JP2018518369A - Method for producing a metallic strip in a casting and rolling process - Google Patents

Abstract

The present invention relates to a method for producing a metallic strip 1 in a casting and rolling system, in which the strip 1 is first cast in a casting machine and subsequently a roll stand. 10 and 11, in the event of a failure or interruption of production in the rolling mill, the following steps: (a) the strip 1 by means of the first and second separating devices 12, 13; In this case, both the separating devices are provided between the first roll stand 10 and the second roll stand 11, and (b) the first direction in the transport direction F of the strip 1. After the strip 1 is transported away from the separation device 12 and downstream of the first separation device 12, (c) after the execution of the step (a), the first separation device 12 and the second separation device 13, transporting the strip 1 in the direction of the first separation device 12, and of the strip 1 by the first separation device 12. Cutting, (d) after the implementation of step (a), is present upstream of the second separator 13 and from there is continuously conveyed in the direction of the first separator 12; The strip 1 is cut by the second separating device 13.

Description

  The present invention relates to a method for producing a metallic strip in a continuous casting and rolling system, in which, firstly, a slab is cast in a casting machine and the conveying direction of the strip. Is fed to a rolling roll stand, which is subsequently arranged, and is rolled here.

  In accordance with the above, the present invention is used in a casting and rolling facility for producing finished strips of liquid metal in endless operation. For this type of equipment, one method has been proposed, which is used when an interruption of the rolling operation occurs in the roll stand of the rolling mill in the intended or unexpected state. Is possible.

Known casting and rolling lines convert liquid steel into hot strips in a compact facility. First of all, an endless slab is cast. The slabs are divided by a shearing machine, which corresponds to the desired hot coil size in the dimensions of the slabs.
In a furnace, often configured as a roller conveyor furnace, these slabs are conditioned at temperature. Subsequently, these slabs are individually fed to the rolling line and rolled. Subsequently, the strip is cooled and wound in the cooling zone. The coil leaves the rolling line for further processing.

In a so-called semi-endless manner, the slab is cut so that two or more coils can be produced from this slab. Behind the rolling mill, an additional flying shear is provided, which divides long hot strips and thus obtains the desired coil size.
With this scheme, the number of infeed and outfeed processes that are dangerous during rolling is reduced, so that relatively thin hot strips can be produced relatively reliably.

  It is common that both process modalities can be performed in a state where the casting process and the rolling process are separated by separation, in particular slab cutting. The possible and required process speeds of the casting machine and the rolling line can be adjusted accordingly without being dependent on one another.

Due to advances in casting machines and process guides, for example by means of heating devices, today it is possible to abandon a part of the slab before rolling. The so-called endless manufacturing process (Endlos-Hertelungs-Prosess) has been developed.
In this case, the slab runs into the rolling line in an undivided state after complete solidification, whereas it is still cast in the same cast strand in the casting machine. The division of the material into coils takes place for the first time in the flying shears behind the rolling line and before the winding area.

  That is, in the endless manufacturing process described above, an operating state occurs in which the material is regularly joined as a physical object from the casting machine to the winder. All this process is performed continuously or endlessly.

Obstructions occur sporadically in facilities that are large enough to extend hundreds of meters or more. Thus, the manufacturing process must be interrupted, for example, during a malfunction in a shearing machine or the like in a hot strip rolling line. The installation is then stopped and all movement of the strip or slab is stationary. In that case, it occurs that undivided strands having different processing degrees are located over the entire length of the equipment.
In a different mechanism unit (casting machine, shearing machine, furnace, rolling line, winder), this strand is located over a length of 100m and beyond, so that independent movement is not possible. Absent.

  Faults can basically occur in all partial areas, i.e. in areas such as winders, flying shears, finishing lines, roller conveyor furnaces and the like. The rolling worker in the finishing line, for example, due to a crack in the strip between both last roll stands, and thus only manual actuation between these roll stands within the shortest time Leads to material stagnation that can be eliminated. For this purpose, time-consuming work is subsequently required, involving inspection of equipment parts and possibly repairs.

  The controller or automation system stops rolling in case of failure. The roll stand is generally raised in the shortest possible time, all drive units are stopped, and the strands are stationary. Similarly, because the slab is not divided down to the mold, the casting machine may necessarily be stationary. This mechanism unit should in particular be considered dangerous in this case. If the quiescent state continues for too long, the steel solidifies in the mold and can only be removed with very little effort.

  Removal of the solidified cast strands from the casting machine is extremely time consuming and is often possible only by manual segmentation (eg flame cutting). For this purpose, crane work is required and the mold and possibly the components of the continuous casting facility must be replaced. This induces a lot of downtime and manufacturing losses and in addition is associated with manual processing.

From US Pat. No. 6,057,056, a method and apparatus for producing a metallic strip in a continuous casting and rolling system is known, in which, firstly, a slab is cast in a casting machine, and , Supplied to a finishing mill, which is subsequently arranged in the strip conveying direction, and rolled there.
In the event of a production interruption in the finishing mill, the strip is cut into two by a separating device at one position between the casting machine and the finishing mill, with subsequent subsequent cuts. The strip portion is then transported into the strip reservoir by a drive mechanism provided behind the separating device in the transport direction. Subsequently, the strip is again cut by the separating device and chopped into individual parts.
In short, the strip portion stored in the strip reservoir is likewise chopped by the separation device in the manner that the strip portion is fed to the separation device in the opposite direction of the strip transport.

From patent document 2 it is known that in the case of a failure of the casting and rolling method, introducing a break into the strip, curving the strip end located forward in the conveying direction upwards, and chopping the subsequent strip It is. This, however, is conditioned on the concept and requires that the following strip material is still in a moving state.
Further or similar solutions, as well as special aspects of splitting slabs or strips, are described in Patent Document 3, Patent Document 4, Patent Document 5, Patent Document 6, Patent Document 7, Patent Document 8, And in patent document 9, it is treated as a theme.

  In accordance with the above, operation should not be interrupted as much as possible in a continuous casting operation in an endless installation, even in a similarly planned roll change. The strands are separated and the separated strips are rolled. Subsequently, the plates are cut from the strands, and the plates are carried out as scrap by the discharging device.

  For example, the scrap that is sometimes stacked behind the shearing machine, as proposed in US Pat. This scrap then has to be split rather in an intermediate step. Upon failure in the facility, the shearing machine is not retractable and chopped. In addition, there are no scrap runways.

International Application Publication No. 2015/101577 A1 Pamphlet European Patent No. 2 259 886 B1 European Patent No. 0 625 383 B1 German Patent Application Publication No. 198 56 767 A1 German Patent Application Publication No. 42 20 424 A1 Japanese Patent Laid-Open No. 01-224102 A JP 05-277539 A JP 63-157750 A JP 2001-276910 A

  The problem underlying the present invention is that in a casting and rolling system, the production line can be reliably, quickly and economically and advantageously partly automatic after a failure or production interruption occurs in the rolling mill. To automatically or fully automatically put it back into normal working condition and guarantee improved strip quality.

The present invention is solved by a method for producing a metallic strip in a casting and rolling system, wherein:
The strip is first cast in a casting machine; and
Subsequently, it is rolled in a roll stand, which is subsequently arranged in the casting machine in the direction of transport of the strip.
In the event of a failure or production interruption in the rolling mill,
The following steps:
(A) cutting the strip by the first and second separators, preferably simultaneously,
In that case, the strip is cut into an intermediate part, a downstream part and an upstream part,
At that time, both the first separation device and the second separation device are provided between the first roll stand and the second roll stand,
In that case, the second separation device is present upstream of the first separation device in the transport direction of the strip,
(B) conveyance of the downstream portion of the strip existing downstream of the first separation device away from the first separation device in the conveyance direction of the strip;
(C) After the implementation of step (a), in the direction of the first separation device of the intermediate part of the strip, which exists between the first separation device and the second separation device Transport, and
Cutting of this intermediate part by the first separating device,
(D) After the implementation of step (a), upstream of the strip, which is upstream of the second separator and is continuously conveyed from there to the first separator Cutting of the side part by said second separating device;
Is implemented.

