EP1814679A1 - Method for production of a seamless hot-finished steel tube and device for carrying out said method - Google Patents

Method for production of a seamless hot-finished steel tube and device for carrying out said method

Info

Publication number
EP1814679A1
EP1814679A1 EP05803680A EP05803680A EP1814679A1 EP 1814679 A1 EP1814679 A1 EP 1814679A1 EP 05803680 A EP05803680 A EP 05803680A EP 05803680 A EP05803680 A EP 05803680A EP 1814679 A1 EP1814679 A1 EP 1814679A1
Authority
EP
European Patent Office
Prior art keywords
forging
hollow block
forming
rolling
finished
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
EP05803680A
Other languages
German (de)
French (fr)
Other versions
EP1814679B1 (en
Inventor
Christoph Prasser
Rolf Kümmerling
Stefan Wiedenmaier
Pierre Lefebvre
Rupert Wieser
Robert Koppensteiner
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.)
V&M Deutschland GmbH
Original Assignee
V&M Deutschland GmbH
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
Priority to DE102004052406 priority Critical
Priority to DE102005052178A priority patent/DE102005052178B4/en
Application filed by V&M Deutschland GmbH filed Critical V&M Deutschland GmbH
Priority to PCT/DE2005/001944 priority patent/WO2006045301A1/en
Publication of EP1814679A1 publication Critical patent/EP1814679A1/en
Application granted granted Critical
Publication of EP1814679B1 publication Critical patent/EP1814679B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B23/00Tube-rolling not restricted to methods provided for in only one of groups B21B17/00, B21B19/00, B21B21/00, e.g. combined processes planetary tube rolling, auxiliary arrangements, e.g. lubricating, special tube blanks, continuous casting combined with tube rolling
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B19/00Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
    • B21B19/02Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling Diescher mills, Stiefel disc piercers, Stiefel rotary piercers
    • B21B19/06Rolling hollow basic material, e.g. Assel mills
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B45/00Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/10Piercing billets
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J7/00Hammers; Forging machines with hammers or die jaws acting by impact
    • B21J7/02Special design or construction
    • B21J7/14Forging machines working with several hammers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B15/00Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B15/0035Forging or pressing devices as units
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B19/00Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
    • B21B19/02Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling Diescher mills, Stiefel disc piercers, Stiefel rotary piercers
    • B21B19/04Rolling basic material of solid, i.e. non-hollow, structure; Piercing, e.g. rotary piercing mills

Abstract

The invention relates to a seamless hot-finished steel tube (16), whereby a thick-walled hollow block (8) is formed from a block (1) heated to the moulding temperature in a first moulding process by means of stamping, which is then drawn at the same temperature in a second moulding step, by rolling with a change in diameter and wall thickness to give the pre-tube (bloom) and a finished tube is produced therefrom in a third moulding step by reduction rolling, characterised in that the second and third moulding steps defined by rolling are replaced by one moulding step in the form of a radial forging process, using an internal tool (11) inserted into the hollow block (8) and at least two forging cheeks of a forging machine (10), acting on the outer surface of the hollow block (8), whereby the hollow block (8) is alternately rotated and axially shifted during the idle stroke phase of the forging cheeks.

Description


  METHOD FOR PRODUCING A SEAMLESS STEEL TUBE AND A DEVICE FOR CARRYING OUT SAID METHOD

Description

The invention relates to a method for producing a seamless hot-finished steel tube according to the preamble of claim 1.

After the invention of the brothers Mannesmann from a heated block to produce a thick-walled hollow block pipe, there have been various proposals to stretch this hollow block pipe in the same heat in another hot working stage. Key words are the Kontiwalzverfahren, the impact banking, the plug rolling and the pilgrim step method (Stahlrohr Manual, 10th edition, Vulkan-Verlag Essen 1986, III.

   Manufacturing).

All these methods have their advantages for various dimensional ranges and materials, and there are also overlaps. For the average size range from 5 "to 18" the continuous and plug rolling method is used, for the size range up to 26 "the pilgrim step method is used.With thicker wall in the range of> 30 mm, the Kontiund stopper rolling process are less suitable, while the pilgrim step method, although no problems with the Wall thickness, but is slower in the production cycle .. The disadvantage of all these methods are the more or less long changeover times with dimensional change.

Characteristic of the production of seamless tubes from a heated block are the three steps punching - stretching - reduction rollers (H.

   Biller, The Rolling Seamless Pipes - Problems of Process Selection, Stahl and Eisen 106 (1986) No. 9, pages 431-437).

