EP4247573A1 - Dispositif de laminage destiné au laminage de bandes métalliques, système de laminage à utiliser dans un tel dispositif de laminage et procédé de transformation d'un dispositif de laminage - Google Patents

Dispositif de laminage destiné au laminage de bandes métalliques, système de laminage à utiliser dans un tel dispositif de laminage et procédé de transformation d'un dispositif de laminage

Info

Publication number
EP4247573A1
EP4247573A1 EP21782464.8A EP21782464A EP4247573A1 EP 4247573 A1 EP4247573 A1 EP 4247573A1 EP 21782464 A EP21782464 A EP 21782464A EP 4247573 A1 EP4247573 A1 EP 4247573A1
Authority
EP
European Patent Office
Prior art keywords
roll
work roll
work
arrangement
chocks
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP21782464.8A
Other languages
German (de)
English (en)
Inventor
Edgar Filk
Markus GÜMPEL
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMS Group GmbH
Original Assignee
SMS Group GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SMS Group GmbH filed Critical SMS Group GmbH
Publication of EP4247573A1 publication Critical patent/EP4247573A1/fr
Pending legal-status Critical Current

Links

Classifications

    • 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
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P6/00—Restoring or reconditioning objects
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2267/00—Roll parameters
    • B21B2267/02—Roll dimensions
    • B21B2267/06—Roll diameter

