EP4257259A1 - Train de rouleaux d'un laminoir pourvu de rouleaux de guidage latéraux améliorés - Google Patents

Train de rouleaux d'un laminoir pourvu de rouleaux de guidage latéraux améliorés Download PDF

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Publication number
EP4257259A1
EP4257259A1 EP22166643.1A EP22166643A EP4257259A1 EP 4257259 A1 EP4257259 A1 EP 4257259A1 EP 22166643 A EP22166643 A EP 22166643A EP 4257259 A1 EP4257259 A1 EP 4257259A1
Authority
EP
European Patent Office
Prior art keywords
roller table
guide rollers
side guide
treatment device
metal strip
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
EP22166643.1A
Other languages
German (de)
English (en)
Inventor
Heinz Fürst
Roman Winkler
Gero Schwarz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Primetals Technologies Austria GmbH
Original Assignee
Primetals Technologies Austria GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Primetals Technologies Austria GmbH filed Critical Primetals Technologies Austria GmbH
Priority to EP22166643.1A priority Critical patent/EP4257259A1/fr
Publication of EP4257259A1 publication Critical patent/EP4257259A1/fr
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/14—Guiding, positioning or aligning work

Definitions

  • roller tables and the associated rolling mills are well known. As an example, you can refer to: JP H11 216 516 A to get expelled.
  • Such roller tables are often used to guide a hot metal strip laterally, for example between a roughing stand and a multi-stand finishing train.
  • the contact of the hot metal strip with the side guide rollers causes wear on the side guide rollers. Due to different belt thicknesses, greater wear occurs at the lower ends of the side guide rollers than at the upper ends of the side guide rollers. The difference in wear can be so great that the side guide rollers become very uneven and, in extreme cases, even steps appear. In principle, this applies regardless of whether the side guide rollers are placed on the metal strip in a force-controlled manner (i.e. with a predetermined force) or in a position-controlled manner (i.e. at a predetermined position).
  • the problem occurs to a particularly great extent in force-controlled employment. Due to wear and tear, the side guide rollers must be regularly maintained and sometimes replaced. This is associated with downtime and therefore reduces the productivity of the rolling mill.
  • the object of the present invention is to create options by which the disadvantages of the prior art can be avoided.
  • roller table with the features of claim 1.
  • Advantageous configurations of the roller table are the subject of dependent claims 2 to 5.
  • a roller table of the type mentioned at the outset is designed in that the lateral guide rollers are assigned adjustment drives, by means of which the lateral guide rollers are positioned orthogonally to the transport direction and orthogonally Adjustment direction oriented to the first axes of rotation can be adjusted between two end positions.
  • the side guide rollers can be designed like a truncated cone.
  • the second axes of rotation are oriented at an angle to the adjustment direction within a plane orthogonal to the transport direction.
  • the side guide rollers are preferably cylindrical and the second axes of rotation are also oriented parallel to the adjustment direction. This configuration is particularly simple, reliable and also particularly low-wear.
  • a travel distance between the end positions must be sufficiently large.
  • the travel distance is preferably at least 150 mm, in particular at least 200 mm. Even larger values are possible, for example a travel distance of 250 mm or 300 mm.
  • the lateral surfaces of the side guide rollers, viewed in the adjustment direction, must extend over an area that is larger than the travel path by at least the maximum strip thickness.
  • the side guide rollers are arranged between two immediately successive transport rollers.
  • the side guide rollers are therefore arranged in the gap between two immediately successive transport rollers. This makes it particularly easy to move the side guide rollers in the adjustment direction. Furthermore, the required large travel distance of 150 mm and more can be easily achieved.
  • the side guide rollers are preferably moved cyclically between the two end positions.
  • a control device can be present which controls the adjustment devices accordingly.
  • the movement of the side guide rollers can take place in particular during normal operation of the roller table, while a metal strip is passing over the transport rollers is transported. This is even possible if the side guide rollers also rest against the side edges of the metal strip during the movement of the side guide rollers. This makes it possible to use the roller table according to the invention in an endless casting and rolling mill.
  • the roller table is designed as a roller table according to the invention.
  • the rear treatment device downstream of the roller table is a roll stand, in particular the front roll stand of a multi-stand rolling train, for example a finishing train.
  • the front treatment device arranged upstream of the roller table is usually also a rolling stand, in particular a rough rolling stand.
  • the front treatment device can in turn be preceded by a further treatment device, in particular a continuous casting machine.
  • a continuous casting machine can also be installed directly upstream of the roller table as a front treatment device.
