DE102004055592B4 - Verfahren zum Verbinden mindestens zweier Bauteile aus einem thermoplastischen Faserverbundwerkstoff - Google Patents

Verfahren zum Verbinden mindestens zweier Bauteile aus einem thermoplastischen Faserverbundwerkstoff Download PDF

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DE102004055592B4
DE102004055592B4 DE102004055592.3A DE102004055592A DE102004055592B4 DE 102004055592 B4 DE102004055592 B4 DE 102004055592B4 DE 102004055592 A DE102004055592 A DE 102004055592A DE 102004055592 B4 DE102004055592 B4 DE 102004055592B4
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components
fiber composite
composite material
sewing
thermoplastic fiber
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DE102004055592A1 (de
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Theodor Stoemer
Jochen Holzleitner
Stefan Bauer
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Bayerische Motoren Werke AG
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Bayerische Motoren Werke AG
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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
    • B29C65/62—Stitching
    • 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
    • B29C65/72—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by combined operations or combined techniques, e.g. welding and stitching
    • 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
    • B29C66/024—Thermal pre-treatments
    • B29C66/0242—Heating, or preheating, e.g. drying
    • 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
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • 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
    • 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
    • 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
    • B29C66/7214—Fibre-reinforced materials characterised by the length of the fibres
    • B29C66/72141—Fibres of continuous length
    • 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
    • B29C66/739—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 material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—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 material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—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 material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • B29C66/83413—Roller, cylinder or drum types cooperating rollers, cylinders or drums
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B23/00—Sewing apparatus or machines not otherwise provided for
    • 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
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1403—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the type of electromagnetic or particle radiation
    • B29C65/1412—Infrared [IR] radiation
    • 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
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1403—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the type of electromagnetic or particle radiation
    • B29C65/1425—Microwave radiation
    • 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
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • 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
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
    • B29C65/3608—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint comprising single particles, e.g. fillers or discontinuous fibre-reinforcements
    • B29C65/3616—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint comprising single particles, e.g. fillers or discontinuous fibre-reinforcements comprising discontinuous fibre-reinforcements
    • 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
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3672—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint
    • B29C65/3676—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic
    • 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
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3672—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint
    • B29C65/3684—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being non-metallic
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2101/00—Use of unspecified macromolecular compounds as moulding material
    • B29K2101/12—Thermoplastic materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2307/00—Use of elements other than metals as reinforcement

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

Verfahren zum Verbinden mindestens zweier Bauteile aus einem thermoplastischen Faserverbundwerkstoff, dadurch gekennzeichnet, dass die zu verbindenden Bauteile miteinander vernäht werden.

Description

  • Die Erfindung bezieht sich auf ein Verfahren der im Oberbegriff des ersten Anspruchs genannten Art.
  • Aus der nicht vorveröffentlichten deutschen Patentanmeldung DE 10 2004 013 546 A1 ist es bekannt, zwei Dünnbleche mittels Nähen zu verbinden. Auch ist es daraus bekannt, Sandwichbleche zu vernähen. Als Faden wird ein Edelstahlfaden vorgeschlagen.
  • Dieses Verfahren eignet sich zum Verbinden von Dünnblechen oder Sandwichblechen. Es lässt sich jedoch zum Verbinden von Bauteilen aus thermoplastischen Faserverbundwerkstoffen nicht anwenden.
  • Aufgabe der vorliegenden Erfindung ist es, ein Verfahren zum Verbinden zweier Enden eines oder mehrerer Bauteile aus einem thermoplastischen Faserverbundwerkstoffes aufzuzeigen, bei dem in der Verbindungsstelle eine hohe Festigkeit erzielt wird.
  • Diese Aufgabe wird erfindungsgemäß durch die Merkmale des ersten Anspruchs gelöst. Durch das Vernähen wird eine wesentlich höhere Festigkeit als das bisher übliche Verbindungsverfahren, Kleben oder Schweißen,erzielt, da bei beiden Verfahren nur der thermoplastische Anteil und nicht wie beim Nähen auch das Fasergelege oder Gewebe miteinander verbunden werden. Damit erhält man wesentlich bessere mechanische Eigenschaften in der Fügenaht.
  • Das erfindungsgemäße Verfahren lässt sich auch vorteilhafterweise dann anwenden, wenn die zu verbindenden Enden vorher geklebt oder verschweißt wurden. Dadurch wird eine nochmalige Erhöhung der mechanischen Kennwerte erzielt, weil auch die Fasern in der Fügestelle miteinander verbunden werden.
  • Die Unteransprüche stellen vorteilhafte Ausgestaltungen der Erfindung dar.
  • Durch das Erwärmen gemäß Anspruch 2 wird das Nähen wesentlich erleichtert. Zudem wird verhindert, dass der verwendete Faden durch Ausbrechungen des thermoplastischen Materials an der Nahtstelle beschädigt wird.
  • Neben den in Anspruch 3 genannten Heizverfahren können auch noch andere geeignete Heizverfahren zur Anwendung gelangen, d.h. das Verfahren wird sinnvollerweise auf die Eigenschaften des thermoplastischen Faserverbundwerkstoffes abgestimmt.
  • Da sich thermoplastische Faserverbundwerkstoffe bei Erwärmen ausdehnen, ist es sinnvoll, diese Ausdehnung beim Abkühlen durch Formpressen wieder rückgängig zu machen.
  • Im Folgenden wird die Erfindung anhand eines bevorzugten Ausführungsbeispiel näher erläutert. In der einzigen Abbildung ist schematisiert der erfindungsgemäße Nähvorgang dargestellt.
  • In der einzigen Figur werden die Enden 1 und 2 zweier Bauteile 3 und 4 aus thermoplastischen Faserverbundwerkstoff mittels Überlappnaht miteinander verbunden.
  • Hierzu dient die Nähmaschine 5, die mit Hilfe eines Fadens 6, der entsprechend dem Material des Faserverbundwerkstoffs ausgewählt wurde.
  • Um das Vernähen erleichtern, werden vor dem Vernähen die beiden zu verbindenden Enden 1 und 2 mittels einer Heizstation 7 erwärmt.
  • Je nach Art des Faserverbundwerkstoffes kann als Heizung eine Strahlungsheizung, eine Kontaktheizung, und bei Carbonfasern mit Metalleinlegem auch eine Induktionsheizung oder Mikrowelle vorgesehen werden.
  • Über nicht dargestellte Vorschubeinrichtungen werden die zu vernähenden Bauteile durch die Heizstation 7 und zur Nähmaschine 5 geführt. Aufgrund des erweichten Thermoplasten kann die Nähnadel sehr einfach die zu verbindenden Bauteilenden vollständig durchdringen und so auch die eingebetteten Gewebe wie bei einem üblichen Nähverfahren vernähen.
  • Nach dem Nähprozess erstarren die erwärmten Bereiche der zu verbindenden Enden wieder, wobei über nicht dargestellte weitere Anpressrollen dafür Sorge getragen wird, dass die ursprüngliche, d.h. die Bauteilstärke vor dem Erwärmen, wieder erreicht wird.
  • Dieser Prozess kann problemlos vollautomatisch durchgeführt werden.
  • Unter Bauteile im Sinne der Erfindung werden auch Halbzeuge und fertige Bauteilen, bei denen das Verbinden der letzte Fertigungsschritt ist, verstanden.
  • Durch das erfindungsgemäße Vernähen erreicht man ein Bauteil oder ein Halbzeug ohne optische Änderung in der Fügenaht mit wesentlich verbesserten mechanischen Eigenschaften in der Fügenaht als sie durch Kleben oder Verschweißen der zu verbindenden Enden zu erzielen ist.
  • Darüber hinaus ist es möglich, das erfindungsgemäße Nähverfahren auch zusätzlich zum Kleben oder Schweißen der zu verbindenden Enden anzuwenden, um deren Festigkeit weiter zu erhöhen.
  • Selbstverständlich kann das beschriebene Verfahren auch dann angewandt werden, wenn zwei Bauteile nicht an ihren Enden miteinander zu verbinden sind, sondern in anderen Bereichen eine Verbindung erforderlich ist.

