EP2509847A1

EP2509847A1 - Method for producing a body shell of a motor vehicle and body shell for a motor vehicle

Info

Publication number: EP2509847A1
Application number: EP10776566A
Authority: EP
Inventors: Konrad Eipper
Original assignee: Daimler AG
Current assignee: Mercedes Benz Group AG
Priority date: 2009-12-10
Filing date: 2010-10-26
Publication date: 2012-10-17
Also published as: US8998296B2; JP2013513502A; WO2011069581A1; US20120280534A1; DE102009057734A1

Abstract

The invention relates to a method for producing a body shell of a motor vehicle, in particular a passenger vehicle, in which a support structure assigned to the body shell of the motor vehicle and comprising at least one support part (10, 24, 38) is produced, wherein the support part (10, 24, 38) of the support structure is provided with at least one reinforcing part (22) at least in regions depending on a constructional version of the motor vehicle, and to a body shell for a motor vehicle, in particular a passenger vehicle, with a support structure assigned to the body shell of the motor vehicle and comprising at least one support part (10, 24, 38), wherein the support part (10, 24, 38) can be provided with at least one reinforcing part (22) at least in regions depending on a constructional version of the motor vehicle.

Description

Method for producing a shell of a motor vehicle and shell for a

motor vehicle

The invention relates to a method for producing a shell of a motor vehicle specified in the preamble of claim 1. Art and a shell for a motor vehicle specified in the preamble of claim 9 Art.

DE 10 2005 043 698 A1 discloses a Seitenschweiler a motor vehicle body, with a composite of at least two partial shells box section, which is reinforced in the passenger compartment by a structural part, wherein the structural part is fixedly connected to the box section. The structural part in this case comprises a fiber-reinforced plastic part, which is supported at least on one of the partial shells of the box profile.

In addition, it is known from the series production vehicle construction to adapt car body shells to different load levels by variant formation of the shell. This variant formation undesirably increases the cost of the cars.

It is therefore an object of the present invention to provide a method for producing a shell of a motor vehicle and a shell for a motor vehicle, which allow low cost of the car.

This object is achieved by a method for producing a shell of a

Motor vehicle solved with the features of claim 1 and by a shell for a motor vehicle with the features of claim 9. advantageous

Embodiments with expedient and non-trivial developments of the invention are specified in the dependent claims.

An inventive method for producing a shell of a motor vehicle, in particular a passenger car, in which a the shell of the Motor vehicle associated and at least one support member comprehensive carrier structure is made, characterized in that the support member of the support structure is provided at least partially with at least one reinforcing member depending on a construction variant of the motor vehicle. If the support member provided with the reinforcing member in time after the production of the support structure, this has the advantage that thereby a variant of the bodyshell over different

Construction variants of the motor vehicle away at least significantly reduced, which is accompanied by a reduction in the cost of the shell and thus for the car as a whole.

The inventive method makes it possible, despite different construction variants of the motor vehicle, the shell of which must meet different requirements, to use low on the low cost of the car impacting platforms and at the same time a large range of weights in the accident behavior of the motor vehicle

cover. At the same time a low maintenance or even avoiding different variants of the shell is possible. Likewise, the method according to the invention has the advantage of being able to design the shell or the support structure on that construction variant with the lowest weight of the construction variants of the motor vehicle. Does a construction variant of the motor vehicle on a higher weight and thus requires a stiffened and reinforced shell or a stiffened and reinforced support structure, this is with the or the lowest weight designed shell or support structure possible because that at least one Support member of the support structure is provided with the reinforcing member, wherein the reinforcing member laststufenorientiert, d. H. depending on a load in the event of an accident, is arranged on the support member.

Advantageously, this happens in time after the production of the shell or the support structure.

The said load in the event of an accident is determined, for example, in time prior to the provision of the support member with the reinforcing member or even before the beginning or at least before the end of the production of the support structure or shell, this determination, for example by simulation and / or calculation and / or Trials is performed. Depending on the results thus obtained, the support part with the reinforcement part is finally arranged at corresponding points, in particular points of high loads.

This allows a variant control and thus a cost reduction and a weight reduction in corner types. Furthermore, it avoids the inventive Procedure to interpret the shell on the hardest of the construction variants of the motor vehicle, with even the lightest of the construction variants would have the most difficult of the construction variants designed shell, which would be detrimental to the weight.

The method according to the invention can also be used in the derivation of derivatives such as, for example, a construction variant in the form of a coupe, a convertible, a van, a roadster, other construction variants without a roof or with an openable and closable roof, etc. Especially with a high number of pieces and with many different construction variants, the cost-reducing effect of the method according to the invention has a particularly positive effect.

In the context of the method according to the invention can be provided, for example, node elements of the support structure or the shell with the at least one

Reinforcement part to reinforce. For example, a plurality of such

Provided reinforcing members, which load-oriented on the support member or the support structure, which includes, for example, a plurality of such support members are positioned and arranged. It may, for example, such

Support reinforcement part on the support part.

At this point it should be noted that the carrier part is formed for example from two partial shells, which are connected to each other via respective joining flanges, for example by spot welding and / or gluing or the like, wherein the reinforcing member, for example, on a partial shell, which is formed for example of a metal sheet , supports. Likewise it can be provided that the reinforcing part surrounds the carrier part or such a partial shell at least partially and for example predominantly.

In an advantageous embodiment of the invention, the support member is provided temporally after a coating, painting, in particular a cathodic dip coating or the like with the reinforcing member. If the reinforcing part is formed, for example, from a fiber-reinforced plastic, then this involves this

Associated with the advantage that a plastic matrix of the reinforcing member then by the paint, in particular in the cathodic dip coating,

prevailing heat can be cured. This allows a parallelization of processes, which is associated with a time and thus with a further cost reduction for the process, the shell and the car as a whole. At the said fiber-reinforced plastic may be, for example, a glass fiber reinforced plastic, a carbon fiber reinforced plastic or the like.

In a further advantageous embodiment of the invention, a reinforcing part formed at least substantially of aluminum is provided as the reinforcing part, the reinforcing part then having a very low, specific weight, which benefits a low total weight of the carrier structure and thus of the motor vehicle. This keeps the energy consumption of the motor vehicle for the operation desselbigen low, which in the case of formation of a drive unit as an internal combustion engine low fuel consumption and low C0 ₂ emissions benefit.

It can likewise be provided that a reinforcing part essentially formed of steel is provided as reinforcing part. This is a particularly stiff and stable reinforcement part, by means of which the support structure or the

Carrier part is particularly efficient to reinforce. In the case of training of the

Reinforcement of steel or sheet metal is also given the opportunity to optimize the accident behavior of the support member or the support structure by at least one bead of the reinforcing member. In this context, it should be noted that an embodiment of the reinforcement part as at least substantially one

fiber-reinforced plastic formed reinforcing member is given the opportunity to align fibers of the fiber-reinforced plastic depending on the load and thus adjust the accident behavior of the support member and thus the entire support structure needs.

In the said, at least substantially formed of aluminum

Reinforcing part is, for example, a higher strength

Aluminum material. The said reinforcing part formed at least essentially of steel is, for example, a warm one

formed steel, and at least substantially made of plastic

formed reinforcing member, for example, carbon fiber reinforced plastic patches (CFK patches) are provided.

The at least one reinforcement part is connected to the at least one support part, for example, with conventional connection techniques. For example, the reinforcing member is bonded and / or riveted to the support member. If the carrier part is provided with the reinforcing part in time after said coating, in particular after cathodic dip painting, the connection of the reinforcing part to the carrier part, in particular by gluing technique, offers itself, in particular in a reinