EP3068558B1 - Procédé de production d'un profilé en acier, en particulier d'une poutre en acier - Google Patents

Procédé de production d'un profilé en acier, en particulier d'une poutre en acier Download PDF

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Publication number
EP3068558B1
EP3068558B1 EP14796081.9A EP14796081A EP3068558B1 EP 3068558 B1 EP3068558 B1 EP 3068558B1 EP 14796081 A EP14796081 A EP 14796081A EP 3068558 B1 EP3068558 B1 EP 3068558B1
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EP
European Patent Office
Prior art keywords
wall section
steel
section
recess
metal workpiece
Prior art date
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EP14796081.9A
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German (de)
English (en)
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EP3068558A1 (fr
Inventor
Achim WÜNSCH
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Origami Steel Corp
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Origami Steel Corp
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Publication of EP3068558A1 publication Critical patent/EP3068558A1/fr
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    • 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
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/03—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal otherwise than by folding
    • B21D39/037—Interlocking butt joints
    • 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
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/10—Bending specially adapted to produce specific articles, e.g. leaf springs
    • 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
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/52—Making hollow objects characterised by the use of the objects boxes, cigarette cases, or the like

Definitions

  • the invention lies in the field of steel processing and steel production, in particular the production of steel beams.
  • the invention relates to a method for producing a steel beam, which comprises the steps: providing a metal workpiece, in particular a strip steel workpiece, which preferably has a thickness of at least 5 mm, forming a weakening in the area of an intended bend in the metal workpiece and bending the metal workpiece to create a bend in the metal workpiece.
  • the invention also relates to a steel beam.
  • this object is achieved by a method for producing a steel beam according to claim 1 .
  • the invention is based on the finding that the known methods for producing steel beams have several disadvantages.
  • the known methods for producing steel profiles are energy-intensive, labor-intensive and associated with high set-up and start-up costs. This results in high minimum order quantities and comparatively long delivery times, so far-sighted production planning and high stock levels are necessary in order to be able to react flexibly to customer orders.
  • An advantage of the method according to the invention lies in the fact that an autonomous, flexible and fully automatic production of steel profiles, preferably directly from a coil or a strip steel roll or starting from flat steel workpieces, is made possible.
  • production costs are kept low by comparatively low set-up costs, low labor costs and low material loss.
  • the needs-based and timely production achieved when using the process also enables low storage costs.
  • the process is also energy-efficient, clean and environmentally friendly. Energy is saved in particular when processing thick-walled steel.
  • Another essential advantage of the invention is that steel beams can be manufactured with great precision.
  • the formation of the weakening means that the behavior of the workpiece when bending can be predicted.
  • a closed steel profile is created, which can be used as a steel beam.
  • the present invention also includes the finding that the steel girders of the present invention, which are preferably designed as hollow steel profiles, offer the right cross-section for every load case.
  • the standard industry requirements in particular those under the English terms “made to measure (load)” (in German: manufactured for the load case / tailor-made) and “mass customization " (in German: customer-specific mass production) known requirements are met.
  • the present invention includes the finding that the steel beams according to the invention, which are preferably designed as steel hollow profiles, in particular the essentially square steel hollow profiles, give the architect more freedom in design due to their narrow outer radii, since, for example, profiles lying flat on one another only have relatively narrow joints.
  • the present invention also includes the finding that the sharp-edged inner edges of a steel girder, preferably designed as a steel hollow profile and more preferably as a square steel hollow profile, allow precisely fitting inserts such as connecting elements to be produced with relatively little effort.
  • the metal workpiece is preferably formed from a steel strip workpiece.
  • the weakening of the workpiece preferably runs along an intended bend in the workpiece. More preferably, the weakening is formed by forming a recess in the workpiece. This represents a particularly expedient and simple variant for forming a weakening in the area of an intended bend in the workpiece.
  • the term notch is to be understood as meaning a recess which is formed in the workpiece in such a way that it has an open end, in particular directed to a bend inside.
  • the weakening after the bending is particularly preferably increased by welding, in particular laser welding, preferably by a laser hybrid welding method.
