MOTOR VEHICLE COMPONENT COMPRISING TWO PROFILES

Description

Field of the invention

[0001] The present invention relates to a motor vehicle component, in particular a sill or a motor vehicle floor, comprising a first profile and a second profile. The invention also relates to a method for producing such a motor vehicle component. State of the art

[0002] It is known that some motor vehicle components are assembled from multiple, often large, profiles. In particular, the sills of a motor vehicle, for example, can be formed from two or more hollow profiles extending in the longitudinal direction of the vehicle. Such profiles can be bonded together over large areas at adhesive surfaces, i.e., they can have large contact surfaces where they are bonded together. Such a motor vehicle component can, in particular, be a multi-part sill, which can be composed of several extruded profiles.

[0003] The document DE 10 2018 127368 A1 discloses a side skirt with a first profile and a second profile according to the preamble of claim 1.

[0004] Such large-area bonds cannot be reliably produced. Uneven distribution of the adhesive can result in non-crosslinked areas, for example, due to air pockets. The properties of the resulting bonds then do not match those determined using a simulation program. As a result, the results of fatigue strength and crash simulations can be better than reality—the manufactured automotive components actually exhibit poorer strength properties than planned. Summary of the invention

[0005] It is an object of the invention to provide a motor vehicle component, in particular a sill of a motor vehicle, whose operational strength and crash behavior can be better predicted. A further object of the invention is to provide a simple method for producing such a motor vehicle component whose operational strength and crash behavior can be better predicted.

[0006] The object is achieved by a motor vehicle component, in particular a sill or a motor vehicle floor, comprising a first profile and a second profile, wherein the first profile and the second profile each have an adhesive surface, wherein the first and the second profile are glued to one another at their adhesive surfaces by an adhesive, wherein the adhesive surface of the first profile and / or the adhesive surface of the second profile has at least one groove, wherein the adhesive completely covers the respective adhesive surface in those areas in which no groove is formed and does not cover it in those areas in which a groove is formed.

[0007] According to the invention, at least one of the two adhesive surfaces of the profiles to be joined has at least one groove, i.e. a recess, with, for example, straight or curved lateral boundaries, with corners or rounded corners at the edges, wherein the recess is oriented inwards, away from the connecting partner. When the two adhesive surfaces of the profiles are pressed against each other to create the bond, a bond actually forms only in those areas that are not located in a groove, i.e. a recess. Since the essentially large adhesive surfaces are divided into several smaller adhesive surfaces by the groove or grooves, problems that occur with large adhesive surfaces, such as air pockets, are avoided.

[0008] The bonding surfaces and free spaces between the bonding surfaces are designed in such a way that a reproducible network of the defined actual bonding surfaces between the grooves is ensured and thus fatigue strength and crash simulations can be accurately reproduced.

[0009] The adhesive surface of the first and / or second profile is designed to be large overall, resulting in a large-area bond. Such a large adhesive surface preferably extends over at least 20 percent, particularly preferably at least 50 percent, in particular at least 70 percent of the length of a motor vehicle and / or over at least 20 percent, particularly preferably at least 50 percent, in particular at least 70 percent of the height of the motor vehicle component, in particular the height of the sill. Length and height specifications refer to an installation position of the motor vehicle component in a motor vehicle and the vehicle coordinates, i.e., the length and height dimensions of the motor vehicle (x and z directions).

[0010] Preferably, the adhesive surface is flat, except for the grooves. Preferably, the groove or grooves also have a flat base, which particularly preferably lies parallel to the adhesive surface.

[0011] The adhesive surface can be a boundary surface of a surface, i.e. a flat part of the profile.

[0012] In those areas in which a groove is formed, the adhesive surface is not covered by the adhesive. Preferably, there is essentially no adhesive in a groove. However, excess adhesive may be present, particularly at the edges of a groove, which does not significantly contribute to the bonding of the two profiles. In any case, the two profiles are bonded in the intermediate areas in which no groove is formed and not in the areas of the adhesive surface in which a groove is formed. The two profiles are joined together by the bonding. Another fastening means for joining the two profiles, such as screwing or punch rivets, is preferably not provided, but can be advantageous for faster handling of the joined components during assembly.

[0013] Preferably, the adhesive surface of the first profile and / or the adhesive surface of the second profile has at least two grooves, preferably more than two grooves, wherein the adhesive completely covers the respective adhesive surface in those areas in which no groove is formed and does not cover it in those areas in which a groove is formed, wherein preferably all grooves of the first and / or all grooves of the second profile are aligned parallel to one another.

[0014] For example, an individual groove can be approximately the same height (in the vehicle's z-direction) as the intermediate area of ​​the adhesive surface used for bonding between two grooves, or between 1 and 90 percent of the height of this intermediate area, preferably between 5 and 70 percent, particularly preferably between 10 and 60 percent. The height of a groove in the vehicle's z-direction can be, for example, 0.2 to 10 centimeters, preferably 0.5 to 5 centimeters. The depth of a groove can be, for example, 1 to 10 millimeters, preferably 2 to 7 millimeters.

