidissement (11).
  11. Procédé d'exploitation selon l'une quelconque des revendications précédentes, caractérisé en ce que le déplacement du premier dispositif de refroidissement (11) est effectué au moyen d'un actionneur (12) configuré sous forme d'unité de cylindre hydraulique.
  12. Cage de laminage,
    - la cage de laminage présentant des cylindres de travail (3) montés dans la cage de laminage pour laminer des produits laminés plats (2) en métal, qui tournent pendant le laminage autour d'axes de cylindre (4) s'étendant transversalement à la direction de transport (x),
    - les cylindres de travail (3) pouvant être démontés de la cage de laminage,
    - la cage de laminage présentant un premier dispositif de refroidissement (11),
    - le premier dispositif de refroidissement (11) étant espacé des cylindres de travail (3) dans une position rétractée tel que vu dans la direction de transport (x) lorsque les cylindres de travail (3) sont montés,
    - le premier dispositif de refroidissement (11) pouvant être déplacé au moyen d'un actionneur (12) dans la direction de transport (x) ou à l'encontre de la direction de transport (x) de la position rétractée à une position avancée,
    caractérisée en ce que
    - lorsque les cylindres de travail (3) sont démontés, le premier dispositif de refroidissement (11) est agencé dans la position avancée dans une zone dans laquelle les cylindres de travail (3) sont agencés lorsque les cylindres de travail (3) sont montés, et
    - dans la position avancée, le premier dispositif de refroidissement (11) est en mesure de solliciter un produit laminé plat (10) en métal traversant la cage de laminage sans se déformer, lors de la traversée de la cage de laminage, avec un agent de refroidissement liquide (14) amené au premier dispositif de refroidissement (11) par le biais d'au moins une conduite (15).
  13. Cage de laminage selon la revendication 12, caractérisée en ce qu'elle présente un deuxième dispositif de refroidissement (20) au moyen duquel les cylindres de travail (3) montés dans la cage de laminage peuvent être sollicités avec un agent de refroidissement liquide (14).
  14. Cage de laminage selon la revendication 13, caractérisée en ce que le premier dispositif de refroidissement (11) et le deuxième dispositif de refroidissement (20) sont combinés en une unité de construction, de telle sorte que lors du déplacement du premier dispositif de refroidissement (11), le deuxième dispositif de refroidissement (20) est également déplacé dans la direction de transport (x) ou à l'encontre de la direction de transport (x).
  15. Cage de laminage selon la revendication 12, caractérisée en ce que les cylindres de travail (3) montés dans la cage de laminage peuvent être sollicités avec un agent de refroidissement liquide (14) au moyen du premier dispositif de refroidissement (11).
  16. Cage de laminage selon la revendication 15, caractérisée en ce que
    - le premier dispositif de refroidissement (11) est orienté dans une première position de rotation au regard d'un axe (17) s'étendant parallèlement aux axes de cylindre (6) par rapport au premier dispositif de refroidissement (11) dans la position rétractée et est orienté dans une deuxième position de rotation dans la position avancée,
    - tel que vu depuis le premier dispositif de refroidissement (11), l'agent de refroidissement liquide (14) se répand, dans la première position de rotation du premier dispositif de refroidissement (11), avec une composante dans la direction de transport (x) ou à l'encontre de la direction de transport (x) vers l'un des cylindres de travail (3) montés, et
    - tel que vu depuis le premier dispositif de refroidissement (11), l'agent de refroidissement liquide (14) se répand, dans la deuxième position de rotation du premier dispositif de refroidissement (11), de manière essentiellement orthogonale à la direction de transport (x) vers un produit laminé plat (10) traversant la cage de laminage sans se déformer.
  17. Cage de laminage selon la revendication 15 ou 16, caractérisée en ce que l'agent de refroidissement liquide (14) est amené au premier dispositif de refroidissement (11) pour solliciter les cylindres de travail (3) avec une première pression de travail (p1) et pour solliciter un produit laminé plat (10) traversant la cage de laminage avec une deuxième pression de travail (p2) et en ce que la deuxième pression de travail (p2) est inférieure à la première pression de travail (p1) .
  18. Cage de laminage selon la revendication 17, caractérisée en ce que la deuxième pression de travail (p2) est réglée de manière fixe ou peut être réglée de manière variable au moyen d'un organe de réglage.
  19. Cage de laminage selon l'une quelconque des revendications 12 à 18, caractérisée en ce que lorsque le premier dispositif de refroidissement (11) se trouve dans la position avancée, un dispositif de soufflage transversal (18) est agencé avant et/ou après le premier dispositif de refroidissement (11), au moyen duquel l'agent de refroidissement liquide (14) appliqué au moyen du premier dispositif de refroidissement (11) sur la surface du produit laminé plat (10) traversant la cage de laminage sans se déformer peut être éliminé de la surface du produit laminé plat (10) traversant la cage de laminage sans se déformer en soufflant un milieu gazeux (19) sur le produit laminé plat (10).
  20. Cage de laminage selon l'une quelconque des revendications 12 à 19, caractérisée en ce que l'au moins une conduite (15) pour amener l'agent de refroidissement liquide (14) est configurée sous forme de conduite flexible.
  21. Cage de laminage selon l'une quelconque des revendications 12 à 20, caractérisée en ce que l'agent de refroidissement liquide (14) est acheminé par le biais d'une liaison rotative lors de la transition de l'au moins une conduite (15) au premier dispositif de refroidissement (11).
  22. Cage de laminage selon l'une quelconque des revendications 12 à 21, caractérisée en ce que l'actionneur (12) est configuré sous forme d'unité de cylindre hydraulique.
EP18215003.7A 2018-12-21 2018-12-21 Refroidissement de la bande métallique dans une cage de laminoir Active EP3670011B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP18215003.7A EP3670011B1 (fr) 2018-12-21 2018-12-21 Refroidissement de la bande métallique dans une cage de laminoir
CN201980085188.5A CN113165037B (zh) 2018-12-21 2019-12-03 金属带材在轧制机架中的冷却
PCT/EP2019/083474 WO2020126473A1 (fr) 2018-12-21 2019-12-03 Refroidissement d'un feuillard métallique dans un cage de laminoir

