EP0432532B1 - Train de laminoir à haute performance pour barres ou fils - Google Patents

Train de laminoir à haute performance pour barres ou fils Download PDF

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Publication number
EP0432532B1
EP0432532B1 EP90122276A EP90122276A EP0432532B1 EP 0432532 B1 EP0432532 B1 EP 0432532B1 EP 90122276 A EP90122276 A EP 90122276A EP 90122276 A EP90122276 A EP 90122276A EP 0432532 B1 EP0432532 B1 EP 0432532B1
Authority
EP
European Patent Office
Prior art keywords
roll
rolling
train
horizontal
stands
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
EP90122276A
Other languages
German (de)
English (en)
Other versions
EP0432532B2 (fr
EP0432532A3 (en
EP0432532A2 (fr
Inventor
Alfred Müller
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 Schloemann Siemag AG
Schloemann Siemag AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by SMS Schloemann Siemag AG, Schloemann Siemag AG filed Critical SMS Schloemann Siemag AG
Publication of EP0432532A2 publication Critical patent/EP0432532A2/fr
Publication of EP0432532A3 publication Critical patent/EP0432532A3/de
Application granted granted Critical
Publication of EP0432532B1 publication Critical patent/EP0432532B1/fr
Publication of EP0432532B2 publication Critical patent/EP0432532B2/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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
    • B21B1/18—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section in a continuous process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
    • B21B1/0815—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel from flat-rolled products, e.g. by longitudinal shearing
    • 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
    • B21B13/005—Cantilevered roll stands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B15/0007—Cutting or shearing the product
    • B21B2015/0021—Cutting or shearing the product in the rolling direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/02—Shape or construction of rolls
    • B21B27/03—Sleeved rolls

