Fastening element and method for mounting same
A fastening element for positive, materially integral and/or non-positive arrangement on or in a fiber composite component includes a sleeve-like portion, on the first end of which there is formed a tapering conical or cone-shaped portion in which a plurality of slots are made which are aligned in the direction of a longitudinal extent of the fastening element and in this way subdivide the conical or cone-shaped portion into individual segments. On the second end of the sleeve-like portion, there is arranged a holding portion which is angled at a right angle from the sleeve-like portion and in this way enlarges an outer diameter of the sleeve-like portion and forms planar bearing surfaces. A method is also described for mounting a fastening element.
1. A securing element for positive-locking, materially engaging and/or non-positive-locking arrangement on or in a composite fiber component comprising:
a sleeve with an outer side and an inner side, wherein the outer side and the inner side are directly opposite each other through a wall of the sleeve,
wherein the inner side of the sleeve includes an inner thread;
an acutely tapering conical portion at a first end of the sleeve,
wherein the conical portion includes a plurality of slots which are orientated in the direction of a longitudinal extent of the securing element and which consequently subdivide the conical portion into individual segments;
a retention portion at a second end of the sleeve,
wherein the retention portion is bent at right-angles away from the sleeve and which consequently increases an outer diameter of the sleeve and forms planar abutment faces; and
a material weakening in a transition region between the sleeve and the conical portion.
2. The securing element as claimed in claim 1 , wherein the material weakening is a perforation and/or a cross-section reduction.
3. The securing element as claimed in claim 1 , wherein the outer side of the sleeve includes a surface structure.
4. The securing element as claimed in claim 3 , wherein the surface structure is a grain and/or a corrugation.
5. A method of assembling the securing element as claimed in claim 1 , wherein the securing element is heated to a predeterminable temperature which is above a melting temperature of a thermoplastic matrix of the composite fiber component and in the heated state is pushed or pressed through the composite fiber component in such a manner that a second abutment face of the retention portion of the securing element is in planar abutment with a first side of the composite fiber component and the conical portion of the securing element protrudes beyond the composite fiber component at a second side thereof.
6. The method as claimed in claim 5 , wherein, while the hot securing element is pressed through the composite fiber component, the fibers of the composite fiber component are urged through the conical portion of the securing element so as not to be destroyed in such a manner that they are positioned around the sleeve of the securing element and a new fiber orientation is thereby formed.
7. The method as claimed in claim 5 , wherein there is introduced into the sleeve a screw whose shaft presses apart individual segments of the conical portion which, when the structural element to be secured is subsequently arranged and a nut is screwed onto the shaft of the screw, are deformed to such an extent that they are bent at right-angles away from the sleeve and thereby increase an outer diameter of the sleeve and form planar abutment faces.
8. The method as claimed in claim 5 , wherein the individual segments of the conical portion are bent by means of a mandrel, wherein there is formed on or in the sleeve of the securing element the inner thread into which there is screwed a conventional screw whose screw head presses the structural element to be secured in a planar manner against a first abutment face formed by the individual segments of the conical portion.