[go: up one dir, main page]

EP4440761B1 - Procédé pour faire fonctionner une ligne de laminage, et produit-programme informatique pour la mise en oeuvre du procédé - Google Patents

Procédé pour faire fonctionner une ligne de laminage, et produit-programme informatique pour la mise en oeuvre du procédé

Info

Publication number
EP4440761B1
EP4440761B1 EP22823438.1A EP22823438A EP4440761B1 EP 4440761 B1 EP4440761 B1 EP 4440761B1 EP 22823438 A EP22823438 A EP 22823438A EP 4440761 B1 EP4440761 B1 EP 4440761B1
Authority
EP
European Patent Office
Prior art keywords
rolling
roll
stands
dimension
phase
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
EP22823438.1A
Other languages
German (de)
English (en)
Other versions
EP4440761A1 (fr
EP4440761C0 (fr
Inventor
Stephan JUENGST
Christian Mengel
Matthias Peters
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 Group 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 SMS Group GmbH filed Critical SMS Group GmbH
Publication of EP4440761A1 publication Critical patent/EP4440761A1/fr
Application granted granted Critical
Publication of EP4440761B1 publication Critical patent/EP4440761B1/fr
Publication of EP4440761C0 publication Critical patent/EP4440761C0/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions
    • B21B37/24—Automatic variation of thickness according to a predetermined programme
    • B21B37/26—Automatic variation of thickness according to a predetermined programme for obtaining one strip having successive lengths of different constant thickness
    • 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
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions
    • 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
    • B21B1/46—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 metal immediately subsequent to continuous casting
    • B21B1/463—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 metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/02—Transverse dimensions
    • B21B2261/04—Thickness, gauge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2271/00—Mill stand parameters
    • B21B2271/02—Roll gap, screw-down position, draft position
    • 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
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions
    • B21B37/22—Lateral spread control; Width control, e.g. by edge rolling