Definitions

  • the invention relates to a high-performance steel bar / wire mill, in particular for the single-core, twist-free rolling of rolling stock.
  • the object of the invention is to optimize the individual road sections of the steel bar / wire mill, in particular to increase their availability, to roll the wire or the bar steel in a swirl-free manner in all road sections and to reduce the plant costs through the optimized use of roll stands with certain predetermined properties.
  • the roll change of the high-performance steel bar / wire mill takes place in accordance with the minimized caliber series in each section of the street, namely in the roughing train using a crane tool, in the intermediate street using a manipulator and in the finishing train using a quick-change device.
  • Roll units in the individual road sections have overhung rollers.
  • the design of the entire rolling mill with roll stands or rolling units with flying roll shafts on which the rolling rings are mounted allows short changeover times, ie long conversion times are not necessary, so that the mill is practically always ready for rolling. No interchangeable scaffolds are required.
  • the roll change is provided in accordance with the minimized caliber series, the roll change can be made according to the frequency and the necessity taking into account the Wear conditions and quality assurance take place, whereby the most suitable and optimally adapted to the changing process and taking into account the roll weight changing devices are used.
  • the result shows a twist-free rolling of the rolling stock in the entire rolling mill with high availability and a rolled product with high quality and quality.
  • the roughing and intermediate lines in an alternating sequence have horizontal-vertical compact stands.
  • the finishing train seen in the rolling direction initially consists of horizontal-vertical compact stands, followed by a rolling block having a vertical and horizontal rolling unit, the horizontal rolling unit of which can only be used for separating the rolling stock in two separate rolling cores, while the vertical rolling unit of which is for normal rolling of the rolling stock can be used.
  • This design of the individual road sections has several advantages: The space required for the scaffolding is minimized. The entire length of the rolling mill is reduced because the compact stands can be positioned closer together; no roller tables between the scaffolding are required. Due to the standardization of the optimized roll change, the stock of spare parts is low. The changeover times are reduced.
  • the proposed use of a two-stand vertical-horizontal mini-block with overhung rollers is particularly advantageous as a replacement for the tilting and rotating stands previously used if, for example, the single-wire rolled rolling stock is to be subjected to a separating roller. Because in the case of separation rolling of the rolling stock, only the horizontal rolling unit of the stand is used for the separation stitch, while in the case of normal rolling only the vertical unit is in operation. The other roller unit is simply left to run empty or the corresponding roller cassette is removed.
  • the horizontal-vertical rolling block for the last passages of the separating rolling are arranged downstream of two duo roll stands with the rolling sequence from the oval caliber to the round caliber. So if the horizontal rolling unit of the horizontal-vertical rolling block in the finishing train is used for separating rolling of the rolling stock - the vertical rolling unit of the rolling block does not perform any rolling work - each strand of the rolling stock separated into two roll cores in the horizontal stands by means of rollers with two calibers each Completely rolled so that the formed rolling stock can then be driven onto the cooling bed as finished bar steel.
  • An advantageous embodiment of the invention shows that the vertical-horizontal rolling block of the finishing train for the last passages of the separating rolling in the finishing train is followed by at least two compact and one vertical rolling unit (VH).
  • VH vertical rolling unit
  • a C-shaped carrier tool pivotably attached to a crane bridge is used to change the rolling rings of at least the horizontal compact stands , at the lower center of gravity of which a common changing device for the rolling rings is arranged. Since the rolling rings in this section of the road have a very high weight of about 150 to 450 kilograms, on the other hand they have a comparatively long service life of several days with a maximum permissible rolling capacity, the use of the roller changing device proposed here is optimally adapted to the rolling technology in the roughing mill, both with regard to the structural effort and the time required for the changing device.
  • a quick-change device which has a liftable and rotatable, if appropriate, displaceably designed and arranged on a movable change carriage for the two corresponding roller rings of each vertical and horizontal stand.
  • the rolling rings in these sections of the road are heavily stressed, among other things, because of the high rolling speed and, despite the best choice of materials such as tungsten carbide, only have an average lifespan of around one to two days with maximum rolling performance.
  • the invention with the proposed quick-change device does justice to the need for quick and accurate roller change that can be controlled from a control room.
  • a further improving embodiment of the invention provides that the roll changing device has at least two receiving devices which can be pivoted about its axis of rotation for an assembly frame which receives at least the rolling rings.
  • the maintenance personnel are given the opportunity to hold new rolling rings on a building site ready for assembly, which are inserted into the receiving device of the mobile changing device.
  • the receiving device is then pivoted accordingly and the finished rolling rings are placed on the site for further handling.
  • the change car is driven back into the road section.
  • the individual processes when changing the roll can thus be carried out using conventional control or Control elements are fully automated.
  • the rolling fittings can be inserted into the mounting frame and that the corresponding rolling rings can be fixed in the operating position. This results in an even more complete pre-assembly on the building site, which ultimately the roll change times are also shortened and the availability of these road sections increases. Overall, the availability of the entire steel bar / wire mill is improved. In this sense, it is also expedient if, according to a further proposal of the invention, the front plate has centering and clamping pieces for fixing the mounting frame on the front plate of the compact frame. A mounting frame designed in this regard is explained in more detail below in the special description.
