EP1400289B1 - Walzverfahren und walzwerk - Google Patents

Walzverfahren und walzwerk Download PDF

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Publication number
EP1400289B1
EP1400289B1 EP01274032A EP01274032A EP1400289B1 EP 1400289 B1 EP1400289 B1 EP 1400289B1 EP 01274032 A EP01274032 A EP 01274032A EP 01274032 A EP01274032 A EP 01274032A EP 1400289 B1 EP1400289 B1 EP 1400289B1
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EP
European Patent Office
Prior art keywords
rolling
rolls
poles
electromagnetic
plane
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.)
Expired - Lifetime
Application number
EP01274032A
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English (en)
French (fr)
Other versions
EP1400289A1 (de
EP1400289A4 (de
Inventor
Alexandr Alexandrovich Stepanov
Lev Georgievich Deljusto
Viktor Ivanovich Abramenko
Gennady Leonidovich Kochi
Alexandr Viktorovich Artjushechkin
Alexandr Mikhailovich Sorokin
Vladislav Petrovich Naumchenko
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Severstal PAO
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Severstal PAO
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 Severstal PAO filed Critical Severstal PAO
Publication of EP1400289A1 publication Critical patent/EP1400289A1/de
Publication of EP1400289A4 publication Critical patent/EP1400289A4/de
Application granted granted Critical
Publication of EP1400289B1 publication Critical patent/EP1400289B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/16—Adjusting or positioning rolls
    • B21B31/20—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis
    • 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
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • 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
    • B21B2013/028—Sixto, six-high stands
    • 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
    • B21B31/16—Adjusting or positioning rolls
    • B21B31/20—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis
    • B21B31/32—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis by liquid pressure, e.g. hydromechanical adjusting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/58—Roll-force control; Roll-gap control