Definitions

  • the invention relates to a method and a computer program product for operating a rolling mill with a total number of M rolling stands arranged one behind the other in the rolling direction for rolling rolling stock, in particular a metal strip, from a previous final rolling dimension to a changed new final rolling dimension.
  • a final rolling dimension of the rolled stock is to be changed, optimal wear distribution of the individual rolling stands and optimal quality of the rolled stock can only be ensured with a suitable, newly calculated load redistribution at the individual rolling stands in a rolling mill and with correspondingly readjusted roll gaps.
  • the transition to the new final rolling dimension takes place in a fixed section of the rolled stock, i.e., a so-called virtual strip section. This strip section is tracked throughout the entire rolling mill, and each rolling stand changes the size of its roll gap in exactly this same strip section according to the aforementioned load redistribution.
  • wedges then form in the rolled stock. These are transition areas in which the thickness or width of the rolled stock changes from a previous final rolling dimension to a new final rolling dimension.
  • each rolling stand of the rolling mill rolls a wedge in the rolling stock or strip section in such a way that this wedge in the rolling stock begins where the previous Rolling stand has begun rolling (wedge-on-wedge). This process is described, for example, in the European patent EP 3 346 625 B1 described.
  • the adjusting cylinder travel speed must be sufficiently limited, i.e., it is usually significantly lower than the maximum technically possible travel speed for the rolling stand.
  • the artificially reduced travel speed of the adjusting cylinder results – again due to the necessarily constant mass flow – in a very long wedge in the rolled stock, especially at the exit of the last rolling stand, even though this last rolling stand could certainly open or close more quickly due to its technology.
  • This long wedge means a long transition time and a long strip section in which the transition to the new desired final dimension takes place.
  • the wedge in the rolled stock is usually scrap or waste material.
  • the long wedge and the long transition time result from the current state of the art approach, which involves achieving the desired final dimension in a single phase by pure wedge-on-wedge rolling.
  • the underlying load redistribution also includes a pass change for the last rolling stand.
  • final rolling dimension means the final rolling thickness or final rolling width of the rolled stock at the exit of the last rolling stand of the rolling mill.
  • roll stand in the sense of the invention refers to an active roll stand that actively changes the dimensions, i.e., the thickness or width, of the rolled stock through the application of force.
  • An active roll stand can change its roll gap dynamically, i.e., during a time interval with a setting cylinder travel speed, or its roll gap is statically fixed.
  • dynamic roll stand In the first case, the term “dynamic roll stand” is used below, and in the second case, hereinafter referred to as a "static rolling stand.”
  • the dimensions, i.e., the thickness or width, of the outgoing rolled stock change compared to the dimensions of the incoming rolled stock. Therefore, in the present invention, only active rolling stands of the rolling mill are involved in processing the rolled stock to the desired new final dimension. This means that unless a specific statement is made regarding a rolling stand, it is an active rolling stand.
  • inactive rolling stands can be located upstream, intermediate, or downstream of the active rolling stands in the rolling mill.
  • the method according to the invention only begins with the first active rolling stand in the rolling mill.
  • roller mill may mean a plurality of roughing stands or a finishing mill with a plurality of finishing stands or a combination of both.
  • wedge refers to a thickness or width change rolled by a rolling stand over a limited (strip) section of the rolled stock.
  • a wedge is created because the rolled stock is moved through the roll gap at a specific transport speed during a pass change.
  • the wedge can have a positive or negative gradient, viewed in the direction of mass flow. This means that a wedge is understood to mean a wedge that moves from a smaller run-out thickness to a larger run-out thickness, or vice versa.
  • the wedge can be physically moved and designed in a linear or non-linear manner; this depends on the temporal progression of the adjustment cylinder travel speed of the roll stand's adjustment cylinders for changing the roll gap and the simultaneous transport speed of the rolled stock through the roll gap.
  • pass change can mean a pass reduction or a pass increase, i.e. a reduction or enlargement of the roll gap and, consequently, a decrease or increase in the thickness or width of the rolled stock.
  • the method according to the invention typically takes place as part of or within the framework of an ongoing rolling process.
  • the instruction is given that the current (previous) final rolling dimension is to be changed to a new final rolling dimension.
