DE102007026296A1 - Honeycomb core, in particular for a sandwich component, of at least two interconnected honeycomb core parts and method for its production - Google Patents
Honeycomb core, in particular for a sandwich component, of at least two interconnected honeycomb core parts and method for its production Download PDFInfo
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- DE102007026296A1 DE102007026296A1 DE102007026296A DE102007026296A DE102007026296A1 DE 102007026296 A1 DE102007026296 A1 DE 102007026296A1 DE 102007026296 A DE102007026296 A DE 102007026296A DE 102007026296 A DE102007026296 A DE 102007026296A DE 102007026296 A1 DE102007026296 A1 DE 102007026296A1
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- honeycomb core
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
- B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
- B29C66/022—Mechanical pre-treatments, e.g. reshaping
- B29C66/0224—Mechanical pre-treatments, e.g. reshaping with removal of material
- B29C66/02241—Cutting, e.g. by using waterjets, or sawing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/114—Single butt joints
- B29C66/1142—Single butt to butt joints
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
- B29C66/22—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being in the form of recurring patterns
- B29C66/227—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being in the form of recurring patterns being in the form of repetitive interlocking undercuts, e.g. in the form of puzzle cuts
- B29C66/2272—Teardrop-like, waterdrop-like or mushroom-like interlocking undercuts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
- B29C66/725—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being hollow-walled or honeycombs
- B29C66/7254—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being hollow-walled or honeycombs honeycomb structures
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
- E04C2/34—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure composed of two or more spaced sheet-like parts
- E04C2/36—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure composed of two or more spaced sheet-like parts spaced apart by transversely-placed strip material, e.g. honeycomb panels
- E04C2/365—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure composed of two or more spaced sheet-like parts spaced apart by transversely-placed strip material, e.g. honeycomb panels by honeycomb structures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
- F16B5/01—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening elements specially adapted for honeycomb panels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
- B29C65/565—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits involving interference fits, e.g. force-fits or press-fits
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
- B29C66/721—Fibre-reinforced materials
- B29C66/7212—Fibre-reinforced materials characterised by the composition of the fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/731—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the intensive physical properties of the material of the parts to be joined
- B29C66/7313—Density
- B29C66/73132—Density of different density, i.e. the density of one of the parts to be joined being different from the density of the other part
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
- F16B5/07—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of multiple interengaging protrusions on the surfaces, e.g. hooks, coils
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Laminated Bodies (AREA)
Abstract
Die Erfindung betrifft einen Wabenkern (10), insbesondere für ein Sandwichbauteil, der aus wenigstens zwei miteinander verbundenen Wabenteilen (12, 14) besteht. Zur Gewichtseinsparung sind jeweils zwei Wabenkernteile (12, 14) an einander zugewandten Rändern (16, 22) mittels einer Wabenkernverzahnung (24) zusammengefügt.The invention relates to a honeycomb core (10), in particular for a sandwich component, which consists of at least two interconnected honeycomb parts (12, 14). In order to save weight, two honeycomb core parts (12, 14) are joined together at mutually facing edges (16, 22) by means of a honeycomb core toothing (24).
Description
Die vorliegende Erfindung betrifft einen Wabenkern, der aus wenigstens zwei miteinander verbundenen Wabenkernteilen besteht, sowie ein Verfahren zur Herstellung eines solchen Wabenkernes.The The present invention relates to a honeycomb core consisting of at least consists of two interconnected honeycomb core parts, as well as a Process for producing such a honeycomb core.
