EP0567203A2 - Procédé pour influencer la friction entre cylindre et matières à laminer, en particulier lors du laminage de tubes - Google Patents

Procédé pour influencer la friction entre cylindre et matières à laminer, en particulier lors du laminage de tubes Download PDF

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Publication number
EP0567203A2
EP0567203A2 EP93250069A EP93250069A EP0567203A2 EP 0567203 A2 EP0567203 A2 EP 0567203A2 EP 93250069 A EP93250069 A EP 93250069A EP 93250069 A EP93250069 A EP 93250069A EP 0567203 A2 EP0567203 A2 EP 0567203A2
Authority
EP
European Patent Office
Prior art keywords
rolling
friction
roll
texturing
influencing
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.)
Withdrawn
Application number
EP93250069A
Other languages
German (de)
English (en)
Other versions
EP0567203A3 (fr
Inventor
Peter Thieven
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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 Mannesmann AG filed Critical Mannesmann AG
Publication of EP0567203A2 publication Critical patent/EP0567203A2/fr
Publication of EP0567203A3 publication Critical patent/EP0567203A3/xx
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
    • C23C26/02—Coating not provided for in groups C23C2/00 - C23C24/00 applying molten material to the substrate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
    • B21B17/14—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling without mandrel, e.g. stretch-reducing mills
    • 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
    • B21B27/005—Rolls with a roughened or textured surface; Methods for making same
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/38—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for roll bodies

Definitions

  • the invention relates to a method for influencing the friction between the roll and the rolling stock, in particular when rolling pipes in stretch-reducing rolling mills.
  • the present invention is based on the proposal to propose a method for influencing the friction between the roll and the rolling stock, with which particularly favorable material flow conditions in the roll gap with regard to elongation and spreading of the rolling stock can be adjusted.
  • a method is proposed according to the invention, which is characterized by the generation of an anisotropic coefficient of friction which is higher in the rolling direction than transverse to the rolling direction.
  • the invention provides for the microstructure of the roll surface to be prepared in such a way that the friction value is high in the rolling direction and as low as possible in the transverse direction.
  • the rolling stock experiences a desired spreading, which helps to avoid rolling errors, for example the formation of inner polygons.
  • the texturing of the roll surface be carried out by laser or electron beam treatment. Hoofs of the surface of the rollers are made with tiny oval depressions or channels with a fixed orientation, so that the coefficient of friction becomes direction-dependent.
  • the texturing of the roll surface takes place by local melting of the call and directional solidification of the crystallites.
  • the direction of the crystallites determines the size of the coefficient of friction, whereby there is no need to roughen the work roll surface.
  • the texturing of the roll surface is carried out by vapor deposition or galvanic coating with controlled alignment of the surface layer.
  • All of the proposed measures for influencing the coefficient of friction are suitable for reducing the number of control and regulating devices for controlling the spread and / or for increasing the generation program of a system, e.g. B. because you can then roll dimensions that could not be generated due to the resulting polygon formation.
  • the invention can be used universally, for example also for rolling flat products.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
EP93250069A 1992-04-22 1993-03-02 Procédé pour influencer la friction entre cylindre et matières à laminer, en particulier lors du laminage de tubes Withdrawn EP0567203A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4213667 1992-04-22
DE4213667 1992-04-22

Publications (2)

Publication Number Publication Date
EP0567203A2 true EP0567203A2 (fr) 1993-10-27
EP0567203A3 EP0567203A3 (fr) 1994-03-23

Family

ID=6457484

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93250069A Withdrawn EP0567203A2 (fr) 1992-04-22 1993-03-02 Procédé pour influencer la friction entre cylindre et matières à laminer, en particulier lors du laminage de tubes

Country Status (1)

Country Link
EP (1) EP0567203A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2876312A1 (fr) 2013-11-25 2015-05-27 HILTI Aktiengesellschaft Cheville à expansion dotée de coefficients de frottement anisotropes

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2248092A1 (fr) * 1973-10-17 1975-05-16 Alusuisse
SU770583A1 (ru) * 1978-12-05 1980-10-15 Nizhnedneprovskij Truboprokatn Валок для продольной прокатки труб 1
SU778836A1 (ru) * 1978-07-10 1980-11-20 Институт черной металлургии Способ обработки комплекта рабочих валков
FR2476524A1 (fr) * 1980-02-27 1981-08-28 Sumitomo Metal Ind Procede pour travailler la surface d'un cylindre de laminage a froid
SU1215777A1 (ru) * 1984-09-29 1986-03-07 Днепропетровский Ордена Трудового Красного Знамени Металлургический Институт Им.Л.И.Брежнева Валок дл продольной прокатки труб

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2248092A1 (fr) * 1973-10-17 1975-05-16 Alusuisse
SU778836A1 (ru) * 1978-07-10 1980-11-20 Институт черной металлургии Способ обработки комплекта рабочих валков
SU770583A1 (ru) * 1978-12-05 1980-10-15 Nizhnedneprovskij Truboprokatn Валок для продольной прокатки труб 1
FR2476524A1 (fr) * 1980-02-27 1981-08-28 Sumitomo Metal Ind Procede pour travailler la surface d'un cylindre de laminage a froid
SU1215777A1 (ru) * 1984-09-29 1986-03-07 Днепропетровский Ордена Трудового Красного Знамени Металлургический Институт Им.Л.И.Брежнева Валок дл продольной прокатки труб

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
METALLURGIST Bd. 28, Nr. 3/4, März 1984, NEW YORK US Seiten 108 - 111 V. I. ANDREEV ET AL. 'Spark machining of the working surfaces of a tube-mill rolls' *
SOVIET INVENTIONS ILLUSTRATED Section Ch, Week 8643, 6. November 1986 Derwent Publications Ltd., London, GB; Class M21, AN 86-283631/43 & SU-A-1 215 777 (DNEPR METAL INST) 7. März 1986 *
SOVIET INVENTIONS ILLUSTRATED Section Ch, Week D30, 2. September 1981 Derwent Publications Ltd., London, GB; Class M21, AN 54641 D/30 & SU-A-778 836 (FERROUS METALLURGY INST) 20. November 1980 *
SOVIET INVENTIONS ILLUSTRATED Section PQ, Week D26, 5. August 1981 Derwent Publications Ltd., London, GB; Class P51, AN 47358 D/26 & SU-A-770 583 (NIZHNEDNEPROVSK PIP) 15. Oktober 1980 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2876312A1 (fr) 2013-11-25 2015-05-27 HILTI Aktiengesellschaft Cheville à expansion dotée de coefficients de frottement anisotropes
WO2015075022A1 (fr) * 2013-11-25 2015-05-28 Hilti Aktiengesellschaft Élément d'ancrage expansible à coefficient de frottement anisotrope
US9970465B2 (en) 2013-11-25 2018-05-15 Hilti Aktiengesellschaft Expansion anchor with an anisotropic coefficient of friction

Also Published As

Publication number Publication date
EP0567203A3 (fr) 1994-03-23

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