EP0908246B1 - Dispositif de changement des cylindres de travail et/ou des cylindres intermédiaires d'une cage de laminoir, et ratelier de stockage pour un tel dispositif - Google Patents

Dispositif de changement des cylindres de travail et/ou des cylindres intermédiaires d'une cage de laminoir, et ratelier de stockage pour un tel dispositif Download PDF

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Publication number
EP0908246B1
EP0908246B1 EP98402518A EP98402518A EP0908246B1 EP 0908246 B1 EP0908246 B1 EP 0908246B1 EP 98402518 A EP98402518 A EP 98402518A EP 98402518 A EP98402518 A EP 98402518A EP 0908246 B1 EP0908246 B1 EP 0908246B1
Authority
EP
European Patent Office
Prior art keywords
rolls
roll
working
stand
cylinders
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
EP98402518A
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German (de)
English (en)
French (fr)
Other versions
EP0908246A1 (fr
Inventor
Alain Lecrivain
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.)
Clecim SAS
Original Assignee
VAI Clecim SA
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 VAI Clecim SA filed Critical VAI Clecim SA
Publication of EP0908246A1 publication Critical patent/EP0908246A1/fr
Application granted granted Critical
Publication of EP0908246B1 publication Critical patent/EP0908246B1/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
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/08—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts
    • B21B31/10—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts by horizontally displacing, i.e. horizontal roll changing
    • B21B31/103—Manipulators or carriages therefor
    • 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
    • B21B13/14—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories having counter-pressure devices acting on rolls to inhibit deflection of same under load; Back-up rolls
    • B21B13/145—Lateral support devices for rolls acting mainly in a direction parallel to the movement of the product
    • 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
    • B21B2013/003—Inactive rolling stands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
    • B21B2013/028—Sixto, six-high stands

