EP4076778B1 - Method for changing a roll configuration in a roll stand and roll arrangement - Google Patents
Method for changing a roll configuration in a roll stand and roll arrangement Download PDFInfo
- Publication number
- EP4076778B1 EP4076778B1 EP20821155.7A EP20821155A EP4076778B1 EP 4076778 B1 EP4076778 B1 EP 4076778B1 EP 20821155 A EP20821155 A EP 20821155A EP 4076778 B1 EP4076778 B1 EP 4076778B1
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- EP
- European Patent Office
- Prior art keywords
- roll
- work
- rolls
- additional
- work roll
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- 238000000034 method Methods 0.000 title claims description 16
- 238000005096 rolling process Methods 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000005097 cold rolling Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000009420 retrofitting Methods 0.000 description 1
- 238000013000 roll bending Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
- B21B31/08—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts
- B21B31/10—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts by horizontally displacing, i.e. horizontal roll changing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
- B21B13/001—Convertible or tiltable stands, e.g. from duo to universal stands, from horizontal to vertical stands
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
- B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
- B21B2013/025—Quarto, four-high stands
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
- B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
- B21B2013/028—Sixto, six-high stands
Definitions
- the invention relates to a method for changing a roll configuration in a roll stand.
- the invention also relates to a roller arrangement as a replacement set for carrying out the method.
- Roll stands are used for hot rolling slabs into hot strips and for cold rolling cold strips.
- Various roll stands are used, which differ in terms of dimensioning, the number and arrangement of rolls, as well as in terms of the equipment with technical adjustment systems and in terms of roll cooling and roll lubrication.
- Stand types are usually differentiated according to the number and arrangement of the rolls. Probably the most frequently used type of stand is the so-called four-high mill (Quarto, 4-high-mill), which has two work rolls and two back-up rolls. Six-high mills (6-high mill) are often chosen for the cold rolling of high-strength steels with particularly high quality requirements. These include additional intermediate rolls and any associated support devices. Also common are 18-roll stands and 20-roll stands (multi-roll stands, for example 18-high-mill), which have work rolls with relatively small diameters. These come into consideration for the cold rolling of high-strength steels.
- a roll stand normally comprises a pair of work rolls with associated work roll chocks, blocks for guiding the work roll chocks with work roll bending and shifting, a pair of back-up rolls with associated back-up roll chocks, a screwdown and adjustment system for setting/adjusting the roll gap, i.e. the gap between upper and lower work roll, force gauges for measuring the rolling force, roll stand, drive systems, work roll cooling and lubrication as well as equipment for guiding the rolling stock.
- Multi-roll stands have corresponding work rolls with small diameters, but these are limited with regard to the permissible entry thickness of the rolling stock. Since such flat products usually make up only a relatively small part of the usual production of a rolling train, often only four-roll stands or six-roll stands are used, which are converted as required. The conversion is expensive.
- a typical roll stand in the form of a multi-roll stand for rolling a metal strip is, for example, from WO 2004/052568 known.
- a 4-high/6-high/18-HS roll stand is known, with which different operating modes and roll diameters can be rolled in one roll stand while minimizing changeover times. It is envisaged that the work roll sets of the 4-high/6-high stand will be replaced by intermediate roll sets including lateral support rollers and the work rolls of the 18-HS stand in cassette design. Such a conversion from a 4-high or a 6-high configuration to a multi-roll mill is relatively expensive. Despite the cassette design, which basically minimizes the changeover times, it is necessary to change over the drive trains, the bending and shifting systems and the like. When changing the roll configuration, the intermediate roll sets must first be installed, then the new work rolls with a smaller diameter must be installed.
- a method and an apparatus according to the preamble of claim 1 are from JPS55027473 A1 known. Further prior art is from U.S. 2,039,959A known.
- the object of the invention is to provide a method and a device for changing the roll configuration, which make it possible to convert a roll stand from work rolls with a large diameter to work rolls with a smaller diameter with the least possible changeover effort.
- a method for changing a roll configuration in a roll stand is preferably provided in a roll stand, in which at least one work roll of the roll stand is replaced by a roll arrangement as a replacement set, the replacement set comprising at least three replacement rolls stored in a common cassette are whose outer geometry corresponds at least partially to that of the chocks of the work roll to be exchanged.
- a cassette within the meaning of the invention is to be understood as a structural unit for the simultaneous storage of a plurality of drums or rolls.
- the cassette according to the invention comprises two bearing housings for the rollers of the replacement set and any required support rollers and/or support bearings.
- the outer geometry of the bearing housing largely or completely corresponds to that of the work roll chocks to be removed, so that the configuration change, such as a work roll change, can take place within a few minutes.
- a work roll chock is generally understood to be a bearing housing for a work roll that is compatible with a roll stand.
- the configuration change is preferably carried out on a 4-high or on a 6-high roll stand.
- the replacement of the work roll can be performed with a replacement kit that includes a work roll whose diameter is smaller than the diameter of the particular work roll to be replaced.