Definitions

  • Rolling device for rolling metal strips, roll arrangement for use in such a rolling device and method for converting a rolling device
  • the invention relates to a rolling device for rolling metal strips, comprising at least a first and a second work roll, which define a roll gap between them, and at least a first and a second back-up roll, the work rolls being mounted in work roll chocks and the back-up rolls being mounted in back-up roll chocks in a common roll stand are.
  • the invention is therefore based on the object of providing a rolling device of the type mentioned, which with relatively simple means that high-strength and thin metal strips can be rolled with a high reduction in thickness.
  • the invention is also based on the object of providing a rolling device that can be converted relatively easily for different requirements.
  • One aspect of the invention relates to a rolling apparatus for rolling metal strips comprising at least a first and a second work roll, which define a roll gap between them, and at least a first and a second back-up roll, wherein at least one work roll in work roll chocks and the back-up rolls in back-up roll chocks in one common roll stand, the work roll chocks being designed in such a way that the first and/or the second work roll can each be exchanged for a roll arrangement which has a work roll with a smaller diameter and at least one additional roll, the work roll with the smaller diameter being above the additional roll the back-up roll is supported in back-up roll chocks, and the smaller diameter work roll is disposed in work-roll bearings of the back-up roll chocks.
  • the rolling device in such a way that a given pair of work rolls of the roll stand with larger roll diameters can be converted in such a way that one and/or both work rolls can be replaced by a work roll with a smaller diameter and an additional roll.
  • various configurations of the rolling device can be implemented.
  • a symmetrical work roll pairing with smaller work rolls is thereby achieved overall, with which a relatively high thickness reduction can already be achieved.
  • the position of this work roll can be precisely defined both axially and vertically in relation to the additional roll and/or in relation to the work roll interacting with it to form the roll gap.
  • particularly stable rolling conditions are established. Due to the positional stability not only during rolling, but also when changing the rolls, the pairing of the working rolls can be set particularly easily.
  • the invention is also particularly suitable for modernizing an existing plant to expand the product range.
  • the position of the work roll bearings within the roll arrangement is preferably adjustable and thus also the position of the work roll with the smaller diameter.
  • the work roll bearings fulfill the function of smaller “work roll chocks” that can be displaced within the additional roll chocks and with them.
  • the position of the work roll bearings is particularly preferably adjustable axially and/or transversely to the longitudinal extent of the roll gap.
  • an adjustment can be necessary, for example, to set a so-called offset.
  • This is understood to mean an axial center offset or offset of the longitudinal center axis of the additional roll on the one hand and the longitudinal center axis of the work roll on the other hand, which is intended to improve the stability of the arrangement against horizontal deflection.
  • an offset can be set by means of wear plates or shims of different thicknesses, which are provided in pockets or recesses in the work roll chocks of the roll arrangement.
  • hydraulic piston-cylinder arrangements can be provided for this.
  • the work roll bearings may be supported on viscoelastic buffers which lift the work roll of the roll assembly from the back-up roll once unloaded, thereby avoiding surface contact between the work roll and the back-up roll of the roll assembly during assembly and disassembly of the roll assembly.
  • either the first or the second work roll is replaced by a roll arrangement with a work roll with a smaller diameter and an additional roll.
  • a rolling device is particularly preferably provided which comprises a first, upper work roll with a relatively large diameter and a lower roll arrangement with a work roll with a smaller diameter.
  • Such a diameter ratio of the work rolls is advantageous in that a rolling result can be achieved that corresponds to a pass with a pair of work rolls in which the diameter of each work roll corresponds to the arithmetic mean of the diameters of a larger and a smaller work roll.
  • the additional roll preferably has a larger diameter than the working roll of the roll arrangement.
  • the first or the second work roll is designed as a work roll with a smaller or larger diameter and that the work roll with the smaller diameter has a diameter that is less than or equal to half the diameter of the large work roll.
  • the rolling device according to the invention is expediently designed such that the additional roll chocks of the roll arrangement have an outer contour which approximately corresponds to the outer contour of the work roll chocks for a single work roll with a larger diameter.
  • This configuration ensures, in particular, that the rolling device can be easily converted. It can thus be ensured that the additional roll chocks of the roll arrangement can be exchangeably accommodated in the installation space of the work roll chocks within the roll stand of the rolling device. No conversion work is required within the scaffolding area.
  • the inventive configuration of the roller assembly which is designed as an independent functional unit, can be a roll change that is also a configuration change at the same time, can be implemented quickly and easily using conventional means, preferably fully automated.
  • the work roll with the smaller diameter is supported along at least part of the roll barrel on one side or on both sides. Smaller diameter work rolls tend to bow transversely to the direction of strip travel across the barrel length transverse to its longitudinal axis.
  • first or second work roll is movably mounted in the additional roll chocks of the roll arrangement transversely to the axis of rotation and is supported on at least one side parallel to the axis of rotation over at least part of its length by means of at least one hydrostatic support bearing.
  • the offset can also be adjusted using the hydrostatic support bearing.
  • the hydrostatic support bearing has a dual function. It compensates for the deflection of the small work roll and adjusts the axial position of the axis of rotation of the work roll relative to the axis of rotation of the auxiliary roll.
  • a lateral seal of the bearing shell serves the purpose of ensuring a constant pressure of the hydraulic medium between the bearing shell and the work roll to maintain.
  • the rolling emulsion or rolling oil usually used for roll cooling and roll lubrication can be considered as the hydraulic medium.
  • the supporting shell is set and/or held against the work roll by at least one, preferably hydraulic, setting device.
  • the adjusting device can be provided as an additional device or external device on the rolling device.
  • At least one guide element provided on the rolling device or in the rolling train for the rolling stock can be provided or designed as the adjusting device.
  • At least one adjusting device is provided in a movable table or belt deflector assigned to the rolling device and arranged on the inlet and/or outlet side. It makes sense to integrate a screwdown device in each control table for the rolling stock.
  • the invention further relates to a roll arrangement for use in a rolling device for rolling metal sheets of the type described above.
  • the roll arrangement comprises at least one additional roll and at least one work roll, the auxiliary roll in
  • the work roll bearings in the additional roll chock can be adjusted transversely and/or vertically.
  • Figure 4 is a perspective view of the roller assembly according to the invention.
  • FIG. 5 shows a perspective view of the rolling device according to FIG. 4 viewed from the drive side
  • the rolling device 1 comprises a roll stand 2 with a roll stand 3, within which an upper (large) work roll 4 is mounted in upper work roll chocks 5 and a lower (small) work roll 6 in and an additional roll 8.
  • a roll gap W is formed between the work rolls 4.6, through which the rolling stock, not shown, is passed in the form of a metal strip.
  • the rolling device 1 comprises, in a known manner, both bending cylinders and balancing cylinders, with which bending of the work rolls and the weight of the back-up rolls can be compensated. For reasons of simplification, these devices are not shown in the drawings. Furthermore, the rolling device according to the invention comprises means for the axial displacement of the work rolls 4,6, which are also not shown in the drawings for reasons of simplification.
  • An axial displacement or adjustment within the meaning of this patent application is to be understood as a displacement in the direction of the longitudinal axis of the rolls in question.
  • a vertical displacement or adjustment within the meaning of this patent application is to be understood as an adjustment transverse to the longitudinal extent of the roll gap W.
  • the upper work roll 4 is supported against an upper backup roll 11, whereas the lower work roll 6 is supported against a lower auxiliary roll 8.
  • the additional roller 8 is supported against a lower support roller 12 .
  • the upper backup roller 11 is in upper
  • the work rolls 4, 6 bring about a reduction in the thickness of the rolling stock in a manner known per se.
  • the rolling device 1 according to the invention is preferably designed as a device for cold-rolling metal strips and designed for a relatively large reduction in thickness.
  • both the upper backup roll chock 13 and the lower backup roll chock 14 are subjected to a force parallel to their longitudinal center axes within the roll stand 3 by means of known pusher cylinders 15, which counteracts a lateral deflection of the backup rolls 11, 12.
  • Such stabilization is particularly advantageous because of the odd number of rolls in the set of rolls.
  • an offset (longitudinal center offset) of the longitudinal center axes of the support rollers 11, 12 can be adjusted in a known manner to the longitudinal center axes of the work rolls 4, 6 set. Due to the possible variable offset directions, the directions of action of the pusher cylinders 15 must be recalculated for each application and load case. This takes place via a control unit S of the rolling device 1 .
  • the rolling device 1 In the configuration of the rolling device 1 shown in FIG. 1, it is provided that the lower work roll 6 has approximately half the diameter of the upper work roll 4 .
  • the diameter of the additional roll 8 is slightly smaller than the diameter of the upper work roll 4.
  • the rolling device 1 according to the invention can be converted between different configurations with different pairs of rolls. This has the advantage that a rolling device 1 with a pair of rollers for rolling less strong strips with a relatively small reduction in thickness can be converted with simple means if higher-strength and thinner strips made of special alloys or with a greater reduction in thickness are to be rolled.
  • the additional roll chock 7 also has receptacles for viscoelastic buffers 27 in the lower area of the pocket 26, which lift the small work roll 6 with the associated work roll bearings 9 as soon as they are free of load. This ensures that when the rolls are changed, there is no surface contact between the work roll 6 and the additional roll 8 that could impair the surface quality of the smaller work roll 6 .
  • the rolling emulsion can, for example, be circulated through the hydrostatic bearing 17 with a volume flow of approx. 1000 l/min as a medium for pressure supply.
  • the rolling device 1 comprises, at least on one side, a guide table 19 for guiding the rolling stock.
  • the guide level of the control table 19 extends approximately at the height of the lateral surface of the lower work roll 6.
  • means for adjusting and/or centering a support shell 18 of the hydrostatic bearing 17 in the form of a control beam 20 are provided on the control table 19, which can be moved relatively by means of feed cylinders 21 to the control table 19 is slidably arranged.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)

