Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B64—AIRCRAFT; AVIATION; COSMONAUTICS
  • B64C—AEROPLANES; HELICOPTERS
  • B64C1/00—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like
  • B64C1/06—Frames; Stringers; Longerons ; Fuselage sections
  • B64C1/061—Frames
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B64—AIRCRAFT; AVIATION; COSMONAUTICS
  • B64C—AEROPLANES; HELICOPTERS
  • B64C1/00—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like
  • B64C1/06—Frames; Stringers; Longerons ; Fuselage sections
  • B64C1/068—Fuselage sections
  • B64C1/069—Joining arrangements therefor
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B64—AIRCRAFT; AVIATION; COSMONAUTICS
  • B64C—AEROPLANES; HELICOPTERS
  • B64C1/00—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like
  • B64C2001/0054—Fuselage structures substantially made from particular materials
  • B64C2001/0081—Fuselage structures substantially made from particular materials from metallic materials

Definitions

• Coupling element for connecting two longitudinal stiffening elements
• the invention relates to a coupling element for connecting two longitudinal stiffening elements, in particular stringers with a T-shaped, Z-shaped or ⁇ -shaped cross-sectional geometry, in particular for joining two fuselage sections of an aircraft by means of at least one cross-brace to form a transverse seam, both fuselage sections with a trunk cell skin are provided and have a plurality of longitudinal stiffening elements and annular frames.
• Each fuselage section comprises a multiplicity of ring frames which are preferably arranged uniformly one behind the other and which are covered with a circumferential fuselage cell skin.
• a plurality of longitudinal stiffening elements is connected to the fuselage skin between each two annular frames.
• the longitudinal stiffening elements which are usually so-called “stringer” or stringer profiles, essentially run parallel to a longitudinal axis of the fuselage section and are evenly spaced on the inside over the circumference of the fuselage section 15309 / 2007-312ST 13.11.2008
• the respectively mutually parallel longitudinal stiffening elements or stringer profiles can have a Z-shaped, an L-shaped, an ⁇ -shaped or other cross-sectional geometries.
• Both the hull cell skin, as well as the annular frames and the longitudinal stiffening elements can be formed with an aluminum alloy material, with a fiber-reinforced plastic material such as a carbon fiber reinforced epoxy resin or in a so-called hybrid construction with a combination of said materials.
• a plurality of further components is required to connect two fuselage sections to form a respective circumferential cross seam.
• the fuselage cell skins are first connected to an at least partially circumferential cross-brace preferably on impact.
• An encircling annular frame positioned in the region of the transverse seam is joined together with a multitude of cleats arranged at the circumference of the ring frame, so-called "cleats", with the crossbeam flap and at least one of the two adjoining trunk cell skins.
• the remaining ring members outside the transverse seam areas of the fuselage section can also be connected to the fuselage cell skin with such "cleats”.
• the opposing stringer in the region of a transverse seam are connected to a plurality of stringers clutches.
• a plurality of support elements are provided, 15309 / 2007-312ST 13.11.2008
• the support brackets and stringer couplings for each transverse joint are to be provided and assembled between two fuselage sections in a number of pieces, which generally corresponds to the number of stringers installed in the fuselage section.
• the number of stringers required to stiffen a fuselage section generally increases in proportion to their cross-sectional dimensions, so that the assembly effort for fuselage cells with large cross-sectional dimensions increases considerably.
• all wells must undergo elaborate sealing and corrosion protection procedures.
• connecting elements depending on the types of material used for the fuselage sections to be joined, for example, rivet elements or screws come into consideration.
• thermal joining methods can be used.
• fiber-reinforced plastic materials can alternatively also be joined by adhesive bonds, so that the introduction of fastening bores is dispensable.
• the object of the invention is to provide a coupling element for stringers, by which the number of 15309 / 2007-312ST 13.11.2008
• Coupling elements can be reduced to produce a transverse joint between two fuselage sections to be joined together to minimize the assembly effort in assembling fuselage sections to a complete fuselage cell for aircraft.