In the implementation of the casting and rolling system, unexpected production interruptions may occur in the production line, for example conditioned by faults. Similarly, production interruptions can be caused intentionally, eg, conditioned by roll change.
In any case, for such cases, the present invention can be used in order to minimize damage to production line components and inconvenient downtime, or in the best case, completely. In order to eliminate, it is ensured that the mold and subsequently the steel running out of the casting machine, or the slab produced therefrom, or the strip cast therefrom, are removed as quickly as possible.
For this purpose, a first separation device and a second separation device are provided between the first roll stand and the second roll stand, these separation devices being used in step (a). Cutting the strip in the region between the first roll stand and the second roll stand, the strip being separated into an intermediate part, a downstream part and an upstream part. The In this case, it is appropriate if these first and second separators are operated simultaneously.

  It should be pointed out that with respect to the part from which the strip was cut or separated in step (a), an intermediate part of the strip exists between the first separating device and the second separating device. The downstream part is the part of the strip that exists downstream of the first separation device. The upstream part is the part of the strip that exists upstream of the second separation device.

Subsequent to step (a), the downstream part of the strip, i.e. in step (b), leaves the first separating device and in the transport direction of the strip, i.e. the first separating device is "released". And then transported for the purpose of being newly maneuverable.
After this, in that case, after the implementation of step (a), the intermediate part of the strip, which remains between the first separator and the second separator, is conveyed in the direction of the first separator. And is cut by the first separation device. Similarly, after the implementation of step (a), the upstream side of the strip that is upstream of the second separator and is continuously conveyed from there to the second separator. The part is cut by this second separating device.

In the event of a failure or interruption of production in the rolling mill, the present invention provides for the cutting of the strip by a separating device and the subsequent fine chopping of each part of the strip, or of the strip part. In the context of stacking, with the cutting of each part of the strip into parts having a pre-determined length, the "dwelling" of the strip within the rolling mill, and the accompanying roll stand, And based on the recognition that damage to further components of the production line can be prevented.
In the same way, this makes it possible to minimize or completely avoid downtime in the production line. Accordingly, the present invention reduces strip loss to a minimum in the event of a failure or interruption occurring in the rolling mill, and—after the failure is resolved—to a normal endless operation within a short time. It is possible to return.

In an advantageous further configuration of the invention, steps (a) to (d) can be carried out by a control device. This means that the continuity from step (a) to (d) is guaranteed by this control device.
In addition and / or optionally within the individual steps (a) to (d), for example, the operation of the separation device for cutting and separation of the strip or parts of this strip The transport of these parts in the direction of the device or away from the separating device can be controlled by this control device.

  Along with this, the method according to the invention is used with this control device, e.g. the middle part of the strip has been completely removed from the area of the first separation device and the second separation device, and Similarly, it is possible to carry out fully automatically until the obstacles in the rolling mill have been removed.

  In an advantageous further configuration of the invention, steps (a) to (d) are initiated or activated by the operating employee in advance if corresponding instructions are given by the control device, Or at least it can be confirmed by the operating employee.

  In a further advantageous configuration of the invention, sensor devices are integrated in the rolling mill, which recognize obstacles in the rolling operation. For this case, the steps (a) to (d) can be carried out fully automatically by the control device or confirmed by the operating employee.

The transport of the cut portion of the strip away from the first separating device (step (b)) or in the direction of this first separating device (step (c)) This is done by driven rollers of one or more drive mechanisms of the rolling mill.
Appropriate operation of the separating device is an additional component in the production line, for example in the form of a strip storage or lifting device, in the context of the transport harmonized to these separating devices of the strip. Induces the advantage of not being necessary. Correspondingly, from this, the compact dimensions of the production line result in the context of favorable equipment costs.

In an advantageous further configuration of the invention, the cutting of the intermediate part in step (c) or the upstream part in step (d) can be performed such that these parts are minced. For this case, a receiving device is positioned in the lower region of the production line, for example under the respective roll stand, in order to receive a finely chopped part of the strip.
These finely chopped portions of the strip form a scrap, which scraps down from the production line after cutting by the separating device, and then further in a simple manner, for example by melting. Can be processed.

According to the optional configuration of the present invention, the intermediate part in step (c) or the upstream part of the strip in step (d) can likewise have a predetermined length given by the separating device. It can also be carried out by cutting into subsequent parts and subsequent stacking. In this case, the stack of cut sections of the strip is relative to the roller table of the rolling mill, on which the strip is transported in the conveying direction, below the roller table or on the side of the roller table. Can be done.
The cutting of the strip part into parts having a pre-determined length—along with the removal from the production line—as well as that these parts can possibly be used for sale. Also induces the advantage.

In this regard, separately, in step (c), the first separation device can finely chop the middle part of the strip, wherein in step (d) the upstream part of the strip is It should be pointed out that the second separation device can be cut into parts having a predetermined length, given in advance.
Similarly, the opposite situation, i.e. the cutting of the intermediate part of the strip by means of the first separating device (in step (c)) into the part having a predetermined length given in advance, and the step ( A fine chopping of the upstream part of this strip is also possible by means of a second separating device in d).

  In an advantageous further configuration of the invention, at least one drive mechanism device is provided between the first separating device and the second roll stand, said drive mechanism device in particular comprising step (b). , It can be ensured that the downstream part of the strip is transported away from the first separating device. Optionally, in this case, it is possible to arrange such a drive mechanism device in the form of a motor driven roller, which is a member of a roller table on which the strip is transferred or conveyed.

After the strip has been cut (step (a)) between the first roll stand and the second roll stand, i.e. preferably after simultaneous operation of the first and second separation devices Subsequently, steps (b), (c) and (d) may be performed simultaneously with each other. In this regard, in that case, the transport of the intermediate part and the upstream part of the strip in the direction of the first or second separating device and the operation of these separating devices are performed synchronously with each other. Is self-evident. This is particularly advantageous when the strip part is to be minced by the separating device.
Optionally, for this purpose it is possible to carry out steps (b), (c) and (d) in order, ie precisely in this order. This may be suitable for the case in which the strip part is to be cut into parts having a predetermined length given in advance by the separating device.

  With respect to steps (c) and (d), it should be pointed out that these steps (c) and (d) can likewise be carried out in the reverse order. In other words, step (d) is performed before step (c).

  In an advantageous further configuration of the invention, the first roll stand can be a component of a roughing mill, in which case the second roll stand is a component of a finishing mill. Is possible. This means that in that case both the first and second separators are provided in the region of the production line between the roughing mill and the finishing mill.

In an advantageous further configuration of the invention, the first roll stand and the second roll stand are each a component of one rolling mill, for example a roughing mill and / or a finishing mill. Is possible.
When the first roll stand and the second roll stand are components of the rough rolling mill and the finish rolling mill, respectively, therefore, the first separation device and the second separation device are It is possible to be provided in the region between the roughing mill and the finishing mill.
In contrast to the above, both separation devices relate to the case where the first roll stand and the second roll stand are provided in only one roughing mill or only in one finishing mill. In one such rolling mill, ie, between the first roll stand and the second roll stand.
In this case, the distance between the first roll stand and the second roll stand is sized sufficiently large to provide both separation devices between them.

In an advantageous further configuration of the invention, the method according to the invention can be controlled in such a way that a wide range of algorithms for different fault situations are incorporated in the equipment control device or in the control device.
When recognizing equipment faults by operating personnel or by sensor devices integrated in the rolling mill, all equipment parts used are automatically or partly automatically based on the decision matrix , And are controlled in such a way as to be introduced and maintained in an optimal manner for each operating situation.

