EP0345241A1 - Method for producing a laminated section comprising a corrugated part, and installation therefor - Google Patents

Method for producing a laminated section comprising a corrugated part, and installation therefor Download PDF

Info

Publication number
EP0345241A1
EP0345241A1 EP89870077A EP89870077A EP0345241A1 EP 0345241 A1 EP0345241 A1 EP 0345241A1 EP 89870077 A EP89870077 A EP 89870077A EP 89870077 A EP89870077 A EP 89870077A EP 0345241 A1 EP0345241 A1 EP 0345241A1
Authority
EP
European Patent Office
Prior art keywords
profile
folding
rollers
rolling
shaping
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
EP89870077A
Other languages
German (de)
French (fr)
Other versions
EP0345241B2 (en
EP0345241B1 (en
Inventor
Jean Marcel Julien Ecrepont
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.)
Profilarbed SA
Original Assignee
Cockerill Sambre SA
Profilarbed 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=3883447&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0345241(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Cockerill Sambre SA, Profilarbed SA filed Critical Cockerill Sambre SA
Priority to AT89870077T priority Critical patent/ATE73515T1/en
Publication of EP0345241A1 publication Critical patent/EP0345241A1/en
Application granted granted Critical
Publication of EP0345241B1 publication Critical patent/EP0345241B1/en
Publication of EP0345241B2 publication Critical patent/EP0345241B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C3/06—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with substantially solid, i.e. unapertured, web
    • 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
    • B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
    • B21D3/02—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by rollers
    • B21D3/05—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by rollers arranged on axes rectangular to the path of the work
    • 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
    • B21D47/00—Making rigid structural elements or units, e.g. honeycomb structures
    • B21D47/01—Making rigid structural elements or units, e.g. honeycomb structures beams or pillars
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0408—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section
    • E04C2003/0421—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section comprising one single unitary part
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0426—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by material distribution in cross section
    • E04C2003/0434—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by material distribution in cross section the open cross-section free of enclosed cavities
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0443—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by substantial shape of the cross-section
    • E04C2003/0452—H- or I-shaped

Definitions

  • the present invention relates to a process for the manufacture of laminated sections such as a U or a beam, more particularly an I-beam, comprising a corrugated part in particular a wing or a core.
  • an I-beam having a corrugated core welded to the flanges.
  • a manufacturing process in which a planar core is welded to a pair of flanges and the beam thus formed passes between two cylinders stamping the soul of the beam in a desired manner.
  • a beam of the aforementioned type is however subjected to significant internal stresses.
  • the weld creates tensions in the beam which risk deforming it and / or warping the soles.
  • the rolling of a part of the core implies an elongation thereof with the consequence of a reduction in its thickness.
  • This also results in high tensions on the welds between the core and the soles and internal tensions in the core, given the differential deformations.
  • These tensions also risk deforming the finished beam and / or warping it.
  • these tensions can have an unfavorable influence on the behavior of the beam and in particular on its mechanical resistance to the various forces to which it may be subjected during its use.
  • this process necessarily involves a weldable steel.
  • Document LU-A-83 044 discloses a method of manufacturing an I-beam, with a corrugated core in its middle, according to which corrugations are formed in a median part of the core of an ordinary I-beam finished by means of two cylinders which mesh in a complementary manner.
  • the increase in the developed length of the corrugated core from the straight length of a flat core before formation of the corrugations is ensured by the reduction in the thickness of the core under the effect of the wave formation work.
  • the I-beam with corrugated core is obtained from a finished ordinary beam and this by means of one or more rolling operations between two opposite structured cylinders.
  • the additional length is provided by the reduction in the thickness of the core thanks to the action of two structured cylinders, which obviously causes internal tensions and a significant work hardening of the material and, therefore, a camber or a twist of the I-beam.
  • the holder of the aforementioned patent attempts to remedy this drawback by forming the corrugations in the core in two or more passes.
  • the problem of internal tensions is not at all resolved and, moreover, the process is quite expensive.
  • Document FR-A-744 933 discloses metal sections with a locally reduced cross-sectional core, obtained by simple rolling.
  • the latter seeks to provide a simple method for the manufacture of a profile of the aforementioned type, and of a cost practically equivalent to that of a normal beam.
  • Another object of the present invention is to provide a method of manufacturing a profile of the aforementioned type which does not have the drawbacks of the methods known in the prior art and which allows, more particularly, the easy manufacture of laminated profiles comprising a corrugated part which has a minimum of residual tensions and internal stresses.
  • the invention aims to provide an installation of a new type for the manufacture of said profiles.
  • the laminated sections comprising a corrugated part, more particularly I-beams with corrugated core over part of its height, are obtained in the following operating steps: - Classic rolling is carried out in a manner known per se until a blank close to the finish is obtained; - Passing the blank thus obtained between two cylinders, at least one of which has a larger diameter over a portion of its length so as to cause an excess length; - Shaping is carried out by regular and repeated folding of the undulations obtained by the previous step.
  • the rolled profile treated in accordance with the present invention is particularly resistant in particular to bending and buckling. As a result, for a desired mechanical strength, the weight of said profile can be reduced. Furthermore, given the simplicity of the process and various stages implemented, the price of the profile obtained is lower than that of other known types.
  • the method of the invention makes it possible to obtain a profile, a part of which has an undulation without the individual stresses or the internal tensions being significant. Indeed, during the passage of the blank obtained in the first step of the process between two cylinders or rollers, at least one of which has a larger diameter over part of its length, the space between the two cylinders or rollers is therefore locally reduced. The local rolling of the core thus obtained, over a distance less than its height between the flanges, prevents the creep of said flanges. In addition, unwanted wing deformations are avoided.
  • the percentage of additional elongation to be given to the portion of the profile part to be corrugated is substantially equal to the percentage of excess length of the corrugation desired relative to the straight line.
  • the shaping is carried out by folding between two rollers which are situated in a plane essentially perpendicular to the direction of travel of the profile and which have a structured surface, in particular rollers with grooved surface or grooved in the axial direction over a length essentially corresponding to the portion of the largest diameter of the roller or cylinder of the second step and, therefore, to the height portion of the section portion which is corrugated.
  • the opposite structured rolls or rollers only mesh slightly so that the rolled product is folded like a beam on two supports supporting a point load in the middle of its span.
  • the profiles according to the present invention are particularly suitable in applications requiring high strength and low weight.
  • the local rolling of the core over a distance less than its height between the two flanges prevents the creep of said flanges.
  • unwanted wing deformations are also avoided.
  • the shaping step is carried out by folding in a straightener which, moreover, makes it possible to straighten the profile obtained in a conventional manner.
  • the installation intended for the manufacture of a profile of the above-mentioned type comprises at least: - a conventional rolling installation known per se for rolling until a blank close to the finish is obtained; a rolling stand comprising two rolls which are arranged in a plane essentially perpendicular to the running plane of the section of the section to be corrugated and at least one of which has a larger diameter over a central portion of its length, said cage comprising further vertical rolling cylinders of said profile, which impose the external dimensions; - a shaping device by regular folding and repeated continuously.
  • the folding-forming device essentially comprises two cylinders or rollers which are situated in a plane essentially perpendicular to the direction of travel of the profile and which comprise a structured surface, preferably grooved or grooved, in the axial direction over a length essentially corresponding to the height portion of the corrugated part of the profile to be manufactured.
  • the opposite structured cylinders or rollers mesh only slightly one inside the other.
  • an I-shaped section 1 comprising a core 3 and two flanges 5 and 7, laminated in one piece with the core 3.
  • the core 3 comprises, over a portion 9 of its height, a corrugation 11 in the longitudinal direction of the I-section.
  • said section 1 is passed between two cylinders 21 and 23 arranged in a plane essentially perpendicular to the plane of the core 3 and forming part of a cage. rolling 20.
  • the diameter of each of the two cylinders 21 and 23 is greater on a portion 9 than at the ends 25 and 27.
  • the profile 1 is further further laminated by vertical cylinders 28 and 29 which maintain the external dimensions of the profile 1.
  • the profile thus obtained can then pass through a straightener 31, for example equipped with straightening rollers 33 to 38 arranged in a manner known per se to make the laminated profile straight.
  • said dressing cage comprises two rollers 41 and 43 which are arranged in a plane 39 essentially perpendicular to the plane of travel of the profile 1 and which have a surface grooved in the axial direction, one adapting to the another in the manner of a gear, only slightly breaking apart so as to produce a folding (FIG. 3).
  • a rolled profile of a single I-shaped piece with corrugated core is thus obtained, which has very good mechanical properties and little internal stress.
  • the hardening stresses are particularly reduced; as can be seen in Figure 3 where the folding involves curved sections 45 and even linear sections 47 essentially without constraint.
  • one of the two rollers can be rotated while the other is free to rotate.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Metal Rolling (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Laminated Bodies (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Heat Treatment Of Steel (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Air Bags (AREA)