- the configuration change described above can also be carried out on a duo stand (2-high), so that this can then be converted into a multi-roll stand.
- all work rolls are preferably replaced, although it is also possible within the scope of the invention to replace only one work roll with a corresponding cassette.
- the sum of the roll diameters of all replacement rolls in a replacement set corresponds to the maximum or minimum diameter of the work roll to be replaced in each case.
- the replacement set expediently comprises at least one first and one second additional roll, the first additional roll preferably having a larger diameter than the working roll of the replacement set and preferably the second additional roll having a diameter corresponding to the working roll of the replacement set.
- the roll arrangement according to the invention expediently comprises a working roll and a first and a second additional roll which are arranged in a common cassette.
- the additional rolls take on the function of vertical backup rolls.
- a triple configuration within the meaning of the present invention comprises a work roll and two additional rolls, with any support rollers and/or support bearings that may be required for the lateral guidance of the work rolls and/or the additional rolls not being taken into account.
- such a triple configuration also includes lateral support rollers and/or support bearings.
- the cassette comprises two bearing housings for the work roll and the additional rolls, each of which has an external geometry that essentially corresponds to that of the work roll chocks of the roll stand.
- the work roll and the first and second additional rolls are arranged vertically one above the other in the installation position of the cassette.
- the second auxiliary roll and the work roll of the replacement set can have approximately the same diameter.
- the first backup roll has a larger diameter than the work roll of the replacement set.
- the first additional roll can be, for example, the driven roll of the replacement set.
- the replacement set may include support rolls and/or support bearings that laterally support the work roll and/or the first and second auxiliary rolls.
- the driven roller of the replacement kit is provided with a drive pin adapter.
- the drive trunnion adapter expands the diameter of the auger roll hit to fit into the existing drive spindle hit.
- the cassette is preferably embodied symmetrically or rotationally symmetrically about the longitudinal axis of the driven auxiliary roller with respect to a plane that is horizontal in the installed position. This makes it possible to install the cassette rotated 180° around the longitudinal axis, so that the position of the second additional roller of the replacement set and the working roller of the replacement set or the position of the first and second additional roller can be exchanged. This makes it possible to delay wear-related rework.
- an upper and a lower cassette can also be exchanged in a frame.
- the roll arrangement according to the invention can be used in an advantageous manner both for single stands and for rolling mills with multiple stands, both in one-way and in reversing operation. Both the method and the roll arrangement according to the invention are particularly suitable for retrofitting or upgrading existing rolling mills in addition to equipping new mills.
- a roll stand 1 is shown in a 4-high or 6-high configuration.
- the vertical backup rolls 2' of the 6-high configuration are indicated with dashed lines.
- the following explanations in relation to the invention apply to both possible configurations of the roll stand 1.
- the roll stand 1 comprises two vertical backup rolls 2 and between them two work rolls 3, which are each mounted in work roll chocks 4.
- the work rolls 3 are each replaced by a cassette 5 comprising a relatively smaller diameter work roll 3', a first auxiliary roll 6 and a second auxiliary roll 7.
- the Cassette 5 further comprises a first bearing housing 5A and a second bearing housing 5B which respectively accommodate the ends of the work roll 3' and the auxiliary rolls 6,7.
- the geometry of the bearing housing essentially corresponds to the geometry of the work roll chocks 4 in each case, so that the work roll 3 in question can be replaced with the associated work roll chocks 4 without further conversion or conversion measures.
- Both work rolls 3 according to the configuration Figure 1A are each replaced by a cassette 5. For the conversion of mill stand 1 from the configuration in Figure 1A into the configuration according to Figure 1B So the provision of a total of two cassettes 5 is required.
- the cassette 5 comprises a relatively small work roll 3', above which a driven first additional roll 6 arranged vertically in line with the work roll 3' and a second additional roll 7 arranged above in a line, the diameter of which is close to that of the work roll 3' corresponds.
- the working roll 3' and the second additional roll 7 preferably have the same diameter.
- Cassette 5 shown is rotationally symmetrical with respect to the longitudinal center axis of the driven first additional roller 6 .
- Each of the rollers arranged vertically in a line is supported laterally by support rollers 8, respectively.
- the diameter of a work roll 3 in a 6-high configuration can be, for example, about 470 to 430 mm, whereas the diameter of the work roll 3' of the replacement set can have a diameter of 140 to 120 mm, for example.
- the first additional roll 6 can, for example, have a diameter of 190 to 180 mm, whereas the diameter of the second additional roll 7 preferably corresponds to the diameter of the working roll 3' of the replacement set.
- the support rollers 8 can have a diameter of about 120 mm, for example.
- the rolling speed that can be achieved with the roller arrangement according to the invention can be in the range between about 100 to 2500 m/min, preferably between about 1000 to 1500 m/min.
- the first additional roller 6 is designed as a driven roller.
