EP1601475A1 - Rolling frame and method for adjusting said rolling frame - Google Patents

Rolling frame and method for adjusting said rolling frame

Info

Publication number
EP1601475A1
EP1601475A1 EP04719924A EP04719924A EP1601475A1 EP 1601475 A1 EP1601475 A1 EP 1601475A1 EP 04719924 A EP04719924 A EP 04719924A EP 04719924 A EP04719924 A EP 04719924A EP 1601475 A1 EP1601475 A1 EP 1601475A1
Authority
EP
European Patent Office
Prior art keywords
roller
roll stand
spindles
adjusting
chocks
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
EP04719924A
Other languages
German (de)
French (fr)
Other versions
EP1601475B1 (en
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
Publication of EP1601475A1 publication Critical patent/EP1601475A1/en
Application granted granted Critical
Publication of EP1601475B1 publication Critical patent/EP1601475B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • B21B31/04—Rolling stand frames or housings; Roll mountings ; Roll chocks with tie rods in frameless stands, e.g. prestressed tie rods
    • 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
    • B21B13/08—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with differently-directed roll axes, e.g. for the so-called "universal" rolling process
    • B21B13/10—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with differently-directed roll axes, e.g. for the so-called "universal" rolling process all axes being arranged in one plane
    • 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
    • B21B31/02—Rolling stand frames or housings; Roll mountings ; Roll chocks
    • B21B31/028—Prestressing of rolls or roll mountings in stand frames
    • 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
    • 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
    • B21B37/007—Control for preventing or reducing vibration, chatter or chatter marks

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Control Of Metal Rolling (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • Rolling Contact Bearings (AREA)
  • Heat Treatment Of Steel (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)

Abstract

The columns provide guidance for the roller insert (2) and accommodate flexure blocks. A short-stroke adjustment cylinder (7) is located between the lower roller support insert (8) and the lower traverse (5). By separate arrangement of the tension spindles (3) and the roller insert (2) in the machine frame columns (1), the functions of force transmission onto the rollers and guidance for the roller inserts (2) are separated. An independent claim is included for the corresponding method of adjustment.

