EP2125255A1 - Guiding device for the chocks of work rolls - Google Patents

Guiding device for the chocks of work rolls

Info

Publication number
EP2125255A1
EP2125255A1 EP07856037A EP07856037A EP2125255A1 EP 2125255 A1 EP2125255 A1 EP 2125255A1 EP 07856037 A EP07856037 A EP 07856037A EP 07856037 A EP07856037 A EP 07856037A EP 2125255 A1 EP2125255 A1 EP 2125255A1
Authority
EP
European Patent Office
Prior art keywords
guides
bending block
guide
guide device
work rolls
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
EP07856037A
Other languages
German (de)
French (fr)
Other versions
EP2125255B1 (en
Inventor
Edgar Filk
Heiko Zetzsche
Otmar Giesler
Andreas Berendes
Bernd Tiepelmann
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 Siemag 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=39149344&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2125255(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by SMS Siemag AG filed Critical SMS Siemag AG
Publication of EP2125255A1 publication Critical patent/EP2125255A1/en
Application granted granted Critical
Publication of EP2125255B1 publication Critical patent/EP2125255B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B21B31/02—Rolling stand frames or housings; Roll mountings ; Roll chocks
    • 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

Definitions

  • the invention relates to a Fuhrungsvor ⁇ chtung for the chock of work rolls of a rolling mill with fixed to the insides of the windows of the rolling mill or horizontally arranged guides, wherein the upper and the lower bending block each side are associated with two mutually parallel guides
  • the invention has for its object to simplify the leadership for the bending block and in particular to avoid or substantially reduce the friction occurring in the known systems
  • this object is achieved with a guiding device for the fitting pieces of work rolls of a rolling mill with guides fixed or horizontally movable on the insides of the windows of the rolling mill frame, with two guides arranged parallel to one another being assigned to each of the upper and lower bending blocks is characterized in that each bending block is associated with one of the guides, while it has a recess encompassing this for the parallel leadership, the upper Bending block is guided on one of the parallel guides and the lower bending block on the other guide.
  • each bending block has only one tube, which receives two slide bushings, so that this guide performs the actual leadership task.
  • a recess is then provided in this bending block.
  • associated other bending block serves this guide, for which a recess is provided in the aforementioned bending block, as the actual guide, while there is provided for the other guide a recess.
  • Bushings can be provided as plain bearings in the bending block.
  • anti-rotation sliding plates are provided on the front of the back bracket.
  • the guides can be designed as circular guides.
  • the guides are fastened by means of a holder in turn on the rolling stand.
  • the guide device can be provided with a horizontal displacement system.
  • 1 is a perspective view of the four bending blocks
  • 2 is a side view, partially in section
  • the bending system consists of 4 units 1 each with 2 bending bells 2,3 or 4,5 and a holder 20
  • Based on the one bending block 2 is then provided for the other leadership 6, a recess 10
  • the lower bending block 3 of this page then surrounds the guide 7 with a corresponding recess partially corresponding applies to the bending block of the other side
  • the work roll mounting pieces were designed in their contour so that the line of action of the bending cylinder is as close to the center of the bearing. This results in a design deviating from the previously used contour, but the advantages of rapid roll change are maintained
  • the bending system can be used in conventional design, as well as in connection with means for horizontal displacement (HS) of the work rolls. In both cases, the system can be combined with axial displacement devices (CVC, EDC, oa) -
  • FIG. 4 also shows an exemplary embodiment of the horizontal displacement using the example of the guide rods 6 and 7. This takes place here via wedge surfaces 14 and 15 and a displacement drive 16.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Metal Rolling (AREA)
  • Actuator (AREA)
  • Presses And Accessory Devices Thereof (AREA)
  • Bearings For Parts Moving Linearly (AREA)

Abstract

A guiding device for the chocks of work rolls of a rolling stand comprising guides arranged fixedly or horizontally movably on the inner sides of the windows of the rolling stand, wherein the upper and lower bending blocks of each side are respectively assigned two guides arranged parallel to each other. Each bending block is assigned one of the guides, while it has a recess for the parallel running guide that extends around said guide, wherein the upper bending block is guided on one of the parallel guides and the lower bending block is guided on the other guide.