In an advantageous further configuration of the invention, in the region between the first separation device and the second separation device, the induction heating device is such that the strip is heated in interaction with the induction heating device. , Provided.
Before the implementation of step (a), i.e. before the occurrence of a fault or a production interruption, a first part of the strip with a deviation of the target value for temperature is present downstream of the induction heating device. A separation device separates each subsequent strip. In other words, especially when rolling a new strip, the “overly cold” part of the strip that can occur at the front end of this strip has been removed from the production line and in that case as well. It does not reach yet another roll stand downstream of the first separation device. This means that a strip having the desired temperature and material properties is always rolled in a roll stand provided downstream of the first separation device, with the equivalent material properties being Induces the advantage of being guaranteed over the transport direction.

In an advantageous further configuration of the invention-likewise before the execution of step (a)-after which each part of the strip having a deviation from the geometric target value is separated by the second separating device after each. Separation from subsequent strips can take place.
This can effectively prevent possible damage to further equipment components, in particular downstream of the induction heating device or the second separation device. This is because such geometric deviations are eliminated in advance by the first separating device.

According to yet another embodiment of the invention, which has its own significance, a method for producing a metallic strip is carried out in a casting and rolling system,
The strip is cast in a casting machine and subsequently rolled in a roll stand, which is subsequently arranged in the casting machine in the transport direction of the strip.
In this case, at least one first separation device is provided upstream of at least one first roll stand 10. Upstream of the first separation device, an induction heating device is provided so that the strip is heated in interaction with the induction heating device. A portion of the strip having a target deviation in temperature is separated from each subsequent strip by a first separation device.
As already mentioned above, by such separation of a part of the strip having a temperature that deviates from the target value, this part is removed from the production line and, accordingly, downstream of the induction heating device. To be excluded from further rolling processes at The remaining part of the strip, which meets the reference value for the desired temperature, then has the same material properties in the rolling line downstream of the first separation device, with the rolling parameters given in advance. Can be rolled.

In the last mentioned embodiment of the invention, in a further advantageous configuration, it is possible that a second separation device is provided upstream of the induction heating device. In this case, in this case, the induction heating device is provided between the first separation device and the second separation device. A portion of the strip having a geometric target deviation is separated from each subsequent strip by a second separating device and then removed from the production line.
This ensures that the components of the production line, in particular the induction heating device, downstream of the second separation device are not damaged by such part of the strip having a deviating or defective geometry. Is guaranteed.

In a further advantageous configuration of the invention, as viewed in the transport direction of the strip, upstream of the induction heating device, a straightening device is provided, for example in the form of a straightening mechanism unit or introduction hoppers (Einfurhrichters). Is possible.
Before the strip runs into the induction heating device, the straightening device is in contact with the strip, so that the strip rests on the roller table as flat as possible. Such a straightening device deserves recommendation, especially when the front end of the strip has a geometric deviation in a “ski” manner.

  In an advantageous further configuration of the invention, the induction heating device can be configured for so-called “Boost-Modus”, ie for operation with a short overload. is there. By such an operating method of the induction heating device, the strip and in particular the front end of this strip can be heated strongly during the rolling of a new strip, in the case of the induction heating device from the strip. In some cases, conduction losses caused by relatively large intervals are effectively prevented.

  In an advantageous further configuration of the invention, for example as an option for the “boost mode” just described, an induction coil with a relatively high output is provided for the induction heating device and / or this induction heating. It is possible to insert additional induction coils in the device. In consequence, this results in a relatively strong heating of the strip at a constant spacing of the induction heating device relative to the strip, or a constant heating of the strip when the spacing of the induction heating device relative to the strip is increased. Can be achieved.

Further advantages of the invention are the following aspects:
-The use of an induction heating device, the coils of this induction heating device can be adjusted in height individually or in groups;
Use of a drum shearing machine having a plurality of cutter pairs provided on the cutter drum for chopping the material start;
Waste disposal at the beginning of the material in a containment device that can be unloaded with a crane, for example in one or more scrap containers on the underside of the facility;
-The use of a host control system for the calculation of the properties at the material start and the length of the material start to be separated;
-Consideration of different material properties and material dimensions in the calculation of the length of the material start to be separated by this control system; and
The possibility of the influence of the length of the starting edge of the material to be separated by the operating employee;
Given by.

  In the following, embodiments of the present invention will be described in detail based on the schematic simplified diagram.

2 is a side view of a part of a casting and rolling installation for carrying out the method according to the invention. FIG. It is a schematic diagram of the casting and rolling equipment of FIG. FIG. 2 is a schematic end side view of an induction heating device as two members that can be integrated into the casting and rolling facility of FIG. 1. FIG. 2 is a schematic end side view of an induction heating device that may be integrated into the casting and rolling facility of FIG. 1. FIG. 6 is a schematic side view of a portion of a casting and rolling facility for carrying out the method according to the invention, according to yet another embodiment.

  FIG. 1 shows a side view of a part of a casting and rolling facility, in which a strip 1 is rolled in a production line 2. This production line 2 follows the casting machine, in which case such casting machine is regarded as part of the prior art and is therefore not shown in the figure.

  The conveying direction in which the strip 1 is moved through the production line 2 is indicated in FIG. 1 with the arrow direction “F”.

  In the following, the important components of the production line 2 are described:

  A roll stand, that is, a first roll stand 10 and a second roll stand 11 are provided on the downstream side thereof. A first separation device 12 and a second separation device 13 are provided between the roll stands 10 and 11. In this case, the second separating device 13 is present upstream of the first separating device 12 in the transport direction F of the strip 1.

  An accumulation chamber 14 is provided below the separation devices 12 and 13, and one accommodating device 16 can be accommodated in each of the accumulation chambers. The functional aspect of the storage device 16 will be described in further detail below.

  The production line 2 is provided with a control device 17, with which important components of the production line 2 can be appropriately controlled. This control device 17 is suggested only symbolically in FIG. 1, in which case a signal conductor or other object of this kind between the control device 17 and the remaining components of the production line 2. Are not shown for simplicity.

  Drive mechanism devices 18 and 19 are provided in the production line 2, and the strip 1 can be transferred or conveyed on the roller table 4 of the production line 2 by these drive mechanism devices.

  A scale cleaning device 22 is integrated into the production line 2 on the downstream side of the first separation device 12.

The components described above of the production line 2 of FIG. 1 are again shown in the illustration of FIG. 2, ie in a schematic simplified side view.
With regard to the roll stand, it should be noted that the first roll stand 10 can be part of the roughing mill 6, in which case the second roll stand 11 is the finishing mill 8. It is possible to be a part of In any case, the second roll stand 11 is provided on the downstream side of the first roll stand 10, in which case the first and second separation devices 12, 13 are connected to the first roll stand 10. And the second roll stand 11.

  The method according to the invention is carried out in the production line 2 according to FIG. 1 or 2 and functions as follows:

In the event that a fault or production interruption occurs inside the production line 2 or downstream thereof in a roll stand or other component (not shown) of the rolling line, it has already been mentioned above. Steps (a) to (d) are performed.
In detail, in step (a), both separating devices 12, 13 are preferably operated simultaneously to cut the strip 1 at those positions. Accordingly, the intermediate portion Z remaining between the first separation device 12 and the second separation device 13, the downstream portion I existing downstream of the first separation device 12, and the first And the upstream portion II existing upstream of the second separation device 13.
Subsequently, in step (b), the downstream part I of the strip 1 is advantageously moved by the operation of the drive mechanism device 19 provided downstream of the first separator 12. In other words, the sheet is conveyed in the conveying direction F. This allows the first separation device 12 to be “released” from the downstream part I and then re-operated.
Correspondingly, the intermediate part Z of the strip 1 is conveyed in the direction of the first separating device 12 by the drive mechanism device 18 in step (c) and then cut by this first separating device 12. The During this cutting by the first separating device 12, the intermediate part Z of the strip 1 is finely chopped, and then the finely chopped part of this intermediate part Z is moved downwardly into the second It falls into a storage device 16 in the form of a scrap container inserted in a collection chamber 14 provided below one separation device 12.