  • the said first and second load redistributions are determined. Both load redistributions are designed with regard to the desired final dimension and with regard to the most uniform loading possible on the rolling stands involved.
  • the most uniform loading possible means the most uniform Wear of the rolls in the rolling stands.
  • the first load redistribution according to the inventive method begins during the ongoing rolling process.
  • the starting point for the inventive method is therefore the static settings of the roll gaps of the rolling mill at time t 0 .
  • the first phase In the first phase, according to the invention, traditional wedge-on-wedge rolling takes place, but with the special feature that the previous final rolled dimension remains unchanged in the last roll stand during this first phase.
  • the claimed sequential operation of the pass changes in the roll stands, except for the last roll stand, to intermediate roll gap sizes according to the first load redistribution serves to achieve intermediate dimensions in the rolled stock.
  • the first phase forms an intermediate stage on the path to a roll gap and dimension distribution such as will be required to achieve the final dimension at the exit of the last roll stand.
  • the claimed pass changes in the first phase are typically smaller than in the prior art, where, as mentioned above, no second phase is provided, but the desired new final dimension is generated in a single phase through wedge-on-wedge rolling.
  • the load redistribution for the first phase is carried out in such a way that the load and thus the wear of the rolls in all participating active roll stands is evened out and minimized. This also applies to the load redistribution for the second time phase.
  • the pass changes carried out at the rolling stands result in the formation of wedges in the rolled material. Due to the wedge-on-wedge rolling, the wedges generated by the individual dynamically operated rolling stands lie on top of each other. They can be of different lengths. Advantageously, however, the wedges generated in the first phase are smoothed out again at the end of the first phase by the last static rolling stand, because the last static rolling stand does not carry out any pass changes, i.e., its roll gap size is The setting remains static. This results in the major advantage that no wedge-shaped rolled stock is generated at the end of the first phase. The outgoing rolled stock has at least one changed intermediate dimension compared to the previous final dimension.
  • the changed intermediate dimensions are generated in the rolled stock by the rolling stands of the rolling mill, except for the last rolling stand, which remains at its previous setting. Because the last rolling stand remains at its previous setting, the dimensions of the outgoing rolled stock are constant. And in this respect, the part of the strip section processed during the first phase is fundamentally usable and does not have to be discarded as scrap.
  • mass flow or process disturbances advantageously occur comparatively rarely during the initial phase, and—if at all—only to a moderate extent. This is due to the following:
  • the approached intermediate roll gap sizes and the resulting intermediate dimensions are smaller in this rolling stock than in the state-of-the-art technology.
  • the wedge can also be longer, thus reducing the process disturbance.
  • the roll gap of at least the last roll stand of the rolling mill is adjusted to the new final rolling dimension by a second pass change.
  • This and optionally further pass changes are carried out according to a previously defined second load redistribution, which again aims to ensure the most even loading possible on all rolling stands involved.
  • the second load redistribution takes into account the dynamic adjustment of the pass change at the last roll stand to the new final dimension for the rolled stock.
  • a large part of the necessary changes to the dimensions of the rolled stock with regard to the new final dimension have already been implemented in the first phase, so that in the second phase only a comparatively small remaining change in the dimension or pass change needs to be made to achieve the new final dimension.
  • the remaining small remaining change in the dimension can therefore be carried out on a relatively short wedge-shaped strip section compared to the prior art.
  • This strip section is also comparatively short because the travel speed of the adjusting cylinders of the last rolling stand can be selected to a maximum, resulting in a maximum change in the exit speed of the rolled stock from the last rolling stand in the second phase.
  • the travel speed is not limited by the limited acceleration capability of the subsequent rolling stand; typically, there is simply no such subsequent rolling stand. Only the coiler would be a limiting element here.
  • the shorter wedge-shaped strip section for the transition to the new final dimension advantageously means, on the one hand, a reduction in scrap material.
  • the time required to complete the last pass acceptance in the second phase is also comparatively short due to the high possible travel speed of the adjusting cylinders.