Definitions

  • the lower working cylinder rests on the cylinder lower middle which is associated with means adjusting its level in relation to the cage.
  • said level adjustment means are first adjusted to place the cylinder work below its dismantling level for the engagement of the lower housing of the organ of support on the trunnion of said working cylinder lower and to be determined by lowering the cylinder lower intermediate, taking charge of lower working cylinder by the support member.
  • Support cylinders 2, 2 'and cylinders intermediaries 3, 3 ′ are fitted, at each end, a chock made up, in the usual way, of a housing in which a centering bearing is mounted a pin at the axial end corresponding cylinder.
  • each chock 6, 6'located on the operator side is equipped with a body attachment 10 allowing handling.
  • the parts 8a of the rails 8, 8 'corresponding to the two uprights of cage 1 can be retracted so as not to exceed in protrusion on the guide faces, during rolling. These retractable parts are put back in place only after opening the cylinders for allow the withdrawal of these.
  • the invention applies especially to a Z-High type rolling mill in which each cylinder intermediary 3 is associated, as shown on the Figure 4, with two sets 13 of lateral support placed on each side of working cylinder 4 and extending over its entire length.
  • each 4, 4 'working cylinder can rest, via its pins 11 on removable supports 62, 62 ', which have not been shown schematically in Figure 1 and which consist of mounted eclipsable forks, for example, on hydraulic blocks and coming place under the pins 11 of the working cylinder to support it, said forks being able to be laterally cleared to release the cylinder from work when it comes into contact with the product.
  • the median plane of the industrial truck 18 is centered on the clamping plane P 'of the cage rolling mill.
  • On the side carriage 25 can be placed at at least two chassis 29 each equipped with a device 28 cylinder extractor, displaceable in translation on the chassis 29, in a direction parallel to the axes of cylinders 3 and 4.
  • the two devices extractors 28 therefore move with the carriage lateral 25, perpendicular to the axes of the cylinders, to be placed, in turn, in the alignment of the cage.
  • Figures 2 and 3 3 show respectively, in cross section, two and three installations extractor devices.
  • Each chassis 29 associated with a device extractor 28 is limited by two load-bearing walls which are provided at their upper level and in the lower part, two pairs of rails 9, 9 'coming respectively in the extension of the pairs of fixed rails 8 and 8 'when the extractor device 28 concerned has its vertical mediator plan confused with the clamping plane P 'of the cage 1.
  • each chassis 29 can come to center, by movement of the carriage 25, on the median plane P 'of the cage, the two pairs of rails 9, 9 'being connected to the two pairs of fixed rails 8, 8 ′ by the sections 23, 23 'to form two continuous raceways.
  • Each chassis 29 thus forms a reception box or cylinder storage.
  • each receiving box may include, to their ends facing cage 1, each one projection 30 in the shape of a trapezoidal nose, formed substantially halfway up, so as to engage in a notch 31 of corresponding shape provided in the corresponding side wall of the end 22 of the carriage 18.
  • Each extractor device 28 is guided on the auxiliary carriage 25, via two guide rails 32, which are fixed substantially at mid-height load-bearing walls 29 and can be extended on the projecting part 30, beyond the rails 9, 9 'so as to penetrate, at the level of the rails 23, 23 ', between the attachment members 10, 10' of the intermediate cylinders 3, 3 ', in position close to the industrial truck 18.
  • the displacement on the rails 32 of the device extractor 28 is controlled by a rack and pinion system driven by an electric gear motor 33 mounted on the extractor device 28 and which controls the rotation of a pinion 33a meshing on a rack 33b fixed on the carriage 25, along the rails 32 (Fig. 5).
  • the device extractor is provided with a support member 34 arranged so that each work cylinder can be gripped by the pin on the operator side, holding the working cylinder cantilevered in a housing 35 of the support member.
  • the levels of replacement of intermediate cylinders are defined by rails 8, 8 'and the replacement levels of working cylinders are determined by the positions support members 62, 62 ', the axes of the cylinders being removed in this position from a constant distance. So just plan, if if necessary, a height adjustment of the solid part 34 relative to the extraction carriage 28 to align, with precision the axes of the housings 35 on the axes working cylinders.
  • This setting can be done in advance on all devices extraction 28 associated with the cage 1, so that, after installation of an extraction device in the median plane of the cage, the housings 35 engage directly in the pins 11 of the cylinders of work 4, 4 'placed in the disassembly position.
  • the relative reduction thus achieved is simply equal to the clearance left between the housings 35 and the pins 11 to allow threading easy of these.
  • the threading length, equal to the depth of the housing 35, must be simply sufficient to allow overhang of the cylinder without risk of matting of the parts support.
  • the support member 34 could have, for each working cylinder, a clamping member comprising two pairs of jaws, respectively lower and upper, maintained open to thread on pin 11 of each working cylinder 4, 4 'by axial displacement of the extraction device 28, each pair of jaws being centered on an axis placed in alignment with the axis of the working cylinder, at the disassembly level of it.
  • each extractor device 28 is equipped so that it can be removed, according to requirements, i.e. the two working cylinders 4, 4 ', either the two inserts each comprising a cylinder intermediate with the associated working cylinder and its two lateral support assemblies.