- a drive journal adapter 9 which expands the diameter of the roll hit 10 of the first additional roll 6 so that it fits into the roll-side hit of the drive spindle, not shown. This takes account of the fact that the drive journal of the work roll to be exchanged usually has a diameter which is matched to the drive torques to be transmitted.
- the intermediate rollers 2 are each driven.
- the work rolls 3 of the roll configuration to be converted are not driven. Consequently, it is not necessary to drive the replacement sets provided in the form of the cassettes 5 in a three-pack configuration.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
- Metal Rolling (AREA)
Description
Die Erfindung betrifft ein Verfahren zum Wechsel einer Walzenkonfiguration in einem Walzgerüst. Die Erfindung betrifft weiterhin eine Walzenanordnung als Austauschsatz zur Durchführung des Verfahrens.The invention relates to a method for changing a roll configuration in a roll stand. The invention also relates to a roller arrangement as a replacement set for carrying out the method.
Für das Walzen von metallenen Flachprodukten kommt insbesondere der Banddickenreduzierung eine zentrale Bedeutung zu. Die hierfür erforderlichen Umformmaschinen werden als Horizontalwalzgerüste bzw. Walzgerüste bezeichnet. Walzgerüste kommen beim Warmwalzen von Brammen zu Warmbändern und zum Kaltwalzen von Kaltbändern zum Einsatz. Dabei finden verschiedene Walzgerüste Anwendung, die sich hinsichtlich der Dimensionierung, der Walzenanzahl und Walzenanordnung sowie hinsichtlich der Ausrüstung mit technischen Stellsystemen sowie hinsichtlich der Walzenkühlung und Walzenschmierung unterscheiden.For the rolling of metal flat products, strip thickness reduction is of particular importance. The forming machines required for this are referred to as horizontal roll stands or roll stands. Roll stands are used for hot rolling slabs into hot strips and for cold rolling cold strips. Various roll stands are used, which differ in terms of dimensioning, the number and arrangement of rolls, as well as in terms of the equipment with technical adjustment systems and in terms of roll cooling and roll lubrication.
Üblicherweise werden Gerüstbauarten nach Anzahl und Anordnung der Walzen unterschieden. Die wohl am häufigsten verwendete Gerüstbauart sind sogenannte Vierwalzengerüste (Quarto, 4-high-mill), die zwei Arbeitswalzen und zwei Stützwalzen aufweisen. Sechswalzengerüste (Sexto, 6-high-mill) werden häufig für das Kaltwalzen von hochfesten Stählen mit besonders hohen Qualitätsanforderungen gewählt. Diese umfassen zusätzliche Zwischenwalzen und evtl. zugehörige Stützeinrichtungen. Ebenfalls verbreitet sind 18-Rollengerüste und 20-Rollengerüste (Mehrwalzengerüste, beispielsweise 18-high-mill), die Arbeitswalzen mit verhältnismäßig kleinen Durchmessern aufweisen. Diese kommen für das Kaltwalzen von hochfesten Stählen in Betracht.Stand types are usually differentiated according to the number and arrangement of the rolls. Probably the most frequently used type of stand is the so-called four-high mill (Quarto, 4-high-mill), which has two work rolls and two back-up rolls. Six-high mills (6-high mill) are often chosen for the cold rolling of high-strength steels with particularly high quality requirements. These include additional intermediate rolls and any associated support devices. Also common are 18-roll stands and 20-roll stands (multi-roll stands, for example 18-high-mill), which have work rolls with relatively small diameters. These come into consideration for the cold rolling of high-strength steels.
Ein Walzgerüst umfasst normalerweise ein Arbeitswalzenpaar mit zugehörigen Arbeitswalzen-Einbaustücken, Blöcke zum Führen der Arbeitswalzen-Einbaustücke mit Arbeitswalzenbiegung und -verschiebung, ein Stützwalzenpaar mit zugehörigen Stützwalzen-Einbaustücken, ein Anstell- und Einstellsystem zum Einstellen/Justieren des Walzspalts, d. h. des Spalts zwischen oberer und unterer Arbeitswalze, Kraftmesseinrichtungen zur Walzkraftmessung, Walzenständer, Antriebssysteme, eine Arbeitswalzenkühlung und -schmierung sowie Einrichtungen zum Führen des Walzgutes.A roll stand normally comprises a pair of work rolls with associated work roll chocks, blocks for guiding the work roll chocks with work roll bending and shifting, a pair of back-up rolls with associated back-up roll chocks, a screwdown and adjustment system for setting/adjusting the roll gap, i.e. the gap between upper and lower work roll, force gauges for measuring the rolling force, roll stand, drive systems, work roll cooling and lubrication as well as equipment for guiding the rolling stock.