Description

Walzgerüst und Verfahren zur Einstellung des WalzgerüstesRoll stand and method for adjusting the roll stand
Beschreibungdescription
Die Erfindung betrifft ein Walzgerüst und ein Verfahren zur Einstellung des Walzgerüstes für den Walzbetrieb.The invention relates to a roll stand and a method for adjusting the roll stand for the rolling operation.
Walzgerüste bestehen in der Regel aus zwei Walzenständern mit einer regelbarenRoll stands usually consist of two roll stands with an adjustable one
Walzenanstellung und einer Hilfsanstellung zum Erreichen einer konstanten Passlinie. Durch die Konstruktion bedingt schnürt sich das Ständerfenster bei Walzkraftbeaufschlagung ein. Bei unterschiedlichen Walzkräften liegen im Ständerfenster unterschiedliche Spiele zwischen Walzenständer und Walzeneinbaustücken vor.Roller adjustment and an auxiliary adjustment to achieve a constant pass line. Due to the construction, the stand window constricts when the rolling force is applied. With different rolling forces, there are different games in the stand window between the roll stand and roll chocks.
Aus der DE 21 44 511 B2 ist ein Universalwalzgerüst bekannt, bestehend aus einem geschlossenen Rahmen für die Vertikalwalzen und Einbaustücken für die Horizontalwalzen, die sich an oberen und unteren Traversen abstützen. Die Traversen sind durch Zugspindeln, die durch den Rahmen hindurchgehen und in diesem axial unverschieblich und drehbeweglich gelagert sind, miteinander so verbunden, dass sie - und damit die Horizontalwalzen - zentrisch zur Walz-oder Passlinie anstellbar sind. Der Rahmen sitzt direkt auf der Sohlplatte des Fundaments auf.A universal roll stand is known from DE 21 44 511 B2, consisting of a closed frame for the vertical rolls and chocks for the horizontal rolls, which are supported on upper and lower cross members. The traverses are connected to one another by means of traction spindles which pass through the frame and are axially immovable and rotatably mounted in such a way that they - and thus the horizontal rollers - can be adjusted centrally to the rolling or fitting line. The frame sits directly on the base plate of the foundation.
Nach der DE 697 12 772 T2 ist ein Walzgerüst bekannt, welches aus vier Ständersäulen, die mit einer Sohlplatte fest verankert sind und in denen axial unverschiebbar geführte, drehbeweglich gelagerte Zugspindein angeordnet sind, deren obere und untere Enden mit gegenläufigen Gewinden versehen sind, die eine obere und untere Traverse aufnehmen und über die Walzensätze gegenläufig zueinander verstellbar sind, besteht. Die Ständersäulen dienen gleichzeitig als Führungen für Walzeneinbaustücke, zwischen dem unteren Stützwalzeneinbausatz und der unteren Traverse sind Kurzhub-Ansteilzylinder zur Walzkraftbeaufschlagung angeordnet.According to DE 697 12 772 T2, a rolling stand is known, which consists of four column columns, which are firmly anchored with a base plate and in which axially non-displaceable, rotatably mounted traction screws are arranged, the upper and lower ends of which are provided with opposing threads, one of which take up the upper and lower crossbeam and are adjustable via the roller sets in opposite directions. The stand columns also serve as guides for roller chocks, and short-stroke proportion cylinders are arranged between the lower backup roller installation kit and the lower traverse to apply the rolling force.
Die Schrift US 4 712 416 A offenbart ein Sexto-Walzgerüst mit einem Horizontal-Versatz der Arbeitswalzen. Der Erfindung liegt die Aufgaben zugrunde, ein neues Konstruktionsprinzip für Walzgerüste zu schaffen, die sich ohne andere Hilfsmittel immer wieder auf eine konstante Passlinie einstellen.The document US 4 712 416 A discloses a six-high roll stand with a horizontal offset of the work rolls. The invention is based on the objects of creating a new design principle for roll stands which adjust themselves to a constant pass line again and again without other aids.
Gelöst wird diese Aufgabe erfindungsgemäß durch die Kombination der folgenden Merkmale:According to the invention, this object is achieved by combining the following features:
Das Walzgerüst, bestehend aus vier Ständersäulen, die mit einer Sohlplatte fest verankert sind und in denen jeweils axial unverschiebbar geführte, drehbeweglich gelagerte Zugspindeln angeordnet sind, deren obere und untere Enden mit gegenläufigen Gewinden versehen sind, die eine obere und untere Traverse aufnehmen und über die dieThe rolling stand, consisting of four stand columns, which are firmly anchored with a base plate and in which axially non-displaceable, rotatably mounted traction spindles are arranged, the upper and lower ends of which are provided with opposing threads that receive an upper and lower crossbeam and over which the
Walzensätze gegenläufig zueinander verstellbar sind, wobei die Ständersäulen gleichzeitig als Führungen für Walzeneinbaustücke und der Aufnahme von Biegeblöcken dienen, und einem zwischen dem unteren Stützwalzeneinbausatz und der unteren Traverse angeordneten Kurzhub-Anstellzylinder zur Walzkraftbeaufschlagung, wobei durch eine getrennte Anordnung der Zugspindeln und der Walzeneinbaustücke in den Ständersäulen eine Trennung der Kraftübertragung auf die Walzen und der Führung der Walzeneinbaustücke zu erreichen ist.Roller sets are adjustable in opposite directions to one another, the stand columns simultaneously serving as guides for roller chocks and the accommodation of bending blocks, and a short-stroke adjusting cylinder arranged between the lower support roller installation set and the lower cross member for applying rolling force, with a separate arrangement of the tension spindles and the roller chocks in the Stand columns a separation of the power transmission to the rollers and the leadership of the roller chocks can be achieved.