Description

Führungsvorrichtung für die Einbaustücke von Arbeitswalzen Guide device for the chocks of work rolls
Die Erfindung betrifft eine Fuhrungsvorπchtung für die Einbaustucke von Arbeitswalzen eines Walzgerustes mit an den Innenseiten der Fenster des Walzgerustes fest oder horizontal beweglich angeordneten Fuhrungen, wobei dem oberen und dem unteren Biegeblock jeder Seite jeweils zwei parallel zueinander angeordnete Fuhrungen zugeordnet sindThe invention relates to a Fuhrungsvorπchtung for the chock of work rolls of a rolling mill with fixed to the insides of the windows of the rolling mill or horizontally arranged guides, wherein the upper and the lower bending block each side are associated with two mutually parallel guides
Beispiele für derartige Fuhrungsvornchtungen sind in der DE 39 06 618 C2 oder der EP 768 125 B 1 offenbartExamples of such Fühungsvornchtungen are disclosed in DE 39 06 618 C2 or EP 768 125 B 1
Bei der DE 39 06 618 C2 sind Haltestucke vorgesehen, die jeweils zwei Paar von Fuhrungen halten, wobei auf diesen Fuhrungen die Biegeblocke für das obere bzw das untere Einbaustuck gefuhrt sind Für die Fuhrung sind Fuhrungsrohre.-buchsen oder vergleichbare Elemente vorgesehen, die an den jeweiligen Enden der Biegeblocke vorgesehen sind Zur Verdrehsicherung weist jeder Biegeblock eine Fuhrungsbohrung auf, die ebenfalls mit einem Fuhrungslement versehen istIn DE 39 06 618 C2 holding pieces are provided, each holding two pairs of guides, which are guided on these guides the bending block for the upper and lower chimney for the leadership Fuhrungsrohre.-jacks or similar elements are provided to the To prevent rotation of each bending block has a Fuhrungsbohrung, which is also provided with a Fuhrungslement
Bei der aus der EP 768 125 B1 bekannten Losung sind an Stelle von Rohren als Fuhrung Stangen oder Zylinderstabe vorgesehenIn the solution known from EP 768 125 B1, rods or cylinder rods are provided instead of tubes as guides
Der Erfindung liegt die Aufgabe zugrunde, die Fuhrung für die Biegeblocke zu vereinfachen und insbesondere die bei den bekannten Systemen auftretende Reibung zu vermeiden bzw wesentlich zu verringernThe invention has for its object to simplify the leadership for the bending block and in particular to avoid or substantially reduce the friction occurring in the known systems
Gelost wird diese Aufgabe erfindungsgemaß mit einer Fuhrungsvorπchtung für die Einbaustucke von Arbeitswalzen eines Walzgerustes mit an den Innenseiten der Fenster des Walzgerustes fest oder horizontal beweglich angeordneten Fuhrungen, wobei dem oberen und dem unteren Biegeblock jeder Seite jeweils zwei parallel zueinander angeordnete Fuhrungen zugeordnet sind, die dadurch gekennzeichnet ist, dass jedem Biegeblock eine der Fuhrungen zugeordnet ist, wahrend es für die parallel verlaufende Fuhrung eine diese umgreifende Ausnehmung aufweist, wobei der obere Biegeblock auf der einen der parallelen Führungen geführt ist und der untere Biegeblock auf der anderen Führung.According to the invention, this object is achieved with a guiding device for the fitting pieces of work rolls of a rolling mill with guides fixed or horizontally movable on the insides of the windows of the rolling mill frame, with two guides arranged parallel to one another being assigned to each of the upper and lower bending blocks is characterized in that each bending block is associated with one of the guides, while it has a recess encompassing this for the parallel leadership, the upper Bending block is guided on one of the parallel guides and the lower bending block on the other guide.
Hierbei handelt es sich um ein System, das wie das bisher bekannte System der Walzenbiegung mit Biegeblöcken (Führungsstücken) arbeitet. Grundsätzlich anders ist die Art und Weise in der die Biegeblöcke geführt werden. Dies dient dazu die Reibung im System signifikant zu verringern.This is a system that works like the previously known system of roll bending with bending blocks (guide pieces). Basically, the way in which the bending blocks are guided is different. This serves to significantly reduce the friction in the system.
Bei der erfindungsgemäßen Lösung sind ebenfalls zwei Führungen je Führungsvorrichtung vorgesehen, aber jeder Biegeblock weist nur ein Rohr auf, das zwei Gleitbuchsen aufnimmt, so dass diese Führung die eigentliche Führungsaufgabe wahrnimmt. Für die zweite Führung ist in diesem Biegeblock dann eine Ausnehmung vorgesehen. Beim zugeordneten anderen Biegeblock dient dann diese Führung, für die im vorher genannten Biegeblock eine Ausnehmung vorgesehen ist, als eigentliche Führung, während für die andere Führung dort eine Ausnehmung vorgesehen ist. Somit kommt für die Führung eines Biegeblockes jeweils nur eine Führung der Führungsvorrichtung zum Einsatz.In the solution according to the invention two guides per guide device are also provided, but each bending block has only one tube, which receives two slide bushings, so that this guide performs the actual leadership task. For the second guide, a recess is then provided in this bending block. When associated other bending block then serves this guide, for which a recess is provided in the aforementioned bending block, as the actual guide, while there is provided for the other guide a recess. Thus, only one guide of the guide device is used for the guidance of a bending block.
Im Biegeblock können Buchsen als Gleitlager vorgesehen sein.Bushings can be provided as plain bearings in the bending block.
Als Verdrehsicherung sind an der Vorderseite der rückseitigen Halterung Gleitplatten vorgesehen.As anti-rotation sliding plates are provided on the front of the back bracket.