Für das Walzen von Stählen mit speziellen Legierungen und hochfesten Güten ist die Verwendung kleiner Arbeitswalzendurchmesser erforderlich, um die für das Metallband geforderte Enddicke zu erreichen. Mehrwalzengerüste weisen entsprechende Arbeitswalzen mit kleinen Durchmessern auf, diese sind jedoch hinsichtlich der zulässigen Eingangsdicke des Walzgutes beschränkt. Da solche Flachprodukte meist nur einen verhältnismäßig geringen Teil der üblichen Produktion einer Walzstraße ausmachen, finden vielfach nur Vierwalzengerüste oder Sechswalzengerüste Anwendung, die bedarfsweise umgerüstet werden. Die Umrüstung ist aufwendig.For the rolling of steels with special alloys and high-strength grades, the use of small work roll diameters is necessary in order to achieve the final gauge required for the metal strip. Multi-roll stands have corresponding work rolls with small diameters, but these are limited with regard to the permissible entry thickness of the rolling stock. Since such flat products usually make up only a relatively small part of the usual production of a rolling train, often only four-roll stands or six-roll stands are used, which are converted as required. The conversion is expensive.
Ein typisches Walzgerüst in Form eines Mehrwalzengerüsts zum Walzen eines Metallbandes ist beispielsweise aus der
Aus der
Weiterer Stand der Technik ist aus den Druckschriften
Ein Verfahren und eine Vorrichtung gemäß Oberbegriff von Anspruch 1 sind aus der
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung zum Wechsel der Walzenkonfiguration bereitzustellen, die es ermöglichen, ein Walzgerüst von Arbeitswalzen mit einem großen Durchmesser auf Arbeitswalzen mit einem kleineren Durchmesser mit kleinstmöglichem Umrüstaufwand umzubauen.The object of the invention is to provide a method and a device for changing the roll configuration, which make it possible to convert a roll stand from work rolls with a large diameter to work rolls with a smaller diameter with the least possible changeover effort.
Die Aufgabe wird gelöst mit den Merkmalen des Verfahrens gemäß Anspruch 1 sowie mit den Merkmalen der Walzenanordnung gemäß Anspruch 6.The object is achieved with the features of the method according to
Vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen.Advantageous configurations of the invention result from the dependent claims.
Nach einem Gesichtspunkt der Erfindung wird ein Verfahren zum Wechsel einer Walzenkonfiguration in einem Walzgerüst vorzugsweise in einem Walzgerüst bereitgestellt, bei welchem wenigstens eine Arbeitswalze des Walzgerüsts durch eine Walzenanordnung als Austauschsatz ersetzt wird, wobei der Austauschsatz wenigstens drei Austauschwalzen umfasst, die in einer gemeinsamen Kassette gelagert sind, deren Außengeometrie zumindest teilweise derjenigen der Einbaustücke der zu tauschenden Arbeitswalze im Wesentlichen entspricht. Dadurch ist es möglich, die Kassette ohne weitere Umbaumaßnahmen in die Walzenständer des umzurüstenden Walzgerüstes einzubauen.According to one aspect of the invention, a method for changing a roll configuration in a roll stand is preferably provided in a roll stand, in which at least one work roll of the roll stand is replaced by a roll arrangement as a replacement set, the replacement set comprising at least three replacement rolls stored in a common cassette are whose outer geometry corresponds at least partially to that of the chocks of the work roll to be exchanged. This makes it possible to install the cassette in the roll stand of the roll stand to be converted without further conversion measures.
Unter einer Kassette im Sinne der Erfindung ist eine Baueinheit für das gleichzeitige Lagern mehrerer Walzen oder Rollen zu verstehen.A cassette within the meaning of the invention is to be understood as a structural unit for the simultaneous storage of a plurality of drums or rolls.
Die Kassette gemäß der Erfindung umfasst zwei Lagergehäuse für die Walzen des Austauschsatzes und die etwa erforderlichen Stützrollen und/oder Stützlager. Die Außengeometrie der Lagergehäuse entspricht weitestgehend oder vollständig derjenigen der auszubauenden Arbeitswalzen-Einbaustücke, sodass der Konfigurationswechsel wie ein Arbeitswalzenwechsel innerhalb weniger Minuten erfolgen kann.The cassette according to the invention comprises two bearing housings for the rollers of the replacement set and any required support rollers and/or support bearings. The outer geometry of the bearing housing largely or completely corresponds to that of the work roll chocks to be removed, so that the configuration change, such as a work roll change, can take place within a few minutes.
Unter einem Arbeitswalzen-Einbaustück wird im Allgemeinen ein Lagergehäuse für eine Arbeitswalze verstanden, das mit einem Walzgerüst kompatibel ist.A work roll chock is generally understood to be a bearing housing for a work roll that is compatible with a roll stand.
Vorzugsweise sind genau drei Walzen eines Austauschsatzes und zusätzlich etwa erforderliche Stützrollen und/oder Stützlager gemeinsam in einer einzigen Kassette gelagert.Preferentially, exactly three rolls of a replacement set and any additional support rolls and/or support bearings that may be required are mounted together in a single cassette.