  • the only remaining small and short-term change in the dimension - due to a only brief change in the exit speed of the Rolled stock - advantageously also leads to a temporal reduction of disturbances in the cooling section downstream of the last rolling stand and thus to a reduction of disturbances in the quality or material properties of the rolled stock.
  • the last rolling stand is actively involved in both phases; it is operated statically in the first phase and dynamically in the last phase.
  • the first and/or second load redistribution does not necessarily require a pass change for each roll stand of the rolling mill. Rather, no pass schedule change may be required for individual roll stands. These roll stands are then operated statically; i.e., their roll gaps remain unchanged.
  • the rolling stock rolled using the method according to the invention is an "endless" cast strand, through which the rolling mill is coupled to a casting machine upstream in the rolling direction.
  • endless means that the rolling stock is cast in the casting machine in the form of an endless cast strand, without subsequent transverse cutting.
  • the rolled stock can also be a slab produced by portioning, i.e., at least a simple transverse division of the continuously cast strand. Due to the transverse division, the casting machine and the rolling mill are then no longer coupled. This results in the advantage that the rolled stock can be rolled at a higher speed in the rolling mill. than the casting machine would allow due to its comparatively low casting speed.
  • the continuous cast strand or the slab separated from the continuous cast strand can contain one or more strip sections, on which the method according to the invention is carried out separately, with the first and second time phases. If the slab contains several strip sections, it is also referred to as "semi-continuous" rolling.
  • a strip section preferably corresponds to a coil length that will later be wound onto a reel. If, however, the slab comprises only one strip section, which typically also corresponds to only one coil length, it is referred to as batch rolling.
  • the roll gaps are gradually increased if the new final dimension is larger than the previous final dimension. This, of course, assumes that the dimensions of the rolled stock were correspondingly larger. Alternatively, the roll gaps are closed to reduce the final rolled dimension of the rolled stock.
  • the adjusting cylinders in the rolling stands for opening or closing the roll gap for wedge formation in the rolled stock are moved at a constant travel speed - apart from an initial acceleration and deceleration. In conjunction with an exit speed proportional to the thickness at which the rolled stock exits a rolling stand, this advantageously results in an approximately linear wedge in the rolled stock. If the travel speeds of the adjusting cylinders are not constant and/or in conjunction with non-constant exit speeds of the rolled stock for the same rolling stand, the wedges resulting in the rolled stock may also be non-linear, i.e. they may then have an uneven, e.g. curved, surface.
  • the first and second phases follow one another with a pause.
  • the pause can be omitted, so that the first and second phases follow one another immediately.
  • the first and second phases it is alternatively possible for the first and second phases to overlap such that the second phase begins before the first phase is completed. The last two alternatives advantageously lead to a shortening of the implementation time for the method according to the invention and to a shortening of the length of the transition strip section required for changing the final dimension.
  • the method according to the invention is advantageously applied in a hot rolling mill and with hot strip as the rolling stock, because the high temperature allows for relatively easy changes in the roll gap size or the dimensions of the rolling stock, i.e., without excessive force. However, this does not preclude the application of the method according to the invention for cold rolling of rolling stock.
  • computer program product also includes software burned into memory chips and software in specially manufactured ICs (integrated circuits). The memory chips and/or ICs are then the "memory of a digital computer" within the meaning of the claim.
  • Figure 1 illustrates the sequence of the individual steps of the method according to the invention at the individual rolling stands of a rolling mill.
  • the rolling stands of the rolling mill are designated F1 to F6, whereby the rolling stands F1 and F2, ie the first two rolling stands of the rolling mill, are not actively involved in the implementation of the method according to the invention according to the example in Figure 1 are involved and therefore in the Figure 1 are not mentioned.
  • the rolling direction ie, the direction of movement of the rolled material through the rolling stands F1 to F6, runs from left to right.
  • the time axis runs in the opposite direction, from right to left.
  • the implementation of the method according to the invention relates to a single (virtual) tape section 10, which is defined at least in terms of software, in which Figure 1 marked with the black horizontal double arrow.