Sogenannte Wabenkerne, auch Wabeneinlagen genannt, sind ein wesentlicher Bestandteil von Sandwichbauteilen, z. B. Sandwichplatten. Sandwichplatten, die aus einem mit dünnwandigen Beplankungen versehenen Wabenkern bestehen, zeichnen sich durch eine hohe Steifigkeit und Biegefestigkeit bei geringem Gewicht aus. Aufgrund dieser Eigenschaften werden Sandwichplatten in vielen Bereichen der Technik eingesetzt, beispielsweise im Flugzeugbau, Fahrzeugbau, in der Raumfahrt und im Bauwesen. Besondere Bedeutung haben Sandwichplatten z. B. für die Innenausstattung von Flugzeugen. So bestehen in heutigen Verkehrsflugzeugen etwa die Wände der zumeist als Überkopfgepäckfächer ausgebildeten Gepäckablagesysteme in der Passagierkabine eines Flugzuges aus Sandwichplatten, in denen zwischen zwei Deckplatten aus glasfaser- und/oder kohlefaserverstärkten, mit Kunstharz imprägnierten Verbundlaminaten ein Wabenkern aus mit Kunstharz imprägnierten Papierwaben angeordnet ist. Derartig ausgeführte Sandwichplatten oder Sandwichbauteile sind sehr leicht und dennoch stabil. Im Rahmen des Strebens nach einer allgemeinen Gewichtsreduzierung von Flugzeugen besteht aber auch hinsichtlich solcher Sandwichbauteile der Wunsch, diese noch leichtgewichtiger als bisher auszuführen, ohne dabei ihre Stabilität im praktischen Einsatz zu verschlechtern.So-called Honeycomb cores, also called honeycomb inserts, are an essential component of sandwich components, eg. B. sandwich panels. Sandwich panels, the from a thin-walled one Plank provided honeycomb core exist, stand out a high rigidity and flexural strength at low weight. Because of these properties, sandwich panels are used in many areas used in technology, for example in aircraft construction, vehicle construction, in space travel and construction. Particular importance is attached to sandwich panels z. For example the interior of aircraft. So exist in today's commercial aircraft about the walls the most trained as overhead luggage compartments Luggage Storage Systems in the passenger cabin of a flight of sandwich panels in which between two cover plates made of fiberglass and / or carbon fiber reinforced, with Resin impregnated Composite laminates a honeycomb core impregnated with synthetic resin Paper honeycomb is arranged. Such exported sandwich panels or sandwich components are very light and yet stable. In the context of the pursuit However, a general weight reduction of aircraft is also With regard to such sandwich components, the desire to make them even more lightweight to execute as before, without losing its stability to deteriorate in practical use.
Der Erfindung liegt die Aufgabe zugrunde, für diese Problemstellung eine Lösung anzugeben.Of the Invention is based on the object for this problem a solution specify.
Erfindungsgemäß ist diese Aufgabe ausgehend von einem Wabenkern, der aus wenigstens zwei miteinander verbundenen Wabenkernteilen besteht, dadurch gelöst, dass jeweils zwei Wabenkernteile an einander zugewandten Rändern mittels einer Wabenkernverzahnung zusammengefügt bzw. zusammengesteckt sind. Jeweils zwei solchermaßen zusammengesteckte Wabenkernteile bilden demnach an ihren zusammengefügten Rändern eine Verbindung, die aufgrund der Verzahnung zu einer schubfesten Verbindung der beiden Wabenkernteile führt, ohne dass die beiden Wabenkernteile an ihrer Verbindungsstelle, auch als Stoßstelle bezeichnet, wie bisher üblich miteinander verklebt sein müssen. Bereits durch diesen Verzicht auf Klebstoff an der Verbindungsstelle wird eine deutliche Gewichtseinsparung des mit einem erfindungsgemäßen Wabenkern versehenen Sandwichbauteils erreicht. Falls gewünscht, kann ein erfindungsgemäßer Wabenkern an der oder den Verbindungsstellen zwischen Wabenkernteile(n) zusätzlich mit einer dünnen Klebstoffschicht, die viel dünner als bisher übliche Klebstofffugen ist, gesichert werden, jedoch ist dies zur Erzielung einer schubfesten Verbindung der Wabenkernteile untereinander nicht erforderlich. Vorzugsweise ist die Wabenkernverzahnung als hinterschnittene Formschlussverbindung ausgebildet. Mit dem Begriff "hinterschnitten" bzw. "Hinterschneidung" ist im Rahmen der vorliegenden Erfindung insbesondere eine Hinterschneidung im Bereich der seitlichen Flanken der Wabenkernverzahnung gemeint, d. h. die Hinterschneidung ist so ausgeführt, dass zwei in einer Ebene zusammengefügte Wabenkernteile sich durch eine in dieser Ebene