[0015] The groove or grooves preferably run in a longitudinal direction of the motor vehicle component, in particular in a longitudinal direction of the sill.

[0016] Preferably, the adhesive surface of the first profile and the adhesive surface of the second profile have at least two grooves, preferably more than two grooves, with the grooves of the first profile being arranged opposite the grooves of the second profile. Thus, the intermediate regions forming the bonds of the adhesive surface are also arranged opposite one another.

[0017] According to one embodiment, the grooves of the adhesive surfaces of the first and / or the second profile each represent a U-shape of a surface of the profile which forms the respective adhesive surface, so that the surface on the side opposite the adhesive surface has, in the region of a groove, an elevation away from the adhesive surface.

[0018] Preferably, the first profile and / or the second profile is produced by a continuous manufacturing process, in particular by extrusion.

[0019] Preferably, the first profile and / or the second profile is a hollow profile.

[0020] A method for producing a motor vehicle component as described above can provide that the first profile and the second profile are provided separately from one another, wherein the adhesive surface of the first profile and / or the adhesive surface of the second profile has at least one groove, preferably a plurality of grooves, that adhesive is then applied to the adhesive surface of the first profile and / or to the adhesive surface of the second profile, that the first profile and the second profile are then pressed against one another, wherein the adhesive completely covers the respective adhesive surface of the first and second profile in those regions in which no groove is formed and does not cover it in those regions in which a groove is formed. When the two profiles are pressed against one another, they can be glued to one another and thus joined.The groove or grooves preferably run in the longitudinal direction of the motor vehicle component, in particular the sill or motor vehicle floor. The adhesive can be applied—in particular in the form of adhesive beads—preferably also in the longitudinal direction of the motor vehicle component to the adhesive surface of the first profile and / or to the adhesive surface of the second profile, particularly preferably to the intermediate regions of the adhesive surface in which no groove is formed. The groove or grooves are at least largely uncoated with adhesive, so that no bonding occurs in the grooves, i.e., in the recesses.

[0021] The grooves can be produced, for example, by extrusion, forming or milling. Brief description of the drawings

[0022] The invention is described below by way of example with reference to the drawings. Fig. 1 a, b, c is a schematic representation of method steps in the production of a motor vehicle component not according to the invention. Fig. 2 is a schematic representation of a profile for a motor vehicle component according to the invention. Fig. 3 is a schematic representation of a motor vehicle component according to the invention. Fig. 4 is a schematic representation of another motor vehicle component according to the invention. Fig. 5 is a schematic representation of a motor vehicle component not according to the invention (left), and of a corresponding motor vehicle component according to the invention in a first variant (middle) and of a corresponding motor vehicle component according to the invention in a second variant (right). Fig. 6 is a three-dimensional representation of another motor vehicle component according to the invention, namely a sill of a motor vehicle. Detailed description of the invention

[0023] In Fig. 1a, b, c show steps of a method for producing a motor vehicle component not according to the invention in order to demonstrate the problem of a large-area bonding used therein.

[0024] As in Fig. 1a As shown, a first profile 1, which is designed here as a flat component, is first provided with an adhesive 4 on one side of an adhesive surface 3. In Fig. 1a On the left is the component from the side in which Fig. 1a right from the front. In the right illustration of the Fig. 1a It can be seen that the adhesive 4 is applied to the adhesive surface 3 in the form of adhesive beads.

[0025] As in Fig. 1b As shown, a second profile 2 is brought closer to the first profile 1. Fig. 1c shows on the left, shown from the side, that the first profile 1 is pressed with the second profile 2. The illustration on the right in the Fig. 1c shows a section AA, according to the left figure of the Fig. 1c. The adhesive 4 is thus shown after pressing. By pressing the two components 1, 2 together to a defined adhesive gap, air pockets can form between the adhesive beads, which in Fig. 1c can be seen on the right as white areas within the adhesive 4.

[0026] Fig. 2 is a schematic representation of a simple first profile 1 for a motor vehicle component according to the invention. The first profile is designed as a flat product, for example as a sheet metal. It therefore consists of only one surface 6. One surface of the surface 6 forms the adhesive surface 3. On this side of the surface 6 there is an inward-facing groove 5 in the surface 6 and thus in the adhesive surface 3. The groove 5 is formed by a U-shaped deformation or pressing of the surface 6, so that an elevation 7 is formed on the opposite side of the surface 6. The adhesive surface 3 can be covered with adhesive 4.

[0027] Fig. 3 and Fig. 4 show a first profile according to Fig. 2 in a state in which the first profile 1 is glued to a second profile 2, wherein the second profile 2 can also have a groove 5 which is opposite the groove 5 of the first profile 1 ( Fig. 3 ), or the second profile 2 can also be flat, for example as a flat sheet ( Fig. 4 ). In each case, the groove 5 of the first profile 1 and, if applicable, of the second profile 2 is not covered with adhesive 4, the remaining sections of the adhesive surfaces are covered with the adhesive 4.