  • front treatment device and the rear treatment device can be connected by the metal band.
  • the metal strip is therefore undivided between the front treatment device and the rear treatment device. A coupled process is therefore carried out.
  • a rolling mill has a front treatment device 1, a rear treatment device 2 and a roller table 3.
  • the roller table 3 is arranged between the two treatment devices 1, 2.
  • the two treatment devices 1, 2 can be designed as required.
  • the front treatment device 1 can be designed as a reel, as a continuous casting machine or as an oven.
  • the front treatment device 1 is often designed as a rolling stand, for example as a rough rolling stand.
  • the rear treatment device 2 can be designed, for example, as a reel, as a pickling or as a cooling section.
  • the rear treatment device 2 is designed as a rolling stand.
  • the rear treatment device 2 is usually the front rolling stand of a multi-stand rolling train, for example a multi-stand finishing train.
  • the other rolling stands of the multi-stand rolling mill are in the FIGS. 1 and 2 only shown, but not provided with reference numbers. Furthermore, only the work rolls of all the rolling stands are shown. As a rule, however, the rolling stands also have additional rollers.
  • the roller table 3 has a large number of transport rollers 4.
  • the transport rollers 4 are seen in a transport direction x arranged one behind the other.
  • the transport direction x is generally horizontal or at least almost horizontal.
  • the transport rollers 4 can be rotated about first axes of rotation 5.
  • the first axes of rotation 5 run orthogonally to the transport direction x. As a rule, they are also oriented horizontally or at least almost horizontally. Of the first axes of rotation 5 are in the FIGS. 1 and 2 For the sake of clarity, only some of them are given their respective reference numbers.
  • At least some of the transport rollers 4 are driven. This is in FIG 2 for some of the transport rollers 4 indicated by a respective drive 6. However, whether and if so which of the transport rollers 4 are driven is of minor importance in the context of the present invention.
  • a metal strip 7 can be transported from the front treatment device 1 to the rear treatment device 2.
  • the front treatment device 1 is therefore arranged upstream of the roller table 3, and the rear treatment device 2 is arranged downstream of the roller table 3.
  • the metal strip 7 is usually a hot metal strip. It can be made of steel or aluminum, for example.
  • the front treatment device 1 and the rear treatment device 2 are connected by the metal band 7. The mass flow of the front treatment device 1 and the rear treatment device 2 are therefore directly coupled to one another in these cases.
  • the roller table 3 also has side guide rollers 8.
  • the side guide rollers 8 can be part of larger side guides. However, this is of minor importance in the context of the present invention.
  • the side guide rollers 8 are generally used in pairs, that is, one side guide roller 8 each on the left and right of the metal strip 7.
  • the number of pairs of side guide rollers 8 can be determined as needed.
  • the representation in the FIGS. 1 and 2 according to which there are two such pairs, is to be understood as purely exemplary and not restrictive.
  • the side guide rollers 8 can be rotated about second axes of rotation 9.
  • the side guide rollers 8 are usually freely rotatable.
  • the side guide rollers 8 can also be adjusted laterally to the metal strip 7 by means of positioning devices 10.
  • the positioning devices 10 can be designed, for example, as electric drives or as hydraulic cylinder units. Regardless of the specific design, the side guide rollers 8 can be placed on the metal strip 7 in a force-controlled or position-controlled manner using the positioning devices 10.
  • the side guide rollers 8 point accordingly FIG 3 Lateral surfaces 11.
  • the lateral surfaces 11 of the side guide rollers 8 rest on side edges 12 of the metal strip 7. When transporting the metal strip 7, they roll off the side edges 12 of the metal strip 7.
  • Adjustment drives 13 are assigned to the side guide rollers 8. By means of the adjustment drives 13, the side guide rollers 8 can be adjusted in an adjustment direction z.
  • the adjustment direction z is oriented orthogonally to the transport direction x and also orthogonally to the first axes of rotation 5. According to the usual orientation of the transport direction x and the first axes of rotation 5, the adjustment direction z is usually oriented vertically or at least almost vertically.
  • the type of adjustment drives 13 can be determined as required.
  • the adjustment drives 13 are usually hydraulic cylinder units. Alternatively, it can be, for example, screw jacks or wedge adjustments. Other configurations are also possible.
  • the side guide rollers 8 are as shown in FIGS. 1 and 2 preferably arranged between two immediately successive transport rollers 4, viewed in the transport direction x.
  • the side guide rollers 8 are therefore arranged in the gap between two immediately successive transport rollers 4. If some of the transport rollers 4 are driven and other of the transport rollers 4 are not driven and furthermore lateral guide rollers 8 are not arranged between all immediately successive transport rollers 4, the lateral guide rollers 8 are preferably arranged between two non-driven transport rollers 4. If necessary, the distance between two immediately successive transport rollers 4, between which side guide rollers 8 are arranged, can be slightly larger than the distance between two immediately successive transport rollers 4, between which no side guide rollers 8 are arranged.
