DE102013209634A1 - Fastening element and fiber composite component with fastening element - Google Patents

Abstract

The invention relates to a fastening element (1) comprising a first region (2), a second region (4) and a hot forming region (3) arranged between the first region (2) and the second region (4), wherein at the first region (2) a contact surface (5) for arrangement on a fiber composite component (7) is provided, and wherein the hot forming region (3) comprises a thermoplastic material.

Description

The present invention relates to a fastening element and a fiber composite component with a fastening means and its use, and also to a method for producing a fiber composite component with a fastening element.

Fiber composite components are characterized by excellent mechanical properties and also, compared to conventional metallic materials, by a very low weight. As a result, fiber composite components are used for various applications in lightweight construction, especially in the automotive industry, where a weight saving of the components with very good strength and rigidity in the focus. Increased use of fiber composites and fiber composite components formed therefrom as lightweight materials, connecting elements are required, which are both a fixture on the fiber composite component itself as well as allow attachment of a fiber composite component to other components. Due to the structural conditions of a fiber composite component, however, it is only partially possible to screw this by means of conventional Verschraubungselemente. On the other hand attaching fasteners by a difficult clamping of the fiber composite material, and thus a deterioration of the settlement behavior of the fiber composite component, and also due to the requirement of contact corrosion, difficult. Other ways of attaching fasteners, such as gluing, riveting or nailing, fail because of poor permanent anchoring of the fastener in the fiber composite component.

Based on this prior art, it is therefore an object of the present invention to provide a fastener that can be easily and stably arranged on a fiber composite component without adversely affecting this and on the other component permanently with the fiber composite component can be fastened. It is another object of the invention to provide a fiber composite component with a fastener, wherein the fastener is connected in a simple manner stable and durable with the fiber composite component and allows a stable and permanent attachment of other components to the fiber composite component, and to provide a method for its production, the simply without great technical effort and thus cost feasible.

According to the invention, the object is achieved by a fastening element which comprises a first region, a second region and a hot forming region which is arranged between the first region and the second region, wherein a contact surface for arrangement on a fiber composite component is provided on the first region, and the hot forming area, and preferably also the other constituents of the fastening element, comprise a thermoplastic material. The fastening element can be easily connected to a fiber composite component, for example over the first region, by being arranged in a recess provided in the fiber composite component. The contact surface is further configured to abut on one side of the fiber composite component, and thus to form a partial fixation of the fastening element in or on the fiber composite component and thus contribute to the attachment of the fastener in or on a fiber composite component. By providing a hot forming area which comprises a thermoplastic material, at least one shoulder can be formed in this area by hot forming, which is provided for forming a form-fitting, and preferably also a cohesive, connection with the fiber composite component. In addition, contact corrosion is avoided due to the use of a thermoplastic material. Such a structured fastener can permanently stable connected to a fiber composite component, without the fiber composite component undergoes deformation, is clamped, its mechanical properties or settlement behavior are impaired. Furthermore, a further component or a plurality of components can be connected to the fiber composite component stably and permanently, preferably also detachably, via the fastening element.

The dependent claims contain advantageous developments and refinements of the invention.

According to an advantageous development, the first region of the fastening element is not cylindrical. As a result, slipping out, slipping and, in particular, twisting of the fastening element arranged in a fiber composite component can be effectively prevented, even if torsional forces act.

Further advantageously, the fastening element on the second region comprises a device or structure for fastening a further component or further components, preferably a threaded bolt, a C-clip, a snap hook, a ball / socket system or the like. Thus, the fastener can serve as a link between a fiber composite component and one or more other components and provide a durable and stable, and preferably also releasable, connection of these components.

Also according to the invention, a fiber composite component is described with a fastener, which achieves the above object by solves that the fastening element comprises a first region, a second region and at least one arranged between the first region and the second region shoulder which forms a positive, preferably also a material-locking connection with the fiber composite component, wherein the shoulder comprises a thermoplastic material and wherein the first region of the fastener is at least partially disposed in a recess in the fiber composite component.