Vorzugsweise wird der Konfigurationswechsel an einem 4-high oder an einem 6-high Walzgerüst durchgeführt. Der Austausch der Arbeitswalze kann mit einem Austauschsatz durchgeführt werden, der eine Arbeitswalze umfasst, deren Durchmesser kleiner als der Durchmesser der jeweils auszutauschenden Arbeitswalze ist.The configuration change is preferably carried out on a 4-high or on a 6-high roll stand. The replacement of the work roll can be performed with a replacement kit that includes a work roll whose diameter is smaller than the diameter of the particular work roll to be replaced.
Im Rahmen der Erfindung kann der zuvor beschriebene Konfigurationswechsel auch an einem Duo-Gerüst (2-high) vorgenommen werden, sodass dieses dann in ein Mehrwalzengerüst umgerüstet werden kann.Within the scope of the invention, the configuration change described above can also be carried out on a duo stand (2-high), so that this can then be converted into a multi-roll stand.
Vorzugsweise werden bei dem Verfahren gemäß der Erfindung alle Arbeitswalzen ausgetauscht, obwohl im Rahmen der Erfindung auch vorgesehen sein kann, nur eine Arbeitswalze durch eine entsprechende Kassette auszutauschen.In the method according to the invention, all work rolls are preferably replaced, although it is also possible within the scope of the invention to replace only one work roll with a corresponding cassette.
Bei einer bevorzugten Variante des erfindungsgemäßen Verfahrens ist vorgesehen, dass die Summe der Walzendurchmesser aller Austauschwalzen eines Austauschsatzes dem maximalen oder minimalen Durchmesser der jeweils auszutauschenden Arbeitswalze entspricht.In a preferred variant of the method according to the invention, it is provided that the sum of the roll diameters of all replacement rolls in a replacement set corresponds to the maximum or minimum diameter of the work roll to be replaced in each case.
Zweckmäßigerweise umfasst der Austauschsatz wenigstens eine erste und eine zweite Zusatzwalze, wobei vorzugsweise die erste Zusatzwalze einen größeren Durchmesser als die Arbeitswalze des Austauschsatzes und vorzugsweise die zweite Zusatzwalze einen der Arbeitswalze des Austauschsatzes entsprechenden Durchmesser aufweist.The replacement set expediently comprises at least one first and one second additional roll, the first additional roll preferably having a larger diameter than the working roll of the replacement set and preferably the second additional roll having a diameter corresponding to the working roll of the replacement set.
Die Walzenanordnung gemäß der Erfindung umfasst zweckmäßigerweise eine Arbeitswalze und eine erste und eine zweite Zusatzwalze, die in einer gemeinsamen Kassette angeordnet sind. Dabei übernehmen die Zusatzwalzen die Funktion von vertikalen Stützwalzen. Eine Dreierkonfiguration im Sinne der vorliegenden Erfindung umfasst eine Arbeitswalze und zwei Zusatzwalzen, wobei dabei etwa erforderliche Stützrollen und/oder Stützlager zur seitlichen Führung der Arbeitswalzen und/oder der Zusatzwalzen nicht berücksichtigt sind.The roll arrangement according to the invention expediently comprises a working roll and a first and a second additional roll which are arranged in a common cassette. The additional rolls take on the function of vertical backup rolls. A triple configuration within the meaning of the present invention comprises a work roll and two additional rolls, with any support rollers and/or support bearings that may be required for the lateral guidance of the work rolls and/or the additional rolls not being taken into account.
Im Rahmen der Erfindung umfasst eine solche Dreierkonfiguration ebenfalls seitliche Stützrollen und/ oder Stützlager.Within the scope of the invention, such a triple configuration also includes lateral support rollers and/or support bearings.
Bei einer zweckmäßigen Ausgestaltung der Erfindung ist vorgesehen, dass die Kassette zwei Lagergehäuse für die Arbeitswalze und die Zusatzwalzen umfasst, die jeweils eine Außengeometrie aufweisen, die derjenigen der Arbeitswalzen-Einbaustücke des Walzgerüsts im Wesentlichen entspricht.In an expedient embodiment of the invention, it is provided that the cassette comprises two bearing housings for the work roll and the additional rolls, each of which has an external geometry that essentially corresponds to that of the work roll chocks of the roll stand.
Die Arbeitswalze sowie die erste und zweite Zusatzwalze sind in der Einbaulage der Kassette vertikal übereinander angeordnet. Die zweite Zusatzwalze und die Arbeitswalze des Austauschsatzes können einen etwa gleichen Durchmesser aufweisen. Vorzugsweise besitzt die erste Zusatzwalze einen größeren Durchmesser als die Arbeitswalze des Austauschsatzes. Die erste Zusatzwalze kann beispielsweise die angetriebene Walze des Austauschsatzes sein.The work roll and the first and second additional rolls are arranged vertically one above the other in the installation position of the cassette. The second auxiliary roll and the work roll of the replacement set can have approximately the same diameter. Preferably, the first backup roll has a larger diameter than the work roll of the replacement set. The first additional roll can be, for example, the driven roll of the replacement set.