  The part II upstream of the strip 1 present upstream of the second separator 13 and continuously conveyed therefrom in the direction of the second separator 13 is the second part in step (d). It is cut by the separating device 13. During this cutting, the upstream part II can likewise be finely chopped, in which case the strip nicks are directed downwards into the collecting chamber 14 provided below the second separating device 13. It falls into the containing device 16 that has been inserted.

  Obviously, with respect to a scrap container 16 that is housed in each collection chamber 14 for the accommodation of a finely chopped strip portion, this scrap container 16 can be replaced after full filling. .

  Selectively with respect to the nicks just described of the portion of the strip 1 by the first and second separating devices 12, 13, as well as this portion of the strip 1 by these separating devices 12, 13. It is also possible to divide into parts having a pre-determined length and subsequently stack them into a plate. For this case, it is possible for a suitable stacking device (not shown in the figure) to be provided in the stacking chamber 14 instead of the scrap container 16.

  In the following, further components for the production line 2 will be described, and based on these components, a method according to the present invention may be configured according to yet another embodiment.

An induction heating device 20 is provided in a region between the first separation device 12 and the second separation device 13. In this interaction with the induction heating device 20, the strip 1 can be heated for a purpose within the production line 2.
This induction heating device 20 can be formed in pieces:
Based on the schematic simplified end side view of FIG. 3, the upper induction coil 20.1 is then above the strip 1 and the lower induction below this strip 1. A coil 20.2 is provided. In order to adjust the resulting height of the induction coils 20.1, 20.2 with respect to the strip 1, as suggested by the double arrows in FIG. The spacing of 20.2 can be varied for the strip 1 (individually or synchronously with each other).
The electrical connection for the induction heating device 20 is suggested in FIG. 3 in a simplified manner by the reference numeral “21”.

  According to an alternative embodiment, the induction heating device 20 is formed in a simplified manner, as well, as illustrated in the end side view of FIG. Can be done. Similarly, in this case as well, the electrical connection for the induction heating device 20 is suggested in a simplified manner by the reference numeral “21”.

In the production line 2, in some cases, a production interruption occurs and before the steps (a) to (d) as described are carried out, the rolling of the strip 1 is carried out according to the method according to the invention. According to yet another embodiment, a portion of the strip 1 having a temperature that deviates from a pre-determined target value can be optimized by being cut off by the first separating device 12.
This means that the part of the strip 1 cut in such a manner is no longer rolled downstream of the first separating device 12 in the roll stand, but rather the first separation instead. This results in falling into the collection chamber below the device 12.
This ensures that the part following the strip 1 downstream from the first separating device 12 is subsequently rolled at a pre-given temperature, which means improved product quality. Induces.

  Furthermore, it is possible for a part of the strip 1 having a deviation from the geometric target value to be separated from the respective subsequent strip 1 by the second separating device 13. By this, the geometric deviation of the strip 1 that can occur in the wedge, saber or ski shape, in particular at the front end of the strip 1, is cut off from the strip 1 and thus It is ensured that possible damage to the equipment components of the rolling line by this deviation is eliminated, or that the rolling process downstream of the second separator 13 is not hindered by this deviation.

  With respect to the operation of the first separating device 12, i.e. for the separation of a part of the strip 1 having a deviation from the target value with respect to the temperature, and with respect to the operation of the second separating device 13, i.e. a geometric target. It should be pointed out that, for the separation of a part of the strip 1 having deviations from the value, this is likewise possible without depending on the implementation from steps (a) to (d). is there.

  FIG. 5 shows a side view of a part of the production line 2—in a schematically simplified manner—with this production line, the method according to the invention can be configured according to yet another embodiment. Within this FIG. 5, in comparison with the illustration of FIG. 2, the same components have the same reference numerals and are therefore not described again in detail.

In the production line 2 according to FIG. 5, at least one first separating device 12 is provided upstream of the roll stand 11 as viewed in the transport direction F of the strip 1. An induction heating device 20 is provided on the upstream side of the first separation device 12.
If a part of the strip 1 should have a deviation from the target value for temperature, this first separating device 12 is the same as described above with reference to FIG. Can be manipulated in a way.

Operation of the first separation device 12 for the purpose of separating a portion of the strip 1 having a deviation from the target value for temperature advantageously results in a lower temperature of the material traveling through the divided induction heating device. The adverse effect on the subsequent rolling process due to the material starting edge of the material can be minimized. This provides uniform material properties over the direction of material travel.
At this time, the stability and operating reliability of the subsequent rolling process are likewise improved, and the loss due to the transition zone is likewise reduced, for example with a decreasing material thickness. In equipment failure situations, the response time for the end of the casting operation is increased in the endless rolling equipment.

  The induction heating device 20 according to FIG. 5 can be formed as two members (as in FIG. 3) or as one member (as in FIG. 4). To avoid repetition here, please refer to the above description for FIGS.

On the upstream side of the induction heating device 20, the correction mechanism unit 24 is provided in the production line 2 according to FIG. 5, and the interval between the correction mechanism units is easily identified by a two-way arrow in FIG. 5. As such, it can be changed relative to the roller table 4. Due to the lowering of the correction mechanism unit 24 in the direction of the roller table 4, a contact state with the strip 1 is established.
This allows the front end of the strip 1 to rest as flat as possible on the roller table 4 and thereby adjust, for example, geometric deviations in the shape of the ski. It is.

  In the production line 2 according to FIG. 5, a second separating device 13 is shown in FIG. 2, ie selectively or in addition to the correction mechanism unit 24 upstream of the correction mechanism unit 24. And in this connection it can be done in the same way as already described in detail in the corresponding position.

The induction heating device 20 can already be activated when the front end or material start end of the strip 1 is guided through the induction heating device 20. The induction heating device 20 is formed as two members, in which case the induction coils 20.1, 20.2 of this induction heating device are adjusted to a relatively large distance with respect to the strip 1. If so, the heating of the strip 1 already takes place.
If the spacing of the induction coils 20.1, 20.2 cannot be reduced relative to the strip 1, possibly due to the geometry of the strip, the desired heating of the strip 1 In order to achieve this, a short time operation of the induction heating device 20 is possible in the so-called “boost mode”.

  The first separating device 12 provided downstream of the induction heating device 20 can be formed in the so-called “flying shear” style, which is connected to the front end of the strip 1 or The starting material ends are separated in whole or in individual pieces at the desired length. This is also true for the second separation device 13 which can be provided upstream of the induction heating device, with changes as required.

  The control of the separating devices 12 and 13 and the drive mechanism devices 18 and 19 and the control of the induction coils 20.1 and 20.2 for adjusting their height are performed by the control device 17 respectively. This is possible in the manner that the control device 17 is connected in signal technology with these components.

In short, it should be pointed out separately that the control device 17 can be integrated in a central control device (not shown) of the production line 2. For this case, the different steps or courses carried out in the implementation from step (a) to (d) and / or in the first or second separating device 12, 13 are the same as the production line 2 or Adapted to the rest of the course in the entire casting and rolling facility.
If the control device 17 is to be a separate module, this control device 17 suitably communicates with all control devices of the casting and rolling equipment for the purpose of reconciling the different operating conditions that take place in the production line 2. And therefore self-evident.