Abstract

Pour fabriquer un profilé laminé en I (1) d'une seule pièce dont une partie (9) de l'âme (3) est ondulée, on fait passer le profilé entre deux galets (21, 23) présentant un diamètre accru sur une portion de longueur et on le fait ensuite passer entre deux cylindres (41, 43) comportant une surface structurée de manière à réaliser un pliage régu­lier continu.To manufacture a one-piece rolled I-section (1) of which a part (9) of the core (3) is corrugated, the section is passed between two rollers (21, 23) having an increased diameter over a length portion and it is then passed between two cylinders (41, 43) having a structured surface so as to produce a continuous regular folding.

Description

Objet de l'inventionSubject of the invention

La présente invention est relative à un procédé pour la fabrication de profilés laminés tel qu'un U ou une poutrelle, plus particulièrement une poutrelle en I, comportant une partie ondulée notamment une aile ou une âme.The present invention relates to a process for the manufacture of laminated sections such as a U or a beam, more particularly an I-beam, comprising a corrugated part in particular a wing or a core.

Elle concerne également une installation parti­culière destinée à cet effet.It also relates to a particular installation intended for this purpose.

Etat de la techniqueState of the art

Par le brevet US-A-4 251 973, on connaît une poutrelle en I ayant une âme ondulée soudée aux semelles. En outre, on y décrit un procédé de fabrication dans le­quel une âme plane est soudée à une paire de semelles et la poutrelle ainsi constituée passe entre deux cylindres emboutissant l'âme de la poutrelle de manière désirée.From US-A-4 251 973, an I-beam is known having a corrugated core welded to the flanges. In addition, there is described a manufacturing process in which a planar core is welded to a pair of flanges and the beam thus formed passes between two cylinders stamping the soul of the beam in a desired manner.

Une poutrelle du type susmentionné est toutefois soumise à d'importantes tensions internes. En effet, la soudure crée dans la poutrelle des tensions qui risquent de la déformer et/ou d'en gauchir les semelles. De plus, le laminage d'une partie de l'âme implique un allongement de celle-ci avec comme conséquence une réduction de son épaisseur. Il en résulte également des tensions élevées sur les soudures entre l'âme et les semelles et des ten­sions internes dans l'âme, vu les déformations différen­tielles. Ces tensions risquent également de déformer la poutrelle finie et/ou de la gauchir. En outre, ces ten­sions peuvent avoir une influence défavorable sur le comportement de la poutrelle et notamment sur sa résistan­ce mécanique aux divers efforts auxquels elle peut être soumise lors de son utilisation. De plus ce procédé impli­que nécessairement un acier soudable.A beam of the aforementioned type is however subjected to significant internal stresses. Indeed, the weld creates tensions in the beam which risk deforming it and / or warping the soles. In addition, the rolling of a part of the core implies an elongation thereof with the consequence of a reduction in its thickness. This also results in high tensions on the welds between the core and the soles and internal tensions in the core, given the differential deformations. These tensions also risk deforming the finished beam and / or warping it. In addition, these tensions can have an unfavorable influence on the behavior of the beam and in particular on its mechanical resistance to the various forces to which it may be subjected during its use. In addition this process necessarily involves a weldable steel.