auftretende Zugbelastung nicht voneinander lösen, weil der durch die Hinterschneidung erzeugte Formschluss zwischen den beiden Wabenkernteilen dies verhindert.According to the invention this is Task starting from a honeycomb core, which consists of at least two together connected honeycomb core parts, thereby solved, that in each case two honeycomb core parts on mutually facing edges are joined together by means of a honeycomb core toothing. In each case two so assembled Honeycomb core parts therefore form one at their joined edges Connection, due to the gearing to a shear-resistant connection leads the two honeycomb core parts, without the two honeycomb core parts at their connection point, also as a joint referred to as usual must be glued together. Already by doing without glue at the joint will a significant weight saving of the invention with a honeycomb core attained provided sandwich component. If desired, a honeycomb core according to the invention may be used the or the joints between honeycomb core parts (s) in addition to a thin one Adhesive layer, which is much thinner as usual Adhesive joints is to be secured, but this is to achieve a shear-resistant connection of the honeycomb core parts with each other not required. The honeycomb core toothing is preferably an undercut positive connection educated. The term "undercut" or "undercut" is used in the context of present invention, in particular an undercut in the area the lateral flanks of the honeycomb core toothing meant d. H. the Undercut is executed that two honeycomb core parts assembled in one plane are separated by a in this plane occurring tensile load does not solve each other, because the interlock created by the undercut between the this prevents both honeycomb core parts.
Bei großflächigen Sandwichbauteilen ermöglicht es die Erfindung zudem, deren Gewicht deutlich zu reduzieren, indem Wabenkernteile mit voneinander verschiedener Dichte verwendet werden. Beispielsweise können in solchen Bereichen eines Sandwichbauteils, in denen die Festigkeitsanforderungen geringer als in anderen Bereichen sind, Wabenkernteile mit geringerer Dichte und dementsprechend geringerer Zugfestigkeit bzw. Druckfestigkeit zum Einsatz kommen, ohne dass dies nachteilige Auswirkungen auf die praxisrelevante Stabilität des Gesamtbauteils hat. Wabenkerne, die aus mehreren Wabenkernteilen mit unterschiedlichem Flächengewicht bestehen, kombinieren also den Vorteil des Wegfalls einer Klebstofffuge zwischen den Wabenkernteilen mit dem Vorteil einer belastungsabhängig optimal gewählten Wabenkernteilausführung und ermöglichen es somit, insbesondere große Sandwichbauteile deutlich leichtgewichtiger als bisher auszuführen.at large-area sandwich components allows It also the invention to reduce their weight significantly by Honeycomb core parts are used with mutually different density. For example, you can in such areas of a sandwich component, where the strength requirements less than in other areas, honeycomb core parts are lower Density and accordingly lower tensile strength or compressive strength are used without this having an adverse effect the practice-relevant stability of the entire component has. Honeycomb cores consisting of several honeycomb core parts with different basis weight exist, so combine the advantage of the elimination of an adhesive joint between the honeycomb core parts with the advantage of a load-dependent optimal selected Honeycomb core partial execution and allow it thus, in particular large Sandwich components significantly lighter than previously run.
Erfindungsgemäß sind die Wabenkernteile, wie bei Sandwichbauteilen allgemein üblich, im Wesentlichen flächig, d. h. ihre Höhe ist im Verhältnis zu ihrer Länge und Breite gering. Vorzugsweise bestehen die Wabenkernteile aus kunstharzimprägnierten Papierwaben, die mit Aramidfasern verstärkt sein können. Die Papierwaben haben vorzugsweise einen rechteckigen oder sechseckigen Querschnitt, andere Wabenquerschnitte sind jedoch möglich.According to the invention Honeycomb core parts, as common in sandwich components, in Essentially flat, d. H. their height is in proportion to their length and width low. Preferably, the honeycomb core parts are made resin-impregnated paper honeycomb, reinforced with aramid fibers could be. The paper honeycombs preferably have a rectangular or hexagonal Cross-section, other honeycomb sections are possible.