Des Weiteren wird die Aufgabe durch ein Verfahren zur Einstellung des Walzgerüstes mit den Merkmalen des Patentanspruches 5 gelöst.Furthermore, the object is achieved by a method for adjusting the rolling stand with the features of claim 5.
Weiterbildungen ergeben sich aus den Unteransprüchen.Further training results from the subclaims.
Der Erfindung liegt die Funktionsweise zugrunde, über ein Rechts- und Links- Gewinde gegenüberliegende Teile gleichmäßig (oder ungleichmäßig) aufeinander zu oder voneinander weg zu bewegen. Gleichzeitig wird die Funktion der Übertragung der Walzkraft von der Funktion "Führung der Walzeneinbaustücke" getrennt, wodurch Nachteile, wie Walzenständer-Fensterverengung, nicht mehr auftreten. Hierdurch wird auch die Neigung zu "Brummern" wesentlich beeinflusst.The invention is based on the function of moving parts opposite one another evenly (or unevenly) towards or away from one another via a right and left thread. At the same time, the function of transferring the rolling force is separated from the function "guiding the roll chocks", which means that disadvantages such as roll stand window narrowing no longer occur. This also has a significant influence on the tendency to "humming".
Die Erfindung soll nachfolgend an der Zeichnung erläutert werden, wobei die Figur eine schematische Seitenansicht, teilweise geschnitten, des Walzgerüstes zeigt.The invention will be explained below with reference to the drawing, the figure showing a schematic side view, partly in section, of the roll stand.
Die Konstruktion besteht im wesentlichen aus vier geschweißten Ständersäulen 1 , die die Führung der Walzeneinbaustücke 2 sowie die Aufnahme der Zugspindeln 3 übernehmen. Die Zugspindeln 3, die die Walzkraft über die oberen und unteren Traversen 4 und 5 übertragen, bewegen diese aufeinander zu oder voneinander weg. Die Ständersäulen 1 sind mit dem Fundament, d.h. der Sohlplatte 6 vergossen und über Ankerschrauben befestigt. Die Auslegung für die Steifigkeit erfolgt nach den zu erwartenden Belastungen durch die Walzeneinbaustücke 2. Die Zugspindeln 3 mit ihrem Rechts- und Links-Gewinde werden im unbelasteten Walzgerüst auf Position gefahren. Erst dann wird über einen Kurzhub- Anstellzylinder 7 die Walzkraft eingestellt und - wie angegeben - im Betriebszustand über die Traversen in die Zugstangen eingeleitet. Die Auslegung erfolgt nach den zu erwartenden max. Walzkräften. Die Selbsthemmung im Walzbetrieb ist durch die kleine Steigung im Gewinde gewährleistet, wobei zusätzlich über eine Bremse im Versteilantrieb die Position gesichert werden kann. In der dem Kurzhub - Anstell∑ylinder 7 gegenüberliegenden oberen Traverse 4 kann für kleinere Anstellkräfte noch ein zusätzlicher kleiner Anstellzylinder (nicht dargestellt) eingebaut sein.The construction consists essentially of four welded stator columns 1, which take over the guiding of the roller chocks 2 and the accommodation of the tension spindles 3. The tension spindles 3, which transmit the rolling force via the upper and lower cross members 4 and 5, move them towards or away from one another. The column columns 1 are cast with the foundation, ie the base plate 6, and fastened by means of anchor bolts. The design for the rigidity is based on the expected loads from the roller chocks 2. The traction screws 3 with their right and left thread are moved into position in the unloaded roll stand. Only then is the rolling force set via a short-stroke adjusting cylinder 7 and - as indicated - introduced into the tie rods in the operating state via the crossbeams. The design is based on the expected max. Rolling forces. The self-locking in rolling operation is guaranteed by the small pitch in the thread, whereby the position can also be secured by a brake in the adjusting drive. An additional small positioning cylinder (not shown) can be installed in the upper cross member 4 opposite the short stroke positioning cylinder 7 for smaller positioning forces.
Die Zugspindeln 3 werden über vier synchronisierte Einzelantriebe oder auch über einen Antrieb mit mechanischem Gleichlauf angetrieben. Die obere- und die untere Traverse 4 und 5 bewegen sich je nach Drehsinn der Zugspindeln aufeinander zu oder voneinander weg. Hierbei stellt sich bei je gleichem Walzendurchmesser (StW, ZW, AW) die AW immer auf Passlinie ein.The traction spindles 3 are driven by four synchronized individual drives or also by a drive with mechanical synchronism. The upper and lower traverse 4 and 5 move towards or away from each other depending on the direction of rotation of the tension spindles. Here, the AW always adjusts to the pass line for the same roll diameter (StW, ZW, AW).
Alle Komponenten sind einfach zu bearbeitende Fertigungsteile. Ein weiterer Vorteil sind die niedrigen Gewichte der Einzelkomponenten zur Montage. All components are easy to machine production parts. Another advantage is the low weight of the individual components for assembly.