Definitions

  • the present invention relates to rolling and can be used in mills for the hot/cold rolling of ferrous and non-ferrous metals and alloys.
  • a rolling process (Patent RU No 2139153 , B21B 1/22, published 10.10.1999), according to which a rolling force distributed along roll barrels is produced with the aid of electromagnetic attractive or repulsive forces to be provided in an external electromagnetic field across a magnetic flux vector.
  • the horizontal axes of the rolls are coincident with axes of symmetry of electromagnet poles, in which particular case the attractive forces of the rolls toward the poles are substantially parallel to a rolling plane. For this very reason, the rolls are attracted to the opposite poles with no rolling force created.
  • a greater part of magnetic field energy does not participate in producing the rolling force that is here produced only by forces of attraction of the rolls to one another when being magnetized. Said circumstance is a drawback of the known rolling process as not allowing one to use all of the magnetic flux to produce said rolling force as much as possible.
  • rolls are disposed in an external electromagnetic or magnetic field such that a field vector is directed along a diametral plane of a roll being in parallel relation to the rolling plane.
  • An electric current is passed through the rolls thereat.
  • Pressure on the rolls is distributed by changing a magnetic flux density along the generating line of roll barrels.
  • a rolling force is created on account of the attractive forces of rolls used and also of forces of repulsion thereof.
  • the poles of electromagnet means or magnet means are located between the diametral plane of the roll and the rolling plane.
  • the electromagnet means or magnet means are provided with the like poles thereof with respect to each other, with a faculty of rotation thereof in a horizontal plane.
  • the stand of the invention is provided with at least a pair of press rolls. The latter are disposed with freedom to move in a vertical plane and situated between the poles of electromagnet means or magnet means.
  • the magnet means are adapted to move in the horizontal plane.
  • At least one pair of permanent magnets or electromagnets have a capability of movement in the horizontal and vertical planes.
  • Magnetic circuits are made up of the permanent magnets and provided with control coils supplied with pulse currents of a different correction sense.
  • a drawback of the screwdown mechanism of a known stand is the low speed and accuracy of adjusting a clearance between rolls.
  • the travel speed of housing screws in the QUARTO stands of hot rolling finishing mill group 2000 is from 0.5 to 1 mm/s. ( P.I. Poloukhin "Rolling", Moscow, METALLURGIYA Publishers, 1982, page 386 ).
  • a low accuracy of rolling is also explained by an appreciable amount of springing of said stand screwdown mechanism elements.
  • the travel speed of the rods of hydraulic screwdowns (HS), according to these information sources, is 2.5 mm/s.
  • the accuracy of adjustment is limited by the springing of elements of a hydraulic screwdown and a degree of elastic deformation of oil accounting for about 0.5 to 1%.
  • a disadvantage of the known screwdown mechanism is the impossibility to use it in updating the existing stands equipped with housing screws with an electromechanical drive means, and hydraulic screwdowns which directly affect the rolls via chucks.
  • the task of the present invention is to simplify the design of a stand, increase the speed and accuracy of adjusting a clearance between rolls, and precisely regulating a force produced in rolling operations.
  • the task set is accomplished by a rolling process and a rolling stand according to claim 1 and claim 5 respectively.
  • a rolling force can be increased by auxiliary press rolls by electromagnetic effects produced on said auxiliary press rolls.
  • the delicate adjustment of a rolling force is carried out by changing current level and/or issuing current pulses into the electromagnetic systems of a screwdown mechanism which are provided for the movable and stationary units of the screwdown mechanism, say, hydraulic system units.
  • the stand is preferably provided with the supports of an electromagnetic system, which in turn may be equipped with travel mechanisms such as hydraulic cylinders.
  • a stand can be provided with a pair of auxiliary press rolls and auxiliary press roll electromagnetic systems for cooperation with the auxiliary press rolls.
  • the electromagnetic systems of auxiliary press rolls of a stand are preferably installed with a faculty of vertical movements with respect to a housing.
  • a stand For the delicate regulation of a rolling force, a stand is provided with a screwdown mechanism comprising a hydraulic screwdown having a movable and stationary unit, both accommodating electromagnetic systems intended for interaction thereof.
  • the screwdown mechanism may be composed of an electromechanical and/or hydraulic screwdown means in combination with the electromagnetic one.
  • the screwdown mechanism of a stand comprises a hydraulic screwdown being comprised of a movable and stationary unit provided with electromagnetic systems for interaction thereof.