Bei bevorzugten Ausführungsformen erfindungsgemäßer Wabenkerne besteht die Wabenkernverzahnung aus Vorsprüngen und den Vorsprüngen zugeordneten korrespondierenden Ausnehmungen. Jedem Vorsprung am Rand eines Wabenkernteiles ist demnach eine korrespondierende Ausnehmung am zugewandten Rand des anderen Wabenkernteiles zugeordnet. Das sich so ergebende Profil projiziert die Verbindungsstelle zwischen zwei Wabenkernteilen auf eine Fläche, so dass jegliche Belastung in der Ebene des Wabenkerns auf einen Verbindungsbereich verteilt wird. Die Stoßkante zwischen zwei miteinander verbundenen Wabenkernteilen wirkt deshalb nicht mehr als Sollbruchstelle wie im Stand der Technik, bei dem die Verbindungsstelle zwischen zwei Wabenkernteilen eine gerade Linie bildet. Durch das geschwungene Profil der Stoßkante erfindungsgemäß miteinander verbundener Wabenkernteile tritt keine gerade Rissfortpflanzung mehr auf, sondern die Rissfortpflanzung ist lokal begrenzt. Die Festigkeit an der Verbindungsstelle, d. h. die zulässigen Spannungen, ist deshalb erfindungsgemäß nur geringfügig niedriger als die Festigkeit der jeweils ungestörten Bereiche der Wabenkernteile selbst.In preferred embodiments of honeycomb cores according to the invention, the honeycomb core toothing consists of protrusions and corresponding recesses associated with the protrusions. Each projection on the edge of a honeycomb core part is therefore associated with a corresponding recess on the facing edge of the other honeycomb core part. The resulting profile projects the joint between two honeycomb core parts onto a surface so that any stress in the plane of the honeycomb core is distributed to a joint region. The butt edge between Therefore, two interconnected honeycomb core parts no longer acts as a predetermined breaking point as in the prior art, in which the junction between two honeycomb core parts forms a straight line. Due to the curved profile of the abutting edge according to the invention interconnected honeycomb core parts occurs no more straight crack propagation, but the crack propagation is localized. The strength at the connection point, ie the allowable stresses, is therefore only slightly lower than the strength of the undisturbed areas of the honeycomb core parts according to the invention.
Gemäß einer Ausführungsform sind die Vorsprünge am Rand des einen Wabenkernteiles und die korrespondierenden Ausnehmungen am zugewandten Rand des anderen Wabenkernteiles angeordnet. Bei besonders bevorzugten Ausgestaltungen erfindungsgemäßer Wabenkerne bestehen die einander zugewandten Ränder der Wabenkernteile zumindest abschnittsweise aus unmittelbar aufeinander folgenden, alternierend angeordneten Vorsprüngen und Ausnehmungen, die mit den Vorsprüngen des gegenüberliegenden Randes korrespondieren. Die Verbindungsstelle zwischen zwei Wabenkernteilen bekommt damit zumindest abschnittsweise ein wellenförmiges Profil, welches zu einer vorteilhaften, sehr gleichmäßigen Verteilung von Belastungen im Verbindungsbereich führt. Am bevorzugtesten ist die gesamte Wabenkernverzahnung wie zuvor beschrieben ausgestaltet.According to one embodiment are the tabs at the edge of a honeycomb core part and the corresponding recesses arranged on the facing edge of the other honeycomb core part. at Particularly preferred embodiments of honeycomb cores according to the invention at least the mutually facing edges of the honeycomb core parts partially from immediately following, alternating arranged projections and Recesses with the projections the opposite Randes correspond. The junction between two honeycomb core parts gets thus at least partially a wave-shaped profile, which leads to a advantageous, very even distribution of loads in the connection area leads. Most preferred the entire honeycomb gearing designed as described above.
