EP1301292B1 - Verfahren zur herstellung eines strukturbauteils mit einer rohrförmigen metallwand und strukturbauteil - Google Patents

Verfahren zur herstellung eines strukturbauteils mit einer rohrförmigen metallwand und strukturbauteil Download PDF

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Publication number
EP1301292B1
EP1301292B1 EP01955416A EP01955416A EP1301292B1 EP 1301292 B1 EP1301292 B1 EP 1301292B1 EP 01955416 A EP01955416 A EP 01955416A EP 01955416 A EP01955416 A EP 01955416A EP 1301292 B1 EP1301292 B1 EP 1301292B1
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EP
European Patent Office
Prior art keywords
wall
structural element
sections
section
frame
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP01955416A
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English (en)
French (fr)
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EP1301292A1 (de
Inventor
Jean Pierre Reyal
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Aperam Alloys Imphy SAS
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Imphy Alloys SA
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Publication date
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Publication of EP1301292A1 publication Critical patent/EP1301292A1/de
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Anticipated expiration legal-status Critical
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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/08—Making tubes with welded or soldered seams
    • B21C37/0803—Making tubes with welded or soldered seams the tubes having a special shape, e.g. polygonal tubes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49616—Structural member making
    • Y10T29/49623—Static structure, e.g., a building component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12229—Intermediate article [e.g., blank, etc.]
    • Y10T428/12264—Intermediate article [e.g., blank, etc.] having outward flange, gripping means or interlocking feature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12354—Nonplanar, uniform-thickness material having symmetrical channel shape or reverse fold [e.g., making acute angle, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12375—All metal or with adjacent metals having member which crosses the plane of another member [e.g., T or X cross section, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12382—Defined configuration of both thickness and nonthickness surface or angle therebetween [e.g., rounded corners, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/1241—Nonplanar uniform thickness or nonlinear uniform diameter [e.g., L-shape]

Definitions

  • the invention relates to a method for manufacturing a structural element. having a metal wall of generally tubular shape comprising at at least two sections that are not axially aligned and a structural element tubular metal wall which can be produced in forms and for very diverse applications.
  • a structural element according to the preamble of claim 5 is known e.g. from document US-A-5,018,263.
  • Such structural elements may be curved or have successive straight sections in angular arrangements, for example making right angles between them, in the case of structural elements as square or rectangular frames.
  • the object of the invention is therefore to propose a manufacturing process of a structural element having a metal wall of generally tubular shape comprising at least two axially non-aligned sections which is of a simple implementation and of a limited cost and which makes it possible to carry out structures of complex shape, rigid and light, made of metallic materials any.
  • Figure 1 is a plan view of a portion of a cut plate which can be used for the production of a post with a polygonal section of a structure according to the invention in the form of a frame.
  • Figure 2 is a schematic cross-sectional view of the upright polygonal section made by folding the plate shown on the Figure 1, in a phase prior to welding of a connection part and fixing.
  • Figure 3 is a perspective view of a curved surface door carried out by the method of the invention.
  • Figure 4 is a plan view of a cut sheet metal plate for the realization of the door frame shown in Figure 3.
  • Figure 5 is an enlarged view of part of the plate shown in figure 4.
  • Figures 6 and 7 are partial perspective views of the frame door produced by folding and welding the metal plate shown on Figure 4.
  • Figure 8 is a perspective view. of a structural element of annular shape which can be produced by the method of the invention.
  • Figure 9 is a plan view of part of a metal plate for the production of the structural element shown in FIG. 8.
  • Figure 10 is a perspective view of part of one of the faces of the plate shown in Figure 9.
  • Figures 11 and 12 are perspective views of part of the structural element shown in FIG. 8, during a phase of folding and an assembly phase of the manufacturing process.
  • part of a metal plate has been represented. generally designated by the reference 1, this part of the plate 1 being intended to constitute part of a section constituting the side of a polygonal frame which is a structural element according to the invention.
  • the metal plate 1 as a whole has extensions of the part shown in Figure 1, in the longitudinal direction 2 as well as other parts intended to constitute by folding on other sides of the frame possibly having cross sections of shape polygonal different from the shape of the section of the section represented on the figure 2.
  • FIGS. 1 and 2 have the simple aim of explaining the principle of the method of manufacture according to the invention, without describing the complete manufacture of a structural element.
  • the section of the metal plate 1 shown in Figure 1 shows the shape of a rectangular strip extending in the longitudinal direction 2 and having a sufficient width to make the section of a side of rectangular frame shown in Figure 2.
  • a first frame manufacturing operation consists of cutting the plate 1 in a sheet of metal material of nature and thickness desired.
  • the process according to the invention makes it possible to produce structures of generally tubular shape whose wall thickness may be small and comprised, for example between 50 ⁇ m and 1 mm, such thin-walled structural elements cannot be manufactured by known methods such as angular assembly of tubes.
  • the inward folding of the portions 7 and 8 of the metal plate is made so that the flap 8 is located below the flap 7 and that the flaps 7 and 8 have an angle residual opening relative to their closed position 7 'and 8'.
  • the overlapping assembly and fixing of the portions 7 and 8 is produced by exerting a force 9 on the flap 7, in the vertical direction direction of the flap 8 and from the outside towards the inside of the section on the side of frame 3.
  • the flap 7 pivots around its folding axis and comes to press on the flap 8 which pivots itself around its axis of folding.
  • the movement of the flaps 7 and 8 is determined so as to constitute the upper wall on side 3 of the frame by overlapping the flaps in the coplanar positions 7 'and 8'.
  • the flap 7 ' is held in place by the pushing element exerting force 9 and element 8 in its position 8 'exerts, by elastic return, a pressing force against the underside of the flap 7 ', so that the flaps 7 and 8 in their position 7 'and 8' are perfectly flat and in contact elastic against each other.
  • the part of the upper flap 7 between the free edge of the flap 7 and the line 7a along which the free edge of the flap 8 is applied in the plated position constitutes a covering and fixing portion of the metal plate ensuring the closure of the tubular structure.
  • an installation welding such as a laser welding head 10 with which several points or welding lines can be made in the direction longitudinal 2, through the superimposed parts of the flaps 7 and 8, that is to say through the covering part of the flap 7 and of the wall part of the flap 8 covered by the covering part.
  • Such welding performed in the thickness of the superimposed parts of the flaps 7 and 8 using a beam laser is called transparent welding.
  • the structure is stiffened because any sliding of the covering part on the wall has become impossible.
  • a structural section can be made such as a side of a frame having a polygonal section of any shape in a simple manner, by folding, elastic bearing of a covering part on a wall part and welding, for example using a laser, the covering part on the part of the wall covered.
  • this device must however be able to carry out welding from outside the structure, without contact with the walls of the structure.
  • the process according to the invention can therefore be implemented in the case of industrial sheets whose flatness is such that there is a certain proliferation when stacking sheet metal parts.
  • FIG. 3 A first device incorporating a structural element produced according to the invention has been shown in FIG. 3.
  • FIG 3 there is shown a metal door designated generally by the reference 11 which includes a generally shaped frame rectangular 12 whose sides have a tubular structure and which has was carried out by the method according to the invention.
  • the frame has two horizontal sides, respectively, upper 12a and lower 12b and two vertical lateral sides, respectively, 12c and 12d.
  • the upper and lower sides 12a and 12b are produced under a tubular in shape and have a triangular cross-section and the lateral sides 12c and 12d, also produced in tubular form, have a rectangular cross section.
  • the end edge upper and lower sides 12a and 12b connected together according to the tip part of the triangle of the cross section constitutes a surface curve on which can be fixed, at each of its upper ends and lower, a door facing 13 which thus has a curved shape.
  • the facing 13 may be constituted by a simple sheet metal added and fixed by welding along the curved edges of the two sides 12a and 12b of the frame door.
  • the frame 12 of the door can be produced by the method according to the invention, by simple cutting and folding of a metal plate to form the walls of the frame and the covering parts of the walls allowing the assembly and fixing the folded parts of the frame and fixing the sides of the frame between them, to produce the closed structure shown in FIG. 3.
