EP2552616B1 - Procédé pour former une ébauche sensiblement plane pour donner un corps en cuvette, et son utilisation - Google Patents

Procédé pour former une ébauche sensiblement plane pour donner un corps en cuvette, et son utilisation Download PDF

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Publication number
EP2552616B1
EP2552616B1 EP11717473.0A EP11717473A EP2552616B1 EP 2552616 B1 EP2552616 B1 EP 2552616B1 EP 11717473 A EP11717473 A EP 11717473A EP 2552616 B1 EP2552616 B1 EP 2552616B1
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EP
European Patent Office
Prior art keywords
deformed
blank
buckling
flat
surfaced
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Not-in-force
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EP11717473.0A
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German (de)
English (en)
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EP2552616A1 (fr
Inventor
Wulf Radtke
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MT Aerospace AG
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MT Aerospace AG
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Publication of EP2552616A1 publication Critical patent/EP2552616A1/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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/14—Spinning
    • B21D22/18—Spinning using tools guided to produce the required profile
    • B21D22/185—Spinning using tools guided to produce the required profile making domed objects

Definitions

  • the present invention relates to a method for forming a substantially planar blank into a shell body and its use.
  • the US 3,979,815 describes a method of forming metal plates that have poor ductility. Therefore, cover plates are used for the deformation, which have better deformability and enclose the plates to be deformed during deformation for protection against the influence of heat.
  • the present invention is therefore based on the object to provide a method for forming a substantially planar blank to a shell body, with which can avoid the above drawbacks, which thus transforming a substantially planar blank to a shell body while avoiding Wrinkling easy, at the same time without effort and thus particularly cost-effective, and to provide its use.
  • planar blank and the at least one planar beulstabile supplement each of which is substantially circular or disc-shaped or each formed as a partial annulus, according to claim 3 from the planar blank and At least one planar Beulstabil garnish by cutting, in particular by mechanical cutting, cutting by laser or water jet, sawing, milling or eroding, the planar blank and the at least one planar Beulstabils supplement are worked out.
  • a procedure is proposed, which leads to a high efficiency by an improved utilization of existing heat and power potentials to a significant reduction of energy costs and a concomitant saving of time.
  • the truncated conical blank is already clearly approximated to the shell body in comparison to a planar circular or disc-shaped blank.
  • the required degree of deformation compared to the forming of a planar circular blank considerably reduced and thus restrictions on forming, such as material failure in the base material and in the particularly fail-critical welding area, or wrinkling, avoided or at least substantially reduced.
  • This in turn allows the production of shell bodies with a much larger ratio of axial length and diameter than before.
  • An additional advantage is that the shell body can be made in relation to their diameter thin-walled and therefore less material use and lighter than previously possible due to wrinkling.
  • the method according to the invention makes it possible to dispense with individual or even several production steps that were previously required when forming a flat circular blank. For example, up to 95% of the production steps in previous forming can be eliminated. This allows the benefits of a significant reduction in manufacturing costs, a higher component throughput and improved overall economy. At the same time a very large dimensional and dimensional accuracy and at the same time high strength of the shell body produced can be obtained.
  • friction stir welding there are significant advantages over conventional welding, especially when the weld / welds then high voltages due to further transformation, such as a concave pressing or spin forming and / or counter-rolling and / or hammering and / or shot peening are subjected ,
  • friction stir welding is particularly advantageous due to the fundamental possibility of working below the melting point, a slight distortion in the weld / welds, excellent mechanical Properties of the weld / welds, no formation of voids, pores and weld spatter, at most very low shrinkage and a favorable repair option.
  • At least one forming or spinning roller and / or one spinning ball, which is then preferably stored hydrostatically, can be used as forming tool.
  • a forming tool may alternatively be provided at least one cooperating the back or outer side of the blank to be deformed and the at least one bulge to be deformed bulge supposing counter-roll and / or at least one hammer and / or balls made of metal, glass or a combination thereof.