Wie vorstehend bereits erwähnt, kann der Austauschsatz Stützrollen und/oder Stützlager umfassen, die die Arbeitswalze und/oder die erste und die zweite Zusatzwalze seitlich abstützen.As mentioned above, the replacement set may include support rolls and/or support bearings that laterally support the work roll and/or the first and second auxiliary rolls.
Zweckmäßigerweise ist die angetriebene Walze des Austauschsatzes mit einem Antriebszapfenadapter versehen. Der Antriebszapfenadapter erweitert den Durchmesser des Walzentreffers der Zusatzwalze derart, dass er in den Treffer der vorhandenen Antriebsspindel passt.Conveniently, the driven roller of the replacement kit is provided with a drive pin adapter. The drive trunnion adapter expands the diameter of the auger roll hit to fit into the existing drive spindle hit.
Vorzugsweise ist die Kassette bezogen auf eine in Einbaulage horizontale Ebene symmetrisch bzw. rotationssymmetrisch um die Längsachse der angetriebenen Zusatzwalze ausgebildet. Dadurch ist es möglich, die Kassette bedarfsweise 180° um die Längsachse gedreht einzubauen, sodass dann beispielsweise die Position der zweiten Zusatzwalze des Austauschsatzes und der Arbeitswalze des Austauschsatzes oder die Position der ersten und der zweiten Zusatzwalze getauscht werden können. Damit ist es möglich, verschleißbedingte Nacharbeiten zeitlich zu verzögern.The cassette is preferably embodied symmetrically or rotationally symmetrically about the longitudinal axis of the driven auxiliary roller with respect to a plane that is horizontal in the installed position. This makes it possible to install the cassette rotated 180° around the longitudinal axis, so that the position of the second additional roller of the replacement set and the working roller of the replacement set or the position of the first and second additional roller can be exchanged. This makes it possible to delay wear-related rework.
Durch den symmetrischen Aufbau der Kassetten kann auch ein Austausch von einer oberen und einer unteren Kassette in einem Gerüst untereinander erfolgen.Due to the symmetrical structure of the cassettes, an upper and a lower cassette can also be exchanged in a frame.
Die Walzenanordnung gemäß der Erfindung lässt sich in vorteilhafter Weise sowohl für Einzelgerüste als auch für Walzanlagen mit mehreren Gerüsten sowohl im Einweg- als auch im Reversierbetrieb verwenden. Sowohl das Verfahren als auch die Walzenanordnung gemäß der Erfindung sind neben der Ausrüstung von Neuanlagen in besonderer Art und Weise auch für die Nachrüstung oder Ertüchtigung bestehender Walzanlagen geeignet.The roll arrangement according to the invention can be used in an advantageous manner both for single stands and for rolling mills with multiple stands, both in one-way and in reversing operation. Both the method and the roll arrangement according to the invention are particularly suitable for retrofitting or upgrading existing rolling mills in addition to equipping new mills.
Die Erfindung wird nachstehend anhand eines in den Zeichnungen dargestellten Ausführungsbeispiels erläutert. Es zeigen:
- Figur 1 A
- eine schematische Darstellung einer umzurüstenden 4-high oder 6-high Walzenkonfiguration gemäß Stand der Technik,
- Figur 1 B
- eine schematische Darstellung der in
Figur 1 A dargestellten Walzenkonfiguration, bei der die Arbeitswalzen durch jeweils einen Austauschsatz gemäß der Erfindung ersetzt wurde, - Figur 2 A
- eine schematische Darstellung entsprechend
Figur 1 A , bei der schematisch der Antrieb der Arbeitswalze dargestellt ist, - Figur 2 B
- eine der
Figur 1 B entsprechende Darstellung, bei der schematisch der Antrieb des Austauschsatzes bzw. der Kassette dargestellt ist, - Figur 3 A
- eine schematische Darstellung einer umzurüstenden 4-high oder 6-high Walzenkonfiguration gemäß Stand der Technik, bei der die Stützwalzen bzw. Zwischenwalzen angetrieben sind,
- Figur 3 B
- eine schematische Darstellung der in
Figur 3 A gezeigten Walzenkonfiguration, bei der die Arbeitswalzen der Anordnung gemäßFigur 3 A durch einen Austauschsatz bzw. eine Kassette gemäß der Erfindung ersetzt wurde, Figur 4- eine schematische Darstellung eines oberen Austauschsatzes bzw. der Kassette gemäß der Erfindung, inklusive optionaler Stützrollen,
Figur 5- eine Schnittansicht entlang der Linie V-V in
undFigur 4 Figur 6- eine Schnittansicht entlang der Linie VI-VI in
.Figur 4
- Figure 1A
- a schematic representation of a 4-high or 6-high roll configuration to be converted according to the prior art,
- Figure 1B
- a schematic representation of the in
Figure 1A illustrated roll configuration, in which the work rolls have each been replaced by a replacement set according to the invention, - Figure 2A
- a schematic representation accordingly
Figure 1A , in which the drive of the work roll is shown schematically, - Figure 2B
- one of the
Figure 1B corresponding representation, in which the drive of the replacement set or the cassette is shown schematically, - Figure 3A
- a schematic representation of a 4-high or 6-high roll configuration to be converted according to the prior art, in which the backup rolls or intermediate rolls are driven,
- Figure 3B
- a schematic representation of the in
Figure 3A shown roll configuration, in which the work rolls according to the arrangementfigure 3 A has been replaced with a replacement kit or cassette according to the invention, - figure 4
- a schematic representation of an upper replacement set or the cassette according to the invention, including optional support rollers,
- figure 5
- a sectional view along the line VV in
figure 4 and - figure 6
- a sectional view along the line VI-VI in
figure 4 .