The thermoplastic material is not limited in detail and may comprise a thermoplastic material or mixtures of several such materials and / or any conventional additives. Furthermore, the remaining components of the fastener may be formed from such a thermoplastic material. The use of a thermoplastic material ensures good compatibility with common materials of fiber composite components, whereby a permanently stable connection between the fastener and the fiber composite component can be formed.

The arrangement of the first region of the fastening element in the recess in the fiber composite component, as well as through the shoulder, which enters into a positive, and preferably also cohesive, connection with the fiber composite component can, without great technical effort and thus cost, a stable and mechanically strong connection between the fastener and the fiber composite component are manufactured, which prevents a clamping of the fiber composite component or otherwise adversely affecting the structure or properties of the fiber composite component. In addition, at least one further component can be connected to the fiber composite component stably and permanently and preferably also detachably via the fastening element.

The developments, advantages and effects according to the invention described for the fastening element according to the invention also find application to the fiber composite component according to the invention.

According to an advantageous development, the fiber composite component according to the invention is characterized in that the shoulder is formed by hot forming and in particular by hot-setting of the thermoplastic material. By hot forming and in particular by hot stamping, the fastener can be easily deformed by applying only small forming forces and form a pronounced shoulder, which ensures a permanently stable anchoring in or on the fiber composite component. The hot forming further requires only a small change in strength and elongation at break of the formed material and guarantees high dimensional tolerances and a good surface quality, so that a very good material bond between fastener and fiber composite component is obtained.

According to a further advantageous development, the first region of the fastening element arranged in the recess in the fiber composite component is not cylindrical, which prevents twisting of the fastening element when torsional forces act.

Further advantageously, a contact surface is arranged on the first region of the fastening element, which bears against the fiber composite component. As a result, slipping or slipping out of the fastening element from or into the fiber composite component is prevented in a particularly effective manner.

Further advantageously, the second region of the fastening element comprises a device or structure for fastening at least one further component, wherein the device or structure preferably comprises a threaded bolt, a C-clip, a snap hook, a ball / socket system or the like. These fastening devices can be used universally for the permanent and stable, but also releasable, attachment of at least one further component to the fiber composite component according to the invention. The corresponding fastener is selected depending on the function and geometric arrangement of the components to be joined.

Due to the extremely good mechanical properties, and in particular the stiffness and strength of carbon fiber composites at very low weight, the fiber composite component is preferably a carbon fiber composite component.

• – Formen einer Aussparung in einem Faserverbundbauteil,
• – Bereitstellen eines Befestigungselements, das einen ersten Bereich, einen zweiten Bereich und einen Warmumformbereich, der zwischen dem ersten Bereich und dem zweiten Bereich angeordnet ist, umfasst, wobei der Warmumformbereich einen thermoplastischen Werkstoff umfasst,
• – mindestens teilweises Einbringen des ersten Bereichs des Befestigungselements in die Aussparung und
• – Bilden einer formschlüssigen Verbindung zwischen dem Befestigungselement und dem Faserverbundbauteil durch Formen einer Schulter mittels Warmumformen des Warmumformbereichs des Befestigungselements