For some time, attempts have been made to save a step in order to reduce the manufacturing and installation costs. These efforts have been unsuccessful so far.

DE 1 906 961 A1 discloses a method for producing seamless tubes from hollow bodies produced in continuous casting. In this known method, the cast strand is divided and the respective section is pre-stretched with the aid of an inner tool and hot forging. Thereafter, the prestretched section is rolled out on a continuous rolling train to a pre-pipe (billet) and produced by subsequent stretch-reducing a finished tube.

   This proposed method is intended to be applied to the mass production of small diameter tubes from continuously cast hollow bodies. The proposal is to help overcome the problem of heavy use of the skew rolls in pre-stretching.

The object of the invention is to provide a manufacturing method for seamless hot-finished steel tubes, for the dimensional range of 5 "to 30" outer diameter and wall thicknesses> = 0.1 x outer diameter for the range 5 "to <16" outer diameter or> 40 mm wall thickness for the range 16 "to 30" outside diameter is also superior to the known methods for small batch sizes in terms of yield and productivity.

This object is achieved on the basis of the preamble in conjunction with the characterizing part of claim 1.

   Advantageous developments are the subject of dependent claims.

According to the teachings of the invention, the hitherto known second and third characterized by rolling forming (stretching rollers and Reduzierwalzen) is replaced by a forming step in the form of a radial forging process using an inserted into the Hohiblock inner tool and at least two acting on the lateral surface of the hollow block forging jaws a forging machine, wherein the hollow block clocked in the phase of the idle stroke of the forging jaws is rotated and moved axially.

   Depending on the type of control, the rotation and the axial feed of the hollow block can take place simultaneously or with a time offset.

The proposed method has the advantage that even thick-walled tubes can be produced optimally and the changeover times are low. Similar to the pilgrimage, the stretching process by forging still achieves a high elongation even with very thick-walled pipes. Thus, even with thick-walled pipes large pipe lengths can be displayed. Another advantage is the fact that in the majority of cases, the otherwise necessary downstream mass mill can be dispensed with, because after the drawing process by forging, the ready-to-use pipe produced in this way has finished tube quality.

   The proposed forging process is then particularly effective and qualitatively favorable, if instead of two, a total of four forging jaws are used, which act synchronously in a plane on the lateral surface of the hollow block. For better distribution, in particular the thermal load, it may be advantageous to move the inner tool during forging in the same direction or opposite to the axial feed.

For large degrees of stretch (> 4) and small wall thickness (<30 mm), it may be necessary, before forging in the hollow block a Trennund lubricant z. B. on Phosphatermoder graphite base. This avoids that it comes to a caking of the forged hollow block on the inner tool.

The first forming step may optionally be a hole punching or a punching by means of oblique rolls.

   After punching the soil is separated or pierced. The separation can be done by flame cutting or hot sawing. The hollow block produced by punching or by punching by means of oblique rolls can be forged directly or pre-stretched by a subsequent oblique rolling before it receives its finished pipe dimension by forging.

In this procedure, the separation or puncture of the soil can be omitted after the hole pressing. For the skew rolling, a two-roll or three-roll machine is used.

   Depending on the preliminary process, descaling of the outer and / or inner surface is advantageous.

The forged ready pipe is after the usual adjustment steps such as cutting to length, visual inspection, marking, etc. either immediately extraditable or is previously subjected to a heat treatment and / or non-destructive testing. The heat treatment may be normalizing or tempering. Depending on the straightness requirement, straightening is required. Likewise, with appropriate delivery requirements, a sanding or other suitable chip removal machining of the outer surface may be necessary to eliminate the caused by the forging process minor bumps.

The starting block to be used is either a section of a continuous casting rod, preferably a round continuous casting rod or a cast ingot (ingot).

   Depending on the hole process used, pre-forming of continuous casting by rolling or forging may be required for materials that are difficult to form. The heating of the output block is carried out in a known manner in a rotary hearth or in a walking beam furnace. At high weights, other heating furnaces, such. B. Tieföfen conceivable.

The device for carrying out the method is characterized by a radial forging machine which has a forging stand and at least two interchangeably arranged forging jaws. The rotational movement and the axial feed of the hollow block is carried out by a respective arranged on the inlet as on the outlet side manipulator.

   To minimize a possible straightening effort, it has proven to be advantageous to arrange a guide at least on the outlet side between the manipulator and forging. This is to ensure that the forged finished pipe leaving the forging stand is kept as far as possible in the center of the axle.