  • the high-performance steel bar / rolling mill is shown with the roughing mill 1, which consists of roll stands arranged side by side in the rolling line with the stand sequence horizontal (H) / vertical (V), followed by the intermediate line 2, which are also arranged side by side Roll stands with the horizontal (H) / vertical (V) stand sequence, which is followed by finishing train 3.
  • the finishing train 3, which is the intermediate line in the wire production, is followed by the finishing block 4 with the cooling device (not shown in more detail), usually consisting of a water cooling section with a driver / winding layer and the Stelmor system.
  • the finishing train 3 is followed by a cooling or storage bed 6.
  • FIG. 2 and 3 show, in an enlarged detail, the finishing train 3, in which a rolling block 7, which consists of two rolling units in the sequence vertical / horizontal, follows three rolling stands with the horizontal / vertical / horizontal stand sequence.
  • a rolling block 7 which consists of two rolling units in the sequence vertical / horizontal
  • two horizontal duo stands 8 are arranged downstream of the vertical / horizontal rolling block 7.
  • the rollers 9 of these duo stands each have at least two calibers 10, 11. It can be clearly seen that in the horizontal roller unit 7 ′′ of the rolling block 7, the rolling stock 12 is separated from a single rolling strand onto two rolling strands 12 ′, 12 ′′ and each of these rolling strands in the two subsequent horizontal stands 8 one Oval / round rolling is subjected.
  • the vertical rolling unit 7 'of the roll block 7 runs along empty or that the corresponding roll cassette is removed.
  • Fig. 3 it is shown that in the case of separating rolling of the rolling stock 12 with the help of the horizontal rolling unit 7 ′′ of the rolling block 7, two two-stand rolling blocks 13, 14 are arranged downstream, specifically for each rolling strand 12 ′ or 12 ′′. one roll block each 13 and 14.
  • Each roll block 13, 14 has two roll units 13 ', 13''; 14 ', 14''in the vertical / horizontal roller sequence.
  • the tilting or rotating stands usually used at this point are replaced by the vertical / horizontal rolling block 7 in the finishing train 3.
  • the horizontal duo stands shown in FIG. 2 are replaced by the vertical / horizontal rolling blocks 13, 14.
  • the crane tools 15 for changing the rolling rings 18, in particular the horizontal stands (FIG. 4) in the roughing street 1, consist of a C-shaped carrier tool 19 which is pivotably suspended on a crane bridge 20.
  • a handwheel-operated roll changing device 21 is arranged, which receives the corresponding roll rings 18 of the roll stand together.
  • a lever system 22 is provided with an end projection 23 which engages in the caliber 24 of the rolling rings 18 when the handwheel is rotated and the guide nut 25 is thus moved longitudinally.
  • the roll changing device 21 'for the rolling rings of the vertical stands can, for example, be of the conventional design Ropes of a crane are raised (Fig. 4b). In the simplest version it is also possible that the crane cables can be attached directly to the roller rings (Fig. 4c).
  • FIG. 5 shows the use of a manipulator 16 for changing the rolling rings 31, 32 of a vertical compact stand 33 (FIG. 5a) or a horizontal compact stand 34 (FIG. 5b) in the intermediate street 2.
  • the manipulator 16 is on a carrier bridge 26 attached, and connectable to a hydraulic system, not shown.
  • the manipulator usually consists of joint systems 27, 28, so that the head 29 of the manipulator, which carries the changing device 35 for the roller rings 31, 32, can be moved on all sides.
  • the head 29 of the manipulator 16 can be controlled by the operating personnel in each direction of movement with the aid of a control lever 30, so that the rolling rings 31, 32 are pulled off the respective rolling stand in the shortest possible time and can be exchanged for new rolling rings 31 'or 32', respectively store the site 36 prepared.
  • a quick-change device 17, which is shown in FIG. 6, is provided for changing the rolling rings 46 in the finishing train 3.
  • the quick-change device 17 consists of a change carriage 37, which can be moved by a piston-cylinder linkage 38 on a conventional rail arrangement between the roll stands 42, 43 and a construction site 39.
  • the changing device has a lifting and rotating mounting device 40, the movement of which is indicated by arrows and which, according to FIG. 6a, has two diametrically opposite roller carriers 44, each with a receiving opening 41 at least for the corresponding roller rings 46 of the vertical compact stand 42
  • the receiving opening can thus carry the finished rolling rings of the roll stand 42, while the other receiving opening the new rolling rings prepared on site 39.
  • the receiving device 40 for the roller rings of the horizontal compact stand 43 is designed somewhat differently according to FIG. 6b, in that the two opposite roller carriers 44 on the change carriage can be moved so far according to the movement arrow that there is sufficient space for mounting or dismounting the roller rings if the receiving device 40 is rotated accordingly on the change carriage
  • FIG. 7 A particularly advantageous mounting system is shown in FIG. 7, namely a mounting frame 45 which can be inserted into the receiving openings 41 of the quick-change device 17 in FIG. 6.
  • the corresponding roller rings 46, 46 ' are fixed in the mounting position 45 in the installation position and thus in the operating position.
  • the rolling fittings 47, 47 'of the inlet and outlet sides are firmly inserted in the mounting frame.
  • the rolling rings are fixed in the installation position with the aid of a conventional and therefore not shown lever system, the mounting hooks 48, 48 'of which are placed on the circumference of each rolling ring or on the caliber of the rolling ring for secure positioning.
  • Centering pieces 49 and clamping devices 50 are provided on the front plate 52. These measures serve to center and fix the assembly frame on the front plate of the respective compact stand of the finishing train 3.
  • the quick-change device shown in FIG. 6 can be used even more effectively for the rolling rings.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Crushing And Grinding (AREA)