  • the electromagnetic systems of a stand screwdown mechanism comprise at least two coils each, of which one is intended for connection to a d.c. source and the other in the form of an inductor is designated for connection to a discharge device, say, a capacitor bank associated with a control system, and a stationary unit is intended for cooperation with a housing screw of an electromechanical screwdown mechanism or a stand housing, while a movable unit - for articulated cooperation with a chuck of a press roll.
  • an alleged invention makes it possible to appreciably expand the technological possibilities of stands for rolling strips by way of eliminating concentrated loads on roll necks, broadening a range of rolled strips, diminishing rejection as to size and improving rolling precision owing to an increase in the speed of response of a screwdown mechanism.
  • a greater part of rolling force is created by electromagnetic volumetric forces (80-90%), the remaining part (10-20%) - by combined screwdown mechanisms (screw-HS) + (electromagnet) or (HS+ electromagnet); possible is a variant (screw+ electromagnet) ( ⁇ 100-200 tc) and, therefore, loading on roll necks will be reduced considerably. This will make it possible to diminish the diameters of the necks of press and working rolls, extend the service life of the rolls and bearings and appreciably decrease the longitudinal and transversal variations in thickness of the strips.
  • FIG. 1 One of the embodiments of a rolling process is a stand schematically illustrated in Fig. 1 .
  • the stand comprises a housing I made of nonmagnetic material, working rolls 2, press rolls 3, 4, III-like cores 5 with coils 6, solenoids 7, movable supports 8, supports 9 of hydraulic cylinders 10, housing screws II, chucks 12 of rolls the 4, and an electromechanical mechanism 13.
  • the III-like electromagnet means are situated symmetrically of a vertical plane being perpendicular to a rolling plane 1 and being drawn through the centers of press and working rolls.
  • the cores of said III-like electromagnet means are located between the diametral planes of the working and press rolls being in parallel relation to the rolling plane thereby to create the maximum forces of rolls attraction to the poles of the III-like electromagnet means. More, the relative position of the poles with respect to the vertical plane should correspond to the N-S-N or S-N-S diagram (cannot be otherwise).
  • the distances "b" between the cores of the said III-like electromagnet means and rolls should be minimal, but not allowing their contact as the rolls wear out.
  • the clearance "b" will gradually increase followed by the induction B and a rolling force diminishing little by little.
  • the addition of currents to the coils of said III-like electromagnet means may be helpful in retaining the rolling force within specified limits on account of maintaining a certain magnetic flux density in the running clearance between the roll and the pole.
  • the cores of said III-like electromagnet means being movable in vertical and horizontal planes, the size of an air gap can be adjusted mechanically, with its mean value maintained at constant level.
  • the screwdown mechanism comprises a body 14 provided between a screw 11 and a chuck 12 of a roll 4 filled with oil 15, a hydraulic system 16.
  • a movable unit 17 in the form of a piston
  • a stationary unit 18 are arranged within the body 14, said units contain coils 19 provided , symmetrically of the body, connected to a d.c. source (not shown conventionally) and coils 20 in the form of inductors.
  • the screwdown mechanism is connected with the screw II via a traverse 21 and with said chuck 12 body on the other side by means of traverses 22.
  • the screwdown mechanism is capable of traveling together with the screw 11 and the chuck 12 in a vertical plane with the aid of a guide sleeve 23 secured on a housing I, of a commutation network 24.
  • the stand is operated according to both QUARTO and SEXTO diagrams.
  • the role of a screwdown mechanism is played by rolls 3, while rolls 4 perform the function of a mechanism of delicate adjustment of thickness of strip at the time of supplying currents of different signs into solenoids.
  • the role of the screwdown mechanism is played by the rolls 3, 4 and a delicate adjustment of a strip section is carried out through current supply into coils 19 and electric impulses of different signs-into inductors 20.
  • the stand is operated in the following manner.
  • the automatic delicate adjustment of the thickness and section of a strip is carried out by issuing short electric impulses ⁇ ⁇ 10 -4 ; 10 -6 C into coils 19 and inductors 20 being different as to intensity and sign.
  • the coarse adjustment of a clearance between rolls is effected by a housing screw from electromechanical drive means.
  • a cavity "A" of a body 14 is connected with a drain line and the currents are supplied into coils 19 from a d.c. source of a direction when the surfaces of movable and stationary units facing each other have a different polarity (N-S).
  • a movable unit will be attracted to the stationary one, and a screwdown mechanism with a chuck 12 and a roll 4 will travel in the screw 11 movement direction (up and down).
  • a strip thickness automatic regulation system delivers the pulses (discharges) of strong currents into inductors 20 of one or different directions (1 ⁇ 10 5 A, t ⁇ 10 -5 c), a factor that makes it possible to remove momentarily impermissible variations in thickness lengthwise of the strip.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)

