Component Arrangement

Abstract

The invention provides an arrangement which has a first component and a second component fastened to each other in a clamping manner. At least the first or second component is a fiber/plastic composite component. The arrangement has a securing element which generates a pressing force that presses the components against each other such that the components are secured to each other in a clamped manner. A friction-coefficient-increasing element is arranged between the first and second components in a pressing region in which the first and second components are pressed against each other by the pressing force. The friction-coefficient-increasing element increases a static friction produced for the pressing force in contrast to a case in which such an element is not arranged in the pressing region. The invention also provides a method for fastening the first component to the second component.

Claims

1. An arrangement, comprising: a first component and a second component, wherein at least the first or second component is a fiber plastic composite component; and a fastener which generates a pressing force pressing the components against each other in such a manner that the components are fastened to each other in a clamping manner, wherein a friction-coefficient-increasing element is arranged between the first and second components in a pressing region in which the first component and the second component are pressed against each other by the pressing force, and the friction-coefficient-increasing element increases a static friction arising for the pressing force in comparison to a case in which the friction-coefficient-increasing element is not arranged in the pressing region.

2. The arrangement according to claim 1, wherein the friction-coefficient-increasing element is a coating of one of the components.

3. The arrangement according to claim 2, wherein the friction-coefficient-increasing element contains hard particles.

4. The arrangement according to claim 3, wherein the hard particles are silicon carbide particles and/or quartz particles and/or corundum (Al2O3) particles and/or emery particles and/or pumice stone particles and/or garnet particles and/or diamond particles.

5. The arrangement according to claim 3, wherein the hard particles are applied to the first and/or second component by an adhesive agent.

6. The arrangement according to claim 4, wherein the hard particles are applied to the first and/or second component by an adhesive agent.

7. The arrangement according to claim 5, wherein the adhesive agent is a paste or an adhesive.

8. The arrangement according to claim 6, wherein the adhesive agent is a paste or an adhesive.

9. The arrangement according to claim 1, wherein the fiber plastic composite component has an anti-corrosion layer on a surface facing the other component and/or on a surface facing away from the other component.

10. The arrangement according to claim 9, wherein the anti-corrosion layer is a glass fiber layer.

11. The arrangement according to claim 8, wherein the fiber plastic composite component has an anti-corrosion layer on a surface facing the other component and/or on a surface facing away from the other component.

12. The arrangement according to claim 11, wherein the anti-corrosion layer is a glass fiber layer.

13. The arrangement according to claim 10, wherein the first and second components are fiber plastic composite components, and the first and second components have an anti-corrosion layer on the surface facing the other component and on the surface facing away from the other component.

14. The arrangement according to claim 13, wherein the anti-corrosion layer is a glass fiber layer.

15. The arrangement according to claim 9, wherein the fastener is formed from a metal and lies against the anti-corrosion layer on the fiber plastic composite component.

16. The arrangement according to claim 14, wherein the fastener is formed from a metal and lies against the anti-corrosion layer on the fiber plastic composite component.

17. A method for fastening a first component to a second component, wherein at least the first or second component is a fiber plastic composite component, the method comprising the steps of: applying a friction-coefficient-increasing element to the fiber plastic composite component or to the other component; and fastening the components in a clamping manner such that the friction-coefficient-increasing element is arranged between the components in a pressing region in which the components are pressed against each other, wherein the friction-coefficient-increasing element acts in such a manner that a static friction arising for the components connected in the clamping manner is increased in comparison to a case in which the friction-coefficient-increasing element is not arranged in the pressing region.

18. The method according to claim 17, wherein, in the step of applying a friction-coefficient-increasing element, the friction-coefficient-increasing element is applied to the first or second component by plasma coating.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0046] FIG. 1 is a view of a first variant of an arrangement according to the invention, wherein a fastener provided for the clamping fastening of the two components is formed from a screw provided with a nut;

[0047] FIG. 2 is a view of a further variant of an arrangement according to the invention which is identical to the arrangement shown in FIG. 1 except for the difference that the two components are realized by a fiber plastic composite component; and

[0048] FIG. 3 is a view of a further variant of the arrangement according to the invention, wherein, in this variant, a screw which is extended in relation to FIGS. 1 and 2 and is screwed into a threaded holder is used as the fastener.

DETAILED DESCRIPTION OF THE DRAWINGS

[0049] FIG. 1 shows a first variant of an arrangement 100 according to the invention.

[0050] The arrangement 100 according to the invention has a first component 110 and a second component 120 which are fastened to each other in a clamping manner (with a force fit) via a fastening element 130.

[0051] The components 110, 120 are preferably components of a motor vehicle or motorcycle. For example, the first component 110 and the second component 120 are shell elements in a floor region of a motor vehicle.

[0052] The arrangement 100 according to the invention is in particular also an arrangement which is subjected to a shearing stress when loaded as intended. That is to say, shearing forces, i.e., forces parallel to the surfaces of the components 110, 120, act on the arrangement 100 according to the invention.

[0053] In this first variant of the arrangement 100 according to the invention, the first component 110 is a fiber plastic composite component (FPC component). Depending on the intended loading of the arrangement 100 according to the invention, various reinforcing fibers in terms of type and form, for example carbon fibers in the form of mats and wovens, can be used in the FPC component 110. The reinforcing fibers of the FPC component 110 are embedded in a matrix material which can be, for example, a thermosetting plastic or a thermoplastic.

[0054] The FPC component 110 is preferably to this extent a CFP component.

[0055] The FPC component 110 bears a respective anti-corrosion layer 111, which can be formed, for example, from a glass fiber layer, on a surface facing the second component 120 and on a surface facing away from the second component 120.