  • the lateral carriage 25 on which the device is mounted extraction 28 is arranged so that the latter can enter the space between chocks 6, 6 'of the intermediate cylinders 3, 3', in a position for which the rails 8, 8 'of the cage 1 are aligned with the rails 23, 23 'of the carriage handling 18 and the rails 9, 9 'of the carriage lateral 29.
  • the extraction device 28 which moves on the rails 32 is provided with removable gripping members who, if necessary, can commit to the attachment means 10, 10 'of the chocks 6, 6' of the intermediate cylinders 3, 3 'to remove the assembly of each insert with the working cylinder corresponding.
  • the extractor device 28 is provided, in the upper part and in the lower part of vertical attachment fingers 37, directed in opposite directions.
  • These fingers 37 are movable vertically and are controlled, for example, by a electric or hydraulic cylinder 38, of horizontal axis, connected to fingers 37 by a system of links for control their vertical movement.
  • a system controlled by cam we could also use a system controlled by cam.
  • each intermediate cylinder carry the sets lateral supports associated with the working cylinders corresponding.
  • the working cylinder 4 is carried by the member support 34 while the intermediate cylinder 3 as well as the lateral support assemblies are worn by the chocks 6, which via the rollers 7, roll successively on the rails 8, 23, 9 until the entire insert is placed on the side carriage 25.
  • the housings 35 are maintained, by sliding of the support member 34, at a constant level relative to the rail levels 8, 8 ', 9, 9', the translation operations can be done safely, without risk interference between the cylinders.
  • the handling trolley 18 is provided with a lateral carriage 25 carrying at least two reception boxes 29 each provided with a device extraction.
  • one boxes 29a is empty and can be placed in advance in line with the cage. After withdrawal of worn cylinders in the empty box 29a, the carriage 25 is move laterally to center in the midplane P 'of the cage, the neighboring box 29b in which have replacement cylinders have been placed in advance which can thus be introduced immediately into cage 1.
  • the device according to the invention also has the advantage of allowing selective replacement, i.e. working cylinders alone, or of the whole of each insert, respectively higher or lower.
  • the first box 29a is completely empty for allow exit, as required, either working cylinders 4, 4 'alone, i.e. all of each insert comprising an intermediate cylinder 3, the lateral support assemblies and the cylinder job.
  • working cylinders 4, 4 'alone i.e. all of each insert comprising an intermediate cylinder 3, the lateral support assemblies and the cylinder job.
  • the other cylinder, for example, the lower cylinder 4 ' is still supported by its forks support 62 'and therefore remains inside the cage 1 when the extraction device 28 is moved aside.
  • fingers 37 can be controlled selectively so as to determine the withdrawal, with the extraction device 28, from one or other of the intermediate cylinders associated with support assemblies side.
  • the industrial truck 18 then brings the extraction device in maintenance position for replacing the cylinder.
  • the second box 29b of the carriage 25 is equipped in advance of two complete inserts, respectively upper and lower, each comprising a working cylinder, an intermediate cylinder and its support assemblies side.
  • each box of reception is equipped with an extraction device, working cylinders and cylinders intermediates are worn separately, respectively by the support member 34 and by the rails 9, 9 'of the chassis 29b.
  • the lateral carriage 25 is provided with three extractor devices 28; in that case two extractor devices are loaded with cylinders new, the other being empty to release a first game worn cylinders in the cage. It is then possible make two consecutive cylinder changes without having to bring back the whole of the main carriage and side carriage 25 in the workshop of rectification 20.
  • the device is not shown on figures only schematically but it involves all the auxiliary organs necessary for operation of the carriages 18, 25 and of the device extraction 28, in particular for winding and the unwinding of the electric cables and / or hydraulic lines connected to the different moving parts.
  • the movements of the carriages can be ordered in various ways.
  • the gear motor group 33 which moves along a rack 33b could be replaced by a push chain powered by a motor mounted directly on the carriage 25.
  • the loading / unloading of new / used cylinders on the extractor devices 28 of the side carriage is performed in a rectification workshop 20 located at side of hall 21 of the rolling mill.
  • one or more storage racks mechanized 40 can be placed in front of the carriage handling 18 when it is in its most remote position inside the workshop rectification 20.
  • Figure 6 is a cross-sectional view of such a device which is mounted on a frame lower 42 carried by wheels 43 rolling on rails 44 parallel to the direction of advance of the strip to be laminated, i.e. perpendicular to axes of the cylinders in place in the cage 1.
  • the device comprises two racks 40, 40 'arranged side by side on a frame 47 resting on the frame 42 by means of four supports 51 in height adjustable, which may consist, for example, of screw-actuators actuated synchronously by through link bars 52 and cross references angle 53, by a geared motor group 56 allowing a vertical up and down movement of the frame 47 carrying the racks 40, 40 '.
  • height adjustable which may consist, for example, of screw-actuators actuated synchronously by through link bars 52 and cross references angle 53, by a geared motor group 56 allowing a vertical up and down movement of the frame 47 carrying the racks 40, 40 '.
  • Each rack consists of a chassis 46 in U shape supporting two superimposed bed bases, respectively upper 48 and lower 49, equipped each of a series of 50 parallel cradles and defining two levels of reception.
