EP1347849B1 - Procede de fluotournage et dispositif de fluotournage - Google Patents

Procede de fluotournage et dispositif de fluotournage Download PDF

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Publication number
EP1347849B1
EP1347849B1 EP01272628A EP01272628A EP1347849B1 EP 1347849 B1 EP1347849 B1 EP 1347849B1 EP 01272628 A EP01272628 A EP 01272628A EP 01272628 A EP01272628 A EP 01272628A EP 1347849 B1 EP1347849 B1 EP 1347849B1
Authority
EP
European Patent Office
Prior art keywords
workpiece
flow
blank
forming
area
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP01272628A
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German (de)
English (en)
Other versions
EP1347849A1 (fr
Inventor
Günter POLLKÖTTER
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.)
Leifeld Metal Spinning GmbH
Original Assignee
Leifeld Metal Spinning 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 claimed from DE10115815A external-priority patent/DE10115815C2/de
Application filed by Leifeld Metal Spinning GmbH filed Critical Leifeld Metal Spinning GmbH
Publication of EP1347849A1 publication Critical patent/EP1347849A1/fr
Application granted granted Critical
Publication of EP1347849B1 publication Critical patent/EP1347849B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/14—Spinning
    • B21D22/18—Spinning using tools guided to produce the required profile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/16—Making tubes with varying diameter in longitudinal direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H1/00—Making articles shaped as bodies of revolution
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49764—Method of mechanical manufacture with testing or indicating
    • Y10T29/49771—Quantitative measuring or gauging