  • welding preferably serves to completely close a recess that is partially closed during bending. In this case, for example, abutting ends of the recess of the workpiece can be undetachably connected by welding.
  • laser welding is to be understood as meaning the non-detachable connection of two ends of a steel profile using an optically focused laser beam with high intensity.
  • the welding is carried out by means of a focused laser beam, which is directed from the outside of the workpiece to the inside of the bend, in particular along a zero gap formed by the recess after bending, the focus of which is preferably within the workpiece.
  • a focused laser beam which is directed from the outside of the workpiece to the inside of the bend, in particular along a zero gap formed by the recess after bending, the focus of which is preferably within the workpiece.
  • the term zero gap is to be understood in such a way that the legs of the recess lie against one another after bending, e.g. B. have contact without forming a chemical bond.
  • welding is from the bend outside of the workpiece to the The inside of the bend as well as from the inside of the bend to the outside of the bend is possible regardless of the bend angle.
  • a recess forming the weakening is provided in the workpiece, with the recess formed on a bent inner side of the workpiece being closed by welding, in particular laser welding, after bending.
  • the bending is preferably carried out by free bending, swivel bending or die bending. More preferably, the workpiece is provided by unrolling a steel strip roll, in particular a coil.
  • a steel strip roll in particular a coil.
  • the term coil is to be understood as meaning a coiled-up metal strip, for example in the form of a steel strip roll.
  • a recess is preferably made in a workpiece, which is designed as a strip steel blank, before bending, which recess is aligned transversely to the longitudinal direction of the strip steel blank and is open to a lateral boundary of the strip steel blank.
  • the recess can be formed, for example, as a slit-like recess, which is introduced laterally into the strip steel blank, for example by means of a punching tool, a high-energy laser beam or a steel saw.
  • the longitudinal direction of the strip steel blank is preferably the direction in which the strip steel blank moves during the manufacturing process, for example on a conveyor belt or a roller conveyor. In particular, this can also be the direction in which a steel strip unwound from a steel strip roll is fed to the assembly line.
  • the recesses make it possible for work steps in the manufacturing process to be carried out in a first area of the strip steel blank without this having an effect on a second portion of the strip steel blank separated from the first portion by the recess. More preferably, the recess protrudes into the strip steel blank such that a bending moment in a first region of the strip steel blank, which delimits a first section of the recess, is not transferred to a second region of the strip steel blank, which delimits a second section of the recess. This achieves a considerable simplification of the manufacturing process of a steel profile when using strip steel blanks.
  • the bends carried out according to the method according to the invention can be made without there being a need to completely separate individual sections of the strip steel blank from one another before bending.
  • the recesses are each made with a specified depth in the strip steel blank in such a way that a bending moment in a first area of the strip steel blank is not transferred to a second area of the strip steel blank, but the two areas nevertheless remain connected in a specified section of the strip steel blank.
  • the first area of the strip steel blank is located, for example, in a bending device, so that the workpiece can be bent therein.
  • the recess serves to ensure that the bending is not transferred to a second area of the strip steel blank, which is still located in the weakening device, for example.
  • the weakening in particular a recess forming the weakening, is formed by milling.
  • milling it has been shown that problems occur during bending in the case of a recess formed by rolling or embossing. Because, for example, when rolling a recess, material shifts occur that can lead to the workpiece breaking during bending. In contrast, when milling, areas of the workpiece surrounding the recess are not or only slightly affected.
  • a recess forming the weakening has a W-shaped area before bending.
  • the W-shaped portion is formed in a central portion of the recess as viewed in a longitudinal direction of the workpiece.
  • Two inner legs of the W-shaped area are preferably aligned at an angle of approximately 90° to one another.
  • a first beveled area follows the ends of the W-shaped area.
  • two legs of the beveled area are preferably aligned at an angle of approximately 50° to 110°, in particular approximately 90°, to one another.
  • the first beveled area transitions into a second beveled area, which preferably has a larger opening angle than the first beveled area.
  • Two legs of the second beveled area preferably form the opening angle. Therefore, the two legs of the second beveled area are aligned at an angle to one another which is greater than the angle between the two legs of the first beveled area, in particular greater than 90°, particularly preferably about 122°.