  • the upper level 48 cradles are at right those of the lower level 49 and the distance vertical between the two reception levels is equal to the vertical distance between the axes of blind bores 35 of the support member 34.
  • each level comprises five cradles 50 each rack 40 can therefore receive five pairs of working cylinders 4.
  • the box springs 46 are open on the right side on figure so that by a movement of longitudinal translation to the left of the device extraction 28, the two working cylinders 4, 4 ' carried by the support member 34 can be placed above two superimposed cradles 50 which have been left free on the two box springs 48 and 49.
  • the support member 34 being discharged, it is possible to move back the extraction device 28 to release the journals of the worn cylinders then center a transverse movement of the rack 40 to control, depending on the program to be carried out, a pair of new cylinders on the mediator plane of the device extraction. This is then advanced so that the housings 35 of the support member 34 engage on the pins of the two replacement cylinders.
  • the rack 40 can then be moved aside to allow axial movement of the carriage handling 18 which is placed on hold next to of cage 1, the free space of the carriage 25 being centered on the clamping plane P '.
  • the device is thus ready to proceed with the removal of the cylinders in service and replacing them with new ones cylinders taken from rack 40 at the time indicated by the rolling program.
  • the main carriage 18 is on the side of the rack 40 opposite the rolling stand 1.
  • each cage of rolling mill would be equipped with a main carriage 18 with side carriage 25 and extractor device 28, each storage rack 40 working cylinders 4 can serve multiple cages.
  • the handling cart 18 is then approached of cage 1, in the position illustrated by the figure 1, the extractor device 28 being moved back towards the right in the figure.
  • One of the boxes of the carriage 25 is empty and is centered on the median plane P 'of the cage by lateral movement of the carriage 25.
  • the extractor device 28 is then advanced and allows, as indicated, to remove either the two working cylinders only, i.e. the two inserts and, by retraction of the extractor device 28, the cylinders are placed on the cart 25. The latter is then moved to center the cylinders of replacement which are introduced into the cage in commanding reverse operations.
  • the extractor device 28 When the entire insert has been removed, the extractor device 28 is detached from the chocks intermediate cylinders and can be advanced to place the working cylinders alone in two empty cradles of rack 40 previously centered on the mediator plane of the extractor device 28, the rest of the insert remaining in box 29 of the carriage lateral 25. Therefore, one can proceed to the verification and, possibly, replacement of inserts without risk of damage to the cylinders job.
  • the extraction device 28 goes back on the carriage 25 and, after unloading, is moved back to clear the rack 40.
  • This is then moved to center the new working cylinders on the median plane of the extraction device 28, is then advanced to take over the new cylinders.
  • the handling 18 can again be advanced until the cage to be ready for a new operation of replacement.
  • the working cylinders are carried, in disassembly position, by forks 62, 62 ' but other support devices could be used to hold working cylinders separated at a constant level from the cylinders intermediate.
  • these cylinders could be used to adjust the level axes of the working cylinders at the axes housings 35 of the support member 34 and, then determine the lowering of either working cylinders to allow it to be load by the support member 34.
  • the lower working cylinder 4 'rests on the lower intermediate cylinder 3 ' you can use the level adjustment means thereof to order the taking over of the cylinder lower work 4.
  • the lower support assembly E2 is supported by adjustable shims 17b, these can be used so as to place the axis of the working cylinder lower 4 'at the level of the housing axis 35' from the support member 34, the level of the cylinder higher work 4 being determined, as previously by forks 62.
  • the handling trolley 18 could carry only one extraction device 28 axially displaceable.
  • each of them is equipped with a device extractor.
  • the carriage 42 carries two racks 40, 40 'simply placed on the frame 47. It is therefore possible, by means of a lifter, remove one of the racks to replace all the cylinders, the other rack allowing to continue operations according to the rolling. But we could also use just one rack with sufficient number of places for working cylinders.
  • a rack could be used. storage with a single adjustable level bed base for ensure the replacement of a single working cylinder.
  • the invention is specially suitable for replacing working cylinders only or complete inserts in a "Z-High" type rolling mill but could be used in any rolling mill using cylinders devoid of chocks.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Warehouses Or Storage Devices (AREA)
  • Crushing And Grinding (AREA)
  • Feeding Of Workpieces (AREA)
  • Carriers, Traveling Bodies, And Overhead Traveling Cranes (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Replacement Of Web Rolls (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Forklifts And Lifting Vehicles (AREA)
EP98402518A 1997-10-10 1998-10-09 Dispositif de changement des cylindres de travail et/ou des cylindres intermédiaires d'une cage de laminoir, et ratelier de stockage pour un tel dispositif Expired - Lifetime EP0908246B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9712705A FR2769525B1 (fr) 1997-10-10 1997-10-10 Dispositif de changement des cylindres de travail et/ou des cylindres intermediaires d'une cage de laminoir, et ratelier de stockage pour un tel dispositif
FR9712705 1997-10-10

