DE10243677A1 - Device for bending rollers in a multiple roller rolling mill comprises a vertical positioning unit assigned to bending blocks of one roll stand, to a plunger cylinder and to the bending blocks of the opposite-lying roll stand - Google Patents

Device for bending rollers in a multiple roller rolling mill comprises a vertical positioning unit assigned to bending blocks of one roll stand, to a plunger cylinder and to the bending blocks of the opposite-lying roll stand Download PDF

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Publication number
DE10243677A1
DE10243677A1 DE10243677A DE10243677A DE10243677A1 DE 10243677 A1 DE10243677 A1 DE 10243677A1 DE 10243677 A DE10243677 A DE 10243677A DE 10243677 A DE10243677 A DE 10243677A DE 10243677 A1 DE10243677 A1 DE 10243677A1
Authority
DE
Germany
Prior art keywords
bending
roll stand
blocks
vertical positioning
bending blocks
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Withdrawn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
DE10243677A
Other languages
German (de)
Inventor
Wolfgang Denker
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.)
SMS Siemag AG
Original Assignee
SMS Demag 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 SMS Demag AG filed Critical SMS Demag AG
Priority to DE10243677A priority Critical patent/DE10243677A1/en
Priority to JP2004542275A priority patent/JP4732752B2/en
Priority to CNB038222760A priority patent/CN100342988C/en
Priority to RU2005111758/02A priority patent/RU2313410C2/en
Priority to KR1020057003920A priority patent/KR100990866B1/en
Priority to US10/528,324 priority patent/US20060021412A1/en
Priority to PCT/EP2003/008223 priority patent/WO2004033120A1/en
Priority to UAA200503731A priority patent/UA82333C2/en
Priority to BRPI0313605-1A priority patent/BR0313605B1/en
Priority to DE50303390T priority patent/DE50303390D1/en
Priority to EP03807758A priority patent/EP1556178B1/en
Priority to CA2498303A priority patent/CA2498303C/en
Priority to AT03807758T priority patent/ATE326295T1/en
Priority to ES03807758T priority patent/ES2260692T3/en
Priority to AU2003250179A priority patent/AU2003250179A1/en
Publication of DE10243677A1 publication Critical patent/DE10243677A1/en
Priority to ZA200501197A priority patent/ZA200501197B/en
Priority to US12/587,050 priority patent/US20100018275A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B29/00—Counter-pressure devices acting on rolls to inhibit deflection of same under load, e.g. backing rolls ; Roll bending devices, e.g. hydraulic actuators acting on roll shaft ends
    • 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
    • B21B31/08—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts
    • B21B31/10—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts by horizontally displacing, i.e. horizontal roll changing
    • B21B31/106—Vertical displacement of rolls or roll chocks during horizontal roll changing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B33/00—Safety devices not otherwise provided for; Breaker blocks; Devices for freeing jammed rolls for handling cobbles; Overload safety devices
    • 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
    • B21B2013/025—Quarto, four-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
    • 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
    • B21B31/22—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis mechanically, e.g. by thrust blocks, inserts for removal
    • B21B31/24—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis mechanically, e.g. by thrust blocks, inserts for removal by screws

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Control Of Metal Rolling (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Actuator (AREA)
  • Unwinding Webs (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Rolls And Other Rotary Bodies (AREA)

Abstract

Device for bending rollers in a multiple roller rolling mill comprises a vertical positioning unit (10) assigned to bending blocks (5, 5a) of one roll stand (6), to a plunger cylinder (7) and to the bending blocks (5', 5a') of the opposite-lying roll stand (6').

Description

Die Erfindung betrifft eine Vorrichtung zum Biegen der Walzen in einem Mehrwalzen-Walzgerüst mit ein- und auslaufseitig zwischen den Walzeneinbaustücken und den Ständerfenstern befestigten von Stellmitteln beaufschlagbaren Biegeblöcken.The invention relates to a device for bending the rolls in a multi-roll stand with and on the outlet side between the roller chocks and the stand windows attached bending blocks to which actuating means can be applied.