  • the wording “transition into” is to be understood as a direct or indirect transition.
  • the first beveled area preferably merges indirectly, in particular by means of a step, into the second beveled area.
  • the penetration depth of the weld can advantageously also be influenced by the U-shaped gap described above. Depending on the power of the laser beam source, it is thus possible to advantageously define the welding depth or component thickness in the edges via the U-shaped gap.
  • the U-shaped gap can also be used to prepare the weld seam for another weld, for example MIG (metal inert gas welding), MAG (metal active gas welding), MSG (metal inert gas welding) or laser hybrid welding, which is then carried out from the inside is executed here.
  • a curved recess section adjoins the ends of the W-shaped area of the recess or the ends of the first beveled area of the recess.
  • the two curved recess sections together form a U-shaped gap on a bent inner side of the workpiece, which serves as protection against corrosion.
  • the curved recess portions extend from the ends of the W-shaped portion or from the Ends of the legs of the beveled area of the recess initially with a large curvature, which steadily decreases towards the end of the recess section.
  • steps b) and c) are carried out twice or four times, respectively, in order to provide a triangular or quadrangular support structure by step c).
  • a first beveled area adjoins the ends of the W-shaped area of the recess.
  • the first beveled area transitions into a second beveled area, which preferably has a larger opening angle than the first beveled area.
  • a further preferred embodiment of the steel profile comprises a first wall section, a second wall section, which extends from a first end of the first wall section and is oriented at an angle in the range of 30° to 150° to the first wall section, and a third wall section, extending from a second end of the first wall section and oriented at an angle in the range of 30° to 150° to the first wall section, an end of the first wall section and an end of the second wall section abutting for bonding.
  • This embodiment preferably achieves a steel beam that is essentially triangular in cross section. More preferably, the angle between the first and second wall section and the angle between the first and third wall section is approximately 60°, in particular in the case of an embodiment with an equilateral triangular cross section.
  • the steel profile comprises a first, second and third wall section, wherein the second and third wall section each extend from the first wall section and are oriented at an angle of approximately 90° to the first wall section, a first connecting section which extends extending from the second wall portion and oriented at an angle of about 90° to the second wall portion, and a second connecting portion extending from the third wall portion and oriented at an angle of about 90° to the third wall portion, one end of the first connection portion and an end of the second connection portion abut each other for connection.
  • the two connecting sections preferably form a fourth wall of the steel profile, which is aligned at an angle of approximately 90° to the second and third wall section. Seen in cross section, the steel profile is preferably closed and rectangular in shape. More preferably, the abutting ends of the second connecting portion are connected to each other by welding.
  • the end of the first connecting section has at least one groove, with the end of the second connecting section having at least one tongue which is designed to correspond to the groove.
  • the tongue and groove connection is preferably formed along the longitudinal extension of the steel profile. More preferably, after bending the metal workpiece, the ends of the connecting portions are connected to each other by welding.
  • the first and second connection sections are connected to one another by means of at least one dovetail connection.
  • an essentially approximately dovetail-shaped spring of the first connecting section preferably engages in a corresponding recess of the second connecting section.
  • a dovetail joint or a dovetail joint is preferably cut using laser beams, while a tongue and groove joint is preferably milled.
  • Figures 1, 2 and 3 show a side view, top view and perspective view of a metal workpiece in an intermediate state after it has been provided in a first method step A in the form of a strip steel workpiece with a thickness of at least 5 mm and after in a second method step B Recesses 3, 5, 7 and 9 were formed by milling in the area of an intended bend in the metal workpiece 1.
  • Figures 4, 5 and 6 show that in the Figures 1, 2 and 3 shown metal workpiece in a second intermediate state, after the metal workpiece 1 was bent four times in a method step C, namely in each case in the area of the recesses 3, 5, 7 and 9.
  • the metal workpiece 1 has a first wall section 11, a second wall section 13 and a third wall section 15.
  • the second and third wall sections 13 and 15 extend from the first wall section 11 and are aligned at an angle of 90° to the first wall section 11 .