Publications (2)

Publication Number Publication Date
EP0908246A1 EP0908246A1 (fr) 1999-04-14
EP0908246B1 true EP0908246B1 (fr) 2003-04-16

Family

ID=9512101

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98402518A Expired - Lifetime EP0908246B1 (fr) 1997-10-10 1998-10-09 Dispositif de changement des cylindres de travail et/ou des cylindres intermédiaires d'une cage de laminoir, et ratelier de stockage pour un tel dispositif

Country Status (7)

Country Link
US (1) US6098439A (es)
EP (1) EP0908246B1 (es)
AT (1) ATE237413T1 (es)
CA (1) CA2250498C (es)
DE (1) DE69813435T2 (es)
ES (1) ES2192755T3 (es)
FR (1) FR2769525B1 (es)

Families Citing this family (18)

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Publication number Priority date Publication date Assignee Title
IT246987Y1 (it) * 1999-08-06 2002-05-02 C M G Costruzioni Meccaniche G Macchina trasformabile per la alvorazione superficiale di carta
DE20004856U1 (de) * 2000-03-16 2000-05-25 Achenbach Buschhütten GmbH, 57223 Kreuztal Walzenwechselvorrichtung für Walzgerüste, insbesondere Sextowalzgerüste
DE10138588A1 (de) * 2001-08-06 2003-02-20 Sms Demag Ag Einrichtung zum Wechseln der Arbeits- und Stützwalzen eines Bandwalzwerkes
JP4135351B2 (ja) * 2001-10-12 2008-08-20 株式会社日立製作所 多列圧延機及びその使用方法並びに圧延設備
FR2846579B1 (fr) * 2002-11-05 2006-05-05 Vai Clecim Procede pour elargir la gamme de production d'une installation de laminage de produits metalliques et installation pour la mise en oeuvre du procede
CN100381219C (zh) * 2004-01-20 2008-04-16 郑红专 多辊轧机换辊装置
KR101078258B1 (ko) * 2006-01-09 2011-10-31 에스엠에스 지마크 악티엔게젤샤프트 작업 롤 및/또는 받침 롤의 취급/이송 방법 및 그 장치
JP5264140B2 (ja) * 2007-10-16 2013-08-14 Ｉｈｉメタルテック株式会社 マグネシウム合金熱間圧延装置
KR101419991B1 (ko) * 2009-05-13 2014-07-15 봅스트 맥스 에스에이 포장지 제조용 기계에서 용이한 공구 조정을 갖는 잔부 배출 유닛
DE102009060640A1 (de) 2009-07-07 2011-01-13 Sms Siemag Ag Clusterarmanordnung für die Zwischenwalzensätze von 18 HS Walzgerüsten
EP2646179B1 (fr) * 2010-12-02 2019-03-06 Primetals Technologies France SAS Installation pour et methode de changement des cylindres et/ou grappes d'une cage de laminage ; cage de laminage comprenant un systeme de verrouillage et de clamage
ITTO20120001A1 (it) * 2012-01-04 2013-07-05 Mino S P A Laminatoio multicilindro, in particolare di tipo sesto
EP2777832A1 (fr) * 2013-03-13 2014-09-17 Siemens VAI Metals Technologies GmbH Dispositif de mise en rotation de cylindres de travail d'un laminoir et méthode de changement des dits cylindres
WO2015050823A2 (en) 2013-10-02 2015-04-09 Fives Bronx, Inc. Roll change apparatus
DE102014005331B3 (de) * 2014-02-11 2015-05-21 Sms Meer Gmbh Werkzeugwechselsystem und -verfahren sowie Reckwalze
FR3108047B1 (fr) * 2020-03-10 2022-04-01 Fives Dms Outil et procédé de changement de cylindre de travail dans laminoir
CN112008643A (zh) * 2020-08-11 2020-12-01 阜阳卷烟材料厂 一种滤棒开松系统更换橡塑辊的辅助装置及更换方法
CN115847353B (zh) * 2022-11-09 2023-06-09 东莞海裕百特智能装备有限公司 一种辊压机快速换辊装置及方法

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JPS5468754A (en) * 1977-11-11 1979-06-02 Hitachi Ltd Roll rearranging device and its handling method
JPS5496457A (en) * 1978-01-18 1979-07-30 Hitachi Ltd Rearranging apparatus for rolls
US4270377A (en) * 1978-05-19 1981-06-02 T. Sendzimir, Inc. Eighteen high rolling mill
JPS6056564B2 (ja) * 1980-06-18 1985-12-11 株式会社日立製作所 圧延機のロ−ル組替装置
JPS6313606A (ja) * 1986-03-14 1988-01-20 Nippon Steel Corp 圧延機のロ−ル組替方法及びその設備
DE3925408C1 (es) * 1989-08-01 1990-04-12 Sundwiger Eisenhuette Maschinenfabrik Grah & Co, 5870 Hemer, De
JPH0366405A (ja) * 1989-08-02 1991-03-22 Hitachi Ltd 圧延機のロール組替装置
GB9410408D0 (en) * 1994-05-23 1994-07-13 Davy Mckee Poole Roll change device for cluster mill

Also Published As

Publication number Publication date
CA2250498A1 (fr) 1999-04-10
US6098439A (en) 2000-08-08
ES2192755T3 (es) 2003-10-16
FR2769525A1 (fr) 1999-04-16
EP0908246A1 (fr) 1999-04-14
DE69813435T2 (de) 2003-10-16
DE69813435D1 (de) 2003-05-22
CA2250498C (fr) 2007-04-10
FR2769525B1 (fr) 1999-12-31
ATE237413T1 (de) 2003-05-15

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