Gattungsgemäße Vorrichtungen werden zur Planheitsregelung eines Walzproduktes als Stellglied zur Arbeitswalzenbiegung eingesetzt. Das Stellglied hat hierbei direkten Einfluß auf die Walzspaltgeometrie im Bandkantenbereich, wobei die Arbeitswalzen positiv um die Kanten der darüber liegenden Walzen gebogen und negativ um die Kanten des Walzgutes gebogen werden.Generic devices become flatness control of a rolled product used as an actuator for work roll bending. The actuator has a direct influence on the roll gap geometry in the belt edge area, with the work rolls positive around the edges the one above lying rollers bent and negatively bent around the edges of the rolling stock become.

Aus der deutschen Patentschrift 22 50 953 ist ein Walzgerüst mit Arbeits- und Stützwalzen und einer Walzenbiegeeinrichtung, in dem die Einbaustücke der Arbeitswalzen zwischen in den Ständerfenstern verankerten Blöcken geführt und zur Beaufschlagung für die Arbeitswalzen-Ballenkorrektur durch beidseitig beaufschlagbare, den Blöcken zugeordnete Kolben-Zylinder-Einheiten verbunden sind bekannt, wobei an jedem Block ein unteres und ein oberes Führungsstück vertikal verschiebbar geführt ist, wogegen das eine Führungsstück den Zylinder aufnimmt und das andere Führungsstück mit dem Kolben verbunden ist, und die Führungs stücke mit den Einbaustücken durch Horizontalführungen in vertikaler Richtung formschlüssig verbunden sind, die für den Walzenwechsel zwischen den Ständern parallel zu den Walzen fortgesetzt sind. Auf diese Weise soll erreicht werden, dass zur Walzenbiegung auf jeder Seite zwei Kolben-Zylinder-Einheiten erforderlich sind.From German patent specification 22 50 953 is a roll stand with work and backup rolls and a roller bending device in which the chocks of the Work rolls between in the stand windows anchored blocks guided and to apply for the work roll bale correction by double-acting, the blocks associated piston-cylinder units are known, wherein a lower and an upper guide piece are guided vertically displaceably on each block, whereas a guide piece holds the cylinder and the other guide piece with the piston is connected, and the guide pieces with the chocks through horizontal guides form-fitting in the vertical direction who are connected for the roll change between the stands parallel to the rolls are continued. In this way it should be achieved that Roll bending requires two piston-cylinder units on each side are.

Diese Vorrichtung hat sich in der Praxis bewährt. Nachteilig ist jedoch, dass die Zylinder antriebs- und bedienungsseitig, sowie einlauf- und auslaufseitig angeordnet sein müssen. Durch diese bewegliche Lagerung jeder Seite entstehen zwangsläufig hohe Reibungskräfte, die sich zudem negativ auf die Planheitsregelung auswirken.This device has been in the Proven in practice. However, it is disadvantageous that the cylinders on the drive and operator side, and must be arranged on the inlet and outlet side. By this movable storage of each side is inevitably high Frictional forces, which also have a negative impact on the flatness control.

Der Erfindung liegt die Aufgabe zugrunde, die Reibungskräfte in einem gattungsgemäßen System zu reduzieren.The invention is based, which frictional forces in a generic system to reduce.

Zur Lösung dieser Aufgabe wird vorgeschlagen, dass den Biegeblöcken des einen Walzständers ein Kolbenzylinder und den Biegeblöcken des gegenüberliegenden Walzenständers eine Vertikalpositionier-Einrichtung zugeordnet ist.To solve this task, it is proposed that the bending blocks one of the mill stands Piston cylinder and the bending blocks of the opposite roll housing a vertical positioning device is assigned.

Durch das positionieren und arretieren der Biegeblöcke mittels der Vertikalpositionier-Einrichtung, vorzugsweise eines Spindelhubgetriebes läßt sich ein Drehpunkt erzeugen, um den das Einbaustück geschwenkt werden kann. Zur Einleitung der antriebs- und bedienungsseitigen Biegekraft in die Biegeblöcke ist somit nur jeweils ein Zylinder notwendig.By positioning and locking of the bending blocks by means of the vertical positioning device, preferably one Screw jack can be create a fulcrum around which the chock can be pivoted. To initiate the drive and operator-side bending force in the bending blocks only one cylinder is required.

Dadurch, dass im Walzgerüst nur noch zwei Zylinder für die Einleitung der Biegekraft in die Biegeblöcke im Einsatz sind, läßt sich die Reibungskraft erheblich reduzieren.Because only in the mill stand two cylinders for the introduction of the bending force into the bending blocks can be used significantly reduce the frictional force.