  • the facing sheet 13 is then added and fixed by welding on the edges of the frame and in particular on the upper and lower curved edges.
  • a curved metal door is thus obtained, the frame of which has section sides of different shapes, which improves aesthetics of the door and give it an original appearance.
  • Such a door can be used to close cabinets or technical premises or to ensure the closure of premises in residential use.
  • a frame as shown in Figure 3, the manufacture of which will be described with reference to Figures 4 to 7 can be achieved not only so to constitute a door frame but also a usable frame, for example, in a screen printing machine.
  • the frame which is made in a light and rigid manner can easily ensure the fixing and tensioning of a serigraphy canvas fixed along the edges of the frame.
  • FIG 4 there is shown a metal plate designated generally by the reference 14 which has been cut from a metal sheet such as a sheet or strip, in the form of an elongated strip having cut-outs between each of the parts of the strip intended to form one side of the frame.
  • the walls of the end sides 12a and 12b of the frame are made at starting from the portions 15a and 15b of the plate 14 in the form of an elongated strip and the lateral sides with rectangular section 12c and 12d are made from portions 15c and 15d of the plate 14.
  • the fold lines of the strip portions 15a, 15b, 15c and 15d to make by folding the corresponding side of the generally tubular section frame, respectively, triangular and rectangular.
  • Each of the plate portions 15a, 15b, 15c and 15d has a main part constituting a flat developed on the side of the frame and covering and fixing parts intended to ensure closure and fixing the sides of the frame as well as fixing the sides of the frame between them.
  • the sections 15a and 15b have three flat parts separated by parallel fold lines between them intended to constitute the three sides of the frame with triangular cross-section as well as two longitudinal edges intended to come in overlap to ensure assembly and fixing end sides of the frame.
  • the two longitudinal edges of the parts 15a and 15b of the metal plate are limited by a curved line and the lower edges are slightly stamped so as to allow to nest the two edges brought together, the stamped parts ensuring more greater rigidity at the edge of the frame serving in particular to the fixing of a facing or a canvas.
  • the parts 15c and 15d of the metal plate include a part main consisting of four portions in the form of steering strips longitudinal separated by fold lines which are intended to constitute the four sides of the wall on the side of the rectangular section frame and two covering portions intended to overlap two portions folded constituting two constituent faces on the side of the form frame general parallelepiped.
  • the cuts between the successive parts of the metal plate 14 are made in such a way that after folding, the ends of the sides sides of the frame fit into the triangular section end sides and that each corner of the frame is broken.
  • the cutting is made so as to provide tongues and flaps constituting parts for covering and fixing the frame walls and the sides of the frame between them.
  • the covering parts are constituted by the longitudinal outer edges of the parts 15a and 15b which are placed facing each other during folding and kept in elastic support, one on the other during the welding which is carried out, for example, by a laser beam, in transparency according to welding points or lines distributed according to the length of the edges placed in coincidence and in elastic support one on the other.
  • connection zones 16 have been shown, constituted by stamped depressions produced along each of the edges to connect end sides of the frame and engaged with each other when of the elastic support of the two edges to be assembled one on the other.
  • the lines welding can be done in the depressions 16 in one direction parallel or in a direction perpendicular to the edges of the end side of the frame which is assembled.
  • the covering parts constituted by the two band-shaped portions cover two portions constituting faces of the walls of the lateral sides.
  • the welding of the sides of the frame can be carried out in a simple and fast, by creating a limited number of distributed welding points or lines along the length of the sides of the frame in the junction zones.
  • the elastic support of the covering parts one on the other or on a part of the wall makes it possible to achieve satisfactory contacting during welding that provides a strong junction.
  • the fixing of the sides lateral to the end sides is provided by parts of covering constituted by flaps or tabs 17, in the parts joining the end or side sides of the frame.
  • the flaps 17 constituting complementary parts for covering the walls of the end sides are resiliently pressed against side walls side while transparent laser welding of the flaps 17 on the walls.