Par le document LU-A-83 044 (SUMITOMO METAL), on connaît un procédé de fabrication d'une poutrelle en I, à âme ondulée en son milieu, selon lequel on forme des ondulations dans une partie médiane de l'âme d'une pou­trelle en I ordinaire finie au moyen de deux cylindres qui s'engrènent de manière complémentaire. Conformément à ce procédé, l'augmentation de la longueur développée de l'âme ondulée à partir de la longueur rectiligne d'une âme plane avant formation des ondulations est assurée par la réduction de l'épaisseur de l'âme sous l'effet du tra­vail de formation des ondulations.Document LU-A-83 044 (SUMITOMO METAL) discloses a method of manufacturing an I-beam, with a corrugated core in its middle, according to which corrugations are formed in a median part of the core of an ordinary I-beam finished by means of two cylinders which mesh in a complementary manner. In accordance with this method, the increase in the developed length of the corrugated core from the straight length of a flat core before formation of the corrugations is ensured by the reduction in the thickness of the core under the effect of the wave formation work.

De la description et des dessins, il résulte que la poutrelle en I à âme ondulée est obtenue à partir d'une poutrelle ordinaire finie et ce à l'aide d'une ou plusieurs opérations de laminage entre deux cylindres structurés opposés. En effet, le supplément de longueur est apporté par la réduction de l'épaisseur de l'âme grâce à l'action de deux cylindres structurés, ce qui provoque évidemment des tensions internes et un écrouïssage impor­tant de la matière et, de ce fait, une cambrure ou une torsion de la poutrelle en I. La titulaire du brevet sus­mentionné tente de rémédier à cet inconvénient en formant les ondulations dans l'âme en deux ou plusieurs passes. Cependant le problème des tensions internes n'est pas du tout résolu et, de plus, le procédé est assez onéreux.From the description and the drawings, it follows that the I-beam with corrugated core is obtained from a finished ordinary beam and this by means of one or more rolling operations between two opposite structured cylinders. Indeed, the additional length is provided by the reduction in the thickness of the core thanks to the action of two structured cylinders, which obviously causes internal tensions and a significant work hardening of the material and, therefore, a camber or a twist of the I-beam. The holder of the aforementioned patent attempts to remedy this drawback by forming the corrugations in the core in two or more passes. However, the problem of internal tensions is not at all resolved and, moreover, the process is quite expensive.

Par le document FR-A-744 933, on connaît des profilés métalliques à âme de section localement réduite, obtenus par simple laminage.Document FR-A-744 933 discloses metal sections with a locally reduced cross-sectional core, obtained by simple rolling.

Ce document ne mentionne pas la fabrication d'un profilé laminé comportant une partie ondulée. En outre, le passage d'un profilé du type décrit dans les étapes de procédé du brevet LU-A-83 044 (SUMITOMO) mènerait à l'obtention d'un produit dont la section de la partie ré­duite serait encore amincie par laminage, ce qui conduirait aux mêmes inconvénients que ceux repris ci-­dessus.This document does not mention the manufacture of a laminated profile comprising a corrugated part. In addition, the passage of a profile of the type described in the process steps of patent LU-A-83 044 (SUMITOMO) would lead to the production of a product whose cross section of the reduced part would be further thinned by rolling, what would lead to the same disadvantages as those mentioned above.

Buts de l'inventionAims of the invention

Selon un premier aspect de la présente inven­tion, celle-ci cherche à fournir un procédé simple pour la fabrication d'un profilé du type susmentionné, et d'un coût pratiquement équivalent à celui d'une poutrelle nor­male.According to a first aspect of the present invention, the latter seeks to provide a simple method for the manufacture of a profile of the aforementioned type, and of a cost practically equivalent to that of a normal beam.

Un autre but de la présente invention consiste à fournir un procédé de fabrication d'un profilé du type susmentionné qui ne présente pas les inconvénients des procédés connus dans l'état de la technique et qui permet, plus particulièrement, la fabrication aisée de profilés laminés comportant une partie ondulée qui présente un mi­nimum de tensions résiduelles et de contraintes internes.Another object of the present invention is to provide a method of manufacturing a profile of the aforementioned type which does not have the drawbacks of the methods known in the prior art and which allows, more particularly, the easy manufacture of laminated profiles comprising a corrugated part which has a minimum of residual tensions and internal stresses.

Selon un autre aspect, l'invention vise à four­nir une installation d'un type nouveau pour la fabrication desdits profilés.According to another aspect, the invention aims to provide an installation of a new type for the manufacture of said profiles.

Eléments essentiels de l'inventionEssential elements of the invention

Conformément à la présente invention, les profi­lés laminés comportant une partie ondulée, plus particu­lièrement des poutrelles en I à âme ondulée sur une partie de sa hauteur, sont obtenues dans les étapes opératoires suivantes:
- on procède au laminage classique de manière connue en soi jusqu'à obtention d'une ébauche proche de la fini­tion;
- on fait passer l'ébauche ainsi obtenue entre deux cylin­dres dont l'un au moins présente un diamètre plus élevé sur une portion de sa longueur de manière à y provoquer une surlongueur;
- on procède à une mise en forme par pliage régulier et répété des ondulations obtenues par l'étape précédente.In accordance with the present invention, the laminated sections comprising a corrugated part, more particularly I-beams with corrugated core over part of its height, are obtained in the following operating steps:
- Classic rolling is carried out in a manner known per se until a blank close to the finish is obtained;
- Passing the blank thus obtained between two cylinders, at least one of which has a larger diameter over a portion of its length so as to cause an excess length;
- Shaping is carried out by regular and repeated folding of the undulations obtained by the previous step.

