EP1918035A1 - Système de nivellement de tension d'une bande métallique - Google Patents

Système de nivellement de tension d'une bande métallique Download PDF

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Publication number
EP1918035A1
EP1918035A1 EP07020017A EP07020017A EP1918035A1 EP 1918035 A1 EP1918035 A1 EP 1918035A1 EP 07020017 A EP07020017 A EP 07020017A EP 07020017 A EP07020017 A EP 07020017A EP 1918035 A1 EP1918035 A1 EP 1918035A1
Authority
EP
European Patent Office
Prior art keywords
levelling
roll
internal
internal cavity
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.)
Granted
Application number
EP07020017A
Other languages
German (de)
English (en)
Other versions
EP1918035B1 (fr
Inventor
Serafino Cozzi
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.)
Selema Srl
Original Assignee
Selema Srl
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 Selema Srl filed Critical Selema Srl
Publication of EP1918035A1 publication Critical patent/EP1918035A1/fr
Application granted granted Critical
Publication of EP1918035B1 publication Critical patent/EP1918035B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
    • B21D1/05—Stretching combined with rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/02—Shape or construction of rolls
    • B21B27/03—Sleeved rolls
    • B21B27/05—Sleeved rolls with deflectable sleeves
    • 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
    • B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
    • B21B39/08—Braking or tensioning arrangements

Definitions

  • the present invention refers to a tension levelling system of a metal strip in particular having thickness included from 0 to 1 mm.
  • the known tension levelling systems provided of at least a levelling roll which is provided of an elastically expandable internal cavity through insertion within the same one of a pressurized fluid, they do not allow a fine levelling in the case of a metal strip having planarity defects in one or more transversal portions of the same one.
  • Objective of the present invention is that to realize a tension levelling system of a metal strip that allows the levelling of one or more transversal portions of said same metal strip.
  • Another objective is that to realize a tension levelling system of a metal strip that allows an increase of the levelling in transversal direction of the same metal strip.
  • Another objective is that to realize a tension levelling system of a metal strip which avoids the breaking of the same metal strip also in the case of metals which show a brittle behaviour.
  • Yet another objective is that to have a tension levelling system of a metal strip which allows a constant levelling of the metallic strip in transversal direction also with the vary of the feeding speed of the same one.
  • tension levelling system 10 of a metal strip 14 able to work also metal strip which shows a brittle behaviour avoiding the breaking of the same, as for example hardened aluminium alloys.
  • Said tension levelling system 10 comprises at least a couple of levelling rolls 50 of which at least one having an internal cavity 55 elastically expandable through insertion into the same of a pressurized fluid.
  • said at least a levelling roll 50 provided with an internal cavity 55 comprises advantageously sealing means suitable to divide said internal cavity 55 in a plurality of chambers 60 each of which is expandable in independent way through insertion of a pressurized fluid.
  • Said sealing means comprise preferably a plurality of sealing elements 71 suitable to divide said internal cavity 55 in said plurality of chambers 60.
  • said plurality of sealing elements 71 is a plurality of annular gaskets.
  • sealing means comprise preferably a plurality of retaining element 72 each of which is in particular associated to a correspondent sealing element 71 in order to avoid the extrusion of the same within said internal cavity 55.
  • sealing means comprise at least a couple of annular gaskets 73 which preferably are positioned respectively in proximity of a first and a second extremity of said internal cavity 55.
  • said plurality of chambers 60 is positioned along a transversal direction 15 within said internal cavity 55.
  • said at least a levelling roll 50 provided with internal cavity 55 comprises a plurality of input/output ducts 62 for a pressurized fluid every of which it is respectively connected to a chamber 60 so that to be able to expand the same independently from the other chambers 60.
  • said plurality of input/output ducts 62 is connected to a pump 80 of which said tension levelling system 10 is preferably provided.
  • said levelling roll 50 also include a plurality of electrovalves 65 connected to a command and control system, not shown, each of which allows when activated the passage of a pressurized fluid within a correspondent input/output duct 62 in such way to make expand a correspondent chamber 60.
  • Each chamber 60 is expandable in independent way from the others through a pressurized fluid and it is able to elastically deform a correspondent external portion 56 of said levelling roll 50 in such way to modified an external profile 57 of the same.
  • each chamber 60 shows an annular form substantially axial symmetric respect to the axis of said levelling roll 50 provided with internal cavity 55.
  • said levelling roll 50 provided with internal cavity 55 include an internal roll 51 and a tubular mantle 53 which is shrinked on said inside roll 51 so that to define said internal cavity 55.
  • Said internal roll 51 includes preferably a plurality of seats 54 suitable to house respectively a correspondent sealing element of said plurality of sealing elements 71.
  • said plurality of seats 54 is preferably a plurality of annular grooves obtained on an external surface 52 of said internal roll 51, which are in particular uniformly distributed on said same external surface 52.
  • said internal roll 51 comprise a plurality of helical grooves 66 obtained respectively within each chamber 60 on said external surface 52 of said same internal roll 51 in order to allow a best distribution of said pressurized fluid within each same chamber 60.
  • said at least a levelling roll 50 provided with internal cavity 55 includes two sealing flanges 59 which are in particular made integral to said internal roll 51 and besides they constrain axially said mantle 53 avoiding therefore a disassembly of the same respect to said internal roll 51 in the case in which one or more chambers 60 are activated in expansion.
  • said at least a levelling roll 50 provided with internal expandable cavity 55 comprises at least a couple of recovery conduit 64 of said pressurized fluid preferably positioned in proximity of the extremities of said internal cavity 55.
  • said tension levelling system 10 includes at least a couple of levelling rolls 50 both provided respectively of an expandable cavity 55 having one or more features of the type previously described.
  • said at least a levelling roll 50 provided with internal expandable cavity 55 are two levelling rolls provided of an internal cavity 55 both having one o more features of the type previously described.
  • said system 10 includes preferably a plurality of tension rolls, not shown, that sets in tension said metal strip 14 maintaining the level of stress on the same in elastic field.
  • tension levelling system 10 includes preferably a plurality of stretching rolls 30 which increase the level of stress on said metal strip 14 in order to arrive to a level of stress correspondent to the stress limit in elastic field.
  • Said levelling system 10 includes besides regulating means of the level of stress which reduce in case of increase of the level of stress on the metal strip 14 the same stress.
  • said regulating means of the level of stress are suitable to check and to regulate in speed said stretching rolls 30 so that to avoid advantageously sudden increases of the level of stress over the yield limit.
  • each levelling roll 50 being preferably freewheel, or rather free to rotate, it doesn't create variations of stress on said metal strip 14.
  • said at least to couple of levelling rolls 50 maintain the level of stress on the same to a value next to that of yield however for a very longer time.
  • said plurality of stretching rolls 30 and said at least a couple of levelling rolls 50 are positioned substantially crossed.
  • said metal strip 14 is wrapped on said plurality of stretching rolls 30 and on said at least a couple of levelling rolls 50 in such way to have a very elevated wrapping angle, in particular greater of 240°.
  • Furthemore in practice the materials used, as well as their dimensions and the components, can vary according to the technical needs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)
  • Press Drives And Press Lines (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Coating With Molten Metal (AREA)
EP07020017.5A 2006-10-30 2007-10-12 Système de nivellement de tension d'une bande métallique Active EP1918035B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT002077A ITMI20062077A1 (it) 2006-10-30 2006-10-30 Sistema di stiramento e livellamento di una striscia metallica