Es wird zunächst auf die
Das Walzgerüst 1 umfasst im einfachsten Fall als 4-high Konfiguration zwei vertikale Stützwalzen 2 und dazwischen zwei Arbeitswalzen 3, die jeweils in Arbeitswalzen-Einbaustücken 4 gelagert sind.In the simplest case, as a 4-high configuration, the
Erfindungsgemäß werden bei einer Umrüstung des Walzgerüsts 1 zu einer Konfiguration mit einem kleineren Arbeitswalzendurchmesser die Arbeitswalzen 3 jeweils durch eine Kassette 5 umfassend eine Arbeitswalze 3' mit verhältnismäßig kleinerem Durchmesser, eine erste Zusatzwalze 6 und eine zweite Zusatzwalze 7 ersetzt. Die Kassette 5 umfasst weiterhin ein erstes Lagergehäuse 5A und ein zweites Lagergehäuse 5B die jeweils die Enden der Arbeitswalze 3' und der Zusatzwalzen 6,7 aufnehmen. Die Geometrie der Lagergehäuse entspricht im Wesentlichen jeweils der Geometrie der Arbeitswalzen-Einbaustücke 4, sodass die betreffende Arbeitswalze 3 mit den zugehörigen Arbeitswalzen-Einbaustücken 4 ohne weitere Umrüst- oder Umbaumaßnahmen ausgetauscht werden kann. Beide Arbeitswalzen 3 der Konfiguration gemäß
Das Ausführungsbeispiel gemäß
Die Summe der Durchmesser aller vertikal angeordneter Walzen der Kassette 5 entspricht nahezu dem Durchmesser der auszutauschenden angetriebenen Arbeitswalze 3. Hinsichtlich des Aufbaus der Kassette 5 wird insbesondere auf die
Der Durchmesser einer Arbeitswalze 3 bei einer 6-high Konfiguration kann beispielsweise etwa 470 bis 430 mm betragen, wohingegen der Durchmesser der Arbeitswalze 3' des Austauschsatzes beispielsweise einen Durchmesser von 140 bis 120 mm aufweisen kann. Die erste Zusatzwalze 6 kann beispielsweise einen Durchmesser von 190 bis 180 mm aufweisen, wohingegen der Durchmesser der zweiten Zusatzwalze 7 bevorzugt dem Durchmesser der Arbeitswalze 3' des Austauschsatzes entspricht. Die Stützrollen 8 können beispielsweise einen Durchmesser von etwa 120 mm aufweisen. Die mit der Walzenanordnung gemäß der Erfindung erreichbare Walzgeschwindigkeit kann im Bereich zwischen etwa 100 bis 2500 m/min, bevorzugt etwa zwischen 1000 bis 1500 m/min betragen.The diameter of a
Wie dies den
Bei einer in den
- 11
- Walzgerüstmill stand
- 22
- Stützwalzen bei 4-high Konfiguration bzw. Zwischenwalzen bei 6-high KonfigurationBack-up rolls with 4-high configuration or intermediate rolls with 6-high configuration
- 2'2'
- Stützwalzen bei 6-high KonfigurationSupport rollers in 6-high configuration
- 33
- Arbeitswalzen des umzurüstenden WalzgerüstsWork rolls of the roll stand to be converted
- 3`3`
- Arbeitswalzen des AustauschsatzesReplacement set work rolls
- 44
- Arbeitswalzen-EinbaustückWork roll chock
- 55
- Kassettecassette
- 5A5A
- erstes Lagergehäusefirst bearing housing
- 5B5B
- zweites Lagergehäusesecond bearing housing
- 66
- erste Zusatzwalzefirst additional roll
- 77
- zweite Zusatzwalzesecond additional roll
- 88th
- Stützrollensupport rollers
- 99
- Antriebszapfenadapterdrive pin adapter
- 1010
- Walzentrefferreel hit
Claims (12)
- Method of changing a roll configuration in a roll stand, wherein the roll stand comprises at least two work rolls (3), wherein for a change in configuration at least one work roll (3) of the roll stand is exchanged for a roll arrangement as exchange set, wherein the exchange set comprises at least three exchange rolls all mounted in a common cassette (5), the outer contour of which substantially corresponds at least in part with each of those of the work roll chocks (4) of the work roll (3) to be replaced, characterised in that the exchange set comprises a first and a second additional roll (6, 7) as well as a work roll (3') and that the work roll (3') as well as the first and second additional rolls (6, 7) of the exchange set are arranged vertically one above the other in the installed position of the cassette (5).
