WO2022167159A1 - Procédé de production d'un élément composite renforcé par des fibres - Google Patents

Procédé de production d'un élément composite renforcé par des fibres Download PDF

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Publication number
WO2022167159A1
WO2022167159A1 PCT/EP2022/050015 EP2022050015W WO2022167159A1 WO 2022167159 A1 WO2022167159 A1 WO 2022167159A1 EP 2022050015 W EP2022050015 W EP 2022050015W WO 2022167159 A1 WO2022167159 A1 WO 2022167159A1
Authority
WO
WIPO (PCT)
Prior art keywords
positioning element
metal part
fiber material
tool
composite component
Prior art date
Application number
PCT/EP2022/050015
Other languages
German (de)
English (en)
Inventor
Michael Karl
Original Assignee
Siemens Mobility GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Mobility GmbH filed Critical Siemens Mobility GmbH
Priority to EP22700281.3A priority Critical patent/EP4255724A1/fr
Publication of WO2022167159A1 publication Critical patent/WO2022167159A1/fr

Links

Classifications

    • 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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/681—Component parts, details or accessories; Auxiliary operations
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/12—Moulds or cores; Details thereof or accessories therefor with incorporated means for positioning inserts, e.g. labels
    • B29C33/14—Moulds or cores; Details thereof or accessories therefor with incorporated means for positioning inserts, e.g. labels against the mould wall
    • 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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/86—Incorporated in coherent impregnated reinforcing layers, e.g. by winding