Publications (2)

Publication Number Publication Date
EP1918035A1 true EP1918035A1 (fr) 2008-05-07
EP1918035B1 EP1918035B1 (fr) 2019-12-25

Family

ID=38983512

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07020017.5A Active EP1918035B1 (fr) 2006-10-30 2007-10-12 Système de nivellement de tension d'une bande métallique

Country Status (4)

Country Link
EP (1) EP1918035B1 (fr)
CN (1) CN101172293A (fr)
IT (1) ITMI20062077A1 (fr)
TW (1) TW200819220A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20120271A1 (it) * 2012-02-23 2013-08-24 Selema Srl Rullo di rilevamento della differenza di tensione in una pluralita' di porzioni trasversali di un nastro metallico.

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018111627A1 (de) * 2018-01-23 2019-07-25 Klaus Lenz Streck-Biege-Richtanlage und Verfahren zu deren Betätigung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5791810A (en) 1980-11-26 1982-06-08 Ishikawajima Harima Heavy Ind Co Ltd Mill roll and rolling mill equipped with said roll
JPS6240912A (ja) 1985-08-16 1987-02-21 Sumitomo Metal Ind Ltd 可変クラウン・ロ−ル
JPH0523714A (ja) 1991-07-23 1993-02-02 Mitsubishi Heavy Ind Ltd 圧延機のロール

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5791810A (en) 1980-11-26 1982-06-08 Ishikawajima Harima Heavy Ind Co Ltd Mill roll and rolling mill equipped with said roll
JPS6240912A (ja) 1985-08-16 1987-02-21 Sumitomo Metal Ind Ltd 可変クラウン・ロ−ル
JPH0523714A (ja) 1991-07-23 1993-02-02 Mitsubishi Heavy Ind Ltd 圧延機のロール

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20120271A1 (it) * 2012-02-23 2013-08-24 Selema Srl Rullo di rilevamento della differenza di tensione in una pluralita' di porzioni trasversali di un nastro metallico.
EP2631623A1 (fr) * 2012-02-23 2013-08-28 Selema Srl Rouleau de détection permettant de détecter la différence de tension dans plusieurs parties transversales d'un ruban métallique

Also Published As

Publication number Publication date
ITMI20062077A1 (it) 2008-04-30
CN101172293A (zh) 2008-05-07
TW200819220A (en) 2008-05-01
EP1918035B1 (fr) 2019-12-25

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