Load introduction device and method for adhesive bonding of a load introduction device
AssigneeCarbon Truck & Trailer GmbH
InventorsBenedikt SCHULTE, Markus BADE, Hauke KÜHL, Gerret KALKOFFEN, Jan HADAMUS
Life of this patent
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Abstract
A load introduction device and a method for adhesive bonding of a load introduction device for fiber composite materials is disclosed. A sealant, particularly a first adhesive is used in the creation of a cavity and in the creation of a secured arrangement for the injection of adhesive into the cavity.
Claims16
A method for connection of at least one fiber composite work piece, especially a longitudinal member of a vehicle, with a load introduction device, especially a metallic load introduction device, said method comprising:
- a. making available at least one fiber composite work piece and making available a load introduction device having at least one adhesive surface;
- b. positioning the load introduction device relative to the at least one fiber composite work piece so that at least one cavity is produced between the at least one fiber composite work piece and the least one adhesive surface of the load introduction device, and securing an arrangement of the fiber composite work piece and the load introduction device in such a way that the arrangement is suited to withstand a first pressure in the at least one cavity for at least a first time period or a first injection loading through injection of an adhesive into the at least one cavity, especially without permanent and/or temporary alteration of the arrangement;
- c. injection of the adhesive at least at a second pressure in at least one second time period into the at least one cavity, especially through a cutout or a plurality of cutouts in the load introduction device, especially boreholes in the load introduction device;
- i. until the adhesive reaches an expansion, especially a pre-planned expansion, which is defined over at least 10% of a contour of the adhesive expansion in the at least one cavity and/or the contour of the load introduction device by the contour of the load introduction device and/or by control cutouts arranged in the load introduction device, or which corresponds to the contour of the load introduction device and/or is parallel to the contour of the load introduction device, especially in view of a fiber composite material;
- or
- ii. until an amount of adhesive is injected which results in an expansion, especially an intended expansion, of the adhesive over at least 10% of the contour of the adhesive expansion in the at least one cavity and/or the contour of the load introduction device, by the contour of the load introduction device and/or by control cutouts arranged in the load introduction device, especially boreholes, or which corresponds to and/or is parallel to, the contour of the load introduction device;
- and/or
- iii. wherein the expansion of the adhesive between the fiber composite material and the load introduction device is not hindered and/or limited by the load introduction device, the fiber composite material, and/or other media and until the cavity is at least 50% filled with adhesive, wherein the at least one second pressure does not exceed the first pressure and the second time period does not exceed the first time period, or the loading via injection does not exceed the first injection loading, and the arrangement of the fiber composite work piece and the load introduction device is secured at least for the duration of injection by securing the load introduction device relative to the fiber composite work piece by external means, at least in relation to the forces which are exerted by the injection, the external means comprises one of at least one robot arm, at least one tensioning means, at least one holding clamp, at least one holding means, and at least one pressing means.
A method for connection of at least one fiber composite work piece, especially a longitudinal member of a vehicle with a load introduction device, especially a metallic load introduction device, said method comprising:
- a. providing at least one fiber composite work piece and providing a load introduction device having at least one adhesion surface;
- b. positioning the load introduction device relative to the at least one fiber composite work piece while using at least one sealant so that at least one cavity is produced with a cavity volume between the at least one fiber composite work piece and the at least one adhesion surface of the load introduction device, wherein the cavity has n areas on which the cavity volume is not limited by the at least one adhesion surface of the load introduction device and the at least one adhesive surface of the at least one fiber composite work piece, wherein n is equal to or greater than one and the length measured perpendicular to a shortest connecting line between the fiber composite work piece and the at least one adhesion surface of the load introduction device, which n areas amount altogether to at least 5 cm and so that the n areas are closed over at least 90% of an overall length of the n areas by at least one sealant, and wherein the at least one sealant is in contact with the at least one fiber composite work piece and/or the load introduction device, especially with the at least one adhesion surface of the load introduction device, and/or is configured as integral with the at least one fiber composite work piece and/or the load introduction device, and the arrangement of the fiber composite work piece and the load introduction device is secured so that the arrangement is suited to resist a first pressure in the cavity for at least a first time period and/or a first injection load resulting from the injection of adhesive into the cavity and without parting and especially without permanent alteration of the arrangement;
- c. injection of the adhesive with at least a second pressure in at least a second time period into the cavity until the cavity is at least 50% filled with the adhesive, wherein the at least one second pressure does not exceed the first pressure and the second time period does not exceed the first time period or the loading by injection does not exceed the first injection loading, and wherein the arrangement of the fiber composite work piece and the load introduction device is secured by exerting a force on the load introduction device and/or the fiber composite work piece that compresses the at least one sealant at least for the duration of the injection, and wherein the securing is effected by fixing, at least with respect to the forces that are exerted by the injection, the load introduction device relative to the fiber composite work piece by external means, and wherein the external means comprises one of at least one robot arm, at least one tensioning means, at least one holding clamp, at least one holding means, and at least one pressing means.
(canceled)
A load introduction device for introducing a load into at least one fiber composite work piece in an adhesively bonded state with the at least one fiber composite work piece, wherein the load introduction device has at least one adhesion surface for adhesive bonding with the at least one fiber composite work piece by means of adhesive, wherein the load introduction device has at least one device for injection of adhesive through the load introduction device and the at least one adhesion surface, and the geometry of the load introduction device is such that with arrangement of the at least one adhesion surface over a surface of the at least one fiber composite work piece at an interval between 1 and 15 mm and with injection of the adhesive through the at least one device for injection of adhesive, the adhesive is distributed between the load introduction device and the at least one fiber composite work piece so that a contour of the adhesive covers over at least 10%, especially at least 50%, of an extension of the contour of the load introduction device in viewing the surface of the at least one fiber composite work piece and/or runs parallel to the contour of the load introduction device without being limited in the adhesive's spreading between the load introduction device and the at least one fiber composite work piece by the load introduction device and/or other media, and/or the geometry of the load introduction device is so configured that the contour of the load introduction device or of at least one of the load introduction device's sides and/or adhesive surface segments, squared in relation to a surface of the load introduction device's sides and/or adhesive surface segments is greater than 18.
Dependencies are inferred from the claim text.