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18215003.7A EP3670011B1 (fr) 2018-12-21 2018-12-21 Refroidissement de la bande métallique dans une cage de laminoir

Publications (2)

Publication Number Publication Date
EP3670011A1 EP3670011A1 (fr) 2020-06-24
EP3670011B1 true EP3670011B1 (fr) 2022-09-28

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EP18215003.7A Active EP3670011B1 (fr) 2018-12-21 2018-12-21 Refroidissement de la bande métallique dans une cage de laminoir

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CN (1) CN113165037B (fr)
WO (1) WO2020126473A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4101552A1 (fr) 2021-06-09 2022-12-14 Primetals Technologies Austria GmbH Procédé de fabrication d'acier micro-allié, acier micro-allié fabriqué selon le procédé et installation combinée de coulée et de laminage
AT525283B1 (de) 2021-10-29 2023-02-15 Primetals Technologies Austria GmbH Verfahren zur Herstellung eines Dualphasenstahlbands in einer Gieß-Walz-Verbundanlage, ein mit dem Verfahren hergestelltes Dualphasenstahlband und eine Gieß-Walz-Verbundanlage

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Publication number Priority date Publication date Assignee Title
FR2803548B1 (fr) 2000-01-10 2002-04-19 Vai Clecim Procede et dispositif de controle thermique du profil d'un cylindre dans un laminoir
JP4460147B2 (ja) * 2000-12-27 2010-05-12 三菱製鋼室蘭特殊鋼株式会社 圧延材の冷却装置
ATE307687T1 (de) * 2001-03-16 2005-11-15 Nakayama Steel Works Ltd Warmwalzwerk und warmwalzverfahren
DE102004040375A1 (de) * 2004-06-09 2005-12-29 Sms Demag Ag Verfahren und Walzgerüst zum Kaltwalzen von metallischem Walzgut, insbesondere von Walzband, mit Düsen für gasförmige oder flüssige Behandlungsmedien
AU2006207830B2 (en) 2005-01-24 2011-05-19 Orica Australia Pty Ltd Wireless detonator assemblies, and corresponding networks
DE102007053523A1 (de) 2007-05-30 2008-12-04 Sms Demag Ag Vorrichtung zur Beeinflussung der Temperaturverteilung über der Breite
DE102009040876A1 (de) * 2008-11-18 2010-05-20 Sms Siemag Ag Vorrichtung zum Kühlen einer Walze in einem Walzgerüst
DE102010014346A1 (de) * 2010-04-09 2011-10-13 Sms Siemag Ag Verfahren zum fliegenden Arbeitswalzenwechsel in Gießwalzanlagen und Warmbandstraßen
DE102012216570A1 (de) * 2012-05-11 2013-11-14 Sms Siemag Ag Vorrichtung zum Kühlen von Walzen
EP3006125A1 (fr) * 2014-10-09 2016-04-13 Josef Fröhling GmbH & Co. KG Laminoir et procede de laminage
EP3208006B1 (fr) * 2016-02-22 2019-04-03 Primetals Technologies Austria GmbH Dispositif de changement de rouleaux en ligne dans une cage de laminoir
CN106269931B (zh) * 2016-10-25 2018-04-06 东北大学 一种热轧无缝钢管在线连续冷却的方法
EP3434383A1 (fr) 2017-07-24 2019-01-30 Primetals Technologies Austria GmbH Dispositif de refroidissement de cage permettant le refroidissement d'un feuillard en acier dans une cage de laminoir

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WO2020126473A1 (fr) 2020-06-25
CN113165037B (zh) 2023-07-07
CN113165037A (zh) 2021-07-23
EP3670011A1 (fr) 2020-06-24

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