DESCRIPTION OF SYMBOLS 1 Strip 2 Production line 4 Roller table 6 Rough rolling mill 8 Finish rolling mill 10 1st roll stand 11 2nd roll stand 12 1st separation device 13 2nd separation device 14 Accumulation chamber 16 Storage device 17 Control device 18 , 19 Drive mechanism device 20.1 Induction coil / upper 20.2 induction coil / lower 22 scale cleaning device 24 straightening device F transport direction H height (induction coil, with respect to strip 1)
Z Middle portion of strip 1 I Downstream portion of strip 1 II Upstream portion of strip 1

  The present invention relates to a method for producing a metallic strip in a continuous casting and rolling system, in which, firstly, a slab is cast in a casting machine and the conveying direction of the strip. Is fed to a rolling roll stand, which is subsequently arranged, and is rolled here.

  In accordance with the above, the present invention is used in a casting and rolling facility for producing finished strips of liquid metal in endless operation. For this type of equipment, one method has been proposed, which is used when an interruption of the rolling operation occurs in the roll stand of the rolling mill in the intended or unexpected state. Is possible.

Known casting and rolling lines convert liquid steel into hot strips in a compact facility. First of all, an endless slab is cast. The slabs are divided by a shearing machine, which corresponds to the desired hot coil size in the dimensions of the slabs.
In a furnace, often configured as a roller conveyor furnace, these slabs are conditioned at temperature. Subsequently, these slabs are individually fed to the rolling line and rolled. Subsequently, the strip is cooled and wound in the cooling zone. The coil leaves the rolling line for further processing.

In a so-called semi-endless manner, the slab is cut so that two or more coils can be produced from this slab. Behind the rolling mill, an additional flying shear is provided, which divides long hot strips and thus obtains the desired coil size.
With this scheme, the number of infeed and outfeed processes that are dangerous during rolling is reduced, so that relatively thin hot strips can be produced relatively reliably.

  It is common that both process modalities can be performed in a state where the casting process and the rolling process are separated by separation, in particular slab cutting. The possible and required process speeds of the casting machine and the rolling line can be adjusted accordingly without being dependent on one another.

Due to advances in casting machines and process guides, for example by means of heating devices, today it is possible to abandon a part of the slab before rolling. The so-called endless manufacturing process (Endlos-Hertelungs-Prosess) has been developed.
In this case, the slab runs into the rolling line in an undivided state after complete solidification, whereas it is still cast in the same cast strand in the casting machine. The division of the material into coils takes place for the first time in the flying shears behind the rolling line and before the winding area.

  That is, in the endless manufacturing process described above, an operating state occurs in which the material is regularly joined as a physical object from the casting machine to the winder. All this process is performed continuously or endlessly.

Obstructions occur sporadically in facilities that are large enough to extend hundreds of meters or more. Thus, the manufacturing process must be interrupted, for example, during a malfunction in a shearing machine or the like in a hot strip rolling line. The installation is then stopped and all movement of the strip or slab is stationary. In that case, it occurs that undivided strands having different processing degrees are located over the entire length of the equipment.
In a different mechanism unit (casting machine, shearing machine, furnace, rolling line, winder), this strand is located over a length of 100m and beyond, so that independent movement is not possible. Absent.

  Faults can basically occur in all partial areas, i.e. in areas such as winders, flying shears, finishing lines, roller conveyor furnaces and the like. The rolling worker in the finishing line, for example, due to a crack in the strip between both last roll stands, and thus only manual actuation between these roll stands within the shortest time Leads to material stagnation that can be eliminated. For this purpose, time-consuming work is subsequently required, involving inspection of equipment parts and possibly repairs.

  The controller or automation system stops rolling in case of failure. The roll stand is generally raised in the shortest possible time, all drive units are stopped, and the strands are stationary. Similarly, because the slab is not divided down to the mold, the casting machine may necessarily be stationary. This mechanism unit should in particular be considered dangerous in this case. If the quiescent state continues for too long, the steel solidifies in the mold and can only be removed with very little effort.

  Removal of the solidified cast strands from the casting machine is extremely time consuming and is often possible only by manual segmentation (eg flame cutting). For this purpose, crane work is required and the mold and possibly the components of the continuous casting facility must be replaced. This induces a lot of downtime and manufacturing losses and in addition is associated with manual processing.

From US Pat. No. 6,057,056, a method and apparatus for producing a metallic strip in a continuous casting and rolling system is known, in which, firstly, a slab is cast in a casting machine, and , Supplied to a finishing mill, which is subsequently arranged in the strip conveying direction, and rolled there.
In the event of a production interruption in the finishing mill, the strip is cut into two by a separating device at one position between the casting machine and the finishing mill, with subsequent subsequent cuts. The strip portion is then transported into the strip reservoir by a drive mechanism provided behind the separating device in the transport direction. Subsequently, the strip is again cut by the separating device and chopped into individual parts.
In short, the strip portion stored in the strip reservoir is likewise chopped by the separation device in the manner that the strip portion is fed to the separation device in the opposite direction of the strip transport.

From patent document 2 it is known that in the case of a failure of the casting and rolling method, introducing a break into the strip, curving the strip end located forward in the conveying direction upwards, and chopping the subsequent strip It is. This, however, is conditioned on the concept and requires that the following strip material is still in a moving state.
Further or similar solutions, as well as special aspects of splitting slabs or strips, are described in Patent Document 3, Patent Document 4, Patent Document 5, Patent Document 6, Patent Document 7, and Patent Document 8 is treated as a theme.

  In accordance with the above, operation should not be interrupted as much as possible in a continuous casting operation in an endless installation, even in a similarly planned roll change. The strands are separated and the separated strips are rolled. Subsequently, the plates are cut from the strands, and the plates are carried out as scrap by the discharging device.

  For example, the scrap that is sometimes stacked behind the shearing machine, as proposed in US Pat. This scrap then has to be split rather in an intermediate step. Upon failure in the facility, the shearing machine is not retractable and chopped. In addition, there are no scrap runways.

  Patent document 9 shows a method and an apparatus for producing a hot-rolled product in a cast-rolling complex facility, and in that case, in the event of unplanned production interruption as well. A continuous casting process can be maintained.
In contrast, in order to resolve manufacturing interruptions, in one piece of equipment that is subsequently placed in the device for splitting and unloading, the following method steps or partial steps:
a) Cutting the strand part of the continuously produced material by a first shearing machine;
b) Lifting the end part of the strand part from the roller table by a lifting device;
c) Strands from the first shearing machine to the scrap pieces, chopping the material that has passed through the first shearing machine, carrying out these scrap pieces, and restoring the operational state of the casting and rolling complex equipment Part removal,
Is implemented.

  Patent Document 10 and Patent Document 11 each show a method for producing a metallic strip in the casting and rolling method according to the superordinate concept of claim 1.

International Application Publication No. 2015/101577 A1 Pamphlet European Patent No. 2 259 886 B1 German Patent Application Publication No. 198 56 767 A1 German Patent Application Publication No. 42 20 424 A1 Japanese Patent Laid-Open No. 01-224102 A JP 05-277539 A JP 63-157750 A JP 2001-276910 A International Application Publication No. 2009/121678 A1 Pamphlet European Patent No. 0 625 383 B1 European Patent No. 2 428 288 B1

  The problem underlying the present invention is to ensure improved strip quality in the casting and rolling process.

  The present invention is solved by a method for producing a metallic strip in a casting and rolling system, in which the strip is cast in a casting machine and subsequently in the direction of transport of the strip to the casting machine. It is rolled in a roll stand, which is subsequently arranged.
In this case, at least one first separation device is provided upstream of at least one first roll stand. Upstream of the first separation device, an induction heating device is provided so that the strip is heated in interaction with the induction heating device. A portion of the strip having a target deviation in temperature is separated from each subsequent strip by a first separation device.
Such separation of a portion of the strip having a temperature that deviates from the target value is removed from the production line and, with this, is excluded from further rolling processes downstream of the induction heating device. To be done. The remaining part of the strip, which meets the reference value for the desired temperature, then has the same material properties in the rolling line downstream of the first separation device, with the rolling parameters given in advance. Can be rolled.