Abstract

L'invention concerne un dispositif de laminage (1) destiné au laminage de bandes métalliques comprenant au moins un premier et un deuxième rouleau de travail (4,6,6') qui définissent entre eux une emprise (W), et au moins un premier et un deuxième rouleau d'appui (11,12), au moins un rouleau de travail (4,6') étant monté dans des empoises pour rouleaux de travail (5,9') et les rouleaux d'appui (11,12) étant montés dans des empoises pour rouleaux d'appui (13,14) dans une cage de laminoir (2) commune, les empoises pour rouleaux de travail (5,9') étant conçues de manière à ce que le premier et/ou le deuxième rouleau de travail (4,6') soient respectivement remplaçables par un système de rouleaux (10) qui présente un rouleau de travail (6) de diamètre inférieur et au moins un rouleau supplémentaire (8), le rouleau de travail (6) de diamètre inférieur étant soutenu par le rouleau supplémentaire (8), le rouleau supplémentaire étant monté des empoises pour rouleau supplémentaire (7) et le rouleau de travail de diamètre inférieur étant monté dans des coussinets pour rouleau de travail (9) des empoises pour rouleau supplémentaire (7). L'invention concerne également un système de laminage (10) à utiliser dans un tel dispositif de laminage (1) et un procédé de transformation d'un dispositif de laminage (1).
EP21782464.8A 2020-11-17 2021-09-20 Dispositif de laminage destiné au laminage de bandes métalliques, système de laminage à utiliser dans un tel dispositif de laminage et procédé de transformation d'un dispositif de laminage Pending EP4247573A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020214383.8A DE102020214383A1 (de) 2020-11-17 2020-11-17 Walzvorrichtung zum Walzen von metallenen Bändern, Walzenanordnung zur Verwendung in einer solchen Walzvorrichtung sowie Verfahren zum Umrüsten einer Walzvorrichtung
PCT/EP2021/075740 WO2022106093A1 (fr) 2020-11-17 2021-09-20 Dispositif de laminage destiné au laminage de bandes métalliques, système de laminage à utiliser dans un tel dispositif de laminage et procédé de transformation d'un dispositif de laminage

Publications (1)

Publication Number Publication Date
EP4247573A1 true EP4247573A1 (fr) 2023-09-27

Family

ID=77989783

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21782464.8A Pending EP4247573A1 (fr) 2020-11-17 2021-09-20 Dispositif de laminage destiné au laminage de bandes métalliques, système de laminage à utiliser dans un tel dispositif de laminage et procédé de transformation d'un dispositif de laminage

Country Status (6)

Country Link
US (1) US20230415211A1 (fr)
EP (1) EP4247573A1 (fr)
JP (1) JP2023550065A (fr)
CN (1) CN116457116A (fr)
DE (1) DE102020214383A1 (fr)
WO (1) WO2022106093A1 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4531394A (en) * 1982-03-26 1985-07-30 T. Sendzimir, Inc. Six-high rolling mills
US5842368A (en) * 1996-02-23 1998-12-01 Achenbach Buschhutten Gmbh Multiroll stand
FR2846579B1 (fr) * 2002-11-05 2006-05-05 Vai Clecim Procede pour elargir la gamme de production d'une installation de laminage de produits metalliques et installation pour la mise en oeuvre du procede

Also Published As

Publication number Publication date
CN116457116A (zh) 2023-07-18
US20230415211A1 (en) 2023-12-28
JP2023550065A (ja) 2023-11-30
WO2022106093A1 (fr) 2022-05-27
DE102020214383A1 (de) 2022-05-19

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