Claims (6)

  1. Train pour barres/fils d'acier à capacité élevée, notamment pour le laminage sans torsion d'un produit à laminer (12), comportant un train de prélaminage (1) équipé de plusieurs cages ou unités de laminage, au moins un train de laminage intermédiaire (2) et un train de finition suivant (3) et éventuellement un bloc de finition qui suit (4), le remplacement des cylindres s'effectuant, dans le train de prélaminage (1) à l'aide d'un outil suspendu à un pont roulant (15), dans le train intermédiaire (2) à l'aide d'un manipulateur (16) et dans le train de finition (3) à l'aide d'un dispositif de remplacement rapide (17) éventuellement, en plus, à l'aide d'un manipulateur, en fonction des séries de calibres réduits dans chaque tronçon de train, et toutes les cages ou unités de laminage des divers tronçons de train (1,2,3,4) comportant des cylindres extractables en porte à faux (18, 31, 32, 46), le train de laminage (1) et le train de laminage intermédiaire (2) comportant, en vue du laminage sans torsion du produit à laminer (12), selon une séquence alternative, des cages horizontales et verticales (H-V) et le train de finition (3) étant constitué, vu dans la direction de laminage, au moins de cages horizontales et verticales (H-V) suivies d'un bloc de laminage (7) comportant une unité de laminage verticale et une unité de laminage horizontale (V-H) dont l'unité de laminage horizontale (H) est exclusivement utilisable pour le laminage séparé du produit à laminer (12) dans deux voies de laminage séparées (12',12''), tandis que l'unité de laminage verticale (V) dudit bloc est utilisable pour le laminage normal du produit à laminer, et le bloc de laminage vertical-horizontal (7) du train de finition (3) étant suivi de deux cages Duo (8) pour les dernières passes du laminage séparé dans le train de finition, comportant une séquence de cylindres permettant de passer du calibre oval au calibre rond (Figure 2).
  2. Train de laminage selon la revendication 1 caractérisé en ce que le bloc de laminage vertical-horizontal (7) du train de finition (3) est suivi d'au moins deux blocs de laminage compacts (14) comportant chacun une unité de laminage verticale et une unité de laminage horizontale (V-H), pour les dernières passes du laminage séparé dans le train de finition.
  3. Train de laminage selon la revendication 1 ou 2 caractérisé en ce que le train de prélaminage (1) est équipé d'un dispositif de suspension (19) coudé en forme de C et suspendu de façon pivotable à un pont de grue (20), auquel un dispositif de remplacement (21) commun des bagues de laminage (18) au moins des cages horizontales est agencé à l'endroit du centre de gravité inférieur, le train de laminage intermédiaire (2) étant équipé d'un manipulateur (16) mobile de tous côtés, dont la tête (29) porte le dispositif de remplacement (35) des bagues de laminage (31,32) des cages (33, 34) et qui est commandable manuellement, et le train de finition (3) étant équipé d'un dispositif de remplacement (17) des deux bagues de laminage correspondantes (46) de chaque cage verticale et horizontale (42,43), agencé de façon à pouvoir se lever, tourner et éventuellement se déplacer, sur un chariot de remplacement (37).
  4. Train de laminage selon la revendication 1, 2 ou 3 caractérisé en ce que le dispositif de remplacement (17) comporte au moins deux dispositifs de serrage (40) pivotables autour de leur axe de rotation (51), pour un cadre de montage (45) qui porte au moins les bagues de laminage.
  5. Train de laminage selon la revendication 4 caractérisé en ce que les appareils connexes de laminage (47) sont agençables dans le cadre de montage (45) et en ce que les bagues de laminage correspondantes (46,46') y sont fixables en position de fonctionnement.
  6. Train de laminage selon la revendication 4 ou 5 caractérisé en ce que la plaque frontale (52) comporte des éléments de centrage et de serrage (49,50) pour la fixation du cadre de montage (45) sur la plaque frontale (52) de la cage compacte (42,43).
EP90122276A 1989-12-09 1990-11-22 Train de laminoir à haute performance pour barres ou fils Expired - Lifetime EP0432532B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3940736 1989-12-09
DE3940736A DE3940736A1 (de) 1989-12-09 1989-12-09 Hochleistungs-stabstahl/drahtstrasse