Le profilé laminé et traité conformément à la présente invention est particulièrement résistant notam­ment à la flexion et au flambage. Il en résulte que pour une résistance mécanique recherchée, le poids dudit pro­filé peut être réduit. Par ailleurs, vu la simplicité du procédé et des diverses étapes mises en oeuvre, le prix du profilé obtenu est moins élevé que celui des autres types connus.The rolled profile treated in accordance with the present invention is particularly resistant in particular to bending and buckling. As a result, for a desired mechanical strength, the weight of said profile can be reduced. Furthermore, given the simplicity of the process and various stages implemented, the price of the profile obtained is lower than that of other known types.

En outre, le procédé de l'invention permet d'ob­tenir un profilé dont une partie présente une ondulation sans que les contraintes individuelles ou les tensions internes ne soient importantes. En effet, lors du passage de l'ébauche obtenue à la première étape du procédé entre deux cylindres ou galets dont l'un au moins présente un diamètre plus élevé sur une partie de sa longueur, l'es­pace entre les deux cylindres ou galets est donc réduit localement. Le laminage local de l'âme ainsi obtenu, sur une distance inférieure à sa hauteur comprise entre les semelles, empêche le fluage desdites semelles. En outre, on évite les déformations indésirables des ailes. Les dia­mètres plus élevés des cylindres de laminage sur une por­tion de hauteur d'une partie de profilé, notamment sur une portion de l'âme d'une poutrelle en I, et par consé­quent la réduction de l'interstice entre lesdits cylin­dres, créent des tensions qui tendent à allonger la por­tion correspondante de la partie de profilé et provoquent une ondulation de ladite portion. Dans une troisième étape, ces ondulations sont mises en forme par simple pliage. En effet, les ondulations obtenues à la deuxième étape ne présentant pas la régularité désirée, celle-ci est obtenue par un pliage qui permet également d'éliminer essentiellement les contraintes internes induites à la phase précédente.In addition, the method of the invention makes it possible to obtain a profile, a part of which has an undulation without the individual stresses or the internal tensions being significant. Indeed, during the passage of the blank obtained in the first step of the process between two cylinders or rollers, at least one of which has a larger diameter over part of its length, the space between the two cylinders or rollers is therefore locally reduced. The local rolling of the core thus obtained, over a distance less than its height between the flanges, prevents the creep of said flanges. In addition, unwanted wing deformations are avoided. The larger diameters of the rolling rolls over a height portion of a section portion, in particular over a portion of the core of an I-beam, and consequently the reduction of the gap between said rolls, creates tensions which tend to elongate the corresponding portion of the profile part and cause an undulation of said portion. In a third step, these corrugations are shaped by simple folding. Indeed, the undulations obtained in the second step do not have the desired regularity, this is obtained by folding which also essentially eliminates the internal stresses induced in the previous phase.

Contrairement au procédé de l'invention, le pro­cédé connu par le document LU-A-83 044 pratique un lami­nage continu en une seule étape de l'âme d'un profilé la­miné fini. Il en résulte bien entendu des contraintes d'écrouissage importantes.Unlike the process of the invention, the process known from document LU-A-83 044 performs continuous rolling in a single step of the core of a finished laminated section. This naturally results in significant work hardening constraints.

Avantageusement, le pourcentage d'allongement supplémentaire à donner à la portion de la partie de pro­filé à onduler est sensiblement égale au pourcentage de surlongueur de l'ondulation désirée par rapport à la droite. De cette manière, il est garanti que l'opération de pliage ultérieure introduit le moins de contraintes d'écrouissage possible et que l'opération de pliage n'est pas associée à un emboutissage.Advantageously, the percentage of additional elongation to be given to the portion of the profile part to be corrugated is substantially equal to the percentage of excess length of the corrugation desired relative to the straight line. In this way, it is guaranteed that the operation subsequent folding introduces the least possible work hardening constraints and that the folding operation is not associated with stamping.

Selon une forme d'exécution préférée de l'inven­tion, on effectue la mise en forme par pliage entre deux galets qui sont situés dans un plan essentiellement per­pendiculaire au sens de défilement du profilé et qui com­portent une surface structurée, notamment des galets à surface rainurée ou cannelée dans le sens axial sur une longueur correspondant essentiellement à la partie de plus grand diamètre du galet ou cylindre de la deuxième étape et, de ce fait, à la portion de hauteur de la partie de profilé qui est ondulée.According to a preferred embodiment of the invention, the shaping is carried out by folding between two rollers which are situated in a plane essentially perpendicular to the direction of travel of the profile and which have a structured surface, in particular rollers with grooved surface or grooved in the axial direction over a length essentially corresponding to the portion of the largest diameter of the roller or cylinder of the second step and, therefore, to the height portion of the section portion which is corrugated.

En vue d'éviter au maximum l'écrouissage du ma­tériau et en vue de réaliser une opération de pliage et non une opération d'emboutissage, les cylindres ou galets structurés opposés ne s'engrènent que légèrement de telle sorte que le produit laminé se trouve plié à la manière d'une poutre sur deux appuis supportant une charge ponc­tuelle au milieu de sa portée.In order to avoid as much as possible the work hardening of the material and in order to carry out a folding operation and not a drawing operation, the opposite structured rolls or rollers only mesh slightly so that the rolled product is folded like a beam on two supports supporting a point load in the middle of its span.

Les profilés conformes à la présente invention conviennent particulièrement bien dans des applications exigeant une résistance élevée et un poids faible.The profiles according to the present invention are particularly suitable in applications requiring high strength and low weight.

Notamment dans le cas d'un profilé laminé en I, le laminage local de l'âme sur une distance inférieure à sa hauteur comprise entre les deux semelles empêche le fluage desdites semelles. En outre, on évite également les déformations indésirables des ailes.In particular in the case of an I-rolled profile, the local rolling of the core over a distance less than its height between the two flanges prevents the creep of said flanges. In addition, unwanted wing deformations are also avoided.

On peut par exemple citer la construction de châssis rigides de véhicules, notamment les camions ou les véhicules de transport en commun.We can for example cite the construction of rigid chassis of vehicles, in particular trucks or public transport vehicles.

