US20040244455A1 - Method for reconditioning rollers - Google Patents

Method for reconditioning rollers Download PDF

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Publication number
US20040244455A1
US20040244455A1 US10/485,197 US48519704A US2004244455A1 US 20040244455 A1 US20040244455 A1 US 20040244455A1 US 48519704 A US48519704 A US 48519704A US 2004244455 A1 US2004244455 A1 US 2004244455A1
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US
United States
Prior art keywords
roll
rolls
roll surface
rolling
liquid jet
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.)
Abandoned
Application number
US10/485,197
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English (en)
Inventor
Peter Eschner
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.)
Aluminium Norf GmbH
Original Assignee
Aluminium Norf 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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7703705&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US20040244455(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Aluminium Norf GmbH filed Critical Aluminium Norf GmbH
Assigned to ALUMINIUM NORF GMBH reassignment ALUMINIUM NORF GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ESCHNER, PETER
Publication of US20040244455A1 publication Critical patent/US20040244455A1/en
Abandoned 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
    • B21B28/00—Maintaining rolls or rolling equipment in effective condition
    • B21B28/02—Maintaining rolls in effective condition, e.g. reconditioning
    • B21B28/04—Maintaining rolls in effective condition, e.g. reconditioning while in use, e.g. polishing or grinding while the rolls are in their stands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B28/00—Maintaining rolls or rolling equipment in effective condition
    • B21B28/02—Maintaining rolls in effective condition, e.g. reconditioning