Definitions

  • the invention relates to a flow-forming method according to The preamble of claim 1 and a device for Pressure rollers according to the preamble of claim 10.
  • a generic flow-forming process is a blank arranged on a rolling mandrel of a flow-forming machine, the blank relative to at least one spinning roller in Rotation offset, the at least one spinning roller relative delivered to the blank and the blank through the Flow-forming roller axially elongated and press-rolled to a workpiece.
  • a generic flow-forming process is known from DE-A-34 02 301 known. In this method can on the spinning roller radial, axial and tangential force components be measured. The measured values are used for Control of the flow-forming process.
  • a generic device for spin forming has a Rolling mandrel for picking up a workpiece, at least one Flow-forming roller, a drive device for generating a Rotation between the workpiece and the spinning roller and a control device for controlling a delivery relatively between Rolling mandrel and spinning roll on.
  • a control device for controlling a delivery relatively between Rolling mandrel and spinning roll on.
  • Such methods and apparatus for spin forming are and are known, for example, for cylinder-spinning used by rotationally symmetrical precision hollow parts.
  • wall thickness tolerances can be achieved of a few hundredths of a millimeter.
  • inserted cylindrical blanks point in usually several tenths of a millimeter thickness tolerances. Due to the individually different thickness of the blanks thus result due to the volume constancy of the reshaped Material considerable geometry, in particular Length differences, on the finished part. There will be more Machining steps, in particular machining finishing, required. This increases significantly the machine, personnel, time and material costs and thus the costs for the finished precision parts.
  • the object of the invention is to provide a method and a device with which workpieces can be manufactured with particularly high precision.
  • This task is performed by a procedure with the characteristics of claim 1 and by a device with the features of claim 10 solved.
  • a method of the type indicated above is according to the invention further developed in that to compensate for dimensional fluctuations the blank at least one compensation area in the Workpiece is formed that before and / or during the Drückwalzens with a measuring device geometric data of the blank or the workpiece are determined that the Achieving a desired final geometry of the workpiece geometric parameters of the at least one compensation area depending on the determined geometric data be calculated individually and that by means of a control device the delivery of the spinning roller accordingly the calculated geometric parameters of the compensation area is controlled so that regardless of dimensional variations of the blank a workpiece with the desired final geometry is formed.
  • each blank depending on the actual dimensional fluctuation individually made.
  • the invention before and / or during spin-rolling geometric data of the blank or the workpiece determined. Subsequently, based on this geometric Data an individual compensation area in the Workpiece incorporated. It can thus be the significant advantage be achieved that, regardless of any present Dimensional variations of the blank, the workpiece always has a desired end geometry.
  • the at least one compensation area in one for a functionality of the workpiece uncritical area of the workpiece incorporated is the at least one compensation area in one for a functionality of the workpiece uncritical area of the workpiece incorporated.
  • At least one axial length of the blank or of the workpiece in particular be determined several times.
  • the axial length depends sensitive of any dimensional variations of the blank so that due to this size the geometric Parameters of the compensation area are determined very accurately can.
  • It can also be a geometric data but also a diameter and / or a wall thickness of the blank or of the workpiece be determined. This can improve the accuracy of the determination the compensation area parameter is increased.
  • the determined temperature and / or the determined pressure supplied to the computer device go into the calculation of the geometric parameters of the compensation area.
  • the compensation area becomes a cylindrical area and / or as at least one bevelled area, shaped.
  • the dimensional variations of the blanks are particularly large, can be provided that several compensation area in the Workpiece to be incorporated. This can also be beneficial if desired, that is the variation of geometric Parameters of a compensation area of workpiece to workpiece should not be too big.
  • the inventive method can as synchronous and also be carried out as a mating method.
  • a device of the type specified above is according to the invention further developed by the fact that at least one measuring device for determining geometric data of the workpiece is provided that the measuring device with a Computer device is connected to the calculation of geometric parameters of a compensation range is, which for individual compensation ofhyroidschwankept of the blank incorporated into the workpiece is, and that by means of the control device, the delivery the spinning roller is controllable, so that the compensation area of the workpiece as a function of the Computer device individually calculated geometric Parameter is formed.
  • the device also referred to as a flow-forming machine can be operated web and / or pressure controlled become.
  • NC technology pioneers can be found Flow-forming operations as well as the exact positioning realize the spinning rollers in the longitudinal and transverse axis.
  • the measuring device has at least one Displacement sensor on.
  • This may be an optical, acoustic and / or a sensor for determining the electrical Conduct conductivity.
  • Device are provided a plurality of displacement sensors, which in particular axially spaced from each other. This advantageously allows a multiple determination, for example, an axial length of the workpiece, in the course of the flow-forming process.
  • the geometric parameter of the compensation area can but also be provided that the measuring device a Sensor for determining a diameter of the workpiece and / or a wall thickness of the workpiece.
  • gauges or sensors can be used to determine be provided further physical quantities, so that the Workpiece more accurately characterized and the manufacturing process carried out under even better defined conditions can be.
  • a pressure sensor may be provided.