In principle, the forging process with straight forging jaws is possible, but the surface quality is significantly improved if each forging jaw on the side facing the workpiece seen in longitudinal section has a narrowing inlet section with an adjoining smoothing part. Seen in cross-section, the inlet region has a concave curvature, wherein the radius in the respective cross-sectional plane is always larger than the current radius of the hollow block in engagement.

   The greater curvature in the cross-sectional plane avoids a stapling effect. However, it is not necessary to hold a separate set of forged chucks for each inlet diameter of the hollow block, but rather a range of different inlet diameters can be covered with one set.

The inner diameter and the inner contour over the length of the forged finished tube is seen essentially by the nature of the inner tool - preferably in the form of a cylindrical dome - determined.

The use of a slightly conical dome increases the game between the forged finish pipe and the inner tool, so that the withdrawal of the finished pipe is facilitated by the inner tool. However, the conicity must be low, otherwise the wall thickness over the length would change in an inadmissible manner.

   The use of a stepped dome would be advantageous for making axles with thickened ends. Depending on the type of gradation and the production of multiple axes would be possible from a hollow block. The separation would take place afterwards.

Another application would be the production of threaded pipes in the form of an integral compound.

   Also, there would be the possibility of so-called socket pipes, the sleeve directly mitzuschmieden instead of producing them separately.

Based on two schematic representations, the inventive method will be explained in more detail.

It show

FIG. 1 shows the method according to the invention with a perforating unit (inclined roller),

Figure 2 shows the inventive method with a hole assembly (oblique roller) and a downstream pre-stretching unit (Elongator).

Figure 3 in longitudinal section an engaged hollow block

FIG. 4 shows a section in the direction A - A in FIG. 3

Figure 1 shows a schematic representation of the inventive method with only one hole assembly as the first forming step.

   By way of example, a block 1 divided off from a steel strand casting rod is placed in a rotary hearth furnace 2 and heated to the forming temperature, eg. B. 125O <0> C, heated. After heating and leaving the rotary hearth furnace 2, the heated block is fed via a roller table 3 a punching unit.

In this embodiment, the hole assembly is designed as a cross rolling mill 4 with two oblique rollers 5, 5 '. This includes an inner tool consisting of a piercer 6 and a support rod 7. Since the punching by means of oblique rollers is well known, it is unnecessary to take a closer look at it.

By punching a block 8 has been produced from the block 1, which passes through a transverse transport 9 to the forging machine 10.

   The subsequent stretching process by radial forging forms according to the invention the summary of the otherwise customary second and third forming step instead of the usual rolling, be it as a continuous, stopper or pilgrim step method with downstream reduction rolls. After retraction of an inner tool 11, preferably in the form of a cylindrical dome, the hollow block 8 is transported by a arranged on the inlet side manipulator 13 longitudinally through the forging stand 14 and simultaneously rotated. This rotation and the axial feed of the hollow block 8 is clocked in the phase of the idle stroke of the forging jaws either simultaneously or offset in time.

On the outlet side, a second manipulator 12 later takes over the finished tube 16 in order to be able to complete the forging process.

   The forging unit is shown here only schematically and has here not shown, the hollow block 8 encompassing forging jaws, which act on the lateral surface to extend by reducing both the outside diameter and the wall thickness of the hollow block 8.

After the stretching process by forging the hot-finished tube 16 is transported according to the arrow 15 in the finishing line to make it ready to ship there. The finishing usually comprises a cutting to length, a visual inspection, a marking and, depending on requirements, a previously performed heat treatment and / or a non-destructive testing.

   For reasons of space, the hot-finished tube 16 is shown shorter than would correspond to the extension.

By way of example, according to the workflow shown in Figure 1 from a block 1 with the dimension 406 mm round and a length of 2.8 m after punching a hollow block 8 of the dimension 390 a. D. x 123 mm Wd. produced with a length of 3.5 m. After forging, the hot-finished tube 16 has an outer diameter of 203 mm with a wall thickness of 50 mm and a length of 15 meters.

Figure 2 shows a variant of the method according to Figure 1, wherein the same reference numerals have been selected for the same parts. The first forming step is identical to the forming step illustrated in FIG. 1 until a hollow block 8 is produced.

   Before the stretching process by forging, the second forming step, however, a Vorstreckaggregat, a so-called Elongator 17, is arranged. Also, the Elongator is formed in this embodiment as a cross rolling mill with two inclined rollers 18, 18 'and an inner tool, consisting of a plug 19 which is connected to a support rod 20.