  • the flaps 17 constituting parts side walls are overlapped and in elastic support on the walls of the end sides while carrying out transparent laser welding.
  • the joining by welding of the covering parts with additional covering parts or with frame walls makes it possible to obtain a perfectly rigid assembly, even in the case where a thin metal plate is used, for example a plate metal with a thickness of the order of 0.7 or even 0.5 mm.
  • Such frames can have many applications in the case where both good rigidity and reduced mass are sought, for example in the case of a frame made from an expensive material.
  • relatively small metal plates can be used thick, for example metal plates with a thickness greater than 1 mm, to form the walls of the hollow structure and the covering parts ensuring assembly after folding of the structure.
  • FIG 8 there is shown a part of annular structure and of general tubular shape which can be produced by the process of the invention from a single plate or strip of metal folded to form walls of the structure and of the covering and fixing parts.
  • the part 18 shown in Figure 8 has the shape of a ring which can be of large dimension and whose section hollow cross section has a substantially rectangular shape.
  • the part 18 consists of successive annular sections 19 having an angular amplitude adapted to the manufacturing process which will be described thereafter and which are connected by points or weld lines made on covering parts in elastic support on parts of wall of the structural element.
  • annular part 18 as shown in FIG. 8 comprising twelve sections 19 each having a angular amplitude of 30 °.
  • FIG. 9 part of a metal plate has been represented. making it possible to manufacture the structural element shown on Figure 8, by folding and welding.
  • the metal plate, part of which is shown in Figure 9 is generally designated by the reference 20.
  • Each of the sections 19 of the metal structure is produced from of a section 21 of the metal plate 20.
  • Each section 21 has a portion 22 intended to constitute a part of the external cylindrical surface of the annular structural element 18, at a section 19.
  • the stamped portions 22 are separated from each other by lines or fold zones 23 of transverse direction spaced one of the other in the longitudinal direction of the strip-shaped plate 20.
  • Successive stamped areas can be achieved by a stamping machine comprising for example a wheel or a cylinder having successive stamping zones of cylindrical shape convex separated by transverse depressions.
  • One of the wall portions (24 ') is extended by a wall portion 25 having, as a length, the length of the small base of the walls 24 and 24 'and a width substantially equal to the width of the stamped zone 22.
  • the wall portion 25 is intended to constitute an internal wall part prismatic of the annular part 18.
  • the wall part 25 is extended laterally by an additional covering part 26 intended to ensure the closure of the tubular section 19, during folding and the assembly of section 21.
  • the wall portions 24 and 24 ' comprise, according to one of their inclined lateral sides, a covering and fixing part constituted by a flap 27 or 27. '
  • the wall portion 25 has on one of its lateral sides a covering part constituted by a flap 28.
  • the wall portions 24 ', 25 and 26 are separated from each other by fold lines of longitudinal direction.
  • FIG 11 there are shown two successive sections 19 of the annular part 18 which have been shaped and assembled by folding wall portions 24, 24 'and 25 around the longitudinal fold lines and by folding down the covering part 26 against the outer face of the wall portion 24 folded substantially at 90 ° relative to the wall portion stamped 22.
  • the assembly and the fixing of the section 19 of the annular part 18 can be produced by applying elastic support by pushing, in a transverse direction, the covering part 26 against the portion of wall 24.
  • the covering part 26 and the wall portion 24 in elastic contact are perfectly pressed against each other, so that the section 19 of the annular part 18 can be assembled by transparent welding using a laser beam to perform weld points or lines in the thickness of the walls 26 and 24.
  • stamped areas for receiving the flaps 27 and 27 ′ can be provided in the longitudinal end portions of the wall portions 24 and 24 'of the section 21 located adjacent to the section with flaps 27 and 27 '.
  • the flaps 27 and 27 ' are folded slightly towards the outside of so as to come into elastic support inside the stamped end zones walls 24 and 24 'of section 21 adjacent to the section comprising the flaps 27 and 27 ', during the engagement obtained by pivoting the two sections 21 relative to each other around the fold line separating the two zones 22.
  • the flap 28 engages in a stamped area of the wall portion 25 of the section adjacent to the section comprising the flap 28. During of its engagement, the flap 28 is slightly folded inwardly of the annular part 18, so as to come into resilient abutment against the part end of the wall portion 25.
  • the flaps 27, 27 'and 28 are held in elastic support against the engaging parts of the walls of the neighboring section 19, during welding assembly.
  • the outside of the structure 18 of tubular shape produces the welds of the flaps 27, 27 ′ and 28 of the successive sections 19 of the device after folding along the fold line separating two stamped sections 22 successive.
  • Welding can be carried out transparently by a laser beam, the flaps being perfectly kept in contact with the end parts walls of a neighboring section 19, by elastic return. We can favor the contact between the end parts of the walls and the flaps by exerting pressing or pinching the walls, in the direction from the outside towards the inside of the tubular structure.
  • it is determined by calculation, by performing a digital simulation of the loading in service of the structural element, areas of the structural element where the stress concentration is the weakest. We weld points or lines in these areas determined by calculation.
  • weld points or lines are generally made in transparency by a laser but it may be possible to perform, in some cases, welds along the edges brought together against a part of connection and a portion of wall in elastic support against each other, this welding method being designated as lap welding.
  • the assembly can be carried out without template inside the structure tubular element, which allows for elements in which the cross section of the tubular structure is variable. Maintaining wall portions to be welded during welding can be performed by simple mechanical devices such as pliers or clamps.
  • Extremely rigid structural parts can be produced from thin sheets, due to the stiffening effect obtained by the welding of a covering part on a wall element or another covering part of the structural element.
  • Parts of the element of structure can be reinforced by superimposing an element of overlap to a wall portion, the overlap portion and the portion of the wall being immobilized by welding, for example in transparency.
  • the method of the invention makes it possible to manufacture structural elements in any metals and in particular structural elements difficult to weld metals such as aluminum and its alloys.
  • the structural elements according to the invention are characterized by a generally tubular shape preferably of polygonal cross section comprising at least two tubular sections not axially aligned, the element structure possibly comprising curved parts which can be obtained by stamping parts of the metal plate before the operation folding, this stamping operation can be performed before or after cutting the metal plate.
  • the structural elements according to the invention of generally tubular shape and of polygonal cross section are characterized in that they comprise a plurality of sections, in angular arrangements one by relative to each other, separated by fold lines of the same metal plate and at least one additional covering and fixing part as well as an additional part for fixing successive sections between them superimposed and fixed by at least one welding line or point overlapping, at least one of a wall portion and a second covering part, the entire structural element being assembled and stiffened, only by at least one welding point or line at least one covering element in the superimposed position and in elastic support on at least one of the wall portion and the second covering and fixing part.
  • Structural elements according to the invention used in industry of the building can be for example frames constituting parts opening or sleeping frames and in particular doors or windows. These frames may have tubular sectional sides cross-section of various shapes, to obtain a decorative effect. These frames, in particular when they constitute doors, may include a facing of curved shape and, in general, have curved parts.
  • a structural element according to the invention used in the building can also be a frame of double glazing for doors or windows.
  • a structure made from a metal plate folded and assembled by welding has significant advantages by compared to the classic type frames formed by profiles of square shape bent at right angles to the angles of the double glazing frame.
  • the section of the profile is strongly modified by folding which also results in adaptation folds on the surface of the profile.
  • Structural elements according to the invention can be used for the construction of housings of electrical devices for example as cabinet door frames or electrical boxes.
  • structural elements according to the invention can be used as screen printing frames.
  • the invention can also have many applications in the field of automobile, naval and aeronautical construction, structural elements according to the invention which can be used for the production hulls or chassis of vehicles and in particular of resistant structures in a squirrel cage which may include cover sheets.
  • Structural elements according to the invention can also be used in the production of cells and in particular of aircraft fuselages.
  • structural elements can be easily made from alloys light, difficult to weld such as aluminum or titanium alloys.
  • structural elements according to the invention can be used to replace complex shaped structures from unusually shaped profiles.
  • the structural elements according to the invention find applications as reinforcements or support structures which must have a very great rigidity and very great resistance and possibly a mass scaled down.
  • the structural elements according to the invention can be made up of curved profiles, possibly polygonal in section variable, or of structures in the form of a section frame or ring dig.
  • the structural elements according to the invention can also be used as heat exchangers, for example radiators or heating convectors.
  • tubular structure produced according to the invention must be sealed. In this case, we will make lines of continuous welding between the covering parts and the portions of walls and possibly between certain portions of walls.
  • the structural element according to the invention is such that it constitutes a practically continuous hollow body; when this hollow body is closed on itself, it can contain a flat closed line, located entirely inside the hollow body and passing inside each of its sections.
  • the metal plate (s) used to make the element structure according to the invention can be made of steel, in particular stainless steel, or any other ferrous alloy or even a non-ferrous alloy, for example aluminum alloy.
  • Welding can be carried out by a process different from the welding process.
  • laser beam welding although this process has advantages which were mentioned above.
  • the process according to the invention can be used to manufacture elements different from frames or annular parts with tubular structure.
  • the process according to the invention can be used for the manufacture of generally tubular parts with polygonal cross-section which are not closed on themselves like the frames or annular parts.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Laser Beam Processing (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Body Structure For Vehicles (AREA)
  • Forging (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)

Claims (6)

  1. Verfahren zur Herstellung eines Strukturbauteils mit einer allgemein rohrförmigen Metallwand, welches zumindest zwei nicht axial miteinander ausgerichtete Teilstücke (19) aufweist, dadurch gekennzeichnet, dass
    aus einem Bogen aus Metallmaterial zumindest eine ebene Platte (14, 20) ausgeschnitten wird mit einem Hauptbereich mit der ausgebreiteten Form der Teilstücke der Wand des Strukturbauteils (11, 18), und mit für jedes der Teilstücke (19) zumindest einem komplementären Überlappungs- und Befestigungsbereich, sowie mit zumindest einem komplementären Bereich zur Befestigung der Teilstücke aneinander;
    die ausgeschnittene Platte entlang einer Vielzahl von Linien derart gefalzt wird, dass aus den gefalzten Bereichen des Hauptbereichs der ausgeschnittenen Platte (14, 20) die Wand des Strukturbauteils (11, 18) ausgebildet wird; und
    zumindest ein komplementärer Überlappungs- und Befestigungsbereich für jedes der Teilstücke und zumindest ein komplementärer Bereich zur Befestigung der Teilstücke (19) aneinander an zumindest einem Bereich aus der Gruppe eines gefalzten Bereiches des Teilstücks der Wand des Strukturbauteils (11, 18) und eines zweiten Überlappungsbereiches durch Verschweißen befestigt wird, wobei zumindest ein komplementärer Überlappungs- und Befestigungsbereich für jedes Teilstück (19) und zumindest ein Bereich zur Befestigung der Teilstücke (19) aneinander und der gefalzte Bereich der Wand oder der zweite Überlappungsbereich in elastischem Anschlag gegeneinander gehalten werden.
  2. Verfahren gemäß Anspruch 1, dadurch gekennzeichnet, dass vor dem Falzen der ausgeschnittenen Platte (14, 20) das Tiefziehen zumindest eines Bereiches (22) der Metallplatte (14, 20) durchgeführt wird.
  3. Verfahren gemäß irgendeinem der Ansprüche 1 und 2, dadurch gekennzeichnet, dass die Verschweißung mit Hilfe eines Laserstrahls und vorzugsweise in Transparenz durch den komplementären Überlappungs- und Befestigungsbereich jedes Teilstücks (19) und den komplementären Bereich zur Befestigung der Teilstücke (19) aneinander und zumindest einen Bereich aus der Gruppe des gefalzten Bereiches einer Wand des Strukturbauteils (11, 18) und eines zweiten Überlappungsbereiches hindurch ausgeführt wird.
  4. Verfahren gemäß irgendeinem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Bogen aus Metallmaterial eine Dicke zwischen 0,05 und 1 mm aufweist.
  5. Strukturbauteil mit einer allgemein rohrförmigen Metallwand mit polygonalem Querschnitt, welches zumindest zwei nicht axial miteinander ausgerichtete Teilstücke aufweist, wobei das Bauteil eine Vielzahl von Wandbereichen (24, 24', 25, 26) in Winkelanordnungen zueinander aufweist, welche durch Falzlinien auf einer gleichen Metallplatte (20) getrennt sind, dadurch gekennzeichnet, dass es zumindest einen komplementären Überlappungs- und Befestigungsbereich (17, 27, 27', 28) für jedes Teilstück (19) sowie einen komplementären Befestigungsbereich für die Teilstücke (19) aneinander aufweist, die übereinander angeordnet und durch zumindest eine Schweißlinie oder einen Schweißpunkt (29, 30) in Überlappung an zumindest einem Bereich aus der Gruppe eines Wandbereiches (24, 24', 25, 26) und eines zweiten Überlappungsbereiches des Bauteils befestigt sind, wobei das gesamte Strukturbauteil (11, 18) einzig durch zumindest einen Schweißpunkt oder eine Schweißlinie (29, 30) zumindest eines Überlappungsbereiches jedes Teilstücks (19) und zumindest eines Bereiches zur Befestigung (17) der Teilstücke (19) miteinander in übereinander gelegter Position und in elastischer Auffage auf zumindest einem Bereich aus der Gruppe des Wandbereiches und des zweiten Überlappungs- und Befestigungsbereiches zusammengesetzt und versteift ist.
  6. Strukturbauteil gemäß Anspruch 5, dadurch gekennzeichnet, dass es vollständig oder teilweise eines der folgenden Elemente bildet: Zargenrahmen für den Bau, Tür, Fenster, Doppelverglasungseinfassung, Rahmen oder Tür für elektrischen Schrank oder elektrisches Gehäuse, Siebdruckrahmen für Druckmaschine, Strukturteil für den Automobil-, Schiffs- oder Flugzeugbau, Karosserie, Chassis für Kraftfahrzeuge, Flugwerk, Flugzeugrümpfe, widerstandsfähige Käfigwicklungsstrukturen für Kraftfahrzeuge, Armaturen und Haltestrukturen für den Metallbau, komplexes gebogenes Profil mit polygonalem Querschnitt, ringförmiges Teil mit polygonalem Hohlquerschnitt, Wärmetauscherelement.
EP01955416A 2000-07-17 2001-07-12 Verfahren zur herstellung eines strukturbauteils mit einer rohrförmigen metallwand und strukturbauteil Expired - Lifetime EP1301292B1 (de)

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FR0009334A FR2811741B1 (fr) 2000-07-17 2000-07-17 Procede de fabrication d'un element de structure ayant une paroi metallique de forme generale tubulaire et element de structure
FR0009334 2000-07-17
PCT/FR2001/002278 WO2002005979A1 (fr) 2000-07-17 2001-07-12 Procede de fabrication d'un element de structure ayant une paroi metallique de forme generale tubulaire et element de structure

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DE60105615T2 (de) 2005-02-03
WO2002005979A1 (fr) 2002-01-24
TW500890B (en) 2002-09-01
US20050127142A1 (en) 2005-06-16
FR2811741B1 (fr) 2003-06-27
US7381476B2 (en) 2008-06-03
CN1246097C (zh) 2006-03-22
US20030150114A1 (en) 2003-08-14
AU2001277587A1 (en) 2002-01-30
ATE276057T1 (de) 2004-10-15
WO2002005979B1 (fr) 2002-03-21
KR100698562B1 (ko) 2007-03-21
JP4617055B2 (ja) 2011-01-19
DE60105615D1 (de) 2004-10-21
CN1443098A (zh) 2003-09-17
KR20030045776A (ko) 2003-06-11
JP2004504148A (ja) 2004-02-12
FR2811741A1 (fr) 2002-01-18
US6814275B2 (en) 2004-11-09

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