• a coupling element is provided with a foot flange for connecting the two longitudinal stiffening elements to be joined and one arranged on the base flange and extending at an angle to this flange for connecting a ring wasps.
• the center planes of the crabsches and the Spantflansches can run perpendicular to each other.
• the foot flange and the bulkhead flange are in particular formed plate-shaped and can be made in one piece in particular.
• Longitudinal stiffening elements in particular two stringers, and a thereto for angular and in particular substantially perpendicularly arranged flange for connecting a ring frame, is a separate installation of support brackets for securing the ring frame against lateral tilting movements in relation to the fuselage skin 15309 / 2007-312ST 13.11.2008
• the coupling element according to the invention for the connection of stringers assumes in a single integral component equally the function of joining the stringer, the connection of the stringer to the fuselage skin or the Querstosslasche and an additional Verkippêt the ring frame.
• a longitudinal side of the foot flange is in a substantially triangular and substantially perpendicular, i. 90 ° ⁇ 15 °, stationary surface element or connecting piece, to which the flange flange adjoins at an angle and in particular at an angle of 90 ° ⁇ 15 °.
• the foot flange is formed in particular as an elongated plate, and from an edge of the practicflansches also extends the plate-shaped connector.
• the center planes of the foot flange and the connecting piece extend at an angle and in particular at an angle of 90 ° ⁇ 15 ° to each other.
• the exposed edge lines are in particular at an angle to each other, wherein the exposed edge lines are formed in sections in a straight line and their directions starting from the Flußflansch run at an acute angle to each other.
• One or both of the exposed edge lines may also be curved, with the above-mentioned directions being from the centroid lines of the respective edge line.
• the foot flange, the bulkhead flange and the connecting piece located between these are in particular plate-shaped and can in particular together form a one-piece manufactured component.
• This embodiment allows a simple production of the coupling element, which comprises, for example, in the case where the coupling element is formed with an aluminum alloy material, in addition to further, in particular machining steps, only two forming steps for forming the perspectiveflansches and the Spantflansches.
• a development of the coupling element provides that the surface element is positioned to form the Spantflansches substantially centrally on the base flange. As a result of this arrangement, a statically favorable introduction of the overturning moments of the Ringpants in the perspectiveflansch of the coupling element and thus in the stringer and the underlying fuselage skin is possible.
• the coupling element is designed in one piece and in particular made in one piece.
• the coupling element is already provided on the production side with a plurality or plurality of precisely positioned holes for the introduction of connecting elements.
• the precisely pre-positioned holes facilitate the alignment of the coupling element in the region of the transverse seam when joining the fuselage sections.
• the holes for guiding the drilling tool when introducing the required mounting holes in structural elements of the fuselage sections contribute.
• the structural elements are, inter alia, the two fuselage skin cells preferably to be joined on impact, the ring frame, the cleats for connecting the ring frame 15309 / 2007-312ST 13.11.2008
• the plurality of bores which are introduced in the form of a bore pattern within the coupling element, moreover allow a location variable mounting of the coupling element or a spatially flexible connection of the structural elements to the coupling element.
• the surface element has an extension flange, in particular for the lateral connection of stringers with a T-shaped or a Z-shaped cross-sectional geometry, wherein the extension flange is substantially perpendicular to the base flange.
• This embodiment of the coupling element allows in addition to the connection of the stringer with each other in the area of the Stringerfußes and with the trunk skin or the Querstosslaschen a connection between at least one substantially perpendicular to the fuselage cell skin Stringer flank with the coupling element, whereby the mechanical strength of the stringer connected by the coupling element if necessary, further increased.
• Coupling element of an embodiment according to the invention provided.
• Fig. 1 a coupling element for
• Fig. 2 shows a variant of the coupling element
• Fig. 3 is a perspective view of the first embodiment in the installed state in the region of a transverse seam between two fuselage sections joined together.
• Fig. 1 shows a coupling element according to the invention in a perspective view.
• the one-piece coupling element 1 comprises: an elongate base flange 2 with preferably parallel longitudinal edges for connecting a longitudinal reinforcement element not shown in FIG. 1, in particular a stringer, and a flange flange 3 for connecting a ring frame (not shown) in a fuselage section of an aircraft.
• the bulkhead flange 3 includes at an angle 4 of about 90 °, in particular of 90 ° ⁇ 15 °, to a 15309 / 2007-312ST 13.11.2008
• the foot flange 2 may have a substantially rectangular geometry with two longitudinal edges parallel to each other, i. Longitudinal edges or longitudinal sides have 7,8, wherein the Spantflansch 3 and the particular triangular surface element 6 on the (rear) longitudinal side 7 connect.
• a raised edge 9 is provided to increase the bending stiffness of the contemplatflansches 2, from the edge of which the connecting piece 5 extends.
• the width of the upstand is less than 20% of the width of theticianflansches 2.
• the upstand is preferably provided with an angle of 90 ° ⁇ 15 °.
• the surface element 5 comprises an inclined with respect to the direction of the longitudinal edge 8 of theticianflanschens 2, ie angularly extending bevel 10, with respect to the direction of the longitudinal edge 7 perpendicular to this or at an angle of 90 ° ⁇ 15 ° extending trailing edge 11 and a Angled and in particular approximately perpendicular (90 ° ⁇ 15 °) to the base flange 2 (to the median plane of the same) extending Kantline 12, where the Spantflansch 3 connects to the surface element 5 or in which the Spantflansch 3 merges into the surface element 5.
• the edge line 10 at an angle of 90 ° ⁇ 15 ° to the median plane of the contemplatflansches in its longitudinal extent.
• the crease line 12 runs approximately in the area of a center line 13 which divides the foot flange 2 in half, that is to say in FIG. the extension of the crease line 10 hits the plane of the foot flange in a range of 20% of the longitudinal extent of the foot flange, laterally of its center line with respect to its longitudinal extent.
• the described positioning of the triangular surface element 5 or of the flange flange 3 arranged thereon on the base flange 2 enables a statically favorable introduction of tilting moments, which are introduced starting from the flange flange 3 into the coupling element 1 or the base flange 2.
• Both the foot flange 2 and the flange 3 are provided with a plurality of holes, of which only a bore 14 is representative of the others provided with a reference numeral.
• the holes 14 are preferably grid-shaped in the base flange 2 and the bulkhead flange 3 introduced to a locally variable positioning of the coupling element 1 and / or a flexible connection of other components to the
• coupling element 1 To enable coupling element 1.
• the holes are used to carry out in Fig. 1, not shown, fasteners, such as rivets, screws or the like.
• the coupling element can also be connected to the other components of the fuselage cell structure by means of thermal welding methods. 15309 / 2007-312ST 13.11.2008
• the coupling element 1 may be formed with an aluminum alloy material, with a titanium alloy, a stainless steel alloy, with a fiber reinforced plastic material, with Glare ®, or any combination of the above materials.
• the material Glare ® is a multi-layered layer structure in which the layers of aluminum alloy material are bonded to each other by full-area adhesive layers.
• fiber-reinforced plastic materials are preferably carbon fiber reinforced epoxy resins into consideration.
• the adhesive layers may be formed, for example, with a glass fiber reinforced polyester or epoxy resin.
• FIG. 2 shows a variant of the coupling element according to the invention.
• a coupling element 15 includes, inter alia, a base flange 16 and a flange 17, which are each formed plate-shaped.
• the bulkhead flange 17 connects at an angle 18 to an approximately triangular surface element 19. Between the surface element 19 and the researchingflansch 16 there is an angle 20 of 90 ° ⁇ 15 °, ie the mid-planes seen in the longitudinal extent are at an angle of 90 ° ⁇ 15 ° to each other.