Die Führungen können als Rundführungen ausgebildet sein.The guides can be designed as circular guides.
Vorzugsweise sind die Führungen mittels einer Halterung ihrerseits am Walzgerüst befestigt.Preferably, the guides are fastened by means of a holder in turn on the rolling stand.
Schließlich kann die Führungsvorrichtung mit einem Horizontalverschiebesystem versehen sein.Finally, the guide device can be provided with a horizontal displacement system.
Die erfindungsgemäße Lösung soll nachfolgend mit Bezug auf die Zeichnungen erläutert werden.The solution according to the invention will be explained below with reference to the drawings.
Dabei zeigt:Showing:
Fig. 1 eine perspektivische Darstellung der vier Biegeblöcke, Fig 2 eine Seitenansicht, teilweise geschnitten,1 is a perspective view of the four bending blocks, 2 is a side view, partially in section,
Fig 3 die Halterung der Fuhrungsstangen im Detail und3 shows the mounting of the guide rods in detail and
Fig 4 ein Ausfuhrungsbeispiel für die Hoπzontalverschiebung4 shows an exemplary embodiment of Hoπzontalverschiebung
Bei der Darstellung der erfindungsgemaßen Losung wurden zur Vereinfachung nur die Teile dargestellt, auf die es für das Verständnis ankommtIn the presentation of the solution according to the invention, only the parts which are important for the understanding are shown for the sake of simplicity
Das Biegesystem besteht aus 4 Einheiten 1 mit je 2 Biegeblocken 2,3 bzw 4,5 und einer Halterung 20The bending system consists of 4 units 1 each with 2 bending bells 2,3 or 4,5 and a holder 20
Pro Halterung gibt es 2 Fuhrungsstangen 6 und 7 bzw 8 und 9, welche beispielsweise am Walzenstander befestigt ist Auf jeder Fuhrungstange 6 bzw 7 ist jeweils ein Biegeblock gefuhrt, und zwar der obere Biegeblock 2 der einen Seite auf der Fuhrung 7, der untere Biegeblock 3 dieser Seite auf der Fuhrung 6 und entsprechend auf der anderen Seite, der obere Biegeblock 4 auf der Fuhrung 8 und der untere Biegeblock 5 auf der Fuhrung 9 Bezogen auf den einen Biegeblock 2 ist dann für die andere Fuhrung 6 eine Ausnehmung 10 vorgesehen Der untere Biegeblock 3 dieser Seite umgreift dann die Fuhrung 7 mit einer entsprechenden Ausnehmung teilweise Entsprechendes gilt für die Biegeblocke der andere SeitePer guide there are 2 Fuhrungsstangen 6 and 7 or 8 and 9, which is fixed, for example, on the roll stand on each Fuhrungstange 6 and 7 respectively a bending block is guided, namely the upper bending block 2 one side on the guide 7, the lower bending block This page on the leadership 6 and accordingly on the other side, the upper bending block 4 on the leadership 8 and the lower bending block 5 on the leadership 9 Based on the one bending block 2 is then provided for the other leadership 6, a recess 10 The lower bending block 3 of this page then surrounds the guide 7 with a corresponding recess partially corresponding applies to the bending block of the other side
Eine weitere Besonderheit im Gegensatz zu früheren Ausfuhrungen ist hier die Lange derAnother special feature in contrast to earlier versions is the length of the
FuhrungGuide
Im Biegeblock sitzen Buchsen als Gleitlager, an der Halterung 20 sind Gleitleisten 11 alsIn the bending block bushes sit as plain bearings, on the holder 20 are sliding strips 11 as
Verdrehsicherung vorgesehenAnti-rotation provided
Im unteren Biegeblock sitzen bei dem dargestellten Ausfuhrungsbeispiel 2 Biegezylinder 12, die mit ihrem Stangenkopf 13 am oberen Biegeblock angreifen Eine Ausfuhrung mit einem Zylinder ist ebenfalls möglich Die rückseitige Halterung 20 dient auch als vertikaler Anschlag für die ZylinderbewegungenIn the lower bending block sitting in the illustrated embodiment 2 bending cylinder 12, which attack with its rod end 13 on the upper bending block An execution with a cylinder is also possible The rear bracket 20 also serves as a vertical stop for the cylinder movements
Die Arbeitswalzeneinbaustucke wurden in ihrer Kontur so gestaltet das die Wirkungslinie der Biegezylinder möglichst nahe der Lagermitte liegt Daraus ergibt sich eine vom bisher verwendeten Design abweichende Kontur, jedoch bleiben die Vorteile des schnellen Walzenwechsels erhalten Das Biegesystem ist einsetzbar in konventioneller Bauart, wie auch in Verbindung mit Einrichtungen zur horizontalen Verschiebung (HS) der Arbeitswalzen. In beiden Fällen ist das System kombinierbar mit Axialverschiebeeinrichtungen (CVC, EDC, o.a.)-The work roll mounting pieces were designed in their contour so that the line of action of the bending cylinder is as close to the center of the bearing. This results in a design deviating from the previously used contour, but the advantages of rapid roll change are maintained The bending system can be used in conventional design, as well as in connection with means for horizontal displacement (HS) of the work rolls. In both cases, the system can be combined with axial displacement devices (CVC, EDC, oa) -
In der Figur 3 ist die Halterung 20 für die Führungsstangen, in diesem Fall 6 und 7, vergrößert dargestellt.In the figure 3, the holder 20 for the guide rods, in this case 6 and 7, shown enlarged.
Schließlich zeigt die Figur 4 noch ein Ausführungsbeispiel für die Horizontalverschiebung am Beispiel der Führungsstangen 6 und 7. Diese erfolgt hier über Keilflächen 14 und 15 und einen Verschiebeantrieb 16. Finally, FIG. 4 also shows an exemplary embodiment of the horizontal displacement using the example of the guide rods 6 and 7. This takes place here via wedge surfaces 14 and 15 and a displacement drive 16.