gekennzeichnet ist. Durch das erfindungsgemäße Verfahren ist auf einfache und kostengünstige Weise ohne großen technischen Aufwand, ein Faserverbundbauteil mit einem Befestigungselement herstellbar, wobei über das Befestigungselement mit dem Faserverbundbauteile mindestens ein weiteres Bauteil, ebenfalls stabil und dauerhaft und vorzugsweise lösbar, verbindbar ist. Das mindestens teilweise Einbringen des Befestigungselements in eine entsprechend vorbereitete Aussparung in einem Faserverbundbauteil stellt hierbei eine Verankerung des Befestigungselements in dem Faserverbundbauteil bereit. Durch den Schritt des Warmumformens des Warmumformbereichs des Befestigungselements, der dadurch möglich ist, dass dieser Warmumformbereich, und vorzugsweise auch die übrigen Bestandteile des Befestigungselements, einen thermoplastischen Werkstoff, umfassen, wird mindestens eine Schulter ausgebildet. Die durch Warmumformen geformte Schulter bildet zudem mit dem umgebenden Faserverbundwerkstoff des Faserverbundbauteils eine auf Dauer stabile und mechanisch belastbare, formschlüssige, und vorzugsweise auch stoffschlüssige Verbindung. Bei dieser Art der Befestigung des Befestigungselements an dem Faserverbundbauteil wird das Faserverbundbauteil im Wesentlichen nicht deformiert oder in seinen strukturellen oder mechanischen Eigenschaften, beeinträchtigt, sondern bildet mit dem Befestigungselement eine stabile Einheit, was ein dauerhaftes Befestigen eines weiteren Bauteils an dem erfindungsgemäß hergestellten Faserverbundbauteil möglich macht.Likewise in accordance with the invention, a method is also described for producing a fiber composite component with a fastening element, which is characterized by the steps:

• Forming a recess in a fiber composite component,
• Providing a fastener comprising a first region, a second region, and a hot working region disposed between the first region and the second region, the hot working region comprising a thermoplastic material,
• - At least partially introducing the first portion of the fastener into the recess and
• Forming a positive connection between the fastener and the fiber composite member by forming a shoulder by hot working the hot working portion of the fastener

is marked. The inventive method can be produced in a simple and cost-effective manner without great technical effort, a fiber composite component with a fastener, via the fastener to the fiber composite components at least one other component, also stable and durable and preferably releasably connectable. The at least partial introduction of the fastening element into a correspondingly prepared recess in a fiber composite component hereby provides anchoring of the fastening element in the fiber composite component. By virtue of the step of hot-forming the hot-forming region of the fastening element, which is possible due to the fact that this hot-forming region, and preferably also the other constituents of the fastening element, comprise a thermoplastic material, at least one shoulder is formed. The shaped by hot forming shoulder also forms with the surrounding fiber composite material of the fiber composite component in the long term stable and mechanically strong, form-fitting, and preferably also cohesive connection. In this type of attachment of the fastener to the fiber composite component, the fiber composite component is substantially not deformed or impaired in its structural or mechanical properties, but forms a stable unit with the fastener, allowing a permanent attachment of another component to the fiber composite component produced according to the invention ,

The developments, advantages and effects according to the invention described for the fastening element according to the invention and the fiber composite component are also applicable to the method according to the invention for producing a fiber composite component.

Preferably, the hot forming includes a Heißstemmvorgang, as this is the shoulder in the fastener with high geometric precision without great technical effort can be formed.

Due to the fact that the first region of the fastening element to be introduced into the recess is preferably not cylindrical, a permanently stable anchoring in the fiber composite component is promoted, especially when torsional forces act.

Further advantageously, a contact surface is provided on the first region of the fastening element, which is arranged on the fiber composite component and thus a slipping or slipping out of the fastener from or into the fiber composite component, particularly effectively prevented.

For the reasons given above for the fiber composite component according to the invention, the second region of the fastening element preferably comprises a threaded bolt, a C-clip, a snap hook, a ball / socket system or the like and / or the fiber composite component is a carbon fiber composite component.

• – Es wird ein Befestigungselement bereitgestellt, das auf einfache Art und Weise mit einem Faserverbundbauteil verbunden werden kann und über das eine auf Dauer stabile Verbindung des Faserverbundbauteils mit einem weiteren Bauteil herstellbar ist.
• – Es wird ein Faserverbundbauteil mit integriertem, dauerhaft stabil angebrachtem Befestigungselement bereitgestellt.
• – Durch die spezifische Struktur und Anordnung des Befestigungselements wird die Stabilität, insbesondere die Festigkeit und Steifigkeit des Faserverbundbauteils im Wesentlichen nicht beeinträchtigt.
• – Das Faserverbundbauteil zeigt trotz des Anbringens eines Befestigungselements ein optimiertes Setzungsverhalten, eine hohe Deformationsstabilität und gute Korrosionsstabilität.
• – Das Faserverbundbauteil kann über das vorgesehene Befestigungselement einfach mit weiteren Bauteilen verbunden werden.
• – Die Verbindung mit weiteren Bauteilen kann lösbar ausgeführt werden.
• – Ebenfalls lässt sich das erfindungsgemäße Faserverbundbauteil mit Standardprozessen ohne hohen technischen Aufwand kostengünstig herstellen.