Avantageusement, on réalise l'étape de mise en forme par pliage dans une dresseuse qui, de plus, permet de dresser de manière classique le profilé obtenu.Advantageously, the shaping step is carried out by folding in a straightener which, moreover, makes it possible to straighten the profile obtained in a conventional manner.

Selon un autre aspect de la présente invention, l'installation destinée à la fabrication d'un profilé du type susmentionné comporte au moins:
- une installation classique de laminage connue en soi pour le laminage jusqu'à obtention d'une ébauche proche de la finition;
- une cage de laminage comportant deux cylindres qui sont disposés dans un plan essentiellement perpendiculaire au plan de défilement de la partie de profilé à onduler et dont l'un au moins présente un diamètre plus élevé sur une portion centrale de sa longueur, ladite cage comportant encore des cylindres verticaux de laminage dudit profilé, qui en imposent les dimensions extérieu­res;
- un dispositif de mise en forme par pliage régulier et répété en continu.According to another aspect of the present invention, the installation intended for the manufacture of a profile of the above-mentioned type comprises at least:
- a conventional rolling installation known per se for rolling until a blank close to the finish is obtained;
a rolling stand comprising two rolls which are arranged in a plane essentially perpendicular to the running plane of the section of the section to be corrugated and at least one of which has a larger diameter over a central portion of its length, said cage comprising further vertical rolling cylinders of said profile, which impose the external dimensions;
- a shaping device by regular folding and repeated continuously.

Avantageusement, le dispositif de mise en forme par pliage comporte essentiellement deux cylindres ou ga­lets qui sont situés dans un plan essentiellement perpen­diculaire au sens de défilement du profilé et qui compor­tent une surface structurée, de préférence rainurée ou cannelée, dans le sens axial sur une longueur correspon­dant essentiellement à la portion de hauteur de la partie ondulée du profilé à fabriquer.Advantageously, the folding-forming device essentially comprises two cylinders or rollers which are situated in a plane essentially perpendicular to the direction of travel of the profile and which comprise a structured surface, preferably grooved or grooved, in the axial direction over a length essentially corresponding to the height portion of the corrugated part of the profile to be manufactured.

Selon une forme d'exécution avantageuse, les cylindres ou galets structurés opposés ne s'engrènent que légèrement l'un dans l'autre.According to an advantageous embodiment, the opposite structured cylinders or rollers mesh only slightly one inside the other.

Brève description des figuresBrief description of the figures

L'invention est décrite plus en détail ci-après à l'appui d'un exemple d'exécution supporté par les des­sins dans lesquels:

  • - la figure 1 est un vue en coupe à travers un profilé laminé en I dont l'âme est ondulée sur une partie de sa hauteur;
  • - la figure 2 est une vue schématique de laminage localisé du profilé laminé;
  • - la figure 3 est une vue schématique de l'opération de pliage; et
  • - la figure 4 est une vue schématique de la dresseuse uti­lisée dans l'installation conforme à la pré­sente invention.
The invention is described in more detail below in support of an exemplary embodiment supported by the drawings in which:
  • - Figure 1 is a sectional view through a laminated I-shaped section whose core is corrugated over part of its height;
  • - Figure 2 is a schematic view of localized rolling of the rolled section;
  • - Figure 3 is a schematic view of the folding operation; and
  • - Figure 4 is a schematic view of the straightener used in the installation according to the present invention.

Description détaillée de formes d'exécution préféréesDetailed description of preferred embodiments

Dans les figures, des repères de référence iden­tiques représentent des éléments identiques ou analogues.In the figures, identical reference marks represent identical or analogous elements.

En vue d'illustrer la présente invention, on décrit celle-ci pour un profilé laminé en I à âme ondulée.In order to illustrate the present invention, this is described for a rolled I-shaped profile with a corrugated core.

A la figure 1, on a représenté un profilé en I 1 comportant une âme 3 et deux semelles 5 et 7, laminé d'une seule pièce avec l'âme 3.In FIG. 1, an I-shaped section 1 is shown comprising a core 3 and two flanges 5 and 7, laminated in one piece with the core 3.

L'âme 3 comporte, sur une portion 9 de sa hau­teur, une ondulation 11 dans le sens longitudinal du pro­filé en I.The core 3 comprises, over a portion 9 of its height, a corrugation 11 in the longitudinal direction of the I-section.

En vue de la fabrication d'un profilé en I con­forme à l'invention, on fait passer ledit profilé 1 entre deux cylindres 21 et 23 disposés dans un plan essentielle­ment perpendiculaire au plan de l'âme 3 et faisant partie d'une cage de laminage 20. Le diamètre de chacun des deux cylindres 21 et 23 est plus élevé sur une portion 9 qu'aux extrémités 25 et 27. Le profilé 1 est en outre encore la­miné par des cylindres verticaux 28 et 29 qui maintiennent les dimensions extérieures du profilé 1.For the purpose of manufacturing an I-shaped section in accordance with the invention, said section 1 is passed between two cylinders 21 and 23 arranged in a plane essentially perpendicular to the plane of the core 3 and forming part of a cage. rolling 20. The diameter of each of the two cylinders 21 and 23 is greater on a portion 9 than at the ends 25 and 27. The profile 1 is further further laminated by vertical cylinders 28 and 29 which maintain the external dimensions of the profile 1.

En faisant passer un profilé 1 laminé jusqu'à un stade proche de la finition dans cette cage, les dimen­sions hors tout du profilé doivent être maintenues. Le retrécissement local de l'âme provoque un surplus de ma­tière tout en empêchant un fluage des semelles. Ce surplus de matière crée des tensions et une ondulation de la por­tion 9 de l'âme réparties localement sur l'âme 11.By passing a rolled profile 1 to a stage close to finishing in this cage, the overall dimensions of the profile must be maintained. The local shrinkage of the core causes an excess of material while preventing creep of the soles. This excess material creates tensions and an undulation of the portion 9 of the core distributed locally over the core 11.