Durch das Spindelhubgetriebe läßt sich auch der Abschliffbereich der Walzen kompensieren.Through the screw jack gearbox also compensate for the grinding area of the rollers.

Die erfindungsgemäße Vorrichtung läßt sich auch für die Zwischenwalzenbiegung in einem Sechswalzengerüst einsetzen. Auch ein Einsatz in Reversierwalzgerüsten ist denkbar.The device according to the invention can also be for the Insert intermediate roll bend in a six-roll stand. Also an assignment in reversing roll stands is conceivable.

Weitere vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen offenbart.Further advantageous configurations the invention are disclosed in the subclaims.

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt. Es zeigen:In the drawing, an embodiment of the Invention shown. Show it:

1 ein Seitenansichtsauschnitt eines Quarto-Walzgerüstes von der Antriebsseite her gesehen, 1 a side view section of a four-high mill stand seen from the drive side,

2 eine Aufsicht auf die Arbeitswalzenebene des Walzgerüstes aus 1. 2 a view of the work roll level of the roll stand 1 ,

In einem Walzgerüst 1 werden die Arbeitswalzen 3, 3a durch die Stützwalzen 2, 2a abgestützt. Die Einbaustücke 4, 4a der Arbeitswalzen sind über die Biegeblöcke 5, 5a, 5', 5a' mit dem Walzenständer 6, 6' verbunden. Zwischen den Biegeblöcken 5' und 5a' ist ein Spindelhubgetriebe 10 angeordnet, welches über einen Antrieb 12 positionierbar und arretierbar ist.In a roll stand 1 become the work rolls 3 . 3a through the backup rolls 2 . 2a supported. The chocks 4 . 4a the work rolls are over the bending blocks 5 . 5a . 5 ' . 5a ' with the roller stand 6 . 6 ' connected. Between the bending blocks 5 ' and 5a ' is a worm gear screw jack 10 arranged, which via a drive 12 can be positioned and locked.

Die Biegeblöcken 5 und 5a sind über einen Kolbenzylinder 7 verbunden, dessen Kolben 9 im Biegeblock 5a gelagert ist, während seine Verbindungsstange 8 im Biegeblock 5 montiert ist. Die Biegeblöcke 5, 5a, 5' und 5a' lassen sich mit den Einbaustücken 4, 4a der Arbeitswalzen 3, 3a einerseits und dem Walzenständer 6, 6' andererseits in bekannter Weise verbinden.The bending blocks 5 and 5a are about a piston cylinder 7 connected whose piston 9 in the bending block 5a is stored while its connecting rod 8th in the bending block 5 is mounted. The bending blocks 5 . 5a . 5 ' and 5a ' can be with the chocks 4 . 4a of the work rolls 3 . 3a on the one hand and the roller stand 6 . 6 ' on the other hand connect in a known manner.

Die Walzrichtung des durchlaufenden Walzgutes ist durch den Doppelpfeil 11 dargestellt. Zur Planheitsregelung werden die Biegeblöcke 5', 5a' mit dem Spindelhubgetriebe positioniert und arretiert, während der Kolbenzylinder 7, welcher die Biegeblöcke 5 und 5a miteinander verbindet, die notwendige Biegekraft einleitet.The direction of rolling of the rolling stock is indicated by the double arrow 11 shown. The bending blocks are used for flatness control 5 ' . 5a ' positioned and locked with the screw jack while the piston cylinder 7 which the bending blocks 5 and 5a connects with each other, initiates the necessary bending force.

Die Erfindung ist nicht auf den Einsatz von Spindelhubgetrieben beschränkt, sondern es kann auf jede Mechanik zur vertikalen Positionierung zurückgegriffen werden, bspw. auf Keile mit Zwangsführung, Zylinder mit Klemmkopf und Positionsgeber oder auf eine Exzenterwelle.The invention is not on use limited by screw jacks, but it can be used on any mechanism for vertical positioning resorted are, for example on wedges with positive guidance, cylinder with clamping head and position encoder or on an eccentric shaft.