Due to the solution according to the invention and the developments according to the invention, the following advantages result:

• A fastening element is provided which can be connected in a simple manner to a fiber composite component and via which a permanently stable connection of the fiber composite component to another component can be produced.
• - There is provided a fiber composite component with integrated, permanently stable attached fastener.
• - Due to the specific structure and arrangement of the fastener stability, in particular the strength and rigidity of the fiber composite component is not substantially impaired.
• - The fiber composite component shows, despite the attachment of a fastener optimized settlement behavior, high deformation stability and good corrosion resistance.
• - The fiber composite component can be easily connected via the provided fastener with other components.
• - The connection with other components can be carried out detachable.
• - Likewise, the fiber composite component according to the invention can be produced inexpensively with standard processes without high technical complexity.

Further details, features and advantages of the invention will become apparent from the following description and the figures. Show it:

1 a schematic sectional view of a fastener according to an advantageous embodiment of the invention and

2 a schematic sectional view of a fiber composite component according to an advantageous embodiment of the invention with the fastener from 1 ,

In the figures, only the parts of interest here Fasenrerbundbauteils and its components are shown, all other elements are omitted for clarity. In the figures, like reference numerals designate like components.

1 shows a schematic sectional view of a fastener 1 before introduction into a fiber composite component. The fastener 1 has a first area 2 , a second area 4 and an intermediate hot working area 3 on.

The first area 2 is intended to be placed in a recess in a fiber composite component to an anchorage of the fastener 1 secure in the fiber composite component.

At the bottom of the first area 2 is a contact surface 5 arranged, which is intended to abut against a fiber composite component. The contact surface 5 , which can also be referred to as a flange, is characterized by a relative to the rest of the fastener 1 widened diameter, causing the fastener 1 is secured against slipping or slipping in or through a fiber composite component.

The hot forming area 3 , and preferably all components of the fastener, 1 are formed of a thermoplastic material. The hot forming area 3 is to form a shoulder by hot forming the fastener 1 provided in this area, whereby a positive and preferably also cohesive connection can be provided with a fiber composite component, the permanent fixation of the fastener 1 secured to the fiber composite component.

To the hot forming area 3 closes the second area 4 on, which has a device or structure for fixing a further component, which is preferably designed as a thread, C-clip, snap hook or the like. This can be done with a further component a permanently stable and preferably detachable connection and attachment of the fiber composite component according to the invention.

2 shows a schematic sectional view of a fiber composite component 7 According to an advantageous embodiment of the invention, the fastener 1 out 1 contains. Shown in detail is a fiber composite component 7 , which is preferably formed as a carbon fiber composite component, and here by way of example a fiber composite layer 6 contains.

The fiber composite layer 6 has a recess 8th on, which is exemplified here as a perforation, in which the first area 2 of the fastener 1 is introduced so that the fastener 1 stable with the fiber composite layer 6 and thus with the fiber composite component 7 connected is.

At the lower end of the fiber composite component 7 is the contact surface 5 of the fastener 1 arranged, which is a slipping or slipping of the fastener 1 in or through the fiber composite component 7 , prevented.

By hot forming, preferably by hot stamping, is at the upper end of the fiber composite component 7 from the hot forming area 3 of the fastener 1 one shoulder 9 emerged, which is a permanent anchorage of the fastener 1 in the fiber composite component 7 by forming a form-fitting, and preferably also a material connection with the fiber composite component 7 , secures.