Unabhängig von der genauen Anordnung und Form der Vorsprünge sind vorteilhaft an wenigstens einem der beiden zu verbindenden Ränder die Vorsprünge zumindest lokal geringfügig größer als die korrespondierenden Ausnehmungen. Beim Zusammenfügen solcher mit zumindest lokalem Übermaß ausgeführter Vorsprünge kommt es im Bereich der Stoßkante zu einer Materialstauchung des weniger steifen Fügepartners (bei gleich steifen Fügepartnern verteilt sich die Stauchung auf beide Fügepartner) und einem Rückfederungseffekt nach dem Zusammenfügvorgang, wodurch im Bereich der Stoßfuge ein zusätzlicher Verzahnungseffekt auftritt und die Stoßfuge sicher mit Wabenstegen gefüllt ist. Ein Übermaß, das gegebenenfalls auch nur lokal vorhanden sein kann, wenigstens eines der beiden Fügepartner sorgt demnach für ein entsprechendes Komprimieren des Wabenkernteilrandes beim Zusammenfügen der Wabenkernteile, wodurch die Anzahl der Wabenstege im kritischen Übergangsbe reich von einem Wabenkernteil zum nächsten erhöht wird. Dies führt zu einer lokalen Verstärkung im Bereich der Stoßfuge.Independent of the exact arrangement and shape of the projections are advantageous at least one of the two edges to be joined, the projections at least locally slightly bigger than that corresponding recesses. When assembling such projections made with at least local excess, there is it in the area of the abutting edge to a material compression of the less rigid joining partner (at the same stiff joining partners the compression spreads to both joining partners) and a springback effect after the assembly process, causing in the area of the butt joint an additional one Gearing effect occurs and the butt joint safe with honeycomb webs filled is. An excess, if necessary can only be present locally, at least one of the two joining partner thus ensures for a corresponding compression of the honeycomb core edge when joining the Honeycomb core parts, whereby the number of honeycomb webs in the critical Übergangsbe rich from one honeycomb core part to the next elevated becomes. this leads to to a local reinforcement in the area of the butt joint.
Die Form der Vorsprünge und der damit korrespondierenden Ausnehmungen kann mannigfaltig sein, solange die beschriebene Verzahnung in der Ebene der miteinander zu verbindenden Wabenkernteile sichergestellt ist. Bei bevorzugten Ausgestaltungen sind die Vorsprünge zungenförmig. Kerben an der Verbindungsstelle der beiden zu verbindenden Wabenkernteilen sind zu vermeiden.The Shape of the protrusions and the corresponding recesses can be manifold, as long as the described gearing in the plane of each other is ensured to be connected honeycomb core parts. In preferred Embodiments are the projections tongue-shaped. Notches at the junction of the two honeycomb core parts to be joined should be avoided.
Das zuvor erwähnte Übermaß kann ebenfalls auf verschiedene Art und Weise erreicht werden. Beispielsweise kann eine Ausnehmung im Bereich ihres Grundes kreislinienförmig sein, während die Kontur des dieser Ausnehmung zugeordneten Vorsprungs in diesem Bereich ein definiertes Übermaß aufweist, d. h. der zugeordnete Vorsprung ist zumindest abschnittsweise etwas größer als die Ausnehmung. Sind die Vorsprünge zungenförmig, dann weisen die zungenförmigen Vorsprünge vorzugsweise im Bereich ihrer Zungenspitze ein solches Übermaß bezüglich der korrespondierenden Ausnehmung auf. Das Übermaß eines Vorsprungs bezüglich der ihm zugeordneten Ausnehmung kann jedoch auch durch eine Formabweichung des Vorsprungs bezüglich der korrespondierenden Ausnehmung erzeugt werden. So kann beispielsweise die Zungenspitze eines zungenförmigen Vorsprungs etwas oval ausgebildet und einer Ausnehmung zugeordnet sein, deren Öffnung in diesem Bereich durch einen Kreislinienabschnitt begrenzt ist. Selbstverständlich kann ein formgleiches Übermaß des Vorsprungs auch mit einer gewissen Formabweichung bezüglich der korrespondierenden Ausnehmung kombiniert sein, d. h. ein Vorsprung kann bezüglich der ihm zugeordneten Ausnehmung sowohl ein gewisses formgleiches Übermaß als auch eine gewisse Formabweichung aufweisen.The aforementioned oversize may also be achieved in different ways. For example, can a recess in the region of its bottom be circular, while the contour of the recess associated with this projection in this Area has a defined excess, d. H. the assigned projection is at least partially something greater than the recess. Are the projections tongue-shaped, then assign the tongue-shaped projections Such an excess in terms of the corresponding recess on. The excess of a projection concerning the However, it can also be associated with a recess by a shape deviation of the projection with respect to the corresponding recess can be generated. So, for example the tongue tip of a tongue-shaped Projection slightly oval and associated with a recess be whose opening in this area is limited by a circular section. Of course you can a conformal excess of the projection also with a certain shape deviation with respect to the corresponding one Recess combined, d. H. a projection can with respect to the him associated recess both a certain same shape oversize and have a certain shape deviation.