Le profilé ainsi obtenu peut ensuite passer dans une dresseuse 31 par exemple équipée de galets dresseurs 33 à 38 disposés de manière connue en soi pour rendre droit le profilé laminé.The profile thus obtained can then pass through a straightener 31, for example equipped with straightening rollers 33 to 38 arranged in a manner known per se to make the laminated profile straight.

Selon la présente invention, ladite cage dres­seuse comporte deux galets 41 et 43 qui sont disposés dans un plan 39 essentiellement perpendiculaire au plan de dé­filement du profilé 1 et qui présentent une surface rainu­rée dans le sens axial, s'adaptant l'une à l'autre à la manière d'un engrenage en ne s'égrènant que légèrement de manière à réaliser un pliage (figure 3).According to the present invention, said dressing cage comprises two rollers 41 and 43 which are arranged in a plane 39 essentially perpendicular to the plane of travel of the profile 1 and which have a surface grooved in the axial direction, one adapting to the another in the manner of a gear, only slightly breaking apart so as to produce a folding (FIG. 3).

A cette étape, la surlongueur créée préalable­ment entre les cylindres 21 et 23 est utilisée pour former l'ondulation désirée et neutraliser en quelque sorte les tensions préalablement créées.At this stage, the extra length previously created between the cylinders 21 and 23 is used to form the desired ripple and somehow neutralize the tensions previously created.

On obtient ainsi un profilé laminé d'une seule pièce en I à âme ondulée qui présente de très bonnes pro­priétés mécaniques et peu de tensions internes. Les con­traintes d'écrouissage sont particulièrement réduites; comme on peut le voir à la figure 3 où le pliage implique des tronçons courbes 45 et même des tronçons linéaires 47 essentiellement sans contrainte.A rolled profile of a single I-shaped piece with corrugated core is thus obtained, which has very good mechanical properties and little internal stress. The hardening stresses are particularly reduced; as can be seen in Figure 3 where the folding involves curved sections 45 and even linear sections 47 essentially without constraint.

Notons encore que l'un des deux galets peut être entraîné en rotation alors que l'autre est libre en rota­tion.Note also that one of the two rollers can be rotated while the other is free to rotate.

Claims (10)

1. Procédé de fabrication d'un profilé laminé comportant une partie ondulée dans le sens longitudinal du profilé, sur une portion de sa hauteur, caractérisé par les étapes opératoires suivantes:
- on procède au laminage classique de manière connue en soi jusqu'à obtention d'une ébauche proche de la fini­tion;
- on fait passer l'ébauche ainsi obtenue entre deux cylin­dres dont l'un au moins présente un diamètre plus élevé sur une portion de sa longueur de manière à y provoquer une surlongueur;
- on procède à une mise en forme par pliage régulier et répété des ondulations obtenues à l'étape précédente.1. Method for manufacturing a laminated profile comprising a corrugated part in the longitudinal direction of the profile, over a portion of its height, characterized by the following operating steps:
- Classic rolling is carried out in a manner known per se until a blank close to the finish is obtained;
- Passing the blank thus obtained between two cylinders, at least one of which has a larger diameter over a portion of its length so as to cause an excess length;
- Shaping is carried out by regular and repeated folding of the undulations obtained in the previous step. 2. Procédé selon la revendication 1 caractérisé en ce que le pourcentage d'allongement supplémentaire à donner à la portion de la partie de profilé est sensible­ment égale au pourcentage de surlongueur de l'ondulation désirée par rapport à la droite.2. Method according to claim 1 characterized in that the percentage of additional elongation to be given to the portion of the profile part is substantially equal to the percentage of excess length of the desired ripple relative to the right. 3. Procédé selon la revendication 1 ou 2 carac­térisé en ce que la mise en forme par pliage est effectué entre deux galets qui sont situés dans un plan essentiel­lement perpendiculaire au sens de défilement du profilé et qui comportent une surface structurée, notamment des galets à surface rainurée ou cannelée dans le sens axial sur une longueur correspondant essentiellement à la partie de plus grand diamètre du galet ou cylindre de la deuxième étape et, de ce fait, à la portion de hauteur de la partie de profilé qui est ondulée.3. Method according to claim 1 or 2 characterized in that the shaping by folding is carried out between two rollers which are located in a plane essentially perpendicular to the direction of travel of the profile and which have a structured surface, in particular rollers with a surface grooved or grooved in the axial direction over a length essentially corresponding to the portion of the largest diameter of the roller or cylinder of the second step and, therefore, to the height portion of the section portion which is corrugated. 4. Procédé selon la revendication 3 caractérisé en ce que la mise en forme par pliage est effectuée entre deux galets opposés structurés qui ne s'engrènent que lé­gèrement.4. Method according to claim 3 characterized in that the shaping by folding is carried out between two opposite structured rollers which mesh only slightly. 5. Procédé selon l'une quelconque des revendica­tions précédentes caractérisé en ce qu'on effectue l'étape de mise en forme par pliage en même temps qu'un dressage.5. Method according to any one of the preceding claims, characterized in that the shaping step is carried out by folding at the same time as a dressing. 6. Installation pour la fabrication d'un profilé laminé obtenu selon l'une quelconque des revendications 1 à 5, caractérisée en ce qu'elle comporte au moins:
- une installation de laminage classique connue en soi pour le laminage jusqu'à obtention d'une ébauche proche de la finition;
- une cage de laminage comportant deux cylindres (21, 23) qui sont disposés dans un plan essentiellement perpendi­culaire au plan de défilement de la partie (3) de pro­filé (1) à onduler et dont l'un au moins présente un diamètre plus élevé sur une portion de sa longueur (9), ladite cage comportant encore des cylindres verticaux (28, 29) de laminage dudit profilé qui en imposent les dimensions extérieures;
- un dispositif de mise en forme par pliage régulier et répété en continu.6. Installation for the manufacture of a laminated profile obtained according to any one of claims 1 to 5, characterized in that it comprises at least:
- a conventional rolling installation known per se for rolling until a blank close to the finish is obtained;
- a rolling stand comprising two rolls (21, 23) which are arranged in a plane essentially perpendicular to the running plane of the section (3) of profile (1) to be corrugated and at least one of which has a larger diameter over a portion of its length (9), said cage also comprising vertical rolls (28, 29) for rolling said profile which impose its external dimensions;
- a shaping device by regular folding and repeated continuously. 7. Installation selon la revendication 6 carac­térisée en ce que le dispositif de mise en forme par pliage comporte essentiellement deux cylindres ou galets (41, 43) qui sont situés dans un plan essentiellement per­pendiculaire au sens de défilement du profilé et qui com­portent une surface structurée, de préférence rainurée ou cannelée, dans le sens axial sur une longueur axiale correspondant essentiellement à la portion de hauteur de la partie ondulée du profilé à fabriquer.7. Installation according to claim 6 characterized in that the shaping device by folding essentially comprises two cylinders or rollers (41, 43) which are located in a plane essentially perpendicular to the direction of travel of the profile and which have a structured surface , preferably grooved or grooved, in the axial direction over an axial length corresponding essentially to the height portion of the corrugated part of the profile to be manufactured. 8. Installation selon la revendication 7 carac­térisée en ce que les galets ou cylindres structurés oppo­sés (41, 43) ne s'engrènent que légèrement l'un dans l'autre.8. Installation according to claim 7 characterized in that the opposite structured rollers or rollers (41, 43) mesh only slightly one inside the other. 9. Installation selon l'une quelconque des re­vendications 6 à 8 caractérisée en ce que le dispositif de mise en forme par pliage est agencé dans une dresseuse.9. Installation according to any one of claims 6 to 8 characterized in that the shaping device by folding is arranged in a straightener. 10. Installation selon l'une quelconque des re­vendications 6 à 9 caractérisée en ce que l'un des deux galets rainurés, est entrainé en rotation, l'autre étant libre en rotation.10. Installation according to any one of claims 6 to 9 characterized in that one of the two grooved rollers, is rotated, the other being free to rotate.
EP89870077A 1988-06-03 1989-05-30 Method for producing a laminated section comprising a corrugated part, and installation therefor Expired - Lifetime EP0345241B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89870077T ATE73515T1 (en) 1988-06-03 1989-05-30 PROCESS FOR PRODUCTION OF A ROLLED STEEL PROFILE WITH A CORRUGATED PART AND EQUIPMENT DEDICATED TO THIS PROCESS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE8800636 1988-06-03
BE8800636A BE1001122A3 (en) 1988-06-03 1988-06-03 LAMINATE PROFILE COMPRISING A CORRUGATED PART, METHOD FOR THE MANUFACTURE THEREOF AND INSTALLATION FOR THEIR MANUFACTURE.