Claims (11)

  1. Walzvorgang, umfassend das Erzeugen und Regulieren einer Walzkraft über elektromagnetische Systeme, wobei jedes zum Zusammenwirken mit den Arbeits- (2), Press- (3) und Hilfspresswalzen (4) eines Gerüsts bestimmt ist, wobei die Zusatzpresswalzen (3) mit Bewegungsfreiheit in einer vertikalen Ebene eingerichtet sind, dadurch gekennzeichnet, dass die Walzkraft durch Elektromagnetmittel (5, 6, 7, 8, 9, 10, 11, 12, 13) mit III-artigen Kernen (5) bewirkt ist, die sich symmetrisch zu einer Walzebene befinden, sodass die Pole der III-artigen Kerne (5) die Walzen (2, 3) unter diametralen Ebenen davon, die parallel zu der Walzebene sind, auf der Seite der Walzebene umfassen und die inneren Pole die Arbeitswalzen (2) und die äußeren Pole die Presswalzen (3) umfassen, wobei die Walzkraft durch Ändern einer Stromstärke in den Spulen (6) der III-artigen Kerne (5) in Kombination mit elektromagnetischen Wirkungen, die auf den Hilfspresswalzen (4) erzeugt werden, reguliert wird.
  2. Walzvorgang nach Anspruch 1, dadurch gekennzeichnet, dass eine Walzkraft durch Hilfspresswalzen (4) über elektromagnetische Wirkungen erhöht wird, die auf den Hilfspresswalzen (4) erzeugt werden.
  3. Walzvorgang nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass zum Einstellen der Walzkraft auf empfindliche Art und Weise von einem Anstellmechanismus (11, 12, 14, 15, 16, 17, 18, 19, 20) mit kombinierter Funktion Gebrauch gemacht wird, der zu elektromechanischen, hydraulischen und elektromagnetischen Wirkungen beiträgt, die auf den Walzen (2, 3, 4) erzeugt werden.
  4. Walzvorgang nach Anspruch 3, dadurch gekennzeichnet, dass die empfindliche Einstellung der Walzkraft durch Ändern eines Strompegels und/oder Zuleiten der Stromimpulse in die elektromagnetischen Systeme (5, 6, 7, 8, 9, 10, 11, 12, 13) des Anstellmechanismus (11, 12, 14, 15, 16, 17, 18, 19, 20), mit denen die beweglichen und ortsfesten Einheiten des Anstellmechanismus (11, 12, 14, 15, 16, 17, 18, 19, 20) versehen sind, wie etwa die Einheiten eines hydraulischen Systems, ausgeführt wird.
  5. Walzgerüst, umfassend ein Gehäuse (1) aus nichtmagnetischem Material, Arbeits- (2) und Presswalzen (3), ein Walzenantriebsmittel und ein elektromagnetisches System (5, 6, 7, 8, 9, 10, 11, 12, 13), wobei die Walzen (2, 3) mit Bewegungsfähigkeit in einer vertikalen Ebene eingerichtet sind, dadurch gekennzeichnet, dass das elektromagnetische System (5, 6, 7, 8, 9, 10, 11, 12, 13) als zumindest ein Paar von III-artigen Kernen (5) mit Spulen (6) gestaltet ist, die die inneren Pole der Kerne (5) umfassen, die Arbeits- (2) und Presswalzen (3) zwischen den Polen der III-artigen Kerne (5) angeordnet sind, die III-artigen Kerne (5) symmetrisch zu einer Walzebene angebracht sind, die Pole der III-artigen Kerne (5) die Walzen (2, 3) unter diametralen Ebenen davon, die parallel zu der Walzebene sind, auf der Seite der Walzebene umfassen, wobei die inneren Pole die Arbeitswalzen (2) und die äußeren Pole die Presswalzen (3) umfassen;
    das Gerüst mit einem Paar Hilfspresswalzen (4) versehen ist und die elektromagnetischen Systeme (5, 6, 7, 8, 9, 10, 11, 12, 13) der Hilfspresswalzen (4) zum Zusammenwirken mit den Hilfspresswalzen (4) bestimmt sind;
    wobei die elektromagnetischen Systeme (5, 6, 7, 8, 9, 10, 11, 12, 13) der Hilfspresswalzen (4) mit vertikaler Bewegungsfähigkeit bezüglich eines Gehäuses (1) angebracht sind.
  6. Walzgerüst nach Anspruch 5, dadurch gekennzeichnet, dass es mit den Halterungen (1, 2, 3) des elektromagnetischen Systems (5, 6, 7, 8, 9, 10, 11, 12, 13) versehen ist.
  7. Walzgerüst nach Anspruch 6, dadurch gekennzeichnet, dass die Halterungen (1, 2, 3) mit Transportmechanismen, wie etwa Hydraulikzylindern, versehen sind.
  8. Walzgerüst nach einem der Ansprüche 5 bis 7, dadurch gekennzeichnet, dass es mit einem Paar Hilfspresswalzen (4) und den elektromagnetischen Systemen (5, 6, 7, 8, 9, 10, 11, 12, 13) der Hilfspresswalzen (4) versehen ist, die zum Zusammenwirken mit Hilfspresswalzen (4) bestimmt sind.
  9. Walzgerüst nach Anspruch 8, dadurch gekennzeichnet, dass das elektromagnetische System (5, 6, 7, 8, 9, 10, 11, 12, 13) der Hilfspresswalzen (4) mit vertikaler Bewegungsfreiheit bezüglich eines Gehäuses (1) angebracht ist.
  10. Walzgerüst nach einem der Ansprüche 8 oder 9, dadurch gekennzeichnet, dass es mit einem Anstellmechanismus (11, 12, 14, 15, 16, 17, 18, 19, 20) versehen ist, welcher eine hydraulische Anstellung (16, 17, 18) mit beweglichen (17) und ortsfesten Einheiten (18) umfasst, die elektromagnetische Systeme (5, 6, 7, 8, 9, 10, 11, 12, 13) aufnehmen, welche zum Zusammenwirken miteinander bestimmt sind.
  11. Walzgerüst nach einem der Ansprüche 8 oder 9, dadurch gekennzeichnet, dass der Anstellmechanismus (16, 17, 18) einen elektromagnetischen und/oder hydraulischen Anstellmechanismus in Kombination mit dem elektromagnetischen Anstellmechanismus umfasst.
EP01274032A 2001-03-28 2001-11-14 Walzverfahren und walzwerk Expired - Lifetime EP1400289B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
RU2001108349 2001-03-28
RU2001108349A RU2207925C2 (ru) 2001-03-28 2001-03-28 Способ прокатки, прокатная клеть и нажимное устройство прокатной клети
PCT/RU2001/000481 WO2002076644A1 (fr) 2001-03-28 2001-11-14 Procede de laminage, laminoir et dispositif presseur pour laminoir