• the foot flange 16 preferably has a rectangular shape with two longitudinal sides 21,22 extending parallel to one another and transverse sides not provided with reference numerals, wherein an upstand 23 is provided in the region of the left long side 21 in the plan view of FIG. The upstand is one with 15309 / 2007-312ST 13.11.2008
• the surface element or the connecting piece 19 comprises: an obliquely extending between the adjacent longitudinal edge of the contemplatflansches and a side edge of the Spantflansches obliquely 24 and a preferably to the median plane of the solicitflansches 16 at an angle of 90 ° ⁇ 15 ° and in particular 90 ° extending trailing edge 25th and a with respect to the median plane of the researchingflansch 16, seen in its longitudinal direction, at an angle of 90 ° ⁇ 15 ° and in particular 90 ° extending edge line 26.
• the bevel 24 can at an angle of 30 to 60 ° to the median plane of the contemplatflansch 16th , seen in the longitudinal direction, run.
• the canted line 26 forms an "imaginary" dividing line between the flange flange 17 and the surface element 19, ie in the canted line go the flange flange 17 and the surface element 19, which are integrally formed or manufactured together.
• Both the base flange 16 and the bulkhead flange 17 are provided with a plurality of holes 28.
• the coupling element 15 has an extension flange 29 with a plurality of bores 30, otherwise in a similar construction.
• the extension flange 29 is in the connection region between the longer exposed edge of the connecting piece 19 and
• the base flange 16 preferably has a substantially L-shaped cross-sectional geometry, whereas the cross-sectional geometry of the base flange 16 in FIG the rest of the areas - except for the slight upturn 23 - is substantially rectangular.
• Extension flange 29 represents practically a one-sided "continuation" of the substantially triangular surface element 19.
• the holes 18,30 can be omitted at least partially.
• extension flange 29 By means of the extension flange 29, it is possible to use stringer profiles (not shown) in the fuselage sections (see Fig. 3) not only in the region of the stringer base, but additionally in the region of a stringer flank substantially perpendicular to the stringer base Coupling element 15 too 15309 / 2007-312ST 13.11.2008
• FIG. 3 shows a coupling element configured in accordance with the representation of FIG. 1 in the installed state in a transverse seam area between two fuselage sections of a fuselage cell structure of an aircraft in a perspective view.
• a fuselage cell structure 31 comprises inter alia two fuselage sections 32, 33, which are joined together in the region of a transverse seam 34.
• the fuselage cell skins 35, 36 of the two fuselage sections 32, 33 are joined together by means of a conventional transverse joint lug 37 with simultaneous creation of the transverse seam 34.
• On the fuselage cell skins 35,36 a plurality of stringers 38,39 are arranged or attached as longitudinal stiffening elements.
• the stringers 38,39 are aligned in the region of the transverse seam 34, which also applies to the other stringer pairings in the transverse seam region, in order to ensure a largely stress-free connection by means of the coupling elements according to the invention.
• cleats In the region of the transverse seam 34, a plurality of (connecting) cleats (so-called “cleats”), of which only one cleat 40 is provided with a reference number, are provided.
• a ring frame 41 or a ring frame segment is connected to the fuselage cell skins 35, 36 by means of a multiplicity of rivet elements, of which only one rivet element is provided with a reference numeral 42, representative of the remainder, via the cleats 40 and the transverse brishlet 37 running underneath.
• the stringers 38, 39 each have an inverted T-shaped cross-sectional geometry.
• the middle front stringer 38 - representative of all others - a vertical web 43, which is provided at a lower end with adjoining on both sides, each pointing opposite foot flanges 44,45.
• the right foot flange 45 of the stringer 38 is connected to a foot flange 46 of a coupling element 47.
• a bulkhead 48 of the coupling element 47 is connected to the cleat 40 and the annular frame 41.