  • This strip section is created by virtual or later real transverse division of a cast endless strand at two different times, as shown in Figure 1 marked. The two cuts not only create the strip section in question, but also simultaneously separate the rolling mill from an upstream casting machine that produces the endless cast strand.
  • the method according to the invention is carried out in two separate phases, a first temporal phase I and a second temporal phase II, which here, for example, follow one another in time with a pause P.
  • the total number of M active rolling stands in the case of the Figure 1 shown embodiment 4; it comprises the rolling stands F3, F4, F5 and F6 of a rolling mill. Of these, the rolling stands F3, F4 and F5, but not the rolling stand F6, are active in the first temporal phase I.
  • the rolling stand F6 is only active in the second temporal phase II.
  • These rolling stands are all operated dynamically here, for example. In accordance with the method according to the invention, they are not moved simultaneously, but sequentially from their initial roll gap sizes to new roll gap sizes.
  • the pass changes carried out for this purpose take place in the first temporal phase I according to a previously determined first load redistribution and in the second temporal phase II according to a previously determined second load redistribution. Both load redistributions are determined by a process model with regard to a desired new final dimension of the rolled stock and with regard to the most even possible wear of the rolls of the rolling stands.
  • the pass changes take place during the rolling of the rolled stock. Wedges form in the rolled stock as a result of the pass changes carried out.
  • the desired new final rolling dimension here for example the new desired final rolling thickness
  • the strip section 10 of the rolling stock considered here is greater than the final rolling thickness for previously rolled strip sections. Therefore, the roll gaps of the rolling stands involved are opened here.
  • the roll gap of the rolling stand F4 is also widened further during the time ⁇ t 4 for a pass change, with the result that the thickness of the rolling stock at the outlet of the rolling stand F4 increases to the new intermediate thickness D4A.
  • the rolling stand F4 advantageously begins to widen its roll gap when the beginning of the first wedge produced by the previous rolling stand F3 arrives at its inlet, i.e., at the inlet of the rolling stand F4. This is typically the case with a time interval ⁇ k 1.
  • Figure 1 It can also be seen that the opening of the roll gap of the rolling stand F3 is not yet completely completed when the rolling stand F4 already starts opening its roll gap; therefore, ⁇ k 1 ⁇ ⁇ t 3 applies.
  • the roll gap is Figure 1
  • the rolling mill is continuously expanded, so that the resulting intermediate rolling dimensions of the rolled stock at the exits of the rolling stands increase successively. This is by no means always the case, as described in the introduction.
  • the adjustment time that roll stands F4 and F5 require to open their respective roll gaps is ⁇ t 4 and ⁇ t 5 , respectively.
  • the individual roll stands F3 to F5 each generate wedges that all overlap in the rolled stock (wedge-on-wedge). This allows the desired transition from the previous final rolling dimension of the rolled stock to the new final rolling dimension to be achieved in a comparatively short section of the strip.
  • the intermediate thickness D5A enters the rolling stand F6 as the input intermediate roll dimension D6E.
  • the rolling stand is operated statically during the first time phase I, i.e., its roll gap remains unchanged.
  • the rolled stock also undergoes a change in its dimensions in the rolling stand F6 during the first time phase.
  • this change in dimension is not associated with wedge formation because the roll gap of F6 is not changed over a time interval.
  • the exit speed of the rolled stock and its intermediate dimension at the end of the first time phase are constant over time.
  • a second phase II follows.
  • the Fig.1 In the example shown, only the rolling stand F6 is actively involved. This is by no means always the case. Rather, other rolling stands can also be involved in the second phase, which can be operated statically or dynamically.
  • the last rolling stand F6 is operated according to the The method according to the invention - unlike in the first time phase - is now operated dynamically. This means that a pass change is carried out during a time interval ⁇ t6. Specifically, the roll gap of F6 is moved from its initial opening D6E to the new final dimension D6A, as shown here by way of example, due to the pass change specified by the second load redistribution.
  • the resulting wedge is very short compared to the prior art.
  • the adjusting cylinders of F6 can be moved very quickly, as shown in the upper line of Fig. 1 This allows the time interval ⁇ t 6 to be kept very short.
  • Figure 1 Below the strip diagram, the speed profile of the rolled stock at the exit of the last rolling stand F6 is shown.
  • the exit speed is lower because the stands F3 - F5 are moving up during their pass changes and the mass flow must be maintained.