Publications (3)

Publication Number Publication Date
EP1400289A1 EP1400289A1 (de) 2004-03-24
EP1400289A4 EP1400289A4 (de) 2007-07-18
EP1400289B1 true EP1400289B1 (de) 2010-12-29

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EP01274032A Expired - Lifetime EP1400289B1 (de) 2001-03-28 2001-11-14 Walzverfahren und walzwerk

Country Status (5)

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EP (1) EP1400289B1 (de)
JP (1) JP4263486B2 (de)
DE (1) DE60143772D1 (de)
RU (1) RU2207925C2 (de)
WO (1) WO2002076644A1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2187394C1 (ru) * 2001-04-23 2002-08-20 Открытое акционерное общество "Северсталь" Нажимное устройство прокатной клети
RU179561U1 (ru) * 2017-06-01 2018-05-17 Лев Георгиевич Делюсто Универсальная магнитная клеть для прокатки полос
KR102483613B1 (ko) 2017-10-20 2023-01-02 삼성전기주식회사 인쇄회로기판
CN110328235A (zh) * 2019-07-15 2019-10-15 上海大学 一种在磁场下高硅钢冷轧的方法
CN116921429B (zh) * 2023-09-13 2023-12-08 福建紫金英菲迅应用材料有限公司 一种银铜合金制造系统及其制造方法

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FI52394C (fi) * 1975-12-31 1977-08-10 Valmet Oy Taipumakompensoitu, päistään kuormitettu tela, etenkin paperikoneen pu ristintela.
JPS57206506A (en) * 1981-06-12 1982-12-17 Toshiba Corp Rolling mill
RU2125917C1 (ru) * 1997-10-29 1999-02-10 Открытое акционерное общество "Северсталь" Гидромеханическое нажимное устройство
RU2141880C1 (ru) * 1998-04-03 1999-11-27 Открытое акционерное общество "Северсталь" Прокатная клеть
RU2138346C1 (ru) * 1998-04-03 1999-09-27 Открытое акционерное общество "Северсталь" Прокатная клеть
RU2146971C1 (ru) * 1998-05-13 2000-03-27 Открытое акционерное общество "Северсталь" Способ продольной прокатки и клеть для его осуществления
RU2149718C1 (ru) * 1999-01-27 2000-05-27 Открытое акционерное общество "Северсталь" Прокатная клеть

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Publication number Publication date
DE60143772D1 (de) 2011-02-10
WO2002076644A1 (fr) 2002-10-03
EP1400289A1 (de) 2004-03-24
JP4263486B2 (ja) 2009-05-13
RU2207925C2 (ru) 2003-07-10
EP1400289A4 (de) 2007-07-18
JP2004527378A (ja) 2004-09-09

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