Claims

Patentansprüche claims
1. Walzgerüst, bestehend aus vier Ständersäulen (1 ), die mit einer Sohlplatte (6) fest verankert sind und in denen axial unverschiebbar geführte, drehbeweglich gelagerte Zugspindeln (3) angeordnet sind, deren obere und untere Enden mit gegenläufigen1. Roll stand, consisting of four stand columns (1), which are firmly anchored with a base plate (6) and in which axially non-displaceable, rotatably mounted traction spindles (3) are arranged, the upper and lower ends of which are in opposite directions
Gewinden versehen sind, die eine obere und untere Traverse (4,5) aufnehmen und über die Walzensätze gegenläufig zueinander verstellbar sind, wobei die Ständersäulen (1) gleichzeitig als Führungen für Walzeneinbaustücke (2) und der Aufnahme von Biegeblöcken dienen und einem zwischen dem unteren Stützwalzeneinbausatz (8) und der unteren Traverse (5) angeordneten Kurzhub-Anstellzylinder (7) zur Walzkraftbeaufschlagung, wobei durch eine getrennte Anordnung der Zugspindeln (3) und der Walzeneinbaustücke (2) in den Ständersäulen (1 ) eine Trennung der Kraftübertragung auf die Walzen und der Führung der Walzeneinbaustücke (2) zu erreichen ist.Threads are provided, which receive an upper and lower traverse (4,5) and can be adjusted in opposite directions via the roller sets, whereby the stand columns (1) also serve as guides for roller chocks (2) and the accommodation of bending blocks, and one between the lower one Back-up roller installation kit (8) and the lower traverse (5) arranged short-stroke adjusting cylinders (7) for applying the rolling force, whereby the power transmission to the rollers is separated by a separate arrangement of the tension spindles (3) and the roller chocks (2) in the stand columns (1) and the guidance of the roller chocks (2) can be reached.
2. Walzgerüst nach Anspruch 1 , dadurch gekennzeichnet, dass es ein Duo-, Quarto- oder Sexto-Walzgerüst ist.2. Roll stand according to claim 1, characterized in that it is a duo, quarto or six-high roll stand.
3. Walzgerüst nach Anspruch 1 , dadurch gekennzeichnet, dass zwischen dem oberen einem Stützwalzeneinbausatz und der dazugehörenden Traverse (4,5) ein zusätzlicher Anstellzylinder angeordnet ist.3. Roll stand according to claim 1, characterized in that an additional adjusting cylinder is arranged between the upper one of a support roller installation kit and the associated cross member (4, 5).
4. Walzgerüst nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Gewinde der Zugspindeln (3) selbsthemmend ausgelegt sind.4. Roll stand according to one of the preceding claims, characterized in that the threads of the tension spindles (3) are designed to be self-locking.
5. Verfahren zur Einstellung des Walzgerüstes nach Anspruch 1 für den Walzbetrieb, dadurch gekennzeichnet, dass zunächst die Stütz-und Arbeitswalzen durch Betätigung der Zugspindeln (3) im unbelasteten Walzgerüst aufeinander zu und auf Position zur Passlinie gefahren werden und dass anschließend über den Kurzhub-Anstellzylinder (7) die Walzenanstellkraft eingestellt wird. 5. The method for adjusting the roll stand according to claim 1 for the rolling operation, characterized in that first the support and work rolls are moved towards one another and into position with respect to the pass line by actuating the pull spindles (3) in the unloaded roll stand and that then via the short stroke Setting cylinder (7) the roller positioning force is set.
EP04719924A 2003-03-13 2004-03-12 Rolling frame and method for adjusting said rolling frame Expired - Lifetime EP1601475B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10312122 2003-03-13
DE10312122A DE10312122B3 (en) 2003-03-13 2003-03-13 Four-column rolling mill is designed to separate force transmission onto rollers from guidance of roller inserts
PCT/DE2004/000557 WO2004080622A1 (en) 2003-03-13 2004-03-12 Rolling frame and method for adjusting said rolling frame