Die Festigkeit der Verbindungsstelle wird umso höher, je besser sich die beiden Wabenkernteile möglichst entlang ihrer gesamten Stoßfuge miteinander verzahnen und je weniger unausgefüllte Stellen die Stoßfuge hat. Vorzugsweise weisen deshalb einzelne oder alle Ausnehmungen an dem Rand, an dem einzelne oder alle Vorsprünge ein Übermaß aufweisen, ein Untermaß gegenüber dem korrespondierenden Vorsprung auf. Damit wird einerseits sichergestellt, dass die Stoßfuge überall gut ausgefüllt ist und die zu verbindenden Wabenkernteile sich entlang der gesamten Stoßfuge gut miteinander verzahnen, und andererseits ermöglicht eine solche Ausführung, dass beide zu verbindenden Ränder der Wabenkernteile mit dem gleichen Werkzeug oder, im Falle von CNC-gesteuerten Schneidwerkzeugen, mit den gleichen Programmen, geschnitten werden können.The The strength of the joint is higher, the better the two Honeycomb core parts as possible along its entire butt joint mesh with each other and the less unfilled places the butt joint has. Preferably, therefore, have individual or all recesses on the Edge at which some or all projections have an oversize, an undersize of the corresponding projection on. This ensures, on the one hand, that the butt joint is good everywhere filled out is and the honeycomb core parts to be joined along the entire butt joint dovetail well, and on the other hand, such an embodiment allows that both edges to be joined the honeycomb core parts with the same tool or, in the case of CNC-controlled cutting tools, with the same programs, can be cut.
Die eingangs genannte Aufgabe ist erfindungsgemäß auch gelöst durch ein Verfahren zur Herstellung eines Wabenkernes, der aus wenigstens zwei miteinander verbundenen Wabenkernteilen besteht, wobei das Verfahren die Schritte des Formens von Elementen an einem Rand eines ersten Wabenkernteiles und von Gegenelementen an einem dem Rand des ersten Wabenkernteiles zugewandten Rand eines zweiten Wabenkernteiles umfasst, derart, dass die Elemente und Gegenelemente unter Ausbildung einer Wabenkernverzahnung zusammenfügbar sind, und des Ineinanderfügens bzw. Ineinandersteckens der solchermaßen ausgebildeten Ränder der zwei Wabenkernteile zur Bildung des Wabenkernes. Die Elemente und Gegenelemente der wenigstens zwei Wabenkernteile können auf jede geeignete Art gebildet werden. Gemäß einer bevorzugten Ausführungsform des erfindungsgemäßen Verfahrens werden die Elemente und Gegenelemente durch Schneiden des jeweiligen Randes des Wabenkernteiles geformt, wobei das Schneiden vorzugsweise mittels Wasserstrahlschneiden erfolgt.The above object is also achieved by a method for producing a honeycomb core, which consists of at least two interconnected honeycomb core parts, wherein the method comprises the steps of forming elements on an edge of a first honeycomb core part and of counter-elements in a Edge of the first honeycomb core part facing edge of a second honeycomb core part comprises, such that the elements and counter-elements are joined together to form a honeycomb core toothing, and the Zusammeneinanderfügens or nesting of the thus formed edges of the two honeycomb core parts to form the honeycomb core. The elements and counter-elements of the at least two honeycomb core parts may be formed in any suitable manner. According to a preferred embodiment of the method according to the invention, the elements and counter-elements are formed by cutting the respective edge of the honeycomb core part, wherein the cutting preferably takes place by means of water jet cutting.
Die Form der Elemente und Gegenelemente kann nahezu beliebig gewählt werden, solange sichergestellt ist, dass die zwei oder mehr Wabenkernteile sich nach dem Zusammenfügen bzw. -stecken ihrer Ränder miteinander verzahnen. Vorzugsweise wird die Verzahnung mit Hinterschneidungen versehen, d. h. die Wabenkernverzahnung weist Hinterschneidungen auf, mittels derer sich die beiden Wabenkernteile ineinander verhaken, so dass ein Auseinanderziehen zweier miteinander verbundener Wabenkernteile in der Teileebene verhindert ist. Vorzugsweise sind die Elemente zungenförmige Vorsprünge und die Gegenelemente sind zungenförmige Ausnehmungen, die zu den zungenförmigen Vorsprüngen korrespondierend ausgebildet werden. Die Hinterschneidungen werden vorzugsweise im Bereich der Flanken der Elemente und Gegenelemente ausgeführt.The Form of elements and counter elements can be chosen almost arbitrarily, as long as it is ensured that the two or more honeycomb core parts after joining or sticking their edges dovetail with each other. Preferably, the teeth with undercuts provided, d. H. the honeycomb core teeth have undercuts on, by means of which the two honeycomb core parts interlock, so that a pulling apart of two interconnected honeycomb core parts is prevented in the part level. Preferably, the elements tongue-shaped projections and the counter-elements are tongue-shaped recesses that too the tongue-shaped projections be formed correspondingly. The undercuts will be preferably executed in the region of the flanks of the elements and counter-elements.
Bei besonders bevorzugten Ausführungsformen des erfindungsgemäßen Verfahrens wird beim Ineinanderfügen der Wabenkernteile wenigstens einer der Fügepartner zumindest lokal geringfügig verformt, beispielsweise durch Komprimieren bzw. Stauchen. Dadurch ist im Bereich der Stoßfuge zwischen zwei Wabenkernteilen eine gute Verzahnung der beiden Wabenkernteilränder und eine einwandfreie Ausfüllung der Stoßfuge sichergestellt, was den mechanischen Verbund an der Verbindungsstelle stärkt.at particularly preferred embodiments the method according to the invention is when merging at least locally slightly deforms the honeycomb core parts of at least one of the joining partners, for example, by compressing or upsetting. This is in the Area of the butt joint between two honeycomb core parts a good toothing of the two honeycomb core edges and a perfect filling the butt joint ensured what the mechanical bond at the joint strengthens.
Der erfindungsgemäße Wabenkern und das Verfahren zu seiner Herstellung ermöglichen es insbesondere bei großflächigen Sandwichbauteilen, das Wabenkernmaterial in gering belasteten Bereichen dieser Bauteile, z. B. Bereichen ohne Biegebeanspruchung, durch Verwendung eines leichteren Wabenkernmaterials bezüglich des Gesamtgewichts zu optimieren. Auf eine konventionelle Verbindung der Wabenkerne mittels relativ dicker Klebstofffugen und das dadurch verursachte Mehrgewicht kann ebenfalls verzichtet werden. Insgesamt lässt sich dadurch eine beträchtliche Gewichtseinsparung ohne eine Verringerung der Gebrauchstüchtigkeit des Sandwichbauteils erreichen.Of the honeycomb core according to the invention and the process for its preparation make it possible in particular in large-area sandwich components, the honeycomb core material in lightly loaded areas of these components, z. B. areas without bending stress, by using a lighter honeycomb core material in terms of total weight. On a conventional connection of the honeycomb cores by means of relative thicker adhesive joints and the resulting extra weight can also be waived. Overall, this can be a considerable Weight saving without a reduction in the efficiency reach the sandwich component.