Publications (3)

Publication Number Publication Date
EP0345241A1 true EP0345241A1 (en) 1989-12-06
EP0345241B1 EP0345241B1 (en) 1992-03-11
EP0345241B2 EP0345241B2 (en) 1996-10-23

Family

ID=3883447

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89870077A Expired - Lifetime EP0345241B2 (en) 1988-06-03 1989-05-30 Method for producing a laminated section comprising a corrugated part, and installation therefor

Country Status (7)

Country Link
US (1) US4967581A (en)
EP (1) EP0345241B2 (en)
AT (1) ATE73515T1 (en)
BE (1) BE1001122A3 (en)
CA (1) CA1313315C (en)
DE (1) DE68900960D1 (en)
ES (1) ES2029566T5 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10246164B4 (en) * 2002-10-02 2014-03-20 Benteler Automobiltechnik Gmbh Method for producing structural components
US6834525B2 (en) * 2002-11-18 2004-12-28 The Boeing Company Adjustable corrugation apparatus and method
US20070046428A1 (en) * 2005-08-24 2007-03-01 Wayne-Dalton Corporation System and methods for automatically moving access barriers initiated by mobile transmitter devices
US7327108B2 (en) * 2005-08-24 2008-02-05 Wayne-Dalton Corp. System and methods for automatically moving access barriers initiated by mobile transmitter devices
US7327107B2 (en) * 2005-08-24 2008-02-05 Wayne-Dalton Corp. System and methods for automatically moving access barriers initiated by mobile transmitter devices
US8058970B2 (en) * 2005-08-24 2011-11-15 Homerun Holdings Corporation System and methods for automatically moving access barriers initiated by mobile transmitter devices
US7642481B2 (en) * 2006-08-15 2010-01-05 The Boeing Company Apparatus and method for forming corrugated members
US7958763B2 (en) * 2006-08-24 2011-06-14 Ltc Roll & Engineering Co. Apparatus and process for reducing profile variations in sheet metal stock
KR101620936B1 (en) * 2011-05-13 2016-05-13 만스타에트 게엠베하 Method and apparatus for producing metal sections with a closely toleranced chamber dimension

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR744933A (en) * 1933-04-27
DE2447554A1 (en) * 1974-10-02 1976-04-08 Mannesmann Ag Tube straightening machine with deforming rolls - imposes additional elliptical deformation on tube for increasing rate of straightening
US4251973A (en) * 1980-04-07 1981-02-24 Paik Young J I-Beam construction and process therefor
LU83044A1 (en) * 1980-05-09 1981-03-27 Sumitomo Metal Ind METHOD FOR MANUFACTURING A BEAM IN I COMPRISING A CENTRAL CORRUGATED CORE AND CYLINDERS FOR THE MANUFACTURE OF THIS BEAM
AT368725B (en) * 1981-01-30 1982-11-10 Evg Entwicklung Verwert Ges COMBINED LEVELING AND BENDING MACHINE

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1106172A (en) * 1914-05-02 1914-08-04 Johann Martin Wetcke Rolling-mill for sheet metal.
CA1150986A (en) * 1979-08-24 1983-08-02 Masami Hamada Method for producing i-beam having centrally corrugated web and rolls for producing such i-beam
JPS58107222A (en) * 1981-12-21 1983-06-25 Hitachi Ltd Method for forming crease in part of band plate
JPS5916844A (en) * 1982-07-21 1984-01-28 Asahi Chem Ind Co Ltd Novel optically active compound