  • Figure 1 shows an axial cross-sectional view of a tubular Blank 12 with an axial length Lo, an inner diameter di, an outer diameter there and with a Wall thickness So.
  • the dimensions indicated in the figures are to be understood in millimeters.
  • the wall thickness So of the blank 12 has a tolerance of +/- 0.12 mm.
  • Figure 2 shows in an axial cross-sectional view of a a blank 12 rolled in an axial direction Z.
  • Workpiece 14 The wall thickness So of the blank used in this case 12 was at the lower limit of the tolerance range FIG. 1
  • Figures 3 and 4 are in axial cross-sectional views further workpieces 14 shown in which the Wall thickness So the blanks used 12 in the middle or at the upper edge of the tolerance range of Figure 1 were.
  • Figures 2 to 4 can be taken very clearly, that individually present470schwankept the blanks 12, in the case shown here, the fluctuation of the wall thickness So, very strong on the geometry, about the axial Length L1 of the rolled workpieces 14 impact.
  • the axial length L1 of the Workpiece 14 of Figure 2 compared to the workpiece Figure 4 by almost 8%.
  • Figures 5 to 7 are in axial cross-sectional views Workpieces 14 shown in which in a for a functionality of the workpiece 14 non-critical area according to the invention compensation areas 26 individually were incorporated.
  • the compensation regions 26 each have a cylindrical Area A as well as a run-out slope X1, X2, X3 trained beveled area on. All workpieces 14 of Figures 5 to 7 have an identical design cylindrical region L between that in Figures 5 to 7 right end of the workpiece 14 and the compensation area 26 on. Furthermore, in the workpieces 14 of Figures 5 to 7 is a cylindrical area A with an identical axial Length and an identical wall thickness S2 formed.
  • each used Blanks 12 To compensate for dimensional variations of each used Blanks 12 are the outlet slopes X1, X2, X3, which starting from point Y to the cylindrical area A connect, individually trained.
  • the blank 12 used has the workpiece 14 of Figure 5 a with respect to the axial extent of Outlet slope X2 from Figure 6 shortened outlet slope X1 on.
  • Analog is the outlet slope X3 of the workpiece 14, for which a blank with a below average Wall Thickness So used was extended compared to X2.
  • compensation areas 26, which are also referred to as tolerance compensation ranges can, in the manufacture or construction of workpieces 14 or production parts considered. In these balancing areas 26 tolerance differences are accordingly their effect on the final production length L1 Considering measuring during the forming process.
  • the volume equation used is the volume constancy of the formed material as well as the constancy of the Inside diameter of the workpiece.
  • FIGS. 8-10 Further examples of customized compensation areas 26 are shown in FIGS. 8-10.
  • the workpieces 14 each have identical ones cylindrical areas L on, each one individually connect trained compensation areas 26.
  • the compensation areas 26 in turn each consist of one cylindrical area A1, A2, A3 and a itself after point Y subsequent outlet slopes X1, X2 and X3.
  • counter-rotating spin forming is a blank 12, in which it may be a rifle or pipe section, pushed over a rolling mandrel 16 to a clamping point and there detected by a driving ring 42, with hardened teeth can be provided.
  • An axial force of one or more spinning rollers 18 presses the blank 12 on a toothed segment and offset him thereby in a rotary motion.
  • the material flows in the forming under the flow-forming rollers 18 in the direction of the free rolling mandrel and beyond that into a free one Working space of the machine. Longitudinal feed and flow direction are thus opposing each other.
  • FIGS 11, 12 and 13 are parts of an inventive Device as well as in partial cross-sectional views blanks 12 and workpieces 14 at different stages of the invention Process illustrated.
  • the blanks 12 of Figures 11, 12 and 13 each have different Wall thicknesses up.
  • the partial cross-sectional views of method step 1 show each one angeordenten on a rolling mandrel 16 blank 12, which comes with a driving ring 42 into abutment. It Then, the rolling mandrel 16 is driven in rotation and several Flow-forming rollers 18, one of which is exemplified is radially delivered to the blank 12.
  • the axial feed takes place by moving the rolling mandrel in the Z direction.
  • a plurality of displacement sensors 46, 48, 50, 52 are provided. These displacement sensors 46, 48, 50, 52, in which there in particular may be optical sensors are axially spaced from each other at positions Z1, Z2, Z3, Z4 arranged.
  • the geometric parameters of Compensation area 26 individually calculated and the flow-forming rollers 18 are calculated according to the calculated parameters axially and radially delivered to the workpiece 14.
  • step 1 the flow-forming roller 18 in a Distance of 32.3 mm from the right opening diameter attached.
  • step 2 a first run-up slope of the area 28 trained.
  • step 3 the spinning roller 18 is in a cylindrical portion of the area 28, wherein at a distance of 63.87 mm from the spinning roller 18 at the position Z1 the displacement sensor 46 is arranged as the first measuring point. Subsequently, a discharge slope of the area 28 in the Formed workpiece 14.
  • step 4 is a discharge ramp of 8.18 mm in length finished molded.
  • step 5 the workpiece 14 has the reached at the position Z2 arranged second transducer 48. At a distance of 98.7 mm begins a first inlet slope a compensation area 26 except for a wall thickness cross section of 1.92 mm.
  • step 6 the workpiece 14 has the third position transducer 50 is reached at the position Z3, which is at a distance of 167.9 mm from the flow-forming roller 18 is located. It is now measured by a calculator based on the measured Track in Z-direction and taking into account the measured data of the transducer 50 at position Z3 via the volume equation the parameters for an outlet slope of the Compensation area 26 determined to a total workpiece length of 204.5 mm. At the same time, from the determined data position Z4 a fourth, variable positionable position transducer 52 set.
  • step 7 is on reaching the fourth transducer 52 terminated at the position Z4 of the flow-forming and the Workpiece 14 has reached its desired length of 204.5 mm.
  • Figures 12 and 13 is the inventive method in an analogous manner as in Figure 11 for blanks 12 with represented different Teschwankept.
  • the process steps Figures 1 to 8 of Figures 12 and 13 correspond to those of Figure 11, which is why a detailed description is omitted here.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Forging (AREA)