Claims (4)

Vorrichtung zum Biegen der Walzen in einem Mehrwalzen-Walzgerüst mit ein- und auslaufseitig zwischen den Walzeneinbaustücken und den Ständerfenstern befestigten, von Stellmitteln beaufschlagbaren Biegeblöcken, dadurch gekennzeichnet, dass den Biegeblöcken ( 5,5a;) des einen Walzenständers (6) ein Kolbenzylinder (7), und den Biegeblöcken (5', 5a') des gegenüberliegenden Walzenständers (6') eine Vertikalpositionier-Einrichtung (10) zugeordnet ist.Device for bending the rolls in a multi-roll stand with inlet and outlet sides between the roller chocks and the stator windows, which can be acted upon by bending means, characterized in that the bending blocks ( 5 . 5a ;) of a roll stand ( 6 ) a piston cylinder ( 7 ), and the bending blocks ( 5 ' . 5a ' ) of the opposite roll stand ( 6 ' ) a vertical positioning device ( 10 ) assigned. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass über die Vertikalpositionier-Einrichtung (10) eine Walzenwechselposition vertikal einstellbar ist.Device according to claim 1, characterized in that via the vertical positioning device ( 10 ) a roll change position is vertically adjustable. Vorrichtung nach den Ansprüchen 1 oder 2, dadurch gekennzeichnet, dass die Kolbenzylinder (7) jeweils aus einem in dem einen Biegeblock (5) angeordneten Kolben (8) und einer Verbindungsstange (9) zu dem anderen Biegeblock (5a) bestehen.Device according to claims 1 or 2, characterized in that the piston cylinder ( 7 ) each from one in the one bending block ( 5 ) arranged pistons ( 8th ) and a connecting rod ( 9 ) to the other bending block ( 5a ) consist. Vorrichtung nach einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Vertikalpositionier-Einrichtung (10) als ein Spindelhubgetriebe, als Keile mit Zwangsführung als Zylinder mit Klemmkopf und Positionsgeber; als Exzenterwelle oder eine andere Mechanik zur vertikalen Positionierung ausgebildet ist.Device according to one or more of claims 1 to 3, characterized in that the vertical positioning device ( 10 ) as a worm gear screw jack, as wedges with positive guidance as a cylinder with clamping head and position transmitter; is designed as an eccentric shaft or another mechanism for vertical positioning.
DE10243677A 2002-09-20 2002-09-20 Device for bending rollers in a multiple roller rolling mill comprises a vertical positioning unit assigned to bending blocks of one roll stand, to a plunger cylinder and to the bending blocks of the opposite-lying roll stand Withdrawn DE10243677A1 (en)

Priority Applications (17)

Application Number Priority Date Filing Date Title
DE10243677A DE10243677A1 (en) 2002-09-20 2002-09-20 Device for bending rollers in a multiple roller rolling mill comprises a vertical positioning unit assigned to bending blocks of one roll stand, to a plunger cylinder and to the bending blocks of the opposite-lying roll stand
DE50303390T DE50303390D1 (en) 2002-09-20 2003-07-25 FRICTION-BENDING BENDING SYSTEM IN A MULTI-ROLLER ROLLER
EP03807758A EP1556178B1 (en) 2002-09-20 2003-07-25 Low-friction bending system in a roll stand comprising several rolls
RU2005111758/02A RU2313410C2 (en) 2002-09-20 2003-07-25 Bending system with small friction losses in multi-roll rolling stand
KR1020057003920A KR100990866B1 (en) 2002-09-20 2003-07-25 Device for bending the rolls in a multi-roll roll stand
US10/528,324 US20060021412A1 (en) 2002-09-20 2003-07-25 Low-friction bending system in a roll stand comprising serveral rolls
PCT/EP2003/008223 WO2004033120A1 (en) 2002-09-20 2003-07-25 Low-friction bending system in a roll stand comprising several rolls
UAA200503731A UA82333C2 (en) 2002-09-20 2003-07-25 Low-friction bending system in roll stand comprising several rolls
BRPI0313605-1A BR0313605B1 (en) 2002-09-20 2003-07-25 device for bending the cylinders of a multi-roll lamination cage.
JP2004542275A JP4732752B2 (en) 2002-09-20 2003-07-25 Low friction deflection system in a multiple roll stand.
CNB038222760A CN100342988C (en) 2002-09-20 2003-07-25 Low friction bend system in a multiple roller rolling mill
CA2498303A CA2498303C (en) 2002-09-20 2003-07-25 Low-friction bending system in a roll stand comprising several rolls
AT03807758T ATE326295T1 (en) 2002-09-20 2003-07-25 LOW-FRICTION BENDING SYSTEM IN A MULTI-ROLL ROLL STAND
ES03807758T ES2260692T3 (en) 2002-09-20 2003-07-25 FLEXION SYSTEM WITH LITTLE BRUSHING IN A LAMINATION BOX OF VARIOUS CYLINDERS.
AU2003250179A AU2003250179A1 (en) 2002-09-20 2003-07-25 Low-friction bending system in a roll stand comprising several rolls
ZA200501197A ZA200501197B (en) 2002-09-20 2005-02-10 Low-friction bending system in a roll stand comprising several rolls.
US12/587,050 US20100018275A1 (en) 2002-09-20 2009-09-30 Low-friction bending system in a rolling stand comprising several rolls