Claims

Patentansprüche claims
1. Führungsvorrichtung für die Einbaustücke von Arbeitswalzen eines Walzgerüstes mit an den Innenseiten der Fenster des Walzgerüstes fest oder horizontal beweglich angeordneten Führungen (6,7,8,9), wobei dem oberen und dem unteren Biegeblock (2,3;4,5) jeder Seite jeweils zwei parallel zueinander angeordnete Führungen (6,7;8,9) zugeordnet sind, dadurch gekennzeichnet, dass jedem Biegeblock (2-5) eine der Führungen (6-9) zugeordnet ist, während er für die parallel verlaufende Führung eine diese umgreifende Ausnehmung (10) aufweist, wobei der obere Biegeblock (2;4) auf der einen der parallelen Führungen (7;8) geführt ist und der untere Biegeblock (3;5) auf der anderen Führung (6;9).1. guide device for the chocks of work rolls of a roll stand with fixed to the inner sides of the windows of the rolling stand or horizontally movable guides (6,7,8,9), wherein the upper and the lower bending block (2,3; 4,5) each side are associated with two mutually parallel guides (6,7, 8,9), characterized in that each bending block (2-5) one of the guides (6-9) is associated, while he for the parallel guide a this encompassing recess (10), wherein the upper bending block (2; 4) on one of the parallel guides (7; 8) is guided and the lower bending block (3; 5) on the other guide (6; 9).
2. Führungsvorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass im Biegeblock Buchsen als Gleitlager vorgesehen sind.2. Guide device according to claim 1, characterized in that bushings are provided as a sliding bearing in the bending block.
3. Führungsvorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass an der Vorderseite der rückseitigen Halterung (20) Gleitplatten (11) als Verdrehsicherung vorgesehen sind.3. Guide device according to one of the preceding claims, characterized in that on the front side of the rear holder (20) sliding plates (11) are provided as anti-rotation.
4. Führungsvorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Führungen als Rundführungen ausgebildet sind.4. Guide device according to one of the preceding claims, characterized in that the guides are designed as circular guides.
5. Führungsvorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Führungen mittels einer Halterung (20) ihrerseits am Walzgerüst befestigt sind.5. Guide device according to one of the preceding claims, characterized in that the guides are fastened by means of a holder (20) in turn on the roll stand.
6. Führungsvorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass sie mit einem Horizontalverschiebesystem versehen ist. 6. Guide device according to one of the preceding claims, characterized in that it is provided with a horizontal displacement system.
EP07856037A 2007-01-03 2007-11-27 Guiding device for the chocks of work rolls Active EP2125255B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007001322A DE102007001322A1 (en) 2007-01-03 2007-01-03 Guide device for the chocks of work rolls
PCT/DE2007/002144 WO2008080376A1 (en) 2007-01-03 2007-11-27 Guiding device for the chocks of work rolls