Claims (15)

  1. Procédé de fluotournage, dans lequel
    une ébauche (12) est placée sur un mandrin de tournage (16) d'une machine de fluo tournage,
    l'ébauche (12) est mise en rotation relativement par au moins un rouleau de fluo tournage (18),
    le rouleau de fluotournage (18) au nombre d'au moins un est approché relativement de l'ébauche (12), et
    l'ébauche (12) est coupée axialement en longueur par le rouleau de fluotournage (18) et est fluotournée en une pièce (14),
    caractérisé
    en ce que pour compenser des fluctuations de dimension de l'ébauche (12), au moins une zone de compensation (26) est formée dans la pièce (14),
    en ce qu 'avant et/ou pendant le fluotournage, des données géométriques de l'ébauche (12) ou bien de la pièce (14) sont relevées avec un dispositif de mesure,
    en ce que pour obtenir une géométrie finale souhaitée de la pièce (14), les paramètres géométriques de la zone de compensation (26) au nombre d'au moins une sont calculés individuellement en fonction des données géométriques relevées, et
    en ce qu 'au moyen d'un dispositif de commande, l'approche du rouleau de fluo tournage (18) est commandée suivant les paramètres géométriques calculés de la zone de compensation (26), de telle sorte qu'indépendamment de fluctuations de dimensions de l'ébauche (12), une pièce (14) présentant la géométrie finale souhaitée est formée.
  2. Procédé selon la revendication 1,
    caractérisé en ce qu'
    au moins une zone de compensation (26) est ménagée dans une zone de la pièce (14) non critique pour la fonction de la pièce (14).
  3. Procédé selon l'une quelconque des revendications 1 ou 2,
    caractérisé en ce que,
    comme données géométriques, on relève au moins une longueur axiale (L0 ; L1) de l'ébauche (12) ou bien de la pièce (14), en particulier plusieurs fois.
  4. Procédé selon l'une quelconque des revendications 1 à 3,
    caractérisé en ce que,
    comme données géométriques, on relève un diamètre (da) et/ou une épaisseur (S0; S1) de paroi de l'ébauche (12) ou bien de la pièce (14).
  5. Procédé selon l'une quelconque des revendications 1 à 4,
    caractérisé en ce qu'
    avant, pendant et/ou après le fluotournage, on relève une température de la pièce (14).
  6. Procédé selon l'une quelconque des revendications 1 à 5,
    caractérisé en ce que ,
    pendant le fluotournage, on relève une pression dans la pièce (14), en particulier dans la direction axiale (Z).
  7. Procédé selon l'une quelconque des revendications 5 ou 6,
    caractérisé en ce que
    la température relevée et/ou la pression relevée est envoyée au dispositif de calcul et entre dans le calcul des paramètres géométriques de la zone de compensation (26).
  8. Procédé selon l'une quelconque des revendications 1 à 7,
    caractérisé en ce que
    la zone de compensation (26) est formée d'une zone cylindrique (A ; A1 ; A2 ; A3) et/ou d'au moins une zone biseautée (X1 ; X2 ; X3).
  9. Procédé selon l'une quelconque des revendications 1 à 8,
    caractérisé en ce que
    plusieurs zones de compensation (26) sont ménagées dans la pièce (14).
  10. Dispositif de fluotournage avec
    un mandrin de tournage (16) destiné à recevoir une pièce (14),
    au moins un rouleau de fluotournage (18),
    un dispositif d'entraínement destiné à produire une rotation entre la pièce (14) et le rouleau de fluotournage (18), et
    un dispositif de commande destiné à commander une approche relative entre le mandrin de tournage (16) et le rouleau de fluotournage (18),
    caractérisé
    en ce qu'au moins un dispositif de mesure est prévu pour relever des données géo métriques de la pièce (14),
    en ce que le dispositif de mesure est relié à un dispositif de calcul qui est conçu pour calculer des paramètres géométriques d'une zone de compensation (26), qui est ménagée dans la pièce (14) pour compenser individuellement des fluctuations de dimension de l'ébauche (12), et
    en ce qu 'au moyen du dispositif de commande, l'approche du rouleau de fluotour nage (18) peut être commandée, de telle sorte que la zone de compensation (26) de la pièce (14) est réalisée en fonction des paramètres géométriques calculés indivi duellement par le dispositif de calcul.
  11. Dispositif selon la revendication 10,
    caractérisé en ce que
    le dispositif de mesure présente au moins un capteur de déplacement (46, 48, 50, 52).
  12. Dispositif selon la revendication 11,
    caractérisé en ce que
    plusieurs capteurs de déplacement (46, 48, 50, 52) sont prévus, qui sont en particulier espacés axialement les uns des autres.
  13. Dispositif selon l'une quelconque des revendications 10 à 12,
    caractérisé en ce que
    le dispositif de mesure présente un capteur pour relever un diamètre de la pièce (14) et/ou une épaisseur de paroi (S1) de la pièce (14).
  14. Dispositif selon l'une quelconque des revendications 10 à 13,
    caractérisé en ce qu'
    un capteur de température est prévu pour relever une température de la pièce (14).
  15. Dispositif selon l'une quelconque des revendications 10 à 14,
    caractérisé en ce qu'
    un capteur de pression est prévu pour relever une pression dans la pièce (14), en parti culier dans une direction axiale (Z).
EP01272628A 2001-01-04 2001-11-08 Procede de fluotournage et dispositif de fluotournage Expired - Lifetime EP1347849B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10100200 2001-01-04
DE10100200 2001-01-04
DE10115815A DE10115815C2 (de) 2001-01-04 2001-03-30 Drückwalzverfahren und Vorrichtung zum Drückwalzen
DE10115815 2001-03-30
PCT/EP2001/012946 WO2002053307A1 (fr) 2001-01-04 2001-11-08 Procede de fluotournage et dispositif de fluotournage