- Method according to claim 1, characterised in that the change in configuration is carried out to a four-high or six-high roll stand.
- Method according to one of claims 1 and 2, characterised in that the exchange of the work roll (3) is carried out with an exchange set comprising a work roll (3'), the diameter of which is smaller than the diameter of the respective work roll (3) to be exchanged.
- Method according to any one of claims 1 to 3, characterised in that the sum of the roll diameters of all vertically exchange rolls of an exchange set corresponds almost or entirely with the maximum or minimum diameter of the work roll (3) to be exchanged.
- Method according to any one of claims 1 to 4, characterised in that the first additional roll (6) has a larger diameter than the work roll (3') of the exchange set and preferably the second additional roll (7) has a diameter corresponding with the work roll (3') of the exchange set.
- Roll arrangement for carrying out the method according to any one of claims 1 to 5, as exchange set for changing a roll configuration in a roll stand comprising at least two work rolls (3), wherein for a change in configuration at least one work roll (3) of the roll stand is exchanged for a roll arrangement as exchange set, the roll arrangement comprising a work roll (3') and first and second additional rolls (6, 7), which are mounted in a common cassette (5), wherein the cassette (5) comprises two bearing housings for the work roll (3') and the additional rolls (6, 7), which each have an outer contour substantially corresponding with that of the work roll chocks (4) of the roll stand, and wherein the work roll (3') as well as the first and second additional rolls (6, 7) are arranged vertically one above the other in the installed position of the cassette (5).
- Roll arrangement according to claim 6, characterised in that the second additional roll (7) and the work roll (3') of the exchange set have approximately the same diameter (10).
- Roll arrangement according to one of claims 6 and 7, characterised in that the first additional roll (6) has a larger diameter than the work roll (3') of the exchange set.
- Roll arrangement according to any one of claims 6 to 8, characterised in that the first additional roll (6) is driven.
- Roll arrangement according to any one of claims 6 to 9, characterised in that the exchange set comprises backing rollers (8) and/or support bearings, which laterally support the work roll (3') and/or the first and second additional rolls (6, 7).
- Roll arrangement according to any one of claims 6 to 10, characterised in that the driven roll of the exchange set is provided with a drive journal adapter (9).
- Roll arrangement according to any one of claims 6 to 11, characterised in that the cassette (5) is constructed to be rotationally symmetrical about a longitudinal centre axis.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019220327.2A DE102019220327A1 (en) | 2019-12-20 | 2019-12-20 | Method for changing a roll configuration in a roll stand and roll arrangement |
PCT/EP2020/084786 WO2021122074A1 (en) | 2019-12-20 | 2020-12-07 | Method for changing a roll configuration in a roll stand and roll arrangement |
Publications (3)
Publication Number | Publication Date |
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EP4076778A1 EP4076778A1 (en) | 2022-10-26 |
EP4076778B1 true EP4076778B1 (en) | 2023-08-23 |
EP4076778C0 EP4076778C0 (en) | 2023-08-23 |
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ID=73790072
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Application Number | Title | Priority Date | Filing Date |
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EP20821155.7A Active EP4076778B1 (en) | 2019-12-20 | 2020-12-07 | Method for changing a roll configuration in a roll stand and roll arrangement |
Country Status (5)
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---|---|
EP (1) | EP4076778B1 (en) |
JP (1) | JP7295340B2 (en) |
CN (1) | CN114829030B (en) |
DE (1) | DE102019220327A1 (en) |
WO (1) | WO2021122074A1 (en) |
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- 2019-12-20 DE DE102019220327.2A patent/DE102019220327A1/en active Pending
-
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- 2020-12-07 WO PCT/EP2020/084786 patent/WO2021122074A1/en active Search and Examination
- 2020-12-07 CN CN202080088535.2A patent/CN114829030B/en active Active
- 2020-12-07 JP JP2022537476A patent/JP7295340B2/en active Active
- 2020-12-07 EP EP20821155.7A patent/EP4076778B1/en active Active
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DE102019220327A1 (en) | 2021-06-24 |
JP7295340B2 (en) | 2023-06-20 |
CN114829030B (en) | 2024-01-30 |
JP2023508899A (en) | 2023-03-06 |
EP4076778C0 (en) | 2023-08-23 |
CN114829030A (en) | 2022-07-29 |
WO2021122074A1 (en) | 2021-06-24 |
EP4076778A1 (en) | 2022-10-26 |
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