Publications (2)

Publication Number Publication Date
EP2125255A1 true EP2125255A1 (en) 2009-12-02
EP2125255B1 EP2125255B1 (en) 2011-10-19

Family

ID=39149344

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07856037A Active EP2125255B1 (en) 2007-01-03 2007-11-27 Guiding device for the chocks of work rolls

Country Status (12)

Country Link
US (1) US8225637B2 (en)
EP (1) EP2125255B1 (en)
JP (1) JP5386368B2 (en)
KR (1) KR101127408B1 (en)
CN (1) CN101563173B (en)
AT (1) ATE529200T1 (en)
BR (1) BRPI0720753B1 (en)
CA (1) CA2674126C (en)
DE (1) DE102007001322A1 (en)
ES (1) ES2373127T3 (en)
RU (1) RU2429924C2 (en)
WO (1) WO2008080376A1 (en)

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Publication number Priority date Publication date Assignee Title
DE10243677A1 (en) * 2002-09-20 2004-04-01 Sms Demag Ag 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
DE102008032522A1 (en) * 2008-07-10 2010-01-14 Sms Siemag Aktiengesellschaft Rolling device with adjusting device
JP5311206B2 (en) * 2008-12-05 2013-10-09 大日本印刷株式会社 Nip roll mechanism
DE102022203570A1 (en) * 2022-04-08 2023-10-12 Sms Group Gmbh Guide device for chocks of work rolls in a roll stand

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DE1260283B (en) * 1965-01-20 1968-02-01 Franz Ropohl Device for cleaning dust-laden fiber fleece air filter packs by means of a purge air stream
GB1402696A (en) * 1972-10-18 1975-08-13 Schloemann Ag Roll stand
JPH0749124B2 (en) * 1986-03-20 1995-05-31 株式会社日立製作所 Roll shift rolling mill
DE3906618C2 (en) 1989-03-02 1997-03-27 Schloemann Siemag Ag Guide device for the chocks of work rolls of a roll stand
DE4314472A1 (en) * 1993-05-03 1994-11-10 Schloemann Siemag Ag Bending block for bending the rolls of multi-roll stands
FR2718311A1 (en) * 1994-03-30 1995-10-06 Trt Telecom Radio Electr Device for implementing a message signature system and chip card comprising such a device.
DE19536042A1 (en) 1995-09-28 1997-04-03 Schloemann Siemag Ag Guide device for four or multi-roll stands
DE19922373A1 (en) * 1999-05-14 2000-11-16 Sms Demag Ag Ingots used in hot rolling have a double acting hydraulic piston cylinder unit with both ends connected to guide pieces
US6748782B1 (en) 2000-03-01 2004-06-15 Hitachi, Ltd. Rolling mill, looseness eliminating device of roll bearing housing, rolling method, method of modifying rolling mill, and hot finishing tandem rolling equipment
EP1184094A3 (en) * 2000-08-29 2004-12-22 Hitachi, Ltd. Rolling mill and rolling method
JP4484376B2 (en) * 2001-01-22 2010-06-16 アイセル株式会社 Guide device
DE10150690A1 (en) * 2001-10-17 2003-04-30 Sms Demag Ag rolling device
DE50214899D1 (en) * 2001-12-12 2011-03-17 Sms Siemag Ag DEVICE FOR MEASURING THE ROLL OF THE ROLL BETWEEN WORKING ROLLERS OF A COLD OR WARM ROLLING SCAFFOLD

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Also Published As

Publication number Publication date
CN101563173A (en) 2009-10-21
KR20090096608A (en) 2009-09-11
EP2125255B1 (en) 2011-10-19
US8225637B2 (en) 2012-07-24
CA2674126A1 (en) 2008-07-10
US20100313622A1 (en) 2010-12-16
JP5386368B2 (en) 2014-01-15
BRPI0720753A2 (en) 2014-01-21
RU2429924C2 (en) 2011-09-27
JP2010514573A (en) 2010-05-06
ES2373127T3 (en) 2012-01-31
WO2008080376A1 (en) 2008-07-10
KR101127408B1 (en) 2012-03-22
RU2009129517A (en) 2011-02-10
ATE529200T1 (en) 2011-11-15
CN101563173B (en) 2011-05-11
BRPI0720753B1 (en) 2019-08-13
CA2674126C (en) 2013-04-02
DE102007001322A1 (en) 2008-07-10

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