Definitions

  • the invention relates to a method for producing a fiber composite component with a bolt-like metal part inserted therein to form a connection point of the fiber composite component.
  • Fiber composite components are manufactured in closed (e.g. RTM processes) or open (e.g. hand laminate processes) tools. They serve, for example, as cladding elements for vehicles, in particular rail vehicles, and can be present as side skirt elements to be attached to a vehicle shell. Such fiber composite components are to be attached to the vehicle body shell and require connection points for this purpose.
  • metal parts are incorporated into a laminate of the fiber composite components. The difficulty arises that the metal parts used to form connection points can easily slip in the tools or be unintentionally wetted with resin. Position control of the metal parts to be introduced into the laminate is not possible, particularly in closed tools for the production of fiber composite components. If, after loading the fiber composite, it turns out that the metal part has slipped, the fiber composite component that has just been produced is typically scrap.
  • the invention is based on the object of developing a method of the type mentioned at the outset in such a way that that a more reliable positioning of the metal parts in the laminate can be achieved.
  • the method comprises the following steps: a) Inserting the metal part into a fiber material in such a way that a head section of the metal part is arranged on one side of the fiber material and a connection section of the metal part protrudes from the other side of the fiber material, b) applying a cone-shaped positioning element to the connection section of the metal part in such a way that the connection section is received in a bore of the positioning element, a base surface of the positioning element rests on the fiber material and the fiber material between the positioning element and is clamped in the head section of the metal part, c) introducing an arrangement of the metal part, the fiber material and the positioning element into a tool, with a dimensionally stable tool shell of the tool being adapted in shape to a lateral surface of the positioning element ste recess for receiving the positioning element, d) converting the fiber material into a laminate, e) removing the arrangement of the metal part, the fiber material and the positioning element from the
  • the intended shaping of the conical positioning element on the one hand and the recess in the tool interacting with the positioning element on the other hand ensures reliable positioning of the bolt-like metal part during the manufacturing process for the fiber composite component.
  • the cone-shaped positioning element reliably seals the connection section of the metal part.
  • This connection section can be equipped with an external thread in order to create screw connections between the finished fiber composite component and a vehicle body shell.
  • the cone-shaped positioning element forms a flat surface in its contact area with the fiber material/laminate, which can be used, for example, as a screwing surface without mechanical processing, for example milling, being necessary.
  • the cone-shaped positioning element is preferably made of a material selected from the group consisting of Teflon, PET (polyethylene terephthalate) and silicone.
  • the material used for the cone-shaped positioning element should have good separating properties in relation to synthetic resins, in particular duroplastics.
  • step d) the transformation of the fiber material into a laminate, e.g. B. Applying a resin-hardener mixture to the fiber material and allowing the resin to harden, preferably in an RTM (Resin Transfer Molding) process or hand laminate process.
  • the RTM process is also often referred to as transfer molding a tool is inserted and then a liquid resin-hardener mixture is poured around it under pressure.
  • the resin/hardener mixture can be applied to the fiber material in particular by generating a negative pressure in a cavity of the tool.
  • the tool can consist of two half-shells or one be constructed shell and a film.
  • the fiber material pre-impregnated with resin/hardener and thus present as a so-called "prepreg”.
  • prepreg resin/hardener
  • the fiber material can in particular be in the form of a fabric (woven) or a non-crimp fabric (sewn). In particular, several fiber mats can also be arranged one above the other.
  • the positioning element is preferably designed in the shape of a cone or a truncated cone. It is essential that a lateral surface of the positioning element does not have any undercuts compared to the adjacent tool surface, so that it can be detached from the tool again after the fiber composite component has been completed.
  • FIG. 1 shows a schematic cross-sectional view of a fiber composite component placed in a cavity of a tool in a first embodiment
  • FIG. 2 shows a schematic cross-sectional view of a fiber composite component placed in a cavity of a tool in a second embodiment
  • FIG. 3 shows a perspective view of a tool for producing the fiber composite component from FIG. 2 and
  • FIG. 4 shows a perspective view of a connection arrangement of the fiber composite component from FIG. 2 placed in the tool from FIG.
  • FIG. 1 shows a fiber composite component 1, which comprises a flat fiber material 2 and a metal part 3 designed as a threaded bolt.
  • the metal part 3 is inserted into the fiber material 2, with a head portion 4 on one side of the flat fiber material 2 and a connection section 5 of the metal part 3 is arranged on the other side of the fiber material 2 .
  • a conical positioning element 6 is pushed or screwed onto the connection section 5 of the metal part 3, so that a base surface of the positioning element 6 rests on the fiber material 2 and the fiber material 2 is clamped between the positioning element 6 and the head section 4 of the metal part 3.
  • the metal part 3 is stepped in its axial direction, so that a positioning section 7 of the metal part 3 adjoins the head section 4 in the direction of the connection section 5, which in the radial direction of the metal part 3 bears directly against the fiber material 2 at an annular boundary surface 8. while the head portion 4 of the metal part 3, which, based on the positioning portion 7, the connection portion 5 is opposite, compared to the positioning portion 7 has an enlarged radius. In this way, the fiber material 2 can be clamped between the head section 4 and the cone-shaped positioning element 6 . This results in a flat surface 9, which can be used, for example, for a screw connection. In particular, the formation of the metal part 3 as a threaded bolt can be used due to the presence of the flat surface 9 .
  • the arrangement of the fiber material 2, the metal part 3 and the truncated cone-shaped positioning element 6 is accommodated in a cavity of a tool, with a dimensionally stable tool shell 10 of the tool having a depression 12 whose outer shape is adapted to the shape of the lateral surface of the truncated cone-shaped positioning element 6 .
  • the lower tool shell 10 shown in FIG. 1 is made of dimensionally stable material.
  • the cavity is delimited on the other side of the fiber composite component 1 by a vacuum foil 11, so that the cavity is designed to be pressure-tight.
  • the arrangement as shown in FIG. 1 is subject to the following process steps for the production of the fiber composite Component 1: in a first step, the metal part 3 is inserted into the fiber material 2 in such a way that the head section 4 of the metal part 3 is arranged on one side of the fiber material 2 and the connection section 5, which has an external thread in the illustrated embodiment, of the other side of the fiber material 2 protrudes.
  • the fiber material 2 can be present either in the dry state or as a prepreg already pre-impregnated with resin.
  • the cone-shaped positioning element 6 is applied to the connection section 5 of the metal part 3 in such a way that the connection section 5 is received in a bore 13 of the positioning element 6, whereby it is used to clamp the fiber material 2 between the head section 4 of the metal part 3 and the Base of the truncated cone-shaped positioning element 6 comes.
  • the entire arrangement of metal part 3, fiber material 2 and positioning element 6 is then inserted into the depression 12 of the lower tool shell 10 and the cavity is completed with the aid of the vacuum film 11.
  • the fiber material 2 is not already present as a prepreg, in the following process step the fiber material 2 is treated with resin/hardener in the course of carrying out an RTM process, after which the resin is allowed to harden, if necessary with the application of heat and pressure. In the process, the fiber material 2 is transformed into a laminate. After these process steps have been carried out, the arrangement shown in FIG. 1 is obtained.
  • connection section 5 of the metal part 3 is freely accessible for any fastening processes.
  • FIG. 2 shows a fiber composite component 1 in a second embodiment. This differs from that according to FIG. 1 only in that a metal strip 13 is provided which is integrally connected to the metal part 3.
  • the metal strip 13 is arranged between the head section 4 and the positioning section 7 and serves solely to connect several metal parts 3 of the same type to one another, see FIG. Fig. 4. If the metal part 3 is provided individually, the metal strip 13 can be omitted, see Fig. 1.
  • FIG. 3 shows the tool shell 10 in an embodiment with three indentations 12 arranged in a straight row.
  • FIG. 4 shows a connection arrangement for the fiber composite component 1 in its design according to FIG. 2. Three metal parts 3 arranged in a straight row are provided , which together form the connection arrangement and are connected to one another by means of the metal strip 13 .
  • the fiber material 2 is not shown in FIG.
  • the truncated cone-shaped positioning element 6 is made of silicone, since this material has good release properties with respect to synthetic resins.
  • the fiber material 2 can be in the form of a non-crimp fabric or a woven fabric.
  • an angle between a cone base of the truncated cone-shaped positioning element 6 and its cone surface is about 45 °. This makes it easier to remove the truncated cone-shaped positioning element 6 from the lower tool shell 10. It should be noted that said angle should be at most 88° in order to enable the positioning element 6 to be removed from the lower tool shell 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne un procédé de production d'un élément composite renforcé par des fibres (1) avec une pièce métallique du type boulon (1) introduite en son sein pour former un point d'ancrage pour l'élément composite renforcé par des fibres (1), caractérisé par les étapes suivantes : a) l'insertion de la pièce métallique (3) dans un matériau fibreux (2) de sorte qu'une partie de tête (4) de la pièce métallique (3) est agencée sur un côté du matériau fibreux (2) et une partie d'ancrage (5) de la pièce métallique (3) fait saillie à partir de l'autre côté du matériau fibreux (2), b) l'ajustement d'un élément de positionnement conique (6) sur la partie d'ancrage (5) de la pièce métallique (3) de sorte que la partie d'ancrage (5) est logée dans un alésage (3) de l'élément de positionnement (6), une face inférieure de l'élément de positionnement (6) repose contre le matériau fibreux (2), et le matériau fibreux (2) est serré entre l'élément de positionnement (6) et la partie de tête (4) de la pièce métallique (3), c) la mise en place d'un agencement constitué de la pièce métallique (3), du matériau fibreux (2) et de l'élément de positionnement (6) dans un outil, une enveloppe d'outil dimensionnellement stable (10) de l'outil présentant, afin de recevoir l'élément de positionnement (6), un creux (12) dont la forme correspond à une surface latérale de l'élément de positionnement (6), d) la transformation du matériau fibreux (2) en un stratifié, e) le retrait de l'agencement constitué de la pièce métallique (3), du matériau fibreux (2) et de l'élément de positionnement (6) de l'outil (10, 11) et f) le retrait de l'élément de positionnement conique (6) de la partie d'ancrage (5) de la pièce métallique (3).
PCT/EP2022/050015 2021-02-03 2022-01-03 Procédé de production d'un élément composite renforcé par des fibres WO2022167159A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22700281.3A EP4255724A1 (fr) 2021-02-03 2022-01-03 Procédé de production d'un élément composite renforcé par des fibres