  In a further advantageous configuration of the invention it is possible that a second separation device is provided upstream of the induction heating device. In this case, in this case, the induction heating device is provided between the first separation device and the second separation device. A portion of the strip having a geometric target deviation is separated from each subsequent strip by a second separating device and then removed from the production line.
This ensures that the components of the production line, in particular the induction heating device, downstream of the second separation device are not damaged by such part of the strip having a deviating or defective geometry. Is guaranteed.

  In the implementation of the casting and rolling system, unexpected production interruptions may occur in the production line, for example conditioned by faults. Similarly, production interruptions can be caused intentionally, eg, conditioned by roll change.
In any case, for such cases, the present invention can be used in order to minimize damage to production line components and inconvenient downtime, or in the best case, completely. In order to eliminate, it is ensured that the mold and subsequently the steel running out of the casting machine, or the slab produced therefrom, or the strip cast therefrom, are removed as quickly as possible.
For this purpose, a first separation device and a second separation device are provided between the first roll stand and the second roll stand, which separate the strip from the first roll stand. Cutting in the area between one roll stand and the second roll stand, the strip being separated into an intermediate part, a downstream part and an upstream part. In this case, it is appropriate if these first and second separators are operated simultaneously.

  It should be pointed out that with respect to the part where the strip has been cut or separated, an intermediate part of the strip exists between the first separating device and the second separating device. The downstream part is the part of the strip that exists downstream of the first separation device. The upstream part is the part of the strip that exists upstream of the second separation device.

  In the event of a failure or interruption of production in the rolling mill, the present invention provides for the cutting of the strip by a separating device and the subsequent fine chopping of each part of the strip, or of the strip part. In the context of stacking, with the cutting of each part of the strip into parts having a pre-determined length, the "dwelling" of the strip within the rolling mill, and the accompanying roll stand, And based on the recognition that damage to further components of the production line can be prevented.
In the same way, this makes it possible to minimize or completely avoid downtime in the production line. Accordingly, the present invention reduces strip loss to a minimum in the event of a failure or interruption occurring in the rolling mill, and—after the failure is resolved—to a normal endless operation within a short time. It is possible to return.

  In an advantageous further configuration of the invention, the operation of the separation device can be carried out by a control device. This means that the operation of the separating device is guaranteed by this control device.

  Along with this, the method according to the invention is used with this control device, e.g. the middle part of the strip has been completely removed from the area of the first separation device and the second separation device, and Similarly, it is possible to carry out fully automatically until the obstacles in the rolling mill have been removed.

  In a further advantageous configuration of the invention, sensor devices are integrated in the rolling mill, which recognize obstacles in the rolling operation. For this case, in particular the operation of the second separating device can be carried out automatically by the control device or can be confirmed by the operating employee.

  In an advantageous further configuration of the invention, the method according to the invention can be controlled in such a way that a wide range of algorithms for different fault situations are incorporated in the equipment control device or in the control device.
When recognizing equipment faults by operating personnel or by sensor devices integrated in the rolling mill, all equipment parts used are automatically or partly automatically based on the decision matrix , And are controlled in such a way as to be introduced and maintained in an optimal manner for each operating situation.

  In a further advantageous configuration of the invention, as viewed in the transport direction of the strip, upstream of the induction heating device, a straightening device is provided, for example in the form of a straightening mechanism unit or introduction hoppers (Einfurhrichters). Is possible.
Before the strip runs into the induction heating device, the straightening device is in contact with the strip, so that the strip rests on the roller table as flat as possible. Such a straightening device deserves recommendation, especially when the front end of the strip has a geometric deviation in a “ski” manner.

  In an advantageous further configuration of the invention, the induction heating device can be configured for so-called “Boost-Modus”, ie for operation with a short overload. is there. By such an operating method of the induction heating device, the strip and in particular the front end of this strip can be heated strongly during the rolling of a new strip, in the case of the induction heating device from the strip. In some cases, conduction losses caused by relatively large intervals are effectively prevented.

  In an advantageous further configuration of the invention, for example as an option for the “boost mode” just described, an induction coil with a relatively high output is provided for the induction heating device and / or this induction heating. It is possible to insert additional induction coils in the device. In consequence, this results in a relatively strong heating of the strip at a constant spacing of the induction heating device relative to the strip, or a constant heating of the strip when the spacing of the induction heating device relative to the strip is increased. Can be achieved.

  Further advantages of the invention are the following aspects:
-The use of an induction heating device, the coils of this induction heating device can be adjusted in height individually or in groups;
Use of a drum shearing machine having a plurality of cutter pairs provided on the cutter drum for chopping the material start;
Waste disposal at the beginning of the material in a containment device that can be unloaded with a crane, for example in one or more scrap containers on the underside of the facility;
-The use of a host control system for the calculation of the properties at the material start and the length of the material start to be separated;
-Consideration of different material properties and material dimensions in the calculation of the length of the material start to be separated by this control system; and
The possibility of the influence of the length of the starting edge of the material to be separated by the operating employee;
Given by.

  In the following, embodiments of the present invention will be described in detail based on the schematic simplified diagram.

2 is a side view of a part of a casting and rolling installation for carrying out the method according to the invention. FIG. It is a schematic diagram of the casting and rolling equipment of FIG. FIG. 2 is a schematic end side view of an induction heating device as two members that can be integrated into the casting and rolling facility of FIG. 1. FIG. 2 is a schematic end side view of an induction heating device that may be integrated into the casting and rolling facility of FIG. 1. FIG. 6 is a schematic side view of a portion of a casting and rolling facility for carrying out the method according to the invention, according to yet another embodiment.

  FIG. 1 shows a side view of a part of a casting and rolling facility, in which a strip 1 is rolled in a production line 2. This production line 2 follows the casting machine, in which case such casting machine is regarded as part of the prior art and is therefore not shown in the figure.

  The conveying direction in which the strip 1 is moved through the production line 2 is indicated in FIG. 1 with the arrow direction “F”.

  In the following, the important components of the production line 2 are described:

  A roll stand, that is, a first roll stand 10 and a second roll stand 11 are provided on the downstream side thereof. A first separation device 12 and a second separation device 13 are provided between the roll stands 10 and 11. In this case, the second separating device 13 is present upstream of the first separating device 12 in the transport direction F of the strip 1.

  An accumulation chamber 14 is provided below the separation devices 12 and 13, and one accommodating device 16 can be accommodated in each of the accumulation chambers. The functional aspect of the storage device 16 will be described in further detail below.

  The production line 2 is provided with a control device 17, with which important components of the production line 2 can be appropriately controlled. This control device 17 is suggested only symbolically in FIG. 1, in which case a signal conductor or other object of this kind between the control device 17 and the remaining components of the production line 2. Are not shown for simplicity.

  Drive mechanism devices 18 and 19 are provided in the production line 2, and the strip 1 can be transferred or conveyed on the roller table 4 of the production line 2 by these drive mechanism devices.

  A scale cleaning device 22 is integrated into the production line 2 on the downstream side of the first separation device 12.

  The components described above of the production line 2 of FIG. 1 are again shown in the illustration of FIG. 2, ie in a schematic simplified side view.
With regard to the roll stand, it should be noted that the first roll stand 10 can be part of the roughing mill 6, in which case the second roll stand 11 is the finishing mill 8. It is possible to be a part of In any case, the second roll stand 11 is provided on the downstream side of the first roll stand 10, in which case the first and second separation devices 12, 13 are connected to the first roll stand 10. And the second roll stand 11.