  • the rolling stand F6 performs Figure 1 in the first temporal phase does not contribute to a change in the dimensions of the rolled stock or to a change in its exit speed.
  • Figure 2 illustrates a roll wedge with a negative pitch, as it is produced by driving the rolling stands according to Figure 1 can arise.
  • the Figures 3a and 3b illustrate a second embodiment of the method according to the invention, in which the roll gaps of the rolling stands involved are not opened, but closed in order to reduce the thickness of the rolled stock.
  • the rolling stands F1 to F5 are involved in the rolling of the rolled material, both during the first temporal phase I and during the subsequent second temporal phase II.
  • the stands F1 to F4 are operated dynamically in the first temporal phase I, i.e. they carry out the pass changes assigned to them by a first load redistribution in the time intervals ⁇ t 1 I, ⁇ t 2 I, ⁇ t 3 I and ⁇ t 4 I.
  • the fifth rolling stand F5 is operated statically in the first temporal phase I, i.e.
  • the rolling stand F5 does not produce any wedge in the rolled material and all wedges generated by the previous rolling stands, as shown in Figure 3a are flat-rolled by stand F5. Therefore, the exit thickness of the rolled stock at the exit of roll stand F5 is constant during the first phase I.
  • the first temporal phase is followed by the second temporal phase II, here with a short pause P.
  • all rolling stands F1 to F5 are operated dynamically, i.e. they roll one wedge each in the time intervals ⁇ t 1 II, ⁇ t 2 II, ⁇ t 3 II, ⁇ t 4 II and ⁇ t 5 II, whereby the wedges overlap in the rolling stock (wedge-on-wedge rolling), see Figure 3a and enlarged in Figure 3b .
  • Roll stand F5 is now also operated dynamically, unlike in the first temporal phase I. Specifically, the second load redistribution provides for roll stand F5 to undergo a pass change, with its roll gap being moved from its static setting in the first temporal phase I to the new, smaller final rolling thickness.
  • Figure 4 illustrates the formation of a wedge with a positive pitch in the rolling direction, as used in the second embodiment according to the Figures 3a and 3b generated by the rolling stands F1 to F5, particularly in the second temporal phase II.
  • the Figures 2 and 4 Each shows linear wedges.
  • the wedge surface could also be curved, depending on the temporal progression of the adjusting cylinder travel speeds and the temporal progression of the rolling stock exit speeds from the rolling stands.
  • Figure 5 shows a comparison of wedge lengths as they run out at the last stand F5 of a rolling mill when the rolling stands F1 to F5 of the rolling mill are operated in different operating modes.
  • the rolling stand F1 is preset to a roll gap size of 16 mm
  • the rolling stand F2 to a roll gap size of 8 mm
  • the rolling stand F3 to a roll gap size of 4 mm
  • the rolling stand F4 to a roll gap size of 2 mm
  • the rolling stand F5 is each preset to a roll gap size of 1 mm (run-out thicknesses initial state).
  • the stands F1 to F5 are thus preset in such a way that a reduction in the thickness of the rolled stock of 50% occurs at each stand.
  • all three examples also specify that the initial thickness of the rolled stock should be reduced from 16 mm to 0.8 mm at the exit of the last rolling stand F5. This is the initial situation.
  • the first example according to Figure 5 relates to the wedge-on-wedge rolling process known from the prior art. Starting from their initial states, the stands according to this prior art Each of these is reduced by the amount specified in the "Delta" line. The resulting initial thickness can be seen in the penultimate line.
  • the table for the prior art embodiment shows that, with the aforementioned thickness reduction, the rolled stock exits the last roll stand F5 with a wedge length of 16 m.
  • This large exit wedge length is unfavorable because, in case of doubt, it must be discarded as scrap.
  • the present invention aims at reducing this wedge length, which is illustrated by the two examples, extreme cases 1 and 2.
  • the two exemplary embodiments distinguish between a first temporal phase I and a second temporal phase II.
  • the run-out thicknesses at the respective stands and the respective thickness reduction in the individual phases are specified, each designated by a delta in the two tables for the exemplary embodiments.
  • the essential method step in the two exemplary embodiments according to the invention is that the rolling stand F5 remains in its initial state, here 1 mm, during phase I. Accordingly, the delta in phase I is 0 mm in each case. Only at the end of the second temporal phase II is the last rolling stand dynamically moved from its initial position to the desired new final dimension, here 0.8 mm.
  • the associated delta for stand F5 in phase II is therefore, as stated, 0.2 mm in both extreme cases.
  • Extreme case 1 is extreme in that the scaffolds F1 to F4 are operated analogously to the state of the art, but scaffold F5, as mentioned above, remains in its initial state.
  • the scaffolds F1 to F4 remain at their settings according to the first temporal phase I, and only scaffold F5 operates as described above.