  • the metal workpiece 1 also has a first connecting section 17 which extends from the second wall section 13 and is aligned at an angle of 90° to the second wall section 13 .
  • the metal workpiece 1 in the second intermediate state has a second connecting section 19 which extends from the third wall section 15 and is aligned at an angle of approximately 90° to the third wall section 15 .
  • the ends of the first connection portion 17 and second connection portion 19 abut each other for connection.
  • the second connecting section 19 has a spring 21 which is designed in the shape of a dovetail.
  • the first connecting section 17 has a groove 23 designed to correspond to the spring.
  • Figures 7, 8 and 9 Figure 13 shows a portion of a metal workpiece 1 in an intermediate state in which the recess 9 is shown prior to bending while the tongue 21 and groove 23 are engaged.
  • the Figures 7, 8 and 9 serve to illustrate preferred angular dimensions of the metal workpiece.
  • the tongue 21 and groove 23 only engage when the metal workpiece 1 is bent in the area of the recesses 3 and 9 .
  • the recess 9 is in the viewing direction 7 viewed mirror-symmetrically to an axis 12 formed.
  • the recess 9 has a W-shaped area 31 arranged mirror-symmetrically to the axis 12 and a first beveled area 33 .
  • the first beveled area 33 merges into a second beveled area 35 via a step 34 .
  • the W-shaped portion 31 and the first tapered portion 33 each form a zero gap.
  • the second tapered portion 35 forms a U-shaped groove after bending.
  • Two legs 37 forming the first beveled portion 33 are oriented at an angle of about 90° to each other prior to bending C.
  • Two legs 39 forming the second beveled portion 35 are oriented at an angle of about 122° to each other prior to bending.
  • the tongue 21 and groove 23 are essentially designed to correspond to one another.
  • the tongue 21 and the groove 23 are essentially in a form-fitting manner.
  • the groove 23 is beveled, so that a channel 55 is formed in a transition region between the tongue 21 and the groove 23.
  • the channel 55 is preferably used on the one hand as a clearance via which the opposite leg is restricted and on the other hand preferably as a weld seam preparation for the subsequent welding or the butt joint with additional material, preferably for example by means of a laser hybrid welding process.
  • Two inner legs of the W-shaped portion 65 are aligned at an angle of approximately 90° to one another before the metal workpiece 61 is bent.
  • Two legs of the beveled portion 67 are oriented at an angle of about 90° to each other prior to bending the metal workpiece 61 .
  • Figure 19a shows a cross-section of a plate (10 mm thick) of a square hollow steel body as it is produced by the method according to the invention.
  • the Figure 19b shows an enlarged section A of Figure 19a .
  • the Figure 19c shows a representation of a circuit board based on the Figures 19a and 19b finished folded workpiece according to the present invention.
  • Figure 20a shows a further variant of a cross section of a plate according to the invention (here 20 mm thick) of a square hollow steel body according to the invention.
  • the board material shown is therefore a stronger board material.
  • 28.28 mm of steel would have to be welded through at an angle of 90°.
  • seams welded with the help of laser beams can no longer be produced economically above a welding depth of 16 mm.
  • Figure 21a shows an embodiment of a profile folded according to the invention with a plate thickness of 10 mm, which profile is butt-connected to a puzzle latch according to FIG. 21d, which latch was designed for a laser hybrid butt weld/HV.
  • the invention has recognized that to fold the puzzle latch according to Figure 19b and also Figure 19c a phase is necessary. Without this phase, based on the knowledge of the invention, the side parts cannot be latched or pivoted in the last step, see also the "flower" described below.
  • the profile edges of this embodiment according to the invention are each preferably welded through from the outside with laser beam welding.
  • Figure 22a shows another embodiment according to the invention of a folded profile with a blank thickness of 10 mm, which profile was laid out in the joint with a preparation for a butt joint in I-seam form.
  • the profile edges of this embodiment are preferably each welded through with a laser beam weld from the outside.
  • the Figures 24a, 24b and 24c show different views of an embodiment of a profile according to the invention with a plate material thickness of about 20 mm, which profile was prepared in the butt joint for a laser hybrid butt weld/HV (half V seam).