Ein bevorzugtes Ausführungsbeispiel der Erfindung wird im Folgenden anhand schematischer Figuren näher erläutert, in denen:One preferred embodiment the invention is explained in more detail below with reference to schematic figures, in which:
In
Die
beiden Wabenkernteile
Zur
Verbesserung der Festigkeit der Verbindungsstelle zwischen den beiden
Wabenkernteilen
Damit
die beiden Wabenkernteile
Wie
aus
Zwar
haben im gezeigten und beschriebenen Ausführungsbeispiel die Vorsprünge eine
zungenförmige
Gestalt, es sind jedoch vielerlei andere Formen von Vorsprüngen und
zugehöriger
Ausnehmungen denkbar, mit denen das Ziel einer Wabenkernverzahnung
und insbesondere einer hinterschnittenen Formschlussverbindung zwischen
zwei Wabenkernteilen
Claims (21)
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DE102007026296A DE102007026296A1 (en) | 2007-06-06 | 2007-06-06 | Honeycomb core, in particular for a sandwich component, of at least two interconnected honeycomb core parts and method for its production |
PCT/EP2008/004444 WO2008148537A1 (en) | 2007-06-06 | 2008-06-04 | Honeycomb core, particular for a sandwich-type component, consisting of at least two honeycomb-core parts connected to one another and method of manufacturing said honeycomb core |
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WO2012019739A1 (en) | 2010-08-12 | 2012-02-16 | Airbus Operations Gmbh | Aircraft interior lining component and method for producing an aircraft interior lining component |
DE102014215661A1 (en) | 2014-08-07 | 2016-02-11 | Airbus Operations Gmbh | Aircraft interior trim component, method for manufacturing an aircraft interior trim component and aircraft assembly |
DE102016222435A1 (en) | 2016-11-15 | 2018-05-17 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Sandwich element, load-bearing structure and vehicle |
DE202018101146U1 (en) * | 2018-03-01 | 2019-06-04 | Reinz-Dichtungs-Gmbh | tempering |
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CA2866720A1 (en) * | 2014-01-21 | 2015-07-21 | The Boeing Company | Sandwich-structural composite apparatus with core joining and splicing method for retention of structural and acoustic capability |
FR3019774A1 (en) * | 2014-04-14 | 2015-10-16 | Astrium Sas | POLYGONAL PIECE WITH ALVEOLES FOR A PANEL WAVE, PARTICULARLY A SATELLITE ANTENNA REFLECTOR |
JP6615135B2 (en) * | 2017-01-30 | 2019-12-04 | 昭和飛行機工業株式会社 | How to connect honeycomb cores |
US10994856B2 (en) * | 2017-10-16 | 2021-05-04 | Rohr, Inc. | Structural panel with splice joint between adjacent core structures |
CN108870058A (en) * | 2018-08-29 | 2018-11-23 | 徐卫国 | A kind of honeycomb core and its processing method for eliminating compression peaks using fluting method |
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DE202006008907U1 (en) * | 2006-06-02 | 2006-08-10 | Zitzer, Vladimir | Modular construction system for the assembly of e.g. furniture or toys employs rounded dovetail joints |
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DE202006008907U1 (en) * | 2006-06-02 | 2006-08-10 | Zitzer, Vladimir | Modular construction system for the assembly of e.g. furniture or toys employs rounded dovetail joints |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2012019739A1 (en) | 2010-08-12 | 2012-02-16 | Airbus Operations Gmbh | Aircraft interior lining component and method for producing an aircraft interior lining component |
DE102010034084A1 (en) | 2010-08-12 | 2012-02-16 | Airbus Operations Gmbh | Aircraft interior trim component and method for producing an aircraft interior trim component |
DE102014215661A1 (en) | 2014-08-07 | 2016-02-11 | Airbus Operations Gmbh | Aircraft interior trim component, method for manufacturing an aircraft interior trim component and aircraft assembly |
US10710697B2 (en) | 2014-08-07 | 2020-07-14 | Airbus Operations Gmbh | Aircraft interior lining component, method for producing an aircraft interior lining component, and aircraft assembly |
DE102016222435A1 (en) | 2016-11-15 | 2018-05-17 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Sandwich element, load-bearing structure and vehicle |
DE102016222435B4 (en) | 2016-11-15 | 2018-09-06 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Sandwich element, load-bearing structure and vehicle |
DE202018101146U1 (en) * | 2018-03-01 | 2019-06-04 | Reinz-Dichtungs-Gmbh | tempering |
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