By introducing the first area 2 of the fastener in the recess 8th at the fiber composite component 7 and the process of hot forming, thus, a stable connection between the fastener 1 and the fiber composite component 7 produced, wherein a deformation, partial destruction or otherwise affecting the properties of the fiber composite component 7 , such as B. change whose settlement behavior, is prevented. This is a mechanically very stable fiber composite component 7 with integrated fastening element 1 provided, which is suitable for permanent stable connection or attachment of another component or other components.

The above-described fiber composite component is preferably used in a motor vehicle.

The foregoing description of the present invention is for illustrative purposes only, and not for the purpose of limiting the invention. Various changes and modifications are possible within the scope of the invention without departing from the scope of the invention and its equivalents.

LIST OF REFERENCE NUMBERS

1

fastener

2

first area

3

Warmumformbereich

4

second area

5

contact surface

6

intermediate area

7

Fiber composite component

8th

recess

9

shoulder

Claims (10)

Fastening element ( 1 ) comprising a first area ( 2 ), a second area ( 4 ) and a hot forming area ( 3 ) between the first area ( 2 ) and the second area ( 4 ), wherein at the first area ( 2 ) a contact surface ( 5 ) for arrangement on a fiber composite component ( 7 ), and wherein the hot forming area ( 3 ) comprises a thermoplastic material. Fastening element according to claim 1, characterized in that the first region ( 2 ) is not cylindrical and / or that the second area ( 4 ) comprises a threaded bolt, a C-clip, a snap hook, a ball / socket system or the like. Fiber composite component comprising a fastening element ( 1 ), a first area ( 2 ), a second area ( 4 ) and at least one between the first area ( 2 ) and the second area ( 4 ) arranged shoulder ( 9 ) associated with the fiber composite component ( 7 ) forms a positive connection, wherein the shoulder ( 9 ) comprises a thermoplastic material and wherein the first region ( 2 ) of the fastener ( 1 ) at least partially in a recess ( 8th ) in the fiber composite component ( 7 ) is arranged. Fiber composite component according to claim 3, characterized in that the shoulder ( 9 ) is formed by hot forming and in particular by hot-setting of the thermoplastic material. Fiber composite component according to claim 3 or 4, characterized in that the (in the recess 8th ) in the fiber composite component ( 7 ) arranged first area ( 2 ) of the fastener ( 1 ) is not cylindrical and / or that at the first area ( 2 ) a contact surface ( 5 ) arranged on the fiber composite component ( 7 ) is present. Fiber composite component according to one of claims 3 to 5, characterized in that the second region ( 4 ) of the fastener ( 1 ) comprises a threaded bolt, a C-clip, a snap hook, a ball / socket system or the like and / or that the fiber composite component ( 7 ) is a carbon fiber composite component. Method for producing a fiber composite component ( 7 ) with a fastening element ( 1 ), characterized by the steps: - forming a recess ( 8th ) in a fiber composite component ( 1 ), - providing a fastener ( 1 ), a first area ( 2 ), a second area ( 4 ) and a hot forming area ( 3 ) between the first area ( 2 ) and the second area ( 4 ), wherein the hot forming area ( 3 ) comprises a thermoplastic material, - at least partially introducing the first region ( 2 ) of the fastener ( 1 ) in the recess ( 8th ) and - forming a positive connection between the fastener ( 1 ) and the fiber composite component ( 7 ) by shaping a shoulder ( 9 ) by hot forming the hot forming area ( 3 ) of the fastener ( 1 ). A method according to claim 7, characterized in that the hot forming comprises a Heißstemmvorgang. A method according to claim 7 or 8, characterized in that in the recess ( 8th ) to be introduced first area ( 2 ) of the fastener ( 1 ) is not cylindrical and / or that at the first area ( 2 ) a contact surface ( 5 ) provided on the fiber composite component ( 7 ) is arranged. Method according to one of claims 7 to 9, characterized in that the second area ( 4 ) of the fastener ( 1 ) comprises a threaded bolt, a C-clip, a snap hook, a ball / socket system or the like and / or that the fiber composite component ( 7 ) is a carbon fiber composite component.

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