  • the particular notch geometry according to the invention which should again be described as preferred, as in relation to FIG Figures 20a, 20b and 20c has already been described in detail above, with an additional taper, advantageously and according to the invention ensures a weldable seam area in the corners.
  • the profile edges of this embodiment of the invention are preferably each welded through with laser beam welding from the outside.
  • Figures 25a, 25b, 25c, 25d, 25e and 25f 12 shows embodiments according to the invention of design possibilities according to the invention for the fold, which are possible using the system according to the invention described in the present patent application. While showing Figure 25a an embodiment forming an angle, Figure 25b an embodiment forming a U-steel, Figure 25c an embodiment forming a rectangular hollow profile, Figure 25d an embodiment forming a triangular hollow profile, Figure 25e an embodiment forming a square hollow profile and Figure 25f an embodiment of the present invention forming a hexagonal hollow section.
  • Figures 26a, 26b, 26c, 26d, 26e and 26f show the in the Figures 25a, 25b, 25c, 25d, 25e and 25f illustrated embodiments of inventive profiles, each in a perspective view.
  • Figures 27a, 27b, 27c, 27d, 27e and 27f show, in the sequence mentioned above, an embodiment of a bending sequence according to the invention in the production of a substantially square hollow column.
  • the figure 28 shows in the order of the letters a to q an embodiment of a manufacturing process according to the invention based on the board used and the tools used.
  • Step a shows the laser cutting
  • step b the further transport to step c, step c the edge milling
  • step d the joint milling
  • step e the joint milling
  • step f the joint milling
  • step g the joint milling
  • step h the further transport to step i
  • the laser beam welding step n the laser beam welding step o the laser beam welding step p the laser beam welding
  • step q the laser beam welding wherein in step a the laser to the laser cutter is shown schematically, wherein in steps c to g the milling device is shown schematically in each case, and wherein in steps m to q the laser for laser beam welding is also shown schematically in each case.
  • figure 29 shows a study by the company "IWF Ingenieur defeat Uwe generalmann” from August 26, 2013, in which profiles of the prior art were compared with embodiments of the invention using the finite element method.
  • the present invention includes the findings of pages 1 to 16 of figure 29 .
  • a square "HSS column” according to the invention was calculated in comparison with a commercially available product.
  • Commercially available products are, in particular, such as are shown, for example, at the in 30 illustrated page 2 of the brochure published by "Steeltube Institute of Northamerica” entitled “Hollow structural sections, column load tables” in July 1997.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laser Beam Processing (AREA)
  • Rod-Shaped Construction Members (AREA)

Claims (12)

  1. Procédé de fabrication d'une poutre métallique, comprenant les étapes de :
    a) préparation d'une pièce métallique (1 ; 61), en particulier d'une pièce en feuillard d'acier, laquelle comporte de préférence une épaisseur d'au moins 5 mm,
    b) formation d'un affaiblissement dans la zone d'un pliage prévu de la pièce métallique (1, 61) ;
    c) pliage de la pièce métallique (1, ;61) pour produire un pliage sur la pièce métallique (1 ; 61),
    caractérisé par l'étape de :
    d) liaison de deux zones de bordure de la pièce métallique pliée (1 ; 61), sachant qu'un évidement (3 ; 5 ; 7 ; 9 ; 63) formant l'affaiblissement comporte avant le pliage (C) une zone en forme de W (31 ; 65).
  2. Procédé selon la revendication 1,
    sachant que la formation de l'affaiblissement, en particulier d'un évidement (3 ; 5 ; 7 ; 9 ; 63)formant l'affaiblissement, a lieu par fraisage.
  3. Procédé selon l'une quelconque des revendications précédentes,
    sachant qu'une première zone chanfreinée (33 ; 67) se raccorde aux extrémités de la zone en forme de W (31 ; 65) .
  4. Procédé selon la revendication 3,
    sachant que la première zone chanfreinée (33) passe dans une deuxième zone chanfreinée (35), laquelle comporte de préférence un angle d'ouverture plus grand que la première zone chanfreinée (33).