Publications (2)

Publication Number Publication Date
EP1601475A1 true EP1601475A1 (en) 2005-12-07
EP1601475B1 EP1601475B1 (en) 2007-05-30

Family

ID=32695233

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04719924A Expired - Lifetime EP1601475B1 (en) 2003-03-13 2004-03-12 Rolling frame and method for adjusting said rolling frame

Country Status (11)

Country Link
US (2) US20060191308A1 (en)
EP (1) EP1601475B1 (en)
JP (1) JP4733629B2 (en)
CN (1) CN100355512C (en)
AT (1) ATE363346T1 (en)
DE (2) DE10312122B3 (en)
MY (1) MY139439A (en)
RU (1) RU2346770C2 (en)
TW (1) TWI315220B (en)
UA (1) UA83819C2 (en)
WO (1) WO2004080622A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10312122B3 (en) * 2003-03-13 2004-08-12 Sms Demag Ag Four-column rolling mill is designed to separate force transmission onto rollers from guidance of roller inserts
JP4608354B2 (en) * 2005-04-11 2011-01-12 新日本製鐵株式会社 Thick steel plate skin pass rolling machine and skin pass rolling method
DE102009058876A1 (en) * 2009-01-23 2010-07-29 Sms Siemag Ag Bending and balancing device for axially displaceable work rolls of a roll stand
DE102009039501A1 (en) 2009-08-31 2011-03-03 Sms Siemag Ag Method for adjusting the rolls of a roll stand and roll stand
CN103506401A (en) * 2013-09-09 2014-01-15 芜湖汉光立体停车设备有限公司 Novel roller adjusting mechanism
CN104668289B (en) * 2015-01-23 2017-02-22 合肥市百胜科技发展股份有限公司 Rolling mill rack
CN104889169B (en) * 2015-05-18 2017-01-25 中国重型机械研究院股份公司 Roller axial position adjusting device
DE102021130840A1 (en) 2021-08-10 2023-02-16 Sms Group Gmbh Cross-rolling unit and method for adjusting a roll gap

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IT1174098B (en) * 1984-05-28 1987-07-01 Pomini Farrel Spa LAMINATION CAGE OF THE TYPE OF TIE RODS WITH OSCILATING SUPPORTS WITH INTERMEDIATE SUPPORT BASES
DE3615960A1 (en) * 1985-05-13 1986-11-27 Toyota Motor Co Ltd SENSOR FOR DETERMINING A AIR-FUEL RATIO
DE4314472A1 (en) * 1993-05-03 1994-11-10 Schloemann Siemag Ag Bending block for bending the rolls of multi-roll stands
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IT1310543B1 (en) * 1999-03-08 2002-02-18 Simac Spa REMOVABLE LAMINATION CAGE
DE10121078A1 (en) * 2001-04-25 2002-10-31 Sms Demag Ag Roll stand for web-shaped rolling stock
DE10312122B3 (en) * 2003-03-13 2004-08-12 Sms Demag Ag Four-column rolling mill is designed to separate force transmission onto rollers from guidance of roller inserts

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Title
See references of WO2004080622A1 *

Also Published As

Publication number Publication date
EP1601475B1 (en) 2007-05-30
US20060191308A1 (en) 2006-08-31
DE502004003958D1 (en) 2007-07-12
JP4733629B2 (en) 2011-07-27
RU2005131612A (en) 2006-02-20
TW200510086A (en) 2005-03-16
DE10312122B3 (en) 2004-08-12
TWI315220B (en) 2009-10-01
ATE363346T1 (en) 2007-06-15
MY139439A (en) 2009-10-30
RU2346770C2 (en) 2009-02-20
JP2006519702A (en) 2006-08-31
WO2004080622A1 (en) 2004-09-23
UA83819C2 (en) 2008-08-26
CN100355512C (en) 2007-12-19
US20080016932A1 (en) 2008-01-24
CN1747801A (en) 2006-03-15

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