Claims (5)

  1. Verfahren zum Verbinden mindestens zweier Bauteile aus einem thermoplastischen Faserverbundwerkstoff, dadurch gekennzeichnet, dass die zu verbindenden Bauteile miteinander vernäht werden.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die zu verbindenden Bauteile vor dem Vernähen erwärmt werden.
  3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass die zu verbindenden Bauteile zumindest in ihrem zu verbindenden Bereich mittels Induktion oder Infrarotstrahlern erwärmt werden.
  4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, dass die erwärmten Bereiche in ihre ursprüngliche Bauteilstärke gepresst werden.
  5. Verfahren nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass als Nähfaden ein Faden aus Glasfasern und/oder Carbonfasern verwendet wird.
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DE102012110122A1 (de) * 2012-10-24 2014-04-24 Rehau Ag + Co Verfahren zum Herstellen einer Anordnung aus miteinander verbundenen Materialstücken aus einem flächig ausgebildeten, unidirektional-faserverstärkten Material und System zum Verbinden der Materialstücke einer derartigen Anordnung
WO2019129781A1 (fr) 2017-12-30 2019-07-04 Latecoere Assemblage de pieces en materiau thermoplastique et procede d'assemblage de telles pieces par rivetage thermoplastique
FR3076248A1 (fr) * 2017-12-30 2019-07-05 Latecoere Assemblage de pieces en materiau thermoplastique et procede d'assemblage de telles pieces par rivetage thermoplastique
FR3092269A1 (fr) * 2019-02-04 2020-08-07 Airbus Operations Procédé de fabrication à partir de préformes d’éléments de liaison d’une aile d’aéronef à un caisson central de voilure

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GB1115170A (en) * 1966-10-14 1968-05-29 Luther George Simjian Method for reinforcing sewn material
AT275291B (de) * 1963-03-15 1969-10-27 Rhodiaceta Vorrichtung an Nähmaschinen zum Nähen von flachen Gebilden, insbesondere von Geweben oder Folien aus thermoplastischem Material
US4503788A (en) * 1982-09-24 1985-03-12 Grumman Aerospace Corporation Translaminar stitching apparatus for composite airframe part assembly
WO1999050492A1 (de) * 1998-03-28 1999-10-07 Moll Klaus Uwe Verfahren und vorrichtung zur herstellung von nähnähten
DE19932842A1 (de) * 1999-07-14 1999-12-30 Inst Verbundwerkstoffe Gmbh Kohlenstoffasernähgarn für Faser-Kunststoff-Verbund-Bauteile
DE10255227A1 (de) * 2002-11-26 2004-06-03 Freundes- und Förderkreis des Institutes für Textiltechnik der RWTH Aachen e.V. Vorrichtung zum Transport (Zu- und Abtransport) und zur dreidimensionalen Formung des Nähgutes für die Konfektionierung von Verstärkungs- und anderen Textilien
DE102004013546A1 (de) * 2004-03-19 2005-10-06 Bayerische Motoren Werke Ag Verfahren zum Verbinden mindestens zweier Dünnbleche

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT275291B (de) * 1963-03-15 1969-10-27 Rhodiaceta Vorrichtung an Nähmaschinen zum Nähen von flachen Gebilden, insbesondere von Geweben oder Folien aus thermoplastischem Material
GB1115170A (en) * 1966-10-14 1968-05-29 Luther George Simjian Method for reinforcing sewn material
US4503788A (en) * 1982-09-24 1985-03-12 Grumman Aerospace Corporation Translaminar stitching apparatus for composite airframe part assembly
WO1999050492A1 (de) * 1998-03-28 1999-10-07 Moll Klaus Uwe Verfahren und vorrichtung zur herstellung von nähnähten
DE19932842A1 (de) * 1999-07-14 1999-12-30 Inst Verbundwerkstoffe Gmbh Kohlenstoffasernähgarn für Faser-Kunststoff-Verbund-Bauteile
DE10255227A1 (de) * 2002-11-26 2004-06-03 Freundes- und Förderkreis des Institutes für Textiltechnik der RWTH Aachen e.V. Vorrichtung zum Transport (Zu- und Abtransport) und zur dreidimensionalen Formung des Nähgutes für die Konfektionierung von Verstärkungs- und anderen Textilien
DE102004013546A1 (de) * 2004-03-19 2005-10-06 Bayerische Motoren Werke Ag Verfahren zum Verbinden mindestens zweier Dünnbleche

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