Publications (4)

Publication Number Publication Date
EP0432532A2 EP0432532A2 (fr) 1991-06-19
EP0432532A3 EP0432532A3 (en) 1993-07-07
EP0432532B1 true EP0432532B1 (fr) 1996-04-24
EP0432532B2 EP0432532B2 (fr) 2004-11-03

Family

ID=6395137

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90122276A Expired - Lifetime EP0432532B2 (fr) 1989-12-09 1990-11-22 Train de laminoir à haute performance pour barres ou fils

Country Status (5)

Country Link
US (1) US5123269A (fr)
EP (1) EP0432532B2 (fr)
JP (1) JPH03189003A (fr)
AT (1) ATE137146T1 (fr)
DE (2) DE3940736A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1288849B1 (it) * 1996-02-12 1998-09-25 Danieli Off Mecc Procedimento perfezionato per la laminazione di prodotti lunghi e linea di laminazione che realizza detto procedimento
US5893288A (en) * 1997-04-25 1999-04-13 Morgan Construction Company Multiple outlet finishing mill
DE102018219874B4 (de) 2018-11-20 2020-08-20 Sms Group Gmbh Schnellwechselbares Walzgerüst
US11478831B2 (en) 2020-03-04 2022-10-25 Primetals Technologies USA LLC Mechanical high speed roll change system for use with robotic roll change system
CN114130830B (zh) * 2021-11-26 2024-03-22 中冶华天工程技术有限公司 一种平立轧机的换辊装置

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1833376A (en) * 1930-10-29 1931-11-24 Ira J Simmons Rolling mill
FR1214474A (fr) * 1958-01-29 1960-04-08 Demag Ag Train continu de laminoir et accessoires pour ce train
FR1545751A (fr) * 1967-09-13 1968-11-15 Wtz Feikeramischen Ind Dispositif pour l'échange d'outils mobiles démontables, en particulier de disques de laminage
CH487681A (it) * 1968-09-30 1970-03-31 Pomini Farrel Spa Treno continuo di laminazione
DE1933273B1 (de) * 1969-07-01 1971-01-28 Suedwestfalen Ag Stahlwerke Walzverfahren zur Herstellung von Draht oder anderem stabfoermigem Walzgut
DE2032294A1 (de) * 1970-06-30 1972-01-05 Demag Ag, 4100 Duisburg Drahtwalzwerk in Blockbauform
BE784118A (fr) * 1971-06-05 1972-09-18 Schloemann Ag Procede de laminage de petits fers dans un laminoir a grande capacite, et laminoir a petits fers pour la mise en oeuvre du procede
DE2908409C2 (de) * 1979-03-03 1985-12-05 Friedrich Kocks GmbH & Co, 4010 Hilden Walzstraße zum Walzen von Stäben oder Draht
US4357819A (en) * 1980-06-11 1982-11-09 Structural Metals, Inc. Method and apparatus for simultaneously forming three uniform metal rounds
IT1209050B (it) * 1983-11-11 1989-07-10 Danieli Off Mecc Rulli e attrezzature su gabbie di dispositivo per la sostituzione di laminazione con rulli a sbalzo.
IT1187613B (it) * 1985-12-16 1987-12-23 Danieli Off Mecc Metodo per laminare sezioni multiple e laminati cosi' ottenuti
IT210782Z2 (it) * 1986-08-01 1989-01-11 Danieli & C Offine Meccaniche Unita' di laminazione a sbalzo.
JPH07201B2 (ja) * 1986-08-19 1995-01-11 新日本製鐵株式会社 圧延ロ−ル交換方法
US4706485A (en) * 1986-12-15 1987-11-17 Morgan Construction Company Carrier module

Also Published As

Publication number Publication date
DE3940736A1 (de) 1991-06-13
DE59010301D1 (de) 1996-05-30
ATE137146T1 (de) 1996-05-15
EP0432532B2 (fr) 2004-11-03
JPH03189003A (ja) 1991-08-19
EP0432532A3 (en) 1993-07-07
US5123269A (en) 1992-06-23
EP0432532A2 (fr) 1991-06-19

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