  5. Procédé selon l'une quelconque des revendications précédentes,
    sachant que les étapes b) et c) sont exécutées deux fois ou quatre fois afin de pouvoir disposer par l'étape c) d'une structure de poutre triangulaire ou rectangulaire.
  6. Poutre métallique composée d'une pièce métallique (1 ; 61), en particulier d'une pièce en feuillard d'acier, laquelle comporte de préférence une épaisseur d'au moins 5 mm, dotée d'un affaiblissement dans la zone d'un pliage de la pièce métallique (1 ;61), caractérisée en ce que les deux zones de bordure de la pièce métallique pliée (1 ; 61) sont reliées, sachant qu'un évidement (3 ; 5 ; 7 ; 9 ; 63) formant l'affaiblissement comporte une zone en forme de W (31 ; 65) avant le pliage (C).
  7. Poutre métallique selon la revendication 6,
    sachant qu'une première zone chanfreinée (33 ; 67) se raccorde aux extrémités de la zone en forme de W (31 ; 65) de l'évidement (3 ; 5 ; 7 ; 9 ; 63).
  8. Poutre métallique selon la revendication 7,
    sachant que la première zone chanfreinée (33) passe dans une deuxième zone chanfreinée (35), laquelle comporte de préférence un angle d'ouverture plus grand que la première zone chanfreinée (33).
  9. Poutre métallique selon l'une quelconque des revendications 6-8, comprenant
    - une première section de paroi,
    - une deuxième section de paroi, laquelle s'étend depuis une première extrémité de la première section de paroi et est orientée dans un angle d'une plage allant de 30° à 150° vers la première section de paroi, et
    - une troisième section de paroi, laquelle s'étend depuis une deuxième extrémité de la première section de paroi et est orientée dans un angle d'une plage allant de 30° à 150° vers la première section de paroi,
    sachant qu'une extrémité de la première section de paroi et une extrémité de la deuxième section de paroi sont l'une contre l'autre pour raccordement.
  10. Poutre métallique selon l'une quelconque des revendications 1-8, comprenant
    - une première (11, une deuxième (13) et une troisième section de paroi (15), sachant que la deuxième (13) et la troisième section de paroi (15) s'étendent respectivement depuis la première section de paroi (11) et sont orientées dans un angle d'environ 90° vers la première section de paroi (11) et
    - une première section de liaison (17), laquelle s'étend depuis la deuxième section de paroi (13) et est orientée dans un angle d'environ 90° vers la deuxième section de paroi (13) et
    - une deuxième section de liaison (19), laquelle s'étend depuis la troisième section de paroi (15) et est orientée dans un angle d'environ 90° vers la troisième section de paroi (15),
    sachant qu'une extrémité de la première section de liaison (17) et une extrémité de la deuxième section de liaison (19) se trouvent l'une contre l'autre pour raccordement.
  11. Poutre métallique selon la revendication 10,
    sachant que l'extrémité de la première section de liaison (17) comporte au moins une rainure (23) et
    sachant que l'extrémité de la deuxième section de liaison (19) comporte au moins un ressort (21), lequel est constitué de façon correspondante à la rainure (23) .
  12. Poutre métallique selon la revendication 10 ou 11,
    sachant que les extrémités de la première (17) et de la deuxième section de liaison (19) sont reliées l'une à l'autre au moins au moyen d'une liaison en queue d'aronde.
EP14796081.9A 2013-11-11 2014-11-07 Procédé de production d'un profilé en acier, en particulier d'une poutre en acier Active EP3068558B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201310222899 DE102013222899A1 (de) 2013-11-11 2013-11-11 Verfahren zur Herstellung eines Stahlprofils, insbesondere eines Stahlträgers
PCT/EP2014/074097 WO2015067780A1 (fr) 2013-11-11 2014-11-07 Procédé de production d'un profilé en acier, en particulier d'une poutre en acier

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Publication Number Publication Date
EP3068558A1 EP3068558A1 (fr) 2016-09-21
EP3068558B1 true EP3068558B1 (fr) 2022-11-02

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DE (1) DE102013222899A1 (fr)
WO (1) WO2015067780A1 (fr)

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