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR744933A (en) * 1933-04-27
DE2447554A1 (en) * 1974-10-02 1976-04-08 Mannesmann Ag Tube straightening machine with deforming rolls - imposes additional elliptical deformation on tube for increasing rate of straightening
US4251973A (en) * 1980-04-07 1981-02-24 Paik Young J I-Beam construction and process therefor
LU83044A1 (en) * 1980-05-09 1981-03-27 Sumitomo Metal Ind METHOD FOR MANUFACTURING A BEAM IN I COMPRISING A CENTRAL CORRUGATED CORE AND CYLINDERS FOR THE MANUFACTURE OF THIS BEAM
AT368725B (en) * 1981-01-30 1982-11-10 Evg Entwicklung Verwert Ges COMBINED LEVELING AND BENDING MACHINE

Also Published As

Publication number Publication date
BE1001122A3 (en) 1989-07-25
EP0345241B2 (en) 1996-10-23
EP0345241B1 (en) 1992-03-11
DE68900960D1 (en) 1992-04-16
ATE73515T1 (en) 1992-03-15
ES2029566T5 (en) 1997-01-01
CA1313315C (en) 1993-02-02
ES2029566T3 (en) 1992-08-16
US4967581A (en) 1990-11-06

Similar Documents

Publication Publication Date Title
EP0345241B1 (en) Method for producing a laminated section comprising a corrugated part, and installation therefor
FR2501085A1 (en) PROCESS FOR LAMINATION OF SLABS TO PRODUCE BLANKS OF POULTRY AND CANNED CYLINDER FOR ITS IMPLEMENTATION
EP0056776B1 (en) Method of manufacturing hollow one-piece axle blanks, and axle blanks obtained
EP1355791B1 (en) Steel plate wheel rim with optimised profile
FR2529485A1 (en) METHOD FOR CHANGING THE WIDTH DISTRIBUTION OF THE THICKNESS OF A METAL STRIP
CA2775365A1 (en) Metal profile member to be used as a formwork assisting in the construction of metal/concrete flooring
EP0399910A1 (en) Ribbed concrete steel with high adherence and its processing production
EP1190148A1 (en) Beam structure and method for producing such structures
EP0839593B1 (en) Method of making a hollow revolution part by fluoturning
FR2857302A1 (en) Steel transversal beam for torsion bars rear axle of motor vehicle, has two branches, where one branch has curved long section that is joined to inner surface or outer surface of corresponding branch at sections front side
LU83108A1 (en) PROCESS FOR MANUFACTURING H-PROFILE PILING
FR2712832A1 (en) Method of manufacturing a transport vehicle spar and spar obtained by this process.
WO2020104755A1 (en) Stabilizing bar for a vehicle
FR2842142A1 (en) TIRE FOR HEAVY VEHICLES
EP1192016A1 (en) Method for assembling at least two component metal elements for producing a structure
FR2482256A1 (en) PROCESS FOR PRODUCING I-BEAM HAVING A CENTRALLY WAVED SOUL AND CYLINDERS FOR USE THEREIN
EP1525329A2 (en) Light alloy profiled member to be joined to another profiled member by clipping
FR2805479A1 (en) Method of fabrication of cross member in motor vehicle chassis involves pressing round section tube between V-shaped punch and die
FR2745215A1 (en) METHOD FOR PRODUCING A VEHICLE PAVILION, VEHICLE PAVILION AND VEHICLE COMPRISING SUCH A PAVILION
FR2696956A1 (en) Rolling tool for rolling cold pilgrim tubes.
BE892468A (en) Fabrication of wire-like elements from sheet metal - involves passing sheet through succession pairs of fluted rollers before shearing
FR3110493A1 (en) Stabilizer bar for vehicle with non-circular hollow cross-section
FR2761006A1 (en) Stainless steel wheel for an automobile
BE702135A (en)
BE887372A (en) PROCESS FOR MANUFACTURING H-PROFILE PILING

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT CH DE ES FR GB GR IT LI LU NL SE

17P Request for examination filed

Effective date: 19900411

17Q First examination report despatched

Effective date: 19910115

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT CH DE ES FR GB GR IT LI LU NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19920311

Ref country code: NL

Effective date: 19920311

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19920311

Ref country code: GB

Effective date: 19920311

Ref country code: AT

Effective date: 19920311

REF Corresponds to:

Ref document number: 73515

Country of ref document: AT

Date of ref document: 19920315

Kind code of ref document: T

REF Corresponds to:

Ref document number: 68900960

Country of ref document: DE

Date of ref document: 19920416

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19920531

Ref country code: LI

Effective date: 19920531

Ref country code: CH

Effective date: 19920531

ITF It: translation for a ep patent filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2029566

Country of ref document: ES

Kind code of ref document: T5

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]
PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19930129

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19930202

26 Opposition filed

Opponent name: PLANNJA AB, FACK

Effective date: 19921209

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: PROFILARBED S.A.

PLAW Interlocutory decision in opposition

Free format text: ORIGINAL CODE: EPIDOS IDOP

PLAW Interlocutory decision in opposition

Free format text: ORIGINAL CODE: EPIDOS IDOP

PLAW Interlocutory decision in opposition

Free format text: ORIGINAL CODE: EPIDOS IDOP

PUAH Patent maintained in amended form

Free format text: ORIGINAL CODE: 0009272

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT MAINTAINED AS AMENDED

27A Patent maintained in amended form

Effective date: 19961023

AK Designated contracting states

Kind code of ref document: B2

Designated state(s): AT CH DE ES FR GB GR IT LI LU NL SE

REG Reference to a national code

Ref country code: CH

Ref legal event code: AEN

Free format text: MAINTIEN DU BREVET DONT L'ETENDUE A ETE MODIFIEE

ITF It: translation for a ep patent filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: DC2A

Kind code of ref document: T5

Effective date: 19961128

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 19970505

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 19980601

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20000201

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050530