  The method according to the invention is carried out in the production line 2 according to FIG. 1 or 2 and functions as follows:

  In the event that a fault or production interruption occurs inside the production line 2 or downstream thereof in a roll stand or other component (not shown) of the rolling line, it has already been mentioned above. Steps (a) to (d) are performed.
In detail, in step (a), both separating devices 12, 13 are preferably operated simultaneously to cut the strip 1 at those positions. Accordingly, the intermediate portion Z remaining between the first separation device 12 and the second separation device 13, the downstream portion I existing downstream of the first separation device 12, and the first And the upstream portion II existing upstream of the second separation device 13.
Subsequently, in step (b), the downstream part I of the strip 1 is advantageously moved by the operation of the drive mechanism device 19 provided downstream of the first separator 12. In other words, the sheet is conveyed in the conveying direction F. This allows the first separation device 12 to be “released” from the downstream part I and then re-operated.
Correspondingly, the intermediate part Z of the strip 1 is conveyed in the direction of the first separating device 12 by the drive mechanism device 18 in step (c) and then cut by this first separating device 12. The During this cutting by the first separating device 12, the intermediate part Z of the strip 1 is finely chopped, and then the finely chopped part of this intermediate part Z is moved downwardly into the second It falls into a storage device 16 in the form of a scrap container inserted in a collection chamber 14 provided below one separation device 12.

  The part II upstream of the strip 1 present upstream of the second separator 13 and continuously conveyed from there in the direction of the second separator 13 is the second part in step (d). It is cut by the separation device 13. During this cutting, the upstream part II can likewise be finely chopped, in which case the strip nicks are directed downwards into the collecting chamber 14 provided below the second separating device 13. It falls into the containing device 16 that has been inserted.

  Obviously, with respect to a scrap container 16 that is housed in each stacking chamber 14 for receiving a finely chopped strip portion, the scrap container 16 can be replaced after full filling. is there.

  Selectively with respect to the nicks just described of the portion of the strip 1 by the first and second separating devices 12, 13, as well as this portion of the strip 1 by these separating devices 12, 13. It is also possible to divide into parts having a pre-determined length and subsequently stack them into a plate. For this case, it is possible for a suitable stacking device (not shown in the figure) to be provided in the stacking chamber 14 instead of the scrap container 16.

  In the following, further components for the production line 2 will be described, and based on these components, a method according to the present invention may be configured according to yet another embodiment.

  An induction heating device 20 is provided in a region between the first separation device 12 and the second separation device 13. In this interaction with the induction heating device 20, the strip 1 can be heated for a purpose within the production line 2.
This induction heating device 20 can be formed in pieces:
Based on the schematic simplified end side view of FIG. 3, the upper induction coil 20.1 is then above the strip 1 and the lower induction below this strip 1. A coil 20.2 is provided. In order to adjust the resulting height of the induction coils 20.1, 20.2 with respect to the strip 1, as suggested by the double arrows in FIG. The spacing of 20.2 can be varied for the strip 1 (individually or synchronously with each other).
The electrical connection for the induction heating device 20 is suggested in FIG. 3 in a simplified manner by the reference numeral “21”.

  According to an alternative embodiment, the induction heating device 20 is formed in a simplified manner, as well, as illustrated in the end side view of FIG. Can be done. Similarly, in this case as well, the electrical connection for the induction heating device 20 is suggested in a simplified manner by the reference numeral “21”.

  In the production line 2, in some cases, a production interruption occurs and before the steps (a) to (d) as described are carried out, the rolling of the strip 1 is carried out according to the method according to the invention. According to yet another embodiment, a portion of the strip 1 having a temperature that deviates from a pre-determined target value can be optimized by being cut off by the first separating device 12.
This means that the part of the strip 1 cut in such a manner is no longer rolled downstream of the first separating device 12 in the roll stand, but rather the first separation instead. This results in falling into the collection chamber below the device 12.
This ensures that the part following the strip 1 downstream from the first separating device 12 is subsequently rolled at a pre-given temperature, which means improved product quality. Induces.

  Furthermore, it is possible for a part of the strip 1 having a deviation from the geometric target value to be separated from the respective subsequent strip 1 by the second separating device 13. By this, the geometric deviation of the strip 1 that can occur in the wedge, saber or ski shape, in particular at the front end of the strip 1, is cut off from the strip 1 and thus It is ensured that possible damage to the equipment components of the rolling line by this deviation is eliminated, or that the rolling process downstream of the second separator 13 is not hindered by this deviation.

  With respect to the operation of the first separating device 12, i.e. for the separation of a part of the strip 1 having a deviation from the target value with respect to the temperature, and with respect to the operation of the second separating device 13, i.e. a geometric target. It should be pointed out that, for the separation of a part of the strip 1 having deviations from the value, this is likewise possible without depending on the implementation from steps (a) to (d). is there.

  FIG. 5 shows a side view of a part of the production line 2—in a schematically simplified manner—with this production line, the method according to the invention can be configured according to yet another embodiment. Within this FIG. 5, in comparison with the illustration of FIG. 2, the same components have the same reference numerals and are therefore not described again in detail.

  In the production line 2 according to FIG. 5, at least one first separating device 12 is provided upstream of the roll stand 11 as viewed in the transport direction F of the strip 1. An induction heating device 20 is provided on the upstream side of the first separation device 12.
If a part of the strip 1 should have a deviation from the target value for temperature, this first separating device 12 is the same as described above with reference to FIG. Can be manipulated in a way.

  Operation of the first separation device 12 for the purpose of separating a portion of the strip 1 having a deviation from the target value for temperature advantageously results in a lower temperature of the material traveling through the divided induction heating device. The adverse effect on the subsequent rolling process due to the material starting edge of the material can be minimized. This provides uniform material properties over the direction of material travel.
At this time, the stability and operating reliability of the subsequent rolling process are likewise improved, and the loss due to the transition zone is likewise reduced, for example with a decreasing material thickness. In equipment failure situations, the response time for the end of the casting operation is increased in the endless rolling equipment.

  The induction heating device 20 according to FIG. 5 can be formed as two members (as in FIG. 3) or as one member (as in FIG. 4). To avoid repetition here, please refer to the above description for FIGS.

  On the upstream side of the induction heating device 20, the correction mechanism unit 24 is provided in the production line 2 according to FIG. 5, and the interval between the correction mechanism units is easily identified by a two-way arrow in FIG. 5. As such, it can be changed relative to the roller table 4. Due to the lowering of the correction mechanism unit 24 in the direction of the roller table 4, a contact state with the strip 1 is established.
This allows the front end of the strip 1 to rest as flat as possible on the roller table 4 and thereby adjust, for example, geometric deviations in the shape of the ski. It is.

  In the production line 2 according to FIG. 5, a second separating device 13 is shown in FIG. 2, ie selectively or in addition to the correction mechanism unit 24 upstream of the correction mechanism unit 24. And in this connection it can be done in the same way as already described in detail in the corresponding position.

  The induction heating device 20 can already be activated when the front end or material start end of the strip 1 is guided through the induction heating device 20. The induction heating device 20 is formed as two members, in which case the induction coils 20.1, 20.2 of this induction heating device are adjusted to a relatively large distance with respect to the strip 1. If so, the heating of the strip 1 already takes place.
If the spacing of the induction coils 20.1, 20.2 cannot be reduced relative to the strip 1, possibly due to the geometry of the strip, the desired heating of the strip 1 In order to achieve this, a short time operation of the induction heating device 20 is possible in the so-called “boost mode”.

  The first separating device 12 provided downstream of the induction heating device 20 can be formed in the so-called “flying shear” style, which is connected to the front end of the strip 1 or The starting material ends are separated in whole or in individual pieces at the desired length. This is also true for the second separation device 13 which can be provided upstream of the induction heating device, with changes as required.

  The control of the separating devices 12 and 13 and the drive mechanism devices 18 and 19 and the control of the induction coils 20.1 and 20.2 for adjusting their height are performed by the control device 17 respectively. This is possible in the manner that the control device 17 is connected in signal technology with these components.

  In short, it should be pointed out separately that the control device 17 can be integrated in a central control device (not shown) of the production line 2. For this case, the different steps or courses carried out in the implementation from step (a) to (d) and / or in the first or second separating device 12, 13 are the same as the production line 2 or Adapted to the rest of the course in the entire casting and rolling facility.
If the control device 17 is to be a separate module, this control device 17 suitably communicates with all control devices of the casting and rolling equipment for the purpose of reconciling the different operating conditions that take place in the production line 2. And therefore self-evident.

  1 strip
  2 Production line
  4 Roller table
  6 Rough rolling mill
  8 Finishing mill
  10 First roll stand
  11 Second roll stand
  12 First separation device
  13 Second separator
  14 collection room
  16 Containment device
  17 Control device
  18, 19 Drive mechanism device
  20.1 Induction coil / upper
  20.2 Induction coil / underside
  22 Scale cleaning equipment
  24 Straightening device
  F Transport direction
  H Height (for induction coil, strip 1)
  Z Middle part of strip 1
  I The downstream part of the strip 1
  II Portion upstream of strip 1

Claims (23)

A method for producing a metallic strip (1) in a casting and rolling system, comprising:
In this way,
The strip (1) is first cast in a casting machine; and
Subsequently, it is rolled in a roll stand (10, 11), which is subsequently arranged on the casting machine in the transport direction (F) of the strip (1),
In case of failure or production interruption in the rolling mill,
The following steps:
(A) cutting the strip (1), preferably simultaneously, by the first separating device (12) and the second separating device (13);
The strip is then cut into an intermediate part (Z), a downstream part (I), and an upstream part (II),
Both the first separator (12) and the second separator (13) are provided between the first roll stand (10) and the second roll stand (11),
The second separating device (13) is present upstream of the first separating device (12) in the transport direction (F) of the strip (1),
(B) The first portion in the transport direction (F) of the strip (1) of the downstream portion (I) of the strip (1) existing downstream of the first separation device (12). Transport away from the separating device (12),
(C) After the implementation of step (a), the intermediate part (Z) of the strip (1) present between the first separator (12) and the second separator (13) ) In the direction of the first separating device (12), and
Cutting of this intermediate part (Z) by said first separating device (12),
(D) After the execution of the step (a), it exists upstream from the second separator (13) and is continuously conveyed from there to the first separator (12). Cutting the upstream portion of the strip (1) by the second separator (13);
Is implemented.   The method according to claim 1, characterized in that the steps (a) to (d) are carried out by a control device (17).   The process is controlled in at least one of the steps (a) to (d), preferably in all the steps (a) to (d), respectively. 3. A method according to claim 1 or 2, characterized in that it is controlled by a device (17).   4. The method according to claim 1, wherein steps (a) to (d) are activated by an operating employee.   Sensor devices are integrated in the rolling mill. By these sensor devices, obstacles in the rolling operation are recognized, and the steps (a) to (d) are automatically performed by the control device (17). The method according to claim 2, wherein the method is confirmed by the operating employee.   The intermediate portion (Z) of the strip (1) is finely chopped by the first separating device (12) or has a predetermined length in step (c). 6. A method according to any one of claims 1 to 5, characterized in that it is cut and subsequently stacked.   The upstream part (II) of the strip (1) is finely chopped or given a predetermined length by the second separating device (13) in step (d). 7. A method as claimed in any one of the preceding claims, characterized in that it is cut into successive parts and subsequently stacked.   Finely chopped portions of the intermediate portion (Z) or the upstream portion (II) are accommodated in at least one accommodation device (16) provided below the roll stand (10, 11). The method according to claim 6 or 7, characterized in that:   Stacking of the cut portions of the intermediate portion (Z) or the upstream portion (II) of the strip (1), on which the strip (1) is transferred in the transport direction (F) The roller table (4) of the rolling mill is carried out below the roller table (4) or at the side of the roller table (4). the method of.   At least one drive mechanism device (18, 19) is provided between the first separation device (12) and the second roll stand (11), and the drive mechanism device is configured to perform step (b). The method according to any one of claims 1 to 9, characterized in that the transport of the downstream part of the strip (1) away from the first separating device (12) is ensured. .   11. The steps (a), (b), (c) and (d) are carried out in sequence, i.e. precisely in this order or simultaneously. The method as described in any one of.   11. Steps (c) and (d) are performed in reverse order, i.e. step (d) is performed before step (c). The method described.   The first roll stand (10) is a component of the roughing mill (6), and the second roll stand (11) is a component of the finish rolling mill (8). The method according to claim 1.   The first roll stand (10) and the second roll stand (11) are components of a roughing mill (6) and / or a finishing mill (8), respectively. The method according to any one of claims 1 to 13. In the region between the first separator (12) and the second separator (13), the induction heating device (20) is connected to the induction heating device (20) by the strip (1). Provided to be heated in interaction,
Prior to the implementation of step (a), a portion of the strip (1) having a deviation from the target value for temperature is separated from the respective following strip (1) by the first separating device (12). 15. A method according to any one of claims 1 to 14, characterized in that they are separated.   -Prior to the implementation of step (a)-a portion of the strip (1) having a geometric target deviation is stripped by the second separating device (13) by the strip (1 16. The method of claim 15, wherein the method is separated from A method for producing a metallic strip (1) in a casting and rolling system, comprising:
In this way,
The strip (1) is cast in a casting machine and subsequently rolled in a roll-roll stand, which is subsequently arranged on the casting machine in the transport direction (F) of the strip (1);
At least one first separation device (12) is provided, this first separation device being provided upstream of at least one first roll stand (10);
-In the conveying direction (F) of the strip (1)-on the upstream side of the first separation device (12), the induction heating device (20) is connected to the induction heating device (20). To be heated in the interaction of
Method according to claim 1, characterized in that a part of the strip (1) having a deviation of the target value for temperature is separated from the respective subsequent strip (1) by the first separating device (12). A second separator (13) is provided upstream of the induction heating device (20);
The induction heating device (20) is provided between the first separation device (12) and the second separation device (13),
A portion of the strip (1) having a geometric target deviation is separated from each subsequent strip (1) by the second separating device (13). 18. The method according to 17. The induction heating device (20) is divided and formed.
The induction coil of this induction heating device (20) is provided on the upper side (20.1) and the lower side (20.2) of the strip (1),
Advantageously, these induction coils (20.1, 20.2) are arranged above and below the strip (1) in order to adjust a pre-given height (H) relative to the strip (1). 19. A method according to claim 15 or 18, characterized in that the position is adjustable in the spacing of the induction coil relative to the strip (1) independently of each other. -In the conveying direction (F) of the strip (1)-provided on the upstream side of the induction heating device (20) is a straightening device (24), which is preferably the strip (1), The strip (1), preferably the said strip, so that the front end of the strip rests flat on the roller table (4) of the rolling mill by contact with the straightening device (24). In contact with the front end of the strip (1),
The method according to any one of claims 15 to 19, characterized in that the straightening device (24) is advantageously formed in the form of a straightening mechanism unit or an introduction hopper.   16. The induction heating device (20) is operated in an overload mode for a short time to sufficiently heat the strip (1), preferably the front end of the strip. 21. The method according to any one of 1 to 20.   A relatively high power induction coil (20.1, 20.2) and / or an additional induction coil (20.1, 20.2) are integrated in the induction heating device (20). The method according to any one of claims 15 to 21, characterized in that: The first separating device (12) depends on the temperature of the strip (1) or the second separating device (13) depends on the geometric dimensions of the strip (1). Being controlled,
Advantageously, the strip (1) is divided into portions having a predetermined length which are given in advance by the first separating device (12) and / or the second separating device (13), respectively. 23. A method according to any one of claims 15 to 22, characterized in that it is cut.

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