The hollow block 8 leaving the perforating unit is fed via a transverse transport 9 to the input side of the elongator 17. By the oblique rolling of the hollow block 8 is pre-stretched and reduced in the wall thickness hollow block 8 'produced. The diameter of the hollow block 8 'may be equal to, smaller or larger after pre-stretching.

Thereafter, the hollow block 8 'via a transverse transport 9' of the already explained in Figure 1 forging machine 10 is supplied.

   Since the following steps are identical, a repetition is unnecessary.

By way of example, according to the workflow shown in Figure 2 from a block 1 with the dimension 500 mm round and a length of 4 m after punching a hollow block 8 of the dimension 500 mm Ä. D. x 180 mm Wd. produced with a length of 4.3 m.

After passing through the Elongators is a hollow block 8 'with the dimensions 480 mm Ä. D. x 120 mm Wd. and 5.8 m in length.

After the drawing process by forging, the hot-finished tube 16 has an outer diameter of 339.7 mm, a wall thickness of 75 mm and a length of 12.6 m.

Figure 3 shows in a longitudinal section an engaged to be forged hollow block 8, which enters from the left in the forging machine and right as a ready-to-use pipe 16 leaves the forging machine.

   In the forging area on the outside in this embodiment, four forging jaws 21, 21 ', 21 ", 21'" and on the inside a cylindrical mandrel 22 together. The mandrel 22 is held in place by a support rod 23, but may alternatively be moved axially forward or backward during the forging process.

The rotary arrow 24 and the axial arrow 25 are intended to illustrate that during the idle stroke of the forging jaws 21 - 21 '"of the hollow block 8 is rotated and pushed further axially.

Each forging jaw 21-21 '"has in longitudinal section a predominantly conically shaped inlet section 26 and a subsequent smoothing section 27. The inlet section 26 can also be slightly convexly curved.

Seen in cross-section (Figure 4), all the forging jaws 21 - 21 '"have a concave curvature.

   As a rule, the curvature is a circular arc whose radius is greater than the current radius of the part to be forged. The movement arrows 28 shown in FIGS. 3 and 4 are intended to illustrate the radial stroke of the respective forging jaw 21 - 21 "'.

[0045] List of Reference Numerals

[0046]
 <EMI ID = 11.1>


Claims

claims
1. A method for producing a seamless hot-finished steel tube in which, starting from a heated to forming temperature block in a first forming step by punching a thick-walled hollow block is produced, which then in the same heat in a second forming step by rolling while changing the diameter and wall thickness to the front pipe (Luppe) stretched and produced in a third forming step by Reduzierwalzen a finished pipe is characterized in that the second and third characterized by rolling forming step is replaced by a forming step in the form of a radial forging process using an inserted into the hollow block inner tool and at least two the lateral surface of the hollow block acting forging jaws of a forging machine,
 wherein the hollow block clocked in the phase of the idle stroke of the forging jaws is rotated and axially displaced.
2. The method according to claim 1, characterized in that the rotation and the axial feed of the hollow block takes place simultaneously or offset in time.
3. The method according to claim 1 and 2, characterized in that four forging jaws are used, which act in a plane synchronously on the lateral surface of the hollow block.
4. Process according to claims 1 - 3, characterized in that the inner tool is during forging.
5. Process according to claims 1-3, characterized in that the inner tool is moved in the same direction as the axial feed during forging. 6. The method according to claims 1-3, characterized in that the inner tool is moved opposite to the axial feed during forging.
7. The method according to any one of claims 1-6, characterized in that on the inside of the hollow block before the start of the radial forging a Trennund lubricant is applied.
8. The method according to any one of claims 1-7, characterized in that the first forming step is a hole pressing.
9. The method according to claim 8, characterized in that is pierced after the hole pressing the soil.
10. The method according to claim 8, characterized in that after the hole pressing the soil is separated.
11. The method according to claims 8 - 10, characterized in that after the hole pressing and removing the bottom of the hollow block is descaled inside and outside.
12. The method according to claim 8, characterized in that after the hole pressing a pre-stretching by means of oblique rolls.
13. The method according to claim 12, characterized in that after the oblique rolling of the hollow block is descaled inside. 14. The method according to any one of claims 1-7, characterized in that the first forming step is a punching by means of oblique rolling.
15. The method according to claim 14, characterized in that after punching a pre-stretching by means of oblique rolls.
16. The method according to claims 14 and 15, characterized in that the hollow block produced is descaled inside.
17. The method according to any one of claims 1-16, characterized in that the finished tube is subjected to a heat treatment.
18. The method according to any one of claims 1-17, characterized in that the finished tube is directed.
19. The method according to any one of claims 1-18, characterized in that the outer surface of the finished pipe is machined.
20. The method according to claim 19, characterized in that the processing is a grinding.
21. A device for carrying out the method according to claim 1 with a radial forging machine consisting of a forging and at least two interchangeable arranged Schmiedebacken and a manipulator and a projecting into the forging rack axially movable mandrel, characterized in that on the inlet and on the outlet side each a manipulator (12, 13) is arranged and at least the outlet side has a guide. 22. Device according to claim 21, characterized in that the guide between the manipulator (12) and forging stand (14) is arranged.
23. Device according to claim 21 and 22, characterized in that viewed in longitudinal section each forging jaw (21 - 21 "') on the workpiece side facing a narrowing inlet section (26) with an adjoining flat smoothing part (27) and in cross section seen the forging jamb (21 - 21 '") has a concave curvature, wherein the radius in the respective cross-sectional plane is always greater than the current radius of the engaged hollow block (8, 8').
24. Device according to one of claims 21 - 23, characterized in that the mandrel (22) is cylindrical.
25. Device according to one of claims 21 - 23, characterized in that the mandrel is conical.
26. Device according to one of claims 21 - 23, characterized in that the mandrel is stepped
27. Device according to one of claims 21 - 26, characterized in that the insertion side has a guide.
EP05803680A 2004-10-25 2005-10-25 Method for production of a seamless hot-finished steel tube Active EP1814679B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE102004052406 2004-10-25
DE102005052178A DE102005052178B4 (en) 2004-10-25 2005-10-24 Method for producing a seamless hot-worked steel tube
PCT/DE2005/001944 WO2006045301A1 (en) 2004-10-25 2005-10-25 Method for production of a seamless hot-finished steel tube and device for carrying out said method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL05803680T PL1814679T3 (en) 2004-10-25 2005-10-25 Method for production of a seamless hot-finished steel tube