  • FIG 3 is a diameter D that the side guide rollers 8 have on their upper edge 14 is equal to a diameter D that the side guide rollers 8 have on their lower edge 15. Consequently, the side guide rollers 8 are not truncated conical, but cylindrical. It can also be seen that the second axes of rotation 9 are oriented parallel to the adjustment direction z. In the adjustment direction z, the side guide rollers 8 extend over a length L. This is in FIG 3 only shown for the left side guide roller 8 there. An analogous situation applies to the right side guide roller 8.
  • FIG 4 shows a position p of the position of the lower edges 15 of the side guide rollers 8.
  • the zero line corresponds to a positioning in which, viewed in the adjustment direction z, the position of the lower edges 15 of the side guide rollers 8 corresponds to the position of the upper edges 16 of the transport rollers 4.
  • the position of the lower edges 15 of the side guide rollers 8 corresponds to the position of the upper edges 16 of the transport rollers 4.
  • the lower edges 15 of the side guide rollers 8 are below the upper edges 16 of the transport rollers 4, this corresponds to a negative value of the position p.
  • the upper edges 14 and the lower edges 15 of the side guide rollers 8 and the upper edges 16 of the transport rollers 4 are in FIG 3 only shown on the right side. Analogous circumstances apply to the left side.
  • the side guide rollers 8 can be moved between a lower end position (p minimal, i.e. negative and as large as possible in terms of magnitude) and an upper end position (negative and smaller in magnitude than the lower end position, but at most exactly 0).
  • the travel path i.e. the difference between the lower end position and the upper end position, is preferably at least 150 mm, in particular at least 200 mm. Of course, larger values are also possible, for example 250 mm or 300 mm.
  • the metal band 7 points according to FIG 1 a strip thickness d when passing through the roller table 3.
  • the strip thickness d can have a maximum value dmax, i.e. a maximum strip thickness dmax.
  • the maximum strip thickness dmax is usually in the range between 20 mm and 100 mm. For example, it can be between 30 mm and 80 mm, in particular between 40 mm and 60 mm.
  • the length L of the lateral surfaces 11 in the adjustment direction z must be so large that the lateral surfaces 11 extend over an area that is larger than the travel path by at least the maximum strip thickness dmax.
  • the side guide rollers 8 move cyclically between the two end plates. Although this is preferred, it is not mandatory.
  • the period T - i.e. the duration of a single cycle - is usually in the range of 10 seconds and 20 minutes. However, other values are also possible, in particular values above 20 minutes.
  • the movement of the side guide rollers 8 can take place in particular during normal operation of the roller table 3, while a metal strip 7 is being transported via the transport rollers 4. This is even possible while the side guide rollers 8 (more precisely: their lateral surfaces 11) are in contact with the side edges 12 of the metal strip 7.
  • FIG 5 shows a modification of the rolling mill of FIG 1 .
  • the front treatment device 1 is preceded by a further treatment device 17.
  • the further treatment device 17 can be, for example, an oven.
  • the further treatment device 17 is designed as a continuous casting machine.
  • Roller table 3 is in FIG 5 only shown as such, i.e. without showing its individual components. In this regard, it will be discussed FIG 1 referred.
  • the metal strip 7 it is possible for the metal strip 7 to extend (additionally: undivided) not only from the front to the rear treatment device 1, 2, but also from the further treatment device 17. In this case, not only the front and the rear treatment device 1, 2, but also the further treatment device 17 is connected by the metal strip 7. The mass flows of the three treatment devices 1, 2 and 17 mentioned are therefore directly coupled to one another.
  • the present invention has many advantages. In this way, the unavoidable wear of the side guide rollers 8 can be distributed over a correspondingly enlarged lateral surface 11, so that as a result a significantly longer service life of the side guide rollers 8 is achieved. Furthermore, the roller table 3 can be used universally, ie not only in a conventional rolling mill in which individual slabs are rolled, but also in a casting-roll composite plant in which endless rolling is carried out from the casting heat he follows. Particularly in such systems, the side guide rollers 8 must remain engaged on the hot metal strip 7 for several hours without a cooling break. Due to the arrangement between successive transport rollers 4, a large travel path in the adjustment direction z can be achieved in a simple manner.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
EP22166643.1A 2022-04-05 2022-04-05 Train de rouleaux d'un laminoir pourvu de rouleaux de guidage latéraux améliorés Pending EP4257259A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22166643.1A EP4257259A1 (fr) 2022-04-05 2022-04-05 Train de rouleaux d'un laminoir pourvu de rouleaux de guidage latéraux améliorés