Definitions

  • the present invention relates to a method for refurbishing rolls of a hot rolling stand for aluminum materials for producing rolling mill products, in which the rolls are refurbished after or during usage by processing the roll surface.
  • rolls for the production of rolling mill products have a roll surface adapted to the particular intended use.
  • work rolls for hot or cold rolling of metal strips have a roll surface having a defined roughness in order to ensure secure gripping of the rolling stock by the rolls and the production of a defined surface of the rolling stock.
  • the work rolls used during the hot rolling of aluminum strips have a grinding structure on their surface which ensures the production of desired surface properties of the rolling stock and contributes to a secure gripping of the rolling stock by the rolls, through which slipping in the roll gap is avoided.
  • aluminum oxide particles or aluminum particles or—depending on the alloy rolled—magnesium oxide particles or magnesium particles are deposited in the recesses of the grinding structure. These particles are compressed in the recesses by the high rolling pressure force in such a way that they fill up the recesses of the grinding structure compactly and very resistively. In turn, this leads to the grinding structure on the roll surface no longer being effective after a certain usage period of the roll during rolling.
  • the deposits formed on the roll surface are also referred to as roll coating.
  • rolls are products which are costly to produce, according to the prior art, they are not completely replaced after the formation of roll scale or the like, but uninstalled and refurbished by processing of the roll surface. After the refurbishment, the rolls again have the desired properties on their roll surface and may be used again.
  • Refurbishment of the rolls by processing the roll surface using mechanical abrasive methods, such as grinding, is known from the prior art. For this method, the deposited contaminants impurities and the material of the roll itself are removed in a defined way from the roll surface in order to produce an unused roll surface. Sometimes, the roll surfaces are also subjected to renewed coating or hardening after the mechanical abrasive treatment.
  • cleaning brushes by means of which the surface of the rolls may be brushed in the installed state, preferably continuously, to extend the usage times of rolls in a hot rolling stand for aluminum materials is known.
  • the brushes cited are steel or plastic brushes whose use over a long period leads to a change of the roll surface—similar to polishing—through which the ability of the rolls to grip the rolling stock securely is reduced.
  • the present invention has the object of specifying a method for refurbishing rolls for the production of rolled products which ensures simple, rapid, and cost-effective refurbishment of the rolls.
  • the highly compressed particles and deposits accumulated on the roll surface may be removed nearly without residue by means of a liquid jet.
  • the processing of the roll surface by means of a liquid jet is advantageous particularly because the original roll surface is nearly unchanged in this way, so that, for example, no reduction of the roll diameter occurs during the refurbishment.
  • the actual roll surface is nearly unchanged during the processing by means of a liquid jet, the roll remains dimensionally correct even after refurbishment.
  • the demands on the processing by means of a liquid jet are therefore much lower than for mechanical abrasive methods, in which the dimensional correctness must be ensured.
  • processing of the roll surface by means of a liquid jet may be performed significantly more rapidly than processing of the roll surface with mechanical abrasive methods, such as grinding.
  • the method according to the present invention may also, however, be combined with the mechanical abrasive methods known from the related art.
  • the liquid pressure is set to approximately 50 to 250 MPa (10 6 Pa), preferably 70 to 150 MPa, during the production of the liquid jet, reliable removal of the residues and contaminations on the roll is ensured.
  • mechanically driven piston pumps pluripotent pumps
  • hydraulic pressure intensifiers are used in the overwhelming number of cases, in part with the additional use of hydraulic pressure intensifiers.
  • a first advantageous embodiment of the method according to the present invention is distinguished in that the roll surface is processed exclusively by means of a liquid jet for refurbishment. It has been shown that the processing of the roll surface by means of a liquid jet for refurbishing rolls is sufficiently thorough that further processing of the roll surface, particularly by brushes, is unnecessary. In particular, coatings of the roll surface, which have been applied to increase the strength of the roll surface, for example, are typically retained during the processing by means of a liquid jet.
  • the teaching according to the present invention is advantageously further developed if the processing is performed during rolling breaks.
  • rolling breaks occur regularly, which result because of the system, e.g. from the transport of a new ingot to the rolling stand or something similar. These rolling breaks may be used without anything further in order to refurbish the rolls according to the present invention.
  • the method according to the present invention is developed further in regard to environmental compatibility, operational safety, and the costs connected with the method. Maintaining explosion safety without problems is ensured by the use of water.
  • the water arising during refurbishment may be treated without anything further in conventional waste disposal measures and/or may remain in a water cycle, for example, the emulsion water cycle of a hot roll.
  • the use of alternative liquids for generating the liquid jet used for processing is also possible in principle.
  • the quality of the water used is to be adapted to the particular application.
  • the addition of particles in an adapted dosage is also conceivable, in order to elevate the cleaning force and/or to process the roll surface in a shape-changing way.
  • FIG. 1 schematically shows a highly enlarged section through the roll surface of a work roll
  • FIG. 2 shows a perspective view of a roll during refurbishment by means of a method according to the present invention.
  • FIG. 1 The highly enlarged section schematically illustrated in FIG. 1 shows the profile of a work roll of a hot rolling stand for aluminum alloys.
  • the actual roll material 1 is shown hatched. In the present case, this is a steel roll. For other applications, rolls made of cast iron are also used, for example. It may be seen clearly that the roll surface is contoured in the scale shown and has multiple elevations 2 and recesses 3 . These elevations 2 and recesses 3 provided in the roll material 1 , referred to in general as roughness, ensure, among other things, reliable gripping of the rolling stock by the roll and a desired surface shape of the rolling stock during the use of the work roll illustrated, as already noted. This is ensured with force transmission by friction arising between the elevations 2 and the recesses 3 and the aluminum strip rolled.
  • chromium plating 4 has been produced on the roll surface. This chromium plating 4 over the entire surface is used to increase the hardness of the roll surface and therefore the durability of the elevations 2 .
  • the roll surface shown in FIG. 1 belongs to a roll which has already been used to a significant extent.
  • aluminum oxide particles and aluminum particles which have been compressed by the high rolling pressure into deposits 5 , have accumulated in the recesses 3 during the hot rolling of aluminum strips.
  • the deposits 5 shown in FIG. 1 already cover a part of the recesses 3 , through which the engagement between the roll surface and the rolling stock is reduced. In this way, effects such as slipping of the rolls, the detachment of deposits 5 , which remain on the rolling stock surface, and increasing accumulation of deposits 5 in points, which leave imprints on the rolling stock surface, increasingly occur.
  • the roll surface shown in FIG. 1 must be refurbished to produce continued flawless rolled stock.
  • the refurbishment is performed by processing the roll surface by means of a liquid jet, as shown in FIG. 2.
  • a liquid jet for a work roll of a hot rolling stand for aluminum, water is preferably used as the liquid, since a water/oil emulsion is used during the hot rolling itself, and water therefore does not represent a foreign material in the process.
  • a roll 6 illustrated in FIG. 2 shows, after a certain period of usage, a roll scale 7 made of the deposits 5 shown in FIG. 1, which must be removed during refurbishment.
  • the refurbishment is performed by processing the roll surface 8 by means of a liquid jet 9 , which exits a jet lance 10 .
  • the roll scale has been removed.
  • the refurbishment according to the present invention shown in FIG. 2 may be performed in both the built-in and in the uninstalled state of the roll 6 .
  • the jet lance 10 may be controlled by hand or automatically. Positioning a device inside the rolling stand which guides the jet lance 10 automatically in a defined way over the roll surface 8 during refurbishing of the roll 6 in order to remove the roll scale—as soon as this is necessary—stands to reason. This is also possible during rolling procedure.
  • a water jet having a pressure of approximately 200 MPa without the addition of particles is used during the refurbishment as described.