Landscapes

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

Claims (15)

  1. Procédé pour l'exploitation d'un train de laminage avec un nombre total de M cages de laminoir disposées les unes à la suite des autres dans le sens de laminage pour le laminage d'un produit laminé, en particulier une bande métallique, d'une dimension de laminage finale précédente à une nouvelle dimension de laminage finale modifiée, comprenant les étapes suivantes :
    - détermination d'une première répartition de la charge pour une première phase temporelle (I) sous la forme de premières modifications de passe pour au moins certaines des M cages de laminoir en vue de la nouvelle dimension de laminage finale et
    - pendant la première phase temporelle (I), vu dans le sens de laminage : application séquentielle des modifications de passe au niveau des cages de laminoir conformément à la première répartition de la charge pendant le laminage du produit laminé en formant jusqu'à M-1 coins dans le produit laminé, chaque cage de laminoir laminant en coin - à l'exception de la première cage de laminoir - commençant à laminer le coin qu'elle provoque par la modification de passe dans le produit laminé à l'endroit où la cage de laminoir précédente a également commencé à le laminer, de sorte que les coins laminés pendant la première phase temporelle se superposent dans le produit laminé ;
    caractérisé en ce que,
    dans la première répartition de la charge, aucune modification de passe n'est prévue pour la dernière des M cages de laminoir ; et
    le procédé comprend les étapes supplémentaires suivantes :
    - détermination d'une deuxième répartition de la charge pour une deuxième phase temporelle (II) sous la forme de deuxièmes modifications de passe pour au moins la dernière cage de laminoir en vue de la nouvelle dimension de laminage finale ;
    et
    - pendant la deuxième phase temporelle (II), vu dans le sens de laminage : laminage du produit laminé à la nouvelle dimension de laminage finale par application séquentielle des modifications de passe au niveau des cages de laminoir dans la mesure où cela est prévu par la deuxième répartition de la charge.
  2. Procédé selon la revendication 1,
    caractérisé en ce que
    la première et/ou la deuxième répartition de la charge ne prévoient aucune modification de passe pour certaines des cages de laminoir.
  3. Procédé selon la revendication 1,
    caractérisé en ce que
    la première et/ou la deuxième répartition de la charge prévoient une diminution de passe pour certaines des cages de laminoir et aucune augmentation de passe pour d'autres cages de laminoir.
  4. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que
    le produit laminé est un produit coulé en continu « sans fin », par lequel le train de laminage est couplé à une machine de coulée située en amont dans le sens de laminage.
  5. Procédé selon l'une des revendications 1 à 3,
    caractérisé en ce que
    un produit coulé en continu est cisaillé transversalement après avoir quitté une machine de coulée, de sorte qu'une brame est formée en tant que produit laminé, et de sorte que le train de laminage est découplé d'une machine de coulée située en amont de celui-ci dans le sens de laminage.
  6. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que
    le produit laminé présente au moins une section de bande dans laquelle le procédé est mis en œuvre séparément avec la première et la deuxième phase temporelle, de sorte que la section de bande représente une zone de transition dans laquelle la dimension du produit laminé passe de la dimension de laminage finale précédente à la nouvelle dimension de laminage finale.
  7. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que
    l'application des modifications de passe consiste en un écartement de l'emprise pour augmenter la dimension du produit laminé ou en un rapprochement de l'emprise pour diminuer la dimension du produit laminé.
  8. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que
    les vérins de serrage dans les cages de laminoir sont déplacés pour l'application de la modification de passe, par exemple pour l'écartement ou le rapprochement de l'emprise pour la formation de coins dans le produit laminé - abstraction faite d'une accélération initiale et d'une décélération - à une vitesse de déplacement de vérin de serrage constante ou non constante.
  9. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que
    la première et la deuxième phase temporelle (I, II) se succèdent dans le temps avec ou sans pause, de préférence immédiatement l'une après l'autre.
  10. Procédé selon l'une des revendications 1 à 8,
    caractérisé en ce que
    la première et la deuxième phase temporelle se chevauchent dans le temps de telle manière que la deuxième phase (II) commence avant que la première phase (I) ne soit terminée.
  11. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que
    les cages de laminoir sont des cages de laminoir à chaud pour le laminage à chaud du produit laminé.
  12. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que
    la dimension de laminage finale est l'épaisseur de laminage finale et les cages de laminoir sont des cages de laminoir de réduction d'épaisseur.
  13. Procédé selon l'une des revendications 1 à 11,
    caractérisé en ce que
    les cages de laminoir sont respectivement une presse de serrage ou une cage de serrage et le laminage est un serrage pour réduire la largeur de laminage finale en tant que dimension de laminage finale du produit laminé.
  14. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que
    le train de laminage est formé par une pluralité de cages de dégrossissage ou par un train finisseur avec une pluralité de cages de finisseur ou en ce que le train de laminage, outre les cages de laminoir d'un train finisseur, inclut également des cages de dégrossissage.
  15. Produit-programme d'ordinateur, qui peut être chargé directement dans la mémoire de préférence interne d'un ordinateur numérique et qui comprend des sections de code logiciel avec lesquelles les étapes selon le procédé de l'une des revendications précédentes 1 à 3, 6 à 10 sont exécutées lorsque le produit s'exécute sur l'ordinateur.
EP22823438.1A 2021-11-30 2022-11-30 Procédé pour faire fonctionner une ligne de laminage, et produit-programme informatique pour la mise en oeuvre du procédé Active EP4440761B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021213566.8A DE102021213566A1 (de) 2021-11-30 2021-11-30 Verfahren zum Betreiben einer Walzstraße
PCT/EP2022/083788 WO2023099531A1 (fr) 2021-11-30 2022-11-30 Procédé pour faire fonctionner une ligne de laminage, et produit-programme informatique pour la mise en œuvre du procédé

Publications (3)

Publication Number Publication Date
EP4440761A1 EP4440761A1 (fr) 2024-10-09
EP4440761B1 true EP4440761B1 (fr) 2025-10-22
EP4440761C0 EP4440761C0 (fr) 2025-10-22

Family

ID=84536065

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22823438.1A Active EP4440761B1 (fr) 2021-11-30 2022-11-30 Procédé pour faire fonctionner une ligne de laminage, et produit-programme informatique pour la mise en oeuvre du procédé

Country Status (5)

Country Link
US (1) US20250010347A1 (fr)
EP (1) EP4440761B1 (fr)
CN (1) CN118317841A (fr)
DE (1) DE102021213566A1 (fr)
WO (1) WO2023099531A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59178113A (ja) * 1983-03-29 1984-10-09 Toshiba Corp タンデム圧延機制御方法
EP1035928A1 (fr) * 1997-11-07 2000-09-20 Siemens Aktiengesellschaft Procede et dispositif permettant de laminer une bande d'epaisseur variable
KR101331324B1 (ko) * 2008-10-30 2013-11-20 지멘스 악티엔게젤샤프트 다중 스탠드 압연 트레인을 통과하는 압연 재료의 배출 두께 조정 방법, 개회로 제어 장치 및/또는 폐회로 제어 장치 및 압연 설비
EP2428288B1 (fr) * 2010-09-08 2013-04-17 Siemens VAI Metals Technologies GmbH Procédé de fabrication de bandes en acier par laminage continu ou semi-laminage continu
US10038489B2 (en) 2017-01-05 2018-07-31 Ceva D.S.P. Ltd. System and method for adaptive demodulation of cellular device communications

Also Published As

Publication number Publication date
US20250010347A1 (en) 2025-01-09
DE102021213566A1 (de) 2023-06-01
EP4440761A1 (fr) 2024-10-09
WO2023099531A1 (fr) 2023-06-08
EP4440761C0 (fr) 2025-10-22
CN118317841A (zh) 2024-07-09

Similar Documents

Publication Publication Date Title
EP0853987B1 (fr) Installation pour la production d'un feuillard, d'un feuillard ébaucheé ou d'une bramme
EP2346625B2 (fr) Procédé de réglage d'une épaisseur de sortie d'un matériau de laminage traversant un train de laminage à plusieurs équipements, dispositif de commande et/ou de réglage et installation de laminage
DE69701196T2 (de) Verfahren zum kontinuierlichen Walzen von Blechen und/oder Bänder und entsprechende kontinuierliche Walzstrasse
EP1519798B1 (fr) Procede et installation de laminage de coulee continue pour le laminage semi-continu ou continu par coulee d'une barre de metal, en particulier d'acier, separee transversalement selon le besoin apres solidification
DE102007058709A1 (de) Verfahren zum Herstellen eines Bandes aus Stahl
EP2428288B1 (fr) Procédé de fabrication de bandes en acier par laminage continu ou semi-laminage continu
EP3000539B1 (fr) Procédé destinés à couler et laminer un produit en coulée continue
EP2340133B2 (fr) Procédé destiné au réglage d'une charge d'entraînement pour une multitude d'entraînements d'un train de laminage pour le laminage de matériaux de laminages, dispositif de commande et/ou de réglage, support de stockage, code de programme et installation de laminage
DE10310357A1 (de) Gießwalzanlage zur Erzeugen eines Stahlbandes
EP4440761B1 (fr) Procédé pour faire fonctionner une ligne de laminage, et produit-programme informatique pour la mise en oeuvre du procédé
DE102013212951A1 (de) Gießwalzanlage und Verfahren zum Herstellen von metallischem Walzgut
WO2014016045A1 (fr) Procédé pour agir rationnellement sur la géométrie d'un produit laminé
EP1414596A2 (fr) Installation de laminage a chaud
EP2718035B1 (fr) Procédé, programme informatique et train de laminoir destiné à laminer une bande métallique
EP1035928A1 (fr) Procede et dispositif permettant de laminer une bande d'epaisseur variable
WO2002040201A2 (fr) Procede et dispositif de fabrication de brames minces
EP1108484B1 (fr) Procédé pour la modification du format de la section d'une barre sous la lingotière d'une installation de coulée continue
EP0947265B1 (fr) Procédé de coulée en continu et laminage pour le finissage d'une barre de coulée dans une tolérance prédéterminée de sa largeur finale
DE102022212909A1 (de) Verfahren zum Bearbeiten eines Gießstrangs
WO2000012237A1 (fr) Procede de reduction des extremites epaissies lors du laminage de tuyaux dans un laminoir etireur-reducteur
AT528176A1 (de) Giesswalzverbundanlage mit verbesserter produktivität
DE10025080A1 (de) Verfahren zum Herstellen von Metallband
DE10038291A1 (de) Verfahren zur Formatdickenänderung des Gußstranges unterhalb der Kokille einer Stranggießanlage
DD263324A1 (de) Verfahren zum herstellen von betonstaehlen

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20240701

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20250617

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: CH

Ref legal event code: F10

Free format text: ST27 STATUS EVENT CODE: U-0-0-F10-F00 (AS PROVIDED BY THE NATIONAL OFFICE)

Effective date: 20251022

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502022005881

Country of ref document: DE

U01 Request for unitary effect filed

Effective date: 20251105

U07 Unitary effect registered

Designated state(s): AT BE BG DE DK EE FI FR IT LT LU LV MT NL PT RO SE SI

Effective date: 20251112