[0056] In this first variant of the arrangement 100 according to the invention, the second component 120 is an aluminum component.

[0057] The fastener 130 is preferably formed, as illustrated, from a screw which is guided through a respective passage in the first component 110 and the second component 120.

[0058] The screw 130 lies with its screw head 132 via a plain washer 131 against the FPC component 110. The plain washer 131 is preferably provided for the definition of a restricted surface pressure.

[0059] The screw 130 is provided on a side facing away from the screw head 132, i.e. on the side of the second component 120, with a nut 140. The nut 140 lies via a further plain washer 141 against the second component 120.

[0060] In general, the arrangement 100 may also be designed in such a manner that the arrangement of the screw head 132 and the nut 140 are interchanged, i.e., the screw head 132 lies via the corresponding plain washer 131 against the second component 120, and the nut 140 in turn lies via the corresponding plain washer 141 against the first component 110.

[0061] The nut 140 is fastened to the screw 130 via an adhesive as a sealing measure so that no moisture can enter the passages in the component. The adhesive also acts as a screw securing measure.

[0062] The adhesive may be a micro-encapsulated adhesive.

[0063] According to the invention, a friction-coefficient-increasing element 150 is arranged between the first component 110 and the second component 120. The friction-coefficient-increasing element 150 has such an effect that, for the material pairing of fiber plastic composite/aluminum, a (static) coefficient of friction arises which is increased in comparison to the case in which the friction-coefficient-increasing element 150 is not present. This means that, by use of the friction-coefficient-increasing element 150, the static friction or adhesion which opposes the acting shearing forces and arises from the prestressing force or the pressing force of the screw 130 and the coefficient of friction is greater than without the provision of the friction-coefficient-increasing element 150.

[0064] The friction-coefficient-increasing element 150 can be, for example, hard particles which have been applied to the pressing region by a paste or a synthetic resin.

[0065] Very particularly preferably, the friction-coefficient-increasing element 150 can be a surface coating, produced via a plasma coating, either of the first component 110 or of the second component 120.

[0066] Furthermore preferably, the friction-coefficient-increasing element 150 can be a roughened disk or a piece of a roughened sheet. Preferred materials for the hard particles are, for example, silicon carbide hard particles or diamond particles.

[0067] The increased static friction gives rise, according to the invention, to the possibility either of fastening components by smaller fastener or screws 130 because a higher static friction is already achieved with a lower prestressing force or pressing force, or of achieving an increased static friction for certain fasteners.

[0068] A second variant 200 of the arrangement according to the invention is explained with reference to FIG. 2. Elements of this arrangement 200 that are identical to those of the first variant bear the identical reference signs and are not explained once again. As is apparent from FIG. 2, the difference over the arrangement 100 of FIG. 1 consists in that the second component 220 is also an FPC component. The second component 220 is preferably, like the first component 110, also a carbon fiber plastic composite component (CFP component).

[0069] The second component 220, like the first component 110, bears an anti-corrosion layer 221 both on a surface facing the first component 110 and on a surface facing away from the first component. The anti-corrosion layer 221 is preferably a glass fiber layer.

[0070] FIG. 3 shows a third variant 300 of the arrangement according to the invention, wherein this arrangement 300 is identical to the arrangement 100 of FIG. 1 except for the difference that the plain washer 141 and the nut 140 shown in FIG. 1 are replaced by a threaded holder 340 and the screw 330 is longer.

[0071] The threaded holder 340 enables the screw length to be freely adapted to the arrangement 300 or the components 110, 120. That is to say, a longer screw 330 can be used for the fastening of the components 110, 120, which leads to the settling behavior of the screw connection being further reduced. The threaded holder 340 is preferably fastened to the aluminum component or in general to the metal component 120 at points 341 by an integrally bonded connection, such as, for example, a welded joint.

[0072] Alternatively to the threaded holder 340, a rivet nut (not illustrated) fastened to the second component 120 can also be used.

[0073] To secure and seal the screw connection, a micro-encapsulated adhesive 342 can be provided again between the thread of the threaded holder 340 and the screw thread of the screw 330.

[0074] Alternatively, the threaded holder 340 can be configured in such a manner that it forms a blind hole in which the thread for the screw 330 is provided.

[0075] In particular, the use of the friction-coefficient-increasing element 150 leads to an increased (static) coefficient of friction arising for the material pairing of the first and second components 110, 120. Furthermore, in particular the threaded holder of the third variant of the arrangement according to the invention leads to a longer screw which has greater elasticity and therefore consequently to a reduction in the settling behavior of the screw connection.

[0076] In particular, the friction-coefficient-increasing element 150 also in combination with the threaded holder 340 leads to detaching of the screw connection being prevented.

[0077] The arrangement according to the invention is used in particular in motor vehicles for the connection of a CFP shear area and an aluminum axle support.

[0078] The invention likewise relates to a method for fastening the first component to the second component.

[0079] The method according to the invention in particular includes a preparing step in which the friction-coefficient-increasing element 150 is applied to the first and/or the second component, and a fastening step following the preparing step, in which the components are fastened to each other in a clamping manner, specifically by use of the fastener explained above.

[0080] If the fastener is designed in the form of the screws which have been explained, the corresponding passage in the first and second components is formed before or after the preparing step.

[0081] In a particularly preferred embodiment, the friction-coefficient-increasing element 150 is produced on the components by plasma coating.

[0082] The foregoing disclosure has been set forth merely to illustrate the invention and is not intended to be limiting. Since modifications of the disclosed embodiments incorporating the spirit and substance of the invention may occur to persons skilled in the art, the invention should be construed to include everything within the scope of the appended claims and equivalents thereof.