Landscapes

  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Metal Rolling (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Bakery Products And Manufacturing Methods Therefor (AREA)
  • Seasonings (AREA)
  • Detergent Compositions (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Paper (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
US10/485,197 2001-10-19 2002-06-29 Method for reconditioning rollers Abandoned US20040244455A1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10152718 2001-10-19
DE10152718.7 2001-10-19
EP01125177.4 2001-10-23
EP01125177A EP1304174A1 (de) 2001-10-19 2001-10-23 Verfahren zur Aufbereitung von Walzen
PCT/EP2002/007214 WO2003035292A1 (de) 2001-10-19 2002-06-29 Verfahren zur aufarbeitung von walzen

Publications (1)

Publication Number Publication Date
US20040244455A1 true US20040244455A1 (en) 2004-12-09

Family

ID=7703705

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/485,197 Abandoned US20040244455A1 (en) 2001-10-19 2002-06-29 Method for reconditioning rollers

Country Status (14)

Country Link
US (1) US20040244455A1 (ko)
EP (2) EP1304174A1 (ko)
JP (1) JP3854274B2 (ko)
KR (1) KR100594644B1 (ko)
CN (1) CN1282507C (ko)
AT (1) ATE289532T1 (ko)
AU (1) AU2002325855B9 (ko)
BR (1) BR0211724A (ko)
CA (1) CA2457168A1 (ko)
DE (1) DE50202340D1 (ko)
ES (1) ES2238061T3 (ko)
PL (1) PL367793A1 (ko)
RU (1) RU2280520C2 (ko)
WO (1) WO2003035292A1 (ko)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100058570A1 (en) * 2007-03-13 2010-03-11 Polyslus AG Method for reconditioning a used grinding roller
US20190201952A1 (en) * 2017-07-20 2019-07-04 Lg Chem, Ltd. System and Method for Manufacturing Electrode for Secondary Battery