  • On the dimensional stability of the blank to be deformed and later shell body during the forming or forming or concave pressing can be influenced by the fact that the front or inside of the blank to be deformed or the at least one bulge-proof supplement to be deformed acting forming tool in a plane radially to the blank to be deformed and the at least one bulge-proof supplement to be deformed two-dimensionally from the center to the periphery of the blank and the at least one bulge-proof supplement, and vice versa, or the circumference in the region of a small opening to the periphery in the area large opening of the blank and the at least one bulge-proof supplement, and vice versa, is performed.
  • By such optionally optionally changing leadership can be significantly shorter travel paths of the forming tool reach.
  • the spatial movement of the at least one forming tool relative to the blank in the form of a spatial spiral on the surface or inside of the frusto-conical blank from inside to outside or vice versa from outside to inside, leading to the desired geometry of the shell body.
  • the spiral shape results from the superposition of the radial two-dimensional movement with the rotation of the frustoconical blank as the third dimension.
  • a relative movement between the blank and the forming tool can also be carried out step by step with respectively adjusted setting and in any desired combinations of the respective basic movements in order to produce a desired geometry.
  • the shaping tool acting on the front or inside of the blank to be deformed and the at least one bulge-proof insert to be deformed is controlled and / or controlled by means of a template or numerically.
  • the final geometry of the shell body can be defined by the meridian curve of a (sheet metal) template or by programming the meridian curve of the (sheet metal) template into an NC control. Subsequent changes in geometry or geometry adjustments for differently shaped shell body are possible without high time, personnel and thus cost, after only the template or the NC control must be changed for the forming tool.
  • the blank to be deformed and the at least one beulstabile shim to be deformed and the at least one forming tool in the deformation to the shell body according to claim 7 are moved relative to each other, in particular rotated. This can be done by the movement of the forming tool and / or provided for the movement of the forming additional relative movement or relative rotation of deforming blank and bulge-proof supplement or the support structure or the chamber of the support structure itself.
  • the blank to be deformed according to claim 8 via at least one of the support structure associated device for heating and / or heating of the blank to be deformed can be brought to an elevated temperature profile.
  • the blank to be deformed according to claim 9 is annealed prior to deformation to the shell body.
  • Soft annealing is advantageous for reducing internal stresses and weld-related differences in yield strength.
  • the planar blank or the essentially circular or disk-shaped blank or the blank formed as a partial annulus or the blank to be deformed before deformation to the shell body by chip removal, in particular by turning, milling and / or grinding, precontoured, ie with a provided predetermined wall thickness distribution in the flat state, and / or with openings, perforations or the like recesses, which for forming by the at least one deformable beulstabile shim and / or covers, in particular a film, temporarily closed be equipped.
  • the end wall thickness of the shell body can be set exactly.
  • the support structure facing the rear or outer side of the blank to be deformed and provided as a support to be deformed bulge-proof side facing the support structure facing away from the front or inside of the blank to be deformed or provided as a support to be deformed bulge-proof supplement is sealed and a vacuum applied to one of the blank to be deformed and / or the at least one bulge-proof insert to be deformed closed chamber of the support structure.
  • the deformation of the blank to be deformed and the at least one bulge-proof insert to be deformed is thus assisted by defined evacuation of the chamber.
  • the abovementioned openings, perforations or similar recesses of the truncated conical blank can be temporarily sealed in a vacuum-tight manner by using at least one bulge-proof insert to be deformed or separate covers, in particular a foil.
  • Such a geometric measurement of the blank may be, for example be carried out automatically by means of a, possibly non-contact and einschwenkenden, measuring system.
  • the geometric measurement is particularly advantageous in order to obtain data for an adaptation of the parameters of parallel and / or subsequent transformation.
  • the truncated conical blank is advantageously a solution annealing and subsequent quenching, and if necessary, a subsequent cold stretching, subjected.
  • the shell body according to the features of claim 11 after deformation or forming or concave pressing in the support structure or in the oven is warmed and brought to a state T8.
  • the shell body is made of metal, in particular of aluminum or an aluminum alloy, optimal compensation is generally desired in order to achieve a state T8 in the material properties.
  • state T8 is currently the maximum state that can be achieved with age-hardenable aluminum alloys, which are frequently used for rocket fuel tanks.
  • the flat blank and / or the at least one flat beulstabile shim and / or deforming the blank and / or the at least one deformable beulstabile supplement according to claim 12 of metal, in particular steel, stainless steel, aluminum, titanium, a Alloy thereof and / or a combination thereof, preferably high and high strength aluminum alloys and lithium-containing aluminum alloys, and most preferably an optionally hardenable aluminum alloy, AL 2195 or AL 2219, and / or plastic and / or ceramic and / or formed from a combination thereof.
  • the at least one flat beulstabile supplement or the at least one deformable beulstabile supplement from a Material with a high modulus of elasticity is formed.
  • the method according to the invention according to claim 14 is very particularly suitable for the production of shells as domes for rocket fuel tanks, satellite tanks, paraboloid antennas, paraboloid reflector shells, paraboloid solar collectors, headlight housings, container bottoms, tower domes, pressure domes or the like.
  • the method according to the invention is for forming or deforming a substantially planar blank 10 made of metal, in particular steel, stainless steel, aluminum, titanium, an alloy thereof and / or a combination thereof, preferably high-strength and ultra-high-strength aluminum alloys and lithium metal. containing aluminum alloys, and most preferably a, preferably curable, aluminum alloy, such as Al 2195 or Al 2219, and / or plastic and / or ceramic and / or a combination thereof to a - optionally also in particular thin-walled - shell body , cup-shaped component or the like molding provided, both in the cold and in the warm state.
  • the method according to the invention is particularly suitable for producing rotationally symmetrical and / or non-rotationally symmetrical cup-shaped components.
  • the process according to the invention serves to produce hemispherical, spherical cap-shaped, dome-shaped, ellipsoidal kallotenförmig, conical, elliptical, Cassini-shaped, semi-toroidal or with other cross-sectional shapes configured components.
  • the method according to the invention is suitable for producing shells as domes for rocket fuel tanks, satellite tanks, paraboloid antennas, paraboloid reflector shells, paraboloid solar collectors, headlight housings, container bottoms, tower domes, pressure domes or the like.
  • the method according to the invention comprises a first step, in which at least one bulge-proof supplement 12 or similar underlay and / or support is formed.
  • the at least one beulstabile supplement 12 or the like pad and / or support is deformable so far, although in particular limited deformable to prevent wrinkling of the blank 10 to be deformed on the bulge or to stabilize the blank 10 to be deformed such that the risk of Wrinkling is avoided.
  • the at least one beulstabile supplement 12 is adapted to shape, dimension and deformation properties of the planar blank 10 and tuned to this.
  • the planar blank 10 and the at least one dent-resistant insert 12 each have the shape of a (square / rectangular) plate or a sheet.
  • a planar blank 10 'and at least one planar, bulge-proof shim 12' are formed from the planar blank 10 and the at least one planar, bulge-proof shim 12.
  • planar blank 10 'and the flat beulstabile supplement 12', each worked out, form in the embodiment in the Fig. 1 is shown, even to be deformed blank 14 and at least one beulstabile supplement 16 to be deformed to be deformed blank 14 and the at least one dent-resistant supplement 16 accordingly each have a circular or disc shape.
  • an insert 16 'provided as an insert 16 is slightly larger in dimension than the blank 14 to be formed and / or an insert 16 provided as a support 16 is dimensioned slightly smaller than the blank 14 to be formed.
  • planar blank 10 and the at least one dent-resistant shim 12 are firstly converted into a planar blank 10 'and a bulge-proof shim 12', each of which is in the form of a partial annulus or truncated cone.
  • the elaboration is carried out as in the embodiment of Fig. 1 by cutting, in particular by mechanical cutting, cutting by means of laser or water jet, sawing, milling or eroding, of the planar blank 10 and of the at least one planar tuft-stable insert 12.
  • friction stir welding vibration stir welding or FSW is used as the most preferred welding method.
  • the blank to be deformed 14 has an inner side 20 and an outer side 22 and further has a small opening 24 and a large opening 26.
  • the small opening 24 forms the so-called Pol, while the large. Opening 26 is an outer periphery.
  • the small opening 24 may optionally be replaced by a (pole) cap of any shape to be welded, i. in the form of a flat disc and a multi-curved shape (for example, hemisphere, spherical section, pressed / stretched ellipsoid, etc.) are closed in order to distribute the force to be deformed on the blank 14 to a greater extent and thus facilitate the forming.
  • the large opening 26 can be designed by a molded flange or board so that the clamping for forming easier or is defined geometrically reproducible.
  • the at least one dent-resistant shim 16, 16 ', 16 "to be deformed generally has no apertures 24, 26, which additionally facilitates the forming process.
  • the at least one shim 16, 16', 16" has the same way as the one deforming blank 14 has an inner side 20 and an outer side 22.
  • Fig. 1 illustrated embodiment of the deforming blank 14 and the at least one bulge-proof supplement 16 to be deformed which are of substantially circular or disc-shaped design, correspond to the front side of the inner side 20 and the back side of the outer side 22 of blank 14 and supplement 16.
  • the blank 14 to be deformed is advantageously supported prior to deformation with at least one bulge-proof insert 16, irrespective of the shape of the blank 14 to be deformed or of the at least one bulge-proof insert 16 to be deformed, ie whether it is circular or disc-shaped ( Fig. 1 ) or frusto-conical ( Fig. 2 and 3 ).
  • a support 16' Supplement 16 in the dimension slightly larger than the blank to be deformed 14.
  • the supplement 16 provided as a support 16 is somewhat smaller in dimension than the blank 14 to be deformed.
  • the at least one, in this case two, bulge-proof insert 16 ', 16 "prevents bulging of the blank 14 to be deformed , at least considerably more difficult.
  • the buckling stability of the inserts 16 ', 16 can be achieved both by their thickness and by suitable choice of the material, that is, by the choice of a material with the highest possible modulus of elasticity.
  • Fig. 4 continues to be removable, are to be deformed Blank 14 and the at least one beulstabile shim 16 to be deformed then arranged to each other, such that the blank 14 and the shim 16 are brought to the mutual full-surface contact after arranging and during the entire deformation of the blank 14 to be deformed.
  • the blank 14 to be deformed and the at least one beulstabile shim 16 to be deformed are then inserted into a support structure 28 in a further step of the method according to the invention.
  • the support structure 28 may be formed as an open frame or room framework.
  • the blank 14 to be deformed and the at least one beulstabile supplement 16 to be deformed come into contact with a means for clamping (not shown) exclusively over a circumference in the region of the large opening 26.
  • the blank 14 and the at least one supplement 16 are, for example, by the means for clamping via a spinning ring and a clamping ring, and optionally a sealing ring between the spinning ring and clamping ring (each not shown) clamped, held and fixed permanently and reliably during forming.
  • the blank 14 to be deformed contacts the support structure 28 between the circumference in the region of the large opening 26 and the circumference in the region of the small opening 24 Not. In this way, any additional constraint outside the clamping at the large opening 26 is avoided.
  • the support structure 28 comprises a chamber 30, which will be explained in more detail below.
  • the chamber 30 is substantially cup, pot, bowl, cone, truncated cone or the like hollow-shaped.
  • the shape of the chamber 30 of the support structure 28 gives way, as the Fig. 4 is removable, of the shape and dimension of the blank to be deformed 14 and the at least a bulge-proof supplement 16 to be deformed.
  • the blank to be deformed and the at least one deformable beulstabile shim 16 in the support structure 28 and / or the chamber 30 are received without contact with increasing deformation without contact.
  • the forming tool 32 acts on the front or inside 20 of the blank 14 to be deformed or the at least one to be deformed as a support 16 "provided supplement 16th
  • a very preferred deformation is carried out in the inventive method by means of concave pressing or spin forming of the blank 14 to be deformed together with the at least one bulge-proof insert 16, 16 ', 16 "to be deformed.
  • the blank 14 to be deformed is formed via at least one die Inner side 20 deforming forming tool 32 deformed in the form of a forming or spinning roller Fig. 4 Two such forming or pressing rollers are used. Alternatively or cumulatively, it is also possible to use at least one, preferably hydrostatically mounted, spinning ball.
  • the blank 14 to be deformed and the at least one beulstabile supplement 16 are deformed by counter-rolling and / or hammering and / or shot peening to the shell body 34.
  • the at least one forming tool 32 is either by at least one interacting with the outer side 22 of the blank to be deformed 14 acting counter-roller (not shown) or as at least one hammer and / or as balls made of metal, glass or a combination thereof.
  • the forming tool 32 which acts on the front or inner side 20 of the blank 14 to be deformed and the at least one bulge-proof insert 16 to be deformed, in a plane radially to the blank 14 to be deformed and the at least one bulge-proof insert 16 to be deformed , 16 ', 16 "are guided two-dimensionally from the center to the periphery of the blank 14 and the at least one bulge-proof insert 16, 16', 16", and vice versa, with a planar substantially circular or disk-shaped configuration. Otherwise, i.
  • the forming tool When formed as a partial annulus, the forming tool is guided by the circumference in the region of a small opening 24 to the periphery in the region of a large opening 26 of the blank 14 and the at least one bulge-stable supplement 16, 16 ', 16 ", and vice versa 32 is controlled and / or controlled by means of a template or numerically.
  • Fig. 4 is schematically indicated by the arrows 36, that the blank to be deformed 14 is fixedly arranged in the support structure 28, while the forming tool 32 moves or rotates.
  • a kinematic reversal thereof may also be advantageous, ie that the blank 14 to be deformed is rotatable in or together with the support structure 28, while the forming tool 32 is movable only in the radial direction.
  • a combination of this is possible, so that both the blank to be deformed 14 in or with the support structure 28 and the forming tool 32 relative are designed to be rotatable.
  • the blank 14 to be deformed is preferably brought to an elevated temperature profile via at least one device assigned to the support structure 28 for heating and / or heating (not shown) of the blank 14 to be deformed.
  • the blank to be deformed 14 Before deformation to the shell body 34, the blank to be deformed 14, for example, be annealed. Furthermore, the blank 14 to be deformed, in particular after extensive deformation to the shell body 34, can be subjected to solution annealing and subsequent quenching and, if necessary, a subsequent cold stretching, if necessary. By the latter measures can be compensated for potential distortions, eliminate residual stresses and distribute lattice defects in the structure as homogeneously as possible.
  • planar blank 10 or the substantially circular or disc-shaped blank 10 'or formed as a partial annulus blank 10' and / or the blank to be deformed 14 may also be prior to deformation to the shell body 34 by chip removal, in particular by turning, milling and / or grinding, are provided with a contouring, wherein a predetermined wall thickness distribution of the blank 10, 10 ', 14 is set to obtain a desired end wall thickness of the shell body 34.
  • a defined evacuation may additionally be provided.
  • the outer surface 22 of the blank 14 to be deformed facing the support structure 28 is sealed against the inner side 20 of the blank 14 to be deformed, which faces away from the support structure 28, and a vacuum is applied to one of them Blank 14 completed chamber 30 of the support structure 28 applied.
  • the support structure 28 may be formed, for example, as a space frame with a vacuum-resistant wall or the chamber 30 as a vacuum chamber.
  • Openings, perforations or the like recesses on the flat blank 10 and the flat, designed as a straight circular cone blank 12 and the blank to be deformed 14 can be separated by separate covers, in particular a foil, as well as in an advantageous manner by the bulge / n side dish / n 16 ', 16 "temporarily sealed vacuum-tight when deformed.
  • the blank 14 to be deformed is preferably measured continuously.
  • the shell body 34 may be thermally stored after deformation in the support structure 28 or in the oven and brought to a state T8.

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

Claims (14)

  1. Procédé de mise en forme d'une ébauche (10) de surface sensiblement plane pour donner un corps en cuvette (34), comprenant les étapes suivantes consistant à :
    a) réaliser deux cales (12) plans résistants au voilement et adaptés à la forme, aux dimensions et aux propriétés de déformation de l'ébauche plane (10),
    b) former une ébauche à déformer (14) et deux cales à déformer (16', 16") résistants au voilement, à partir de l'ébauche plane (10, 10') et des cales (12, 12') plans résistants au voilement, dans lequel on réalise un accessoire en tant que dessous (16') avec une dimension légèrement plus grande que celle de l'ébauche à déformer (14), et on réalise une cale en tant que dessus (16") avec une dimension légèrement plus petite que celle de l'ébauche à déformer (14),
    c) agencer mutuellement l'ébauche à déformer (14) et les deux cales à déformer (16', 16") résistants au voilement, de telle sorte que l'ébauche à déformer (14) et les deux cales à déformer (16', 16") résistants au voilement, sont amenés par toute la surface en appui mutuel, après l'agencement et pendant toute la déformation de l'ébauche à déformer (14) pour donner le corps en cuvette (34),
    d) serrer l'ébauche à déformer (14) ensemble avec les deux cales à déformer (16', 16'') résistants au voilement, par leur périphérie sur ou dans une structure porteuse (28), et
    e) déformer l'ébauche à déformer (14) ensemble avec les deux cales à déformer (16', 16") résistants au voilement, par un outil de mise en forme (32) qui sollicite l'accessoire à déformer, prévu en tant que dessus (16"), pour donner le corps en cuvette (34) par compression concave ou mise en formation par spin et/ou par contre-rouleaux.
  2. Procédé selon la revendication 1,
    caractérisé en ce que
    l'ébauche à déformer (14) et les cales à déformer (16', 16") résistants au voilement, sont réalisés à partir d'une ébauche plane (10') et de deux cales plans (12') résistants au voilement, qui sont chacun sensiblement en forme circulaire ou en forme de disque ou qui sont réalisés chacun sous forme d'anneau circulaire partiel.
  3. Procédé selon la revendication 2,
    caractérisé en ce que
    l'ébauche plane (10') et les deux cales (12') plans résistants au voilement qui sont réalisés chacun sensiblement en forme circulaire ou en forme de disque ou qui sont réalisés chacun sous forme d'anneau circulaire partiel sont oeuvrés à partir de l'ébauche plane (10) et des deux cales plans (12), résistants au voilement, par séparation, en particulier par coupe mécanique, par coupe au laser ou au jet d'eau, par sciage, fraisage ou érosion, de l'ébauche plane (10) et des deux cales plans (12), résistants au voilement.
  4. Procédé selon la revendication 2 ou 3,
    caractérisé en ce que
    l'ébauche à déformer (14) et les cales à déformer (16', 16") résistants au voilement, sont chacun assemblés à partir de l'ébauche plane (10') et des cales à déformer (12') résistants au voilement, qui sont réalisés chacun en forme d'anneau circulaire partiel, pour les assembler en une ébauche à déformer (14) et en deux cales à déformer (16', 16") résistants au voilement, qui sont réalisés chacun en forme tronconique.
  5. Procédé selon la revendication 4,
    caractérisé en ce que
    l'ébauche à déformer (14) et les deux cales à déformer (16', 16") résistants au voilement sont chacun assemblés par soudage par agitation-friction (Friction-Stir-Welding ou FSW) le long de lignes enveloppes (18, 18') tournées l'une vers l'autre de l'ébauche plane (10') et des deux cales plans (12') résistants au voilement.
  6. Procédé selon l'une des revendications 1 à 5,
    caractérisé en ce que
    l'ébauche à déformer (14) et les deux cales à déformer (16', 16") résistants au voilement sont serrés et fixés sur ou dans la structure porteuse (28) par une périphérie dans la zone d'une grande ouverture (26) de l'ébauche à déformer (14) et des cales à déformer (16', 16") résistants au voilement, par un premier moyen pour serrer l'ébauche à déformer (14) et les cales à déformer (16', 16") résistants au voilement, et ceci à l'aide d'un anneau de pressage et d'un anneau de serrage ainsi qu'en particulier à l'aide d'un joint d'étanchéité entre l'anneau de pressage et l'anneau de serrage.
  7. Procédé selon l'une des revendications 1 à 6,
    caractérisé en ce que
    l'ébauche à déformer (14) et les deux cales à déformer (16', 16") résistants au voilement, et ledit au moins un outil de mise en forme (32) sont déplacés, en particulier tournés les uns par rapport aux autres, lors de la déformation pour donner le corps en cuvette (34).
  8. Procédé selon l'une des revendications 1 à 7,
    caractérisé en ce que
    l'ébauche à déformer (14) est amenée à un profil de température accrue par au moins un moyen associé à la structure porteuse (28) et destiné au chauffage et/ou à la mise à température de l'ébauche à déformer (14).
  9. Procédé selon l'une des revendications 1 à 8,
    caractérisé en ce que
    l'ébauche à déformer (14) est traitée avec un recuit doux avant de la déformer pour donner le corps en cuvette (34).
  10. Procédé selon l'une des revendications 1 à 9,
    caractérisé en ce que
    l'ébauche à déformer (14) est soumise à un recuit de mise en solution, suivi par une trempe, ainsi qu'en cas de besoin et le cas échéant par un étirage à froid successif.
  11. Procédé selon l'une des revendications 1 à 10,
    caractérisé en ce que
    le corps en cuvette (34) est vieilli à chaud dans la structure porteuse ou dans le four et il est mis à un état T8.
  12. Procédé selon l'une des revendications 1 à 11,
    caractérisé en ce que
    l'ébauche plane (10, 10') et/ou les deux cales plans (12, 12'), résistants au voilement et/ou l'ébauche à déformer (14) et/ou les deux cales (16, 16') à déformer, résistants au voilement, sont constitués en métal, en particulier en acier, en acier inoxydable, en aluminium, en titane, en un alliage de ceux-ci et/ou en une combinaison de ceux-ci, de préférence par des alliages d'aluminium de haute résistance ou de très haute résistance et par des alliages d'aluminium contenant du lithium, et tout particulièrement préféré par un alliage d'aluminium le cas échéant durcissable, AL 2195 ou AL 2219, et/ou par une matière plastique et/ou par une céramique et/ou par une combinaison de ceux-ci, et/ou en particulier en ce que les cales plans (12, 12') résistants au voilement ou les cales à déformer (16', 16") résistants au voilement, sont constitués en un matériau à haut module d'élasticité.
  13. Utilisation du procédé selon l'une des revendications précédentes pour réaliser des composants à symétrie de révolution et/ou sans symétrie de révolution, en forme de cuvette, en particulier en forme hémisphérique, en forme de capuchon sphérique, en forme de calotte, en forme de calotte ellipsoïdale, en forme conique, en forme elliptique, en forme de Cassini ou en forme de demi-tore.
  14. Utilisation du procédé selon l'une des revendications précédentes pour réaliser des cuvettes à titre de dômes pour des réservoirs à carburant pour fusées, des réservoirs pour satellites, des antennes paraboliques, des coques de réflecteur paraboliques, des collecteurs solaires paraboliques, des boîtiers de phare, des fonds de récipient, des dômes de tour ou de calottes de pression.
EP11717473.0A 2010-03-29 2011-03-28 Procédé pour former une ébauche sensiblement plane pour donner un corps en cuvette, et son utilisation Not-in-force EP2552616B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010013206A DE102010013206B4 (de) 2010-03-29 2010-03-29 Verfahren zum Umformen eines im Wesentlichen ebenflächigen Rohlings zu einem Schalenkörper und dessen Verwendung
PCT/EP2011/001547 WO2011124340A1 (fr) 2010-03-29 2011-03-28 Procédé pour former une ébauche sensiblement plane pour donner un corps en cuvette, et son utilisation

Publications (2)

Publication Number Publication Date
EP2552616A1 EP2552616A1 (fr) 2013-02-06
EP2552616B1 true EP2552616B1 (fr) 2018-01-17

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EP11717473.0A Not-in-force EP2552616B1 (fr) 2010-03-29 2011-03-28 Procédé pour former une ébauche sensiblement plane pour donner un corps en cuvette, et son utilisation

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Country Link
US (1) US9468965B2 (fr)
EP (1) EP2552616B1 (fr)
DE (1) DE102010013206B4 (fr)
ES (1) ES2661971T3 (fr)
WO (1) WO2011124340A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016086250A2 (fr) 2014-12-01 2016-06-09 Georg Michael Ickinger Cylindre de séchage sous forme de double cylindre coaxial avec interstice annulaire
US9719150B2 (en) * 2015-01-05 2017-08-01 The Boeing Company Methods of forming a workpiece made of a naturally aging alloy
CN106374827A (zh) * 2016-11-14 2017-02-01 常熟市永祥机电有限公司 太阳能光伏用聚光装置
CN117019960B (zh) * 2023-08-16 2024-04-09 中国航发贵州黎阳航空动力有限公司 一种大尺寸超薄壁高温合金封严片的无焊缝成型方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE807805C (de) * 1948-10-02 1951-07-05 Bayer Ag Verfahren zum Ziehen von Blechen ohne Festhaltevorrichtung
US3132420A (en) * 1960-12-30 1964-05-12 Lukens Steel Co Pack formed contoured light gage missile heads
US3355920A (en) 1965-06-28 1967-12-05 Westinghouse Electric Corp Method of spinning cup-shaped articles and apparatus therefor
JPS5339183B2 (fr) * 1974-07-22 1978-10-19
GB8421634D0 (en) * 1984-08-25 1984-09-26 Alcan Int Ltd Forming of metal articles
DE4016097A1 (de) * 1990-05-18 1991-11-28 Zeppelin Metallwerke Gmbh Verfahren und vorrichtung zum metalldruecken
US6629353B2 (en) * 2000-05-22 2003-10-07 Eads Launch Vehicles Dome made of aluminum alloy; particularly intended to form the bottom of a tank; and method of manufacturing it
DE102005024627A1 (de) * 2005-05-30 2006-12-07 Mt Aerospace Ag Vakuumgestütztes Verfahren und Vorrichtung zum Umformen eines im Wesentlichen flächigen Rohlings aus Metall zu einem dünnwandigen Schalenkörper sowie deren Verwendung

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WO2011124340A1 (fr) 2011-10-13
US9468965B2 (en) 2016-10-18
EP2552616A1 (fr) 2013-02-06
DE102010013206A1 (de) 2011-09-29
US20130219981A1 (en) 2013-08-29
ES2661971T3 (es) 2018-04-04
DE102010013206B4 (de) 2013-09-05

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