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22166643.1A EP4257259A1 (fr) 2022-04-05 2022-04-05 Train de rouleaux d'un laminoir pourvu de rouleaux de guidage latéraux améliorés

Publications (1)

Publication Number Publication Date
EP4257259A1 true EP4257259A1 (fr) 2023-10-11

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Application Number Title Priority Date Filing Date
EP22166643.1A Pending EP4257259A1 (fr) 2022-04-05 2022-04-05 Train de rouleaux d'un laminoir pourvu de rouleaux de guidage latéraux améliorés

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11216516A (ja) 1998-01-28 1999-08-10 Mitsubishi Heavy Ind Ltd サイドガイド装置
JP2015062915A (ja) * 2013-09-24 2015-04-09 東芝三菱電機産業システム株式会社 サイドガイド装置
KR20150076021A (ko) * 2013-12-26 2015-07-06 현대제철 주식회사 소재 이송장치
EP3552723A1 (fr) * 2018-04-12 2019-10-16 Primetals Technologies Austria GmbH Dispositif et procédé de guidage de bandes métalliques pourvues d'éléments d'usure au moyen de l'élément de support

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11216516A (ja) 1998-01-28 1999-08-10 Mitsubishi Heavy Ind Ltd サイドガイド装置
JP2015062915A (ja) * 2013-09-24 2015-04-09 東芝三菱電機産業システム株式会社 サイドガイド装置
KR20150076021A (ko) * 2013-12-26 2015-07-06 현대제철 주식회사 소재 이송장치
EP3552723A1 (fr) * 2018-04-12 2019-10-16 Primetals Technologies Austria GmbH Dispositif et procédé de guidage de bandes métalliques pourvues d'éléments d'usure au moyen de l'élément de support

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