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021200952 2021-02-03
DE102021200952.2 2021-02-03

Publications (1)

Publication Number Publication Date
WO2022167159A1 true WO2022167159A1 (fr) 2022-08-11

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EP (1) EP4255724A1 (fr)
WO (1) WO2022167159A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012001660A2 (fr) * 2010-07-02 2012-01-05 Automobili Lamborghini S.P.A. Procédé, moule, dispositifs et kit pour fabriquer des produits faits de matériaux composites, ainsi que produits fabriqués à l'aide de ce procédé et/ou à l'aide de ces moyens
WO2015039828A1 (fr) * 2013-09-18 2015-03-26 Bayerische Motoren Werke Aktiengesellschaft Ensemble structural et procédé pour produire un élément en matière plastique et élément en matière plastique
DE102016216958A1 (de) * 2016-09-07 2018-03-08 Audi Ag Faserverstärktes Kunststoffbauteil mit einem Lasteinleitungselement und dessen Herstellungsverfahren sowie ein Lasteinleitungselement zur Durchführung des erfindungsgemäßen Herstellungsverfahrens
DE102017102566A1 (de) * 2017-02-09 2018-08-09 CG Rail - Chinesisch-Deutsches Forschungs- und Entwicklungszentrum für Bahn- und Verkehrstechnik Dresden GmbH Verfahren zur Verbindung eines Verbindungsstückes mit einem U-förmigen Ringanker für ein Kopfmodul für Schienenfahrzeuge

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012001660A2 (fr) * 2010-07-02 2012-01-05 Automobili Lamborghini S.P.A. Procédé, moule, dispositifs et kit pour fabriquer des produits faits de matériaux composites, ainsi que produits fabriqués à l'aide de ce procédé et/ou à l'aide de ces moyens
WO2015039828A1 (fr) * 2013-09-18 2015-03-26 Bayerische Motoren Werke Aktiengesellschaft Ensemble structural et procédé pour produire un élément en matière plastique et élément en matière plastique
DE102016216958A1 (de) * 2016-09-07 2018-03-08 Audi Ag Faserverstärktes Kunststoffbauteil mit einem Lasteinleitungselement und dessen Herstellungsverfahren sowie ein Lasteinleitungselement zur Durchführung des erfindungsgemäßen Herstellungsverfahrens
DE102017102566A1 (de) * 2017-02-09 2018-08-09 CG Rail - Chinesisch-Deutsches Forschungs- und Entwicklungszentrum für Bahn- und Verkehrstechnik Dresden GmbH Verfahren zur Verbindung eines Verbindungsstückes mit einem U-förmigen Ringanker für ein Kopfmodul für Schienenfahrzeuge

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Publication number Publication date
EP4255724A1 (fr) 2023-10-11

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