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE10243677A DE10243677A1 (en) 2002-09-20 2002-09-20 Device for bending rollers in a multiple roller rolling mill comprises a vertical positioning unit assigned to bending blocks of one roll stand, to a plunger cylinder and to the bending blocks of the opposite-lying roll stand

Publications (1)

Publication Number Publication Date
DE10243677A1 true DE10243677A1 (en) 2004-04-01

Family

ID=31969310

Family Applications (2)

Application Number Title Priority Date Filing Date
DE10243677A Withdrawn DE10243677A1 (en) 2002-09-20 2002-09-20 Device for bending rollers in a multiple roller rolling mill comprises a vertical positioning unit assigned to bending blocks of one roll stand, to a plunger cylinder and to the bending blocks of the opposite-lying roll stand
DE50303390T Expired - Lifetime DE50303390D1 (en) 2002-09-20 2003-07-25 FRICTION-BENDING BENDING SYSTEM IN A MULTI-ROLLER ROLLER

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE50303390T Expired - Lifetime DE50303390D1 (en) 2002-09-20 2003-07-25 FRICTION-BENDING BENDING SYSTEM IN A MULTI-ROLLER ROLLER

Country Status (15)

Country Link
US (2) US20060021412A1 (en)
EP (1) EP1556178B1 (en)
JP (1) JP4732752B2 (en)
KR (1) KR100990866B1 (en)
CN (1) CN100342988C (en)
AT (1) ATE326295T1 (en)
AU (1) AU2003250179A1 (en)
BR (1) BR0313605B1 (en)
CA (1) CA2498303C (en)
DE (2) DE10243677A1 (en)
ES (1) ES2260692T3 (en)
RU (1) RU2313410C2 (en)
UA (1) UA82333C2 (en)
WO (1) WO2004033120A1 (en)
ZA (1) ZA200501197B (en)

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CN1320968C (en) * 2005-04-29 2007-06-13 中国第二重型机械集团公司 Mill bend roller connecting device
CN112178003A (en) * 2020-09-16 2021-01-05 马鞍山钢铁股份有限公司 Temper mill roller cylinder working roll locking device and assembling method thereof

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CN112178003A (en) * 2020-09-16 2021-01-05 马鞍山钢铁股份有限公司 Temper mill roller cylinder working roll locking device and assembling method thereof
CN112178003B (en) * 2020-09-16 2023-07-21 马鞍山钢铁股份有限公司 Working roll locking device of leveling machine bending roll cylinder and assembly method thereof

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AU2003250179A1 (en) 2004-05-04
RU2313410C2 (en) 2007-12-27
EP1556178A1 (en) 2005-07-27
CA2498303C (en) 2010-09-14
ZA200501197B (en) 2005-09-12
CN100342988C (en) 2007-10-17
JP2006500225A (en) 2006-01-05
CN1681610A (en) 2005-10-12
BR0313605A (en) 2005-06-21
UA82333C2 (en) 2008-04-10
US20060021412A1 (en) 2006-02-02
WO2004033120A1 (en) 2004-04-22
RU2005111758A (en) 2005-09-20
EP1556178B1 (en) 2006-05-17
US20100018275A1 (en) 2010-01-28
ATE326295T1 (en) 2006-06-15
DE50303390D1 (en) 2006-06-22
CA2498303A1 (en) 2004-04-22
ES2260692T3 (en) 2006-11-01
KR20050057252A (en) 2005-06-16
JP4732752B2 (en) 2011-07-27
KR100990866B1 (en) 2010-10-29
BR0313605B1 (en) 2012-09-04

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