Publications (2)

Publication Number Publication Date
EP1814679A1 true EP1814679A1 (en) 2007-08-08
EP1814679B1 EP1814679B1 (en) 2009-02-18

Family

ID=36129190

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05803680A Active EP1814679B1 (en) 2004-10-25 2005-10-25 Method for production of a seamless hot-finished steel tube

Country Status (16)

Country Link
US (1) US8166792B2 (en)
EP (1) EP1814679B1 (en)
JP (1) JP4633122B2 (en)
KR (1) KR20070084387A (en)
AT (1) AT422978T (en)
AU (1) AU2005299151B2 (en)
BR (1) BRPI0516769B1 (en)
CA (1) CA2584461C (en)
DE (2) DE102005052178B4 (en)
EA (1) EA009851B1 (en)
ES (1) ES2321121T3 (en)
HR (1) HRP20090227T1 (en)
MX (1) MX2007004965A (en)
PL (1) PL1814679T3 (en)
RS (1) RS50967B (en)
WO (1) WO2006045301A1 (en)

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WO2017182361A1 (en) 2016-04-18 2017-10-26 Metalvalue Sas Seamless metal tubes

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DE102011109071A1 (en) 2011-07-30 2013-01-31 Sms Meer Gmbh Pipe Forging Process with Urformed Hollow Block
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WO2006045301A1 (en) 2006-05-04
US8166792B2 (en) 2012-05-01
BRPI0516769B1 (en) 2018-10-30
EA009851B1 (en) 2008-04-28
BRPI0516769A (en) 2008-09-23
RS50967B (en) 2010-10-31
EA200700945A1 (en) 2007-10-26
JP4633122B2 (en) 2011-02-23
DE102005052178B4 (en) 2008-06-19
AU2005299151B2 (en) 2011-08-25
DE502005006668D1 (en) 2009-04-02
ES2321121T3 (en) 2009-06-02
US20090044883A1 (en) 2009-02-19
AU2005299151A1 (en) 2006-05-04
KR20070084387A (en) 2007-08-24
DE102005052178A1 (en) 2006-04-27
JP2008517766A (en) 2008-05-29
EP1814679B1 (en) 2009-02-18
PL1814679T3 (en) 2009-07-31
CA2584461A1 (en) 2006-05-04
MX2007004965A (en) 2007-06-14
HRP20090227T1 (en) 2009-05-31
AT422978T (en) 2009-03-15

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