Publications (2)

Publication Number Publication Date
EP1347849A1 EP1347849A1 (fr) 2003-10-01
EP1347849B1 true EP1347849B1 (fr) 2005-05-25

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP01272628A Expired - Lifetime EP1347849B1 (fr) 2001-01-04 2001-11-08 Procede de fluotournage et dispositif de fluotournage

Country Status (5)

Country Link
US (1) US6817219B2 (fr)
EP (1) EP1347849B1 (fr)
JP (1) JP4055850B2 (fr)
ES (1) ES2243401T3 (fr)
WO (1) WO2002053307A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6857359B2 (en) * 2001-07-12 2005-02-22 Fuji Photo Film Co., Ltd. Devices relating to rolled product
WO2005040205A1 (fr) * 2003-10-28 2005-05-06 Protemix Discovery Limited Peptides avec action contre l'obesite et autre utilisations apparentees
NL1024697C2 (nl) 2003-11-04 2005-05-09 Johan Massee Werkwijze en forceermachine voor het vervormen van een werkstuk.
NL1026796C2 (nl) 2004-08-06 2006-02-07 Fontijne Grotnes B V Werkwijze en inrichting voor het door middel van koude vervorming vervaardigen van een velgring.
US20080096039A1 (en) * 2006-10-19 2008-04-24 Gm Global Technology Operations, Inc. Method of making precursor hollow castings for tube manufacture
JP2009160627A (ja) * 2008-01-09 2009-07-23 Nippon Spindle Mfg Co Ltd 塑性加工方法及びその装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE152491C (fr)
GB1378508A (en) * 1971-10-07 1974-12-27 Formflo Ltd Diametral control of rolled rings
GB1475777A (en) * 1974-07-24 1977-06-10 Formflo Ltd Rolling operations
DD152491A1 (de) * 1980-08-08 1981-12-02 Klaus Drews Verfahren zur masseabhaengigen spalteinstellung bei konstanter werkstuecklaenge
DE3402301A1 (de) 1984-01-24 1985-08-01 Fritz Prof. Dr.-Ing. 5450 Neuwied Fischer Vorrichtung und verfahren zum drueckwalzen
US5323630A (en) * 1993-02-19 1994-06-28 Leifeld Gmbh & Co. Flow-roller machine
US5699690A (en) * 1995-06-19 1997-12-23 Sumitomo Metal Industries, Ltd. Method and apparatus for manufacturing hollow steel bars
NL1000851C2 (nl) * 1995-07-20 1997-01-21 Massee Johan Werkwijze en inrichting voor het forceren van een metaalplaat.

Also Published As

Publication number Publication date
WO2002053307A1 (fr) 2002-07-11
ES2243401T3 (es) 2005-12-01
EP1347849A1 (fr) 2003-10-01
JP2004516940A (ja) 2004-06-10
US6817219B2 (en) 2004-11-16
JP4055850B2 (ja) 2008-03-05
US20040034980A1 (en) 2004-02-26

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