• the structural design of the coupling element 47 is identical to that of the already explained in the description of Fig. 1 structural design of the coupling element 1.
• About a substantially triangular surface element 49 tilting moments and forces of the ring pads 41 in the direction of an arrow 50 from the bulkhead 48 by means of the surface element 49 is transferred to the base flange 46 of the coupling element 47.
• Coupling member 47, the right foot flange 45 of the stringer 38 and the underlying fuselage skin 35 is preferably carried out by rivet elements, of which a rivet member 51 is representatively provided with a reference numeral for all others.
• a rivet member 51 is representatively provided with a reference numeral for all others.
• All rivet elements 42,51 and bores for the rivet elements 42,51 are preferably arranged in a grid pattern to a rasterized or stepped location-variable attachment of Coupling element 47 in relation to other components of the fuselage cell structure 31 to allow.
• the left foot flange 44 of the front stringer 38 is connected to the rear stringer 39 by a plurality of rivet members 53 via a simple, rectangular, or band-shaped coupling element 52 (partially concealed).
• rivet elements 42,51,53 can be used as connecting elements, for example screws, clamps or the like.
• at least a partial bonding of at least part of the above-described components (fuselage cell skins, stringers, annular frames, cleats, coupling elements) representing the fuselage cell structure 31 is conceivable.
• all of the components of the fuselage cell structure 31 may be formed of an aluminum alloy, a titanium alloy, a stainless steel alloy, a fiber reinforced plastic material, or any combination thereof. Fiber reinforced plastics 15309 / 2007-312ST 13.11.2008
• the alternative embodiment variant of the coupling element 15 according to FIG. 2 with an extension flange in the region of the surface element also allows a mechanical connection of a vertical web of the stringer or a vertical (side) flank beyond a mere connection of the Stringerfußflansches addition.
• This embodiment variant is therefore provided in particular in the case of the static requirement for stringer with an inverted T-shaped or Z-shaped cross-sectional geometry (so-called "stringer web connection").
• the coupling elements 1,15,47 for connecting stringers the function of assembling the stringer By the coupling elements 1,15,47 for connecting stringers the function of assembling the stringer, the connection of the stringer to the fuselage cell skin or to the crossbar and the anti-tip device of the ring frame in the area of the crossbar between the fuselage sections is realized at the same time in an integral component , so that the number of components to be joined together are reduced in creating a transverse joint between two fuselage sections and the same amount of assembly work.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Aviation & Aerospace Engineering (AREA)
• Connection Of Plates (AREA)
• Moulding By Coating Moulds (AREA)
• Wire Processing (AREA)
• Joining Of Building Structures In Genera (AREA)
• Mutual Connection Of Rods And Tubes (AREA)
• Tires In General (AREA)

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ID=40560613

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Citations (6)

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• 2007
  • 2007-11-13 DE DE102007054053A patent/DE102007054053A1/de not_active Ceased
• 2008
  • 2008-11-13 EP EP08849841A patent/EP2212191B1/de not_active Not-in-force
  • 2008-11-13 CN CN200880115949.9A patent/CN101883717B/zh not_active Expired - Fee Related
  • 2008-11-13 US US12/742,206 patent/US8353479B2/en not_active Expired - Fee Related
  • 2008-11-13 BR BRPI0820563A patent/BRPI0820563A2/pt not_active IP Right Cessation
  • 2008-11-13 WO PCT/EP2008/009595 patent/WO2009062712A1/de not_active Ceased
  • 2008-11-13 CA CA2705426A patent/CA2705426A1/en not_active Abandoned
  • 2008-11-13 AT AT08849841T patent/ATE531617T1/de active
  • 2008-11-13 JP JP2010533495A patent/JP2011502871A/ja not_active Withdrawn
  • 2008-11-13 RU RU2010123690/11A patent/RU2479466C2/ru not_active IP Right Cessation

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