[0028] Fig. 5 shows schematically how a first profile 1 of a motor vehicle component not according to the invention (left) is replaced by a corresponding first profile 1 of a motor vehicle component according to the invention (middle and right in Fig. 5) can be replaced. In a vertical direction of a motor vehicle in which the first profile 1 is to be installed, the first profile 1 has a plurality of grooves 5, which can be produced by pressing or reshaping the surface 6 of the first profile 1. In the spaces between the grooves 5, adhesive 4 is located on the adhesive surface 3. On the side of the surface 6 opposite the grooves 5, this surface has elevations 7 (middle) or is flat (right).

[0029] Fig. 6 is a three-dimensional representation of another motor vehicle component according to the invention, namely a sill of a motor vehicle. The first profile 1 is a hollow profile that forms an outer side of the sill, and the second profile 2 is also a hollow profile and forms the inner side of the vehicle sill. The first and second profiles 1, 2 are designed as extruded profiles.

[0030] The first profile 1 and the second profile 2 each have an adhesive surface 3, wherein the first and the second profile 1, 2 can be glued together at their adhesive surfaces 3 by an adhesive 4.

[0031] The adhesive surface 3 of the first profile 1 and the adhesive surface 3 of the second profile 2 have a plurality of horizontally extending grooves 5 in the vertical direction, wherein the adhesive 4 completely covers the respective adhesive surface 3 in those regions in which no groove 5 is formed and at least substantially or entirely does not cover the respective adhesive surface 3 in those regions in which a groove 5 is formed. The bonding between the first profile 1 and the second profile 2 thus occurs only in the intermediate regions of the adhesive surface 3 in which no grooves 5 are formed.

[0032] The grooves 5 of the first profile 1 and the grooves 5 of the second profile 2 are aligned parallel to each other and are opposite each other.

[0033] The grooves 5 of the adhesive surfaces 3 of the first and second profiles 1, 2 are each formed as a U-shaped deformation of a surface 6 of the respective hollow profile 1, 2. This surface 6 thus has, on the side opposite the adhesive surface 3, in the region of the grooves 5, elevations 7 that point away from the adhesive surface 3. List of reference symbols

[0034] 1First profile 2Second profile 3Adhesive surface 4Adhesive 5Groove 6Surface 7Elevation

Claims

1. Motor vehicle component, in particular sill, comprising a first profile (1) and a second profile (2), wherein the first profile (1) and the second profile (2) each have a bonding surface (3), wherein the first and the second profile (1, 2) are adhesively bonded together at their bonding surfaces (3) by an adhesive (4), characterized in that the bonding surface (3) of the first profile (1) and / or the bonding surface (3) of the second profile (2) has at least one groove (5), wherein the adhesive (4) covers the bonding surface (3) completely in those regions in which a groove (5) has not been formed and does not cover the bonding surface in those regions in which a groove (5) has been formed.

2. Motor vehicle component according to Claim 1, characterized in that the bonding surface (3) of the first profile (1) and / or the bonding surface (3) of the second profile (2) has at least two grooves (5), preferably more than two grooves (5), wherein the adhesive (4) covers the bonding surface (3) completely in those regions in which a groove (5) has not been formed and does not cover the bonding surface in those regions in which a groove (5) has been formed, wherein preferably all the grooves (5) of the first profile (1) and / or all the grooves (5) of the second profile (2) are oriented parallel to one another.

3. Motor vehicle component according to Claim 2, characterized in that the grooves (5) of the first profile (1) are each arranged opposite the grooves (5) of the second profile (2).

4. Motor vehicle component according to at least one of the preceding claims, characterized in that the grooves (5) of the bonding surfaces (3) of the first and / or of the second profile (1, 2) each represent a U-shape of a surface (6) of the profile (1, 2) that forms the respective bonding surface (3), so that, on the side opposite the bonding surface (3), in the region of a groove (5), the surface (6) has in each case an elevation (7) away from the bonding surface (3).

5. Motor vehicle component according to at least one of the preceding claims, characterized in that the first profile (1) and / or the second profile (2) is produced by a continuous production process, in particular by extrusion.

6. Method for producing a motor vehicle component according to at least one of the preceding claims, characterized in that the first profile (1) and the second profile (2) are provided separately from one another, wherein the bonding surface (3) of the first profile (1) and / or the bonding surface (3) of the second profile (2) has at least one groove (5), preferably multiple grooves (5), in that adhesive (4) is then applied to the bonding surface (3) of the first profile (1) and / or to the bonding surface (3) of the second profile (2), in that the first profile (1) and the second profile (2) are then pressed together, wherein the adhesive (4) covers the bonding surface (3) of the first and second profiles (1, 2) completely in those regions in which a groove (5) has not been formed and does not cover the bonding surface in those regions in which a groove (5) has been formed.