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004006629B3 (de) * 2004-02-10 2005-11-17 Sundwig Gmbh Vorrichtung zum Reinigen der Oberfläche von zylindrischen Körpern, wie Walzen oder Rollen
FR2915118B1 (fr) * 2007-04-18 2009-06-05 Siemens Vai Metals Tech Sas Procede de nettoyage de cylindre de laminoir et dispositif correspondant
DE202013012025U1 (de) 2013-05-27 2015-02-23 Hydro Aluminium Rolled Products Gmbh Walzvorrichtung und Verwendung eines Konditionierwerkzeugs in einem Verfahren zur Konditionierung einer Walzenoberfläche
CN104942011B (zh) * 2015-06-17 2016-09-28 铜陵市大明玛钢有限责任公司 高铬钢冷轧辊的表面养护方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4467629A (en) * 1981-10-02 1984-08-28 Sms Schloemann-Siemag Ag Method of flattening steel strip in rolling mill
US5025547A (en) * 1990-05-07 1991-06-25 Aluminum Company Of America Method of providing textures on material by rolling
US5460023A (en) * 1991-09-13 1995-10-24 International Rolling Mill Consultants Inc. Roll surface restoration system and method
US5502881A (en) * 1993-08-23 1996-04-02 Gaydoul; Juergen Apparatus for descaling substantially flat surfaces of hot rolled stock
US5697241A (en) * 1993-08-23 1997-12-16 Voest-Alpine Industrieanlagenbau Gmbh Rolling arrangement
US6309472B1 (en) * 1998-10-20 2001-10-30 Bwg Bergwerk-Und Walzwerk-Maschinenbau Gmbh Method of and apparatus for cleaning strip line rolls

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06106213A (ja) * 1992-09-30 1994-04-19 Kawasaki Steel Corp 冷間圧延ミル出側ロールの寿命延長方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4467629A (en) * 1981-10-02 1984-08-28 Sms Schloemann-Siemag Ag Method of flattening steel strip in rolling mill
US5025547A (en) * 1990-05-07 1991-06-25 Aluminum Company Of America Method of providing textures on material by rolling
US5460023A (en) * 1991-09-13 1995-10-24 International Rolling Mill Consultants Inc. Roll surface restoration system and method
US5502881A (en) * 1993-08-23 1996-04-02 Gaydoul; Juergen Apparatus for descaling substantially flat surfaces of hot rolled stock
US5697241A (en) * 1993-08-23 1997-12-16 Voest-Alpine Industrieanlagenbau Gmbh Rolling arrangement
US6309472B1 (en) * 1998-10-20 2001-10-30 Bwg Bergwerk-Und Walzwerk-Maschinenbau Gmbh Method of and apparatus for cleaning strip line rolls

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100058570A1 (en) * 2007-03-13 2010-03-11 Polyslus AG Method for reconditioning a used grinding roller
US8316543B2 (en) * 2007-03-13 2012-11-27 Polysius Ag Method for reconditioning a used grinding roller
US20190201952A1 (en) * 2017-07-20 2019-07-04 Lg Chem, Ltd. System and Method for Manufacturing Electrode for Secondary Battery
US11072007B2 (en) * 2017-07-20 2021-07-27 Lg Chem, Ltd. System and method for manufacturing electrode for secondary battery

Also Published As

Publication number Publication date
RU2004102899A (ru) 2005-06-10
AU2002325855B9 (en) 2006-04-06
KR100594644B1 (ko) 2006-07-07
EP1436103A1 (de) 2004-07-14
EP1436103B1 (de) 2005-02-23
CN1282507C (zh) 2006-11-01
WO2003035292A1 (de) 2003-05-01
CN1553831A (zh) 2004-12-08
JP3854274B2 (ja) 2006-12-06
BR0211724A (pt) 2004-09-21
EP1304174A1 (de) 2003-04-23
ATE289532T1 (de) 2005-03-15
KR20040044445A (ko) 2004-05-28
CA2457168A1 (en) 2003-05-01
JP2005506203A (ja) 2005-03-03
AU2002325855B2 (en) 2005-11-10
ES2238061T3 (es) 2005-08-16
PL367793A1 (en) 2005-03-07
DE50202340D1 (de) 2005-03-31
RU2280520C2 (ru) 2006-07-27

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Legal Events

Date Code Title Description
AS Assignment

Owner name: ALUMINIUM NORF GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ESCHNER, PETER;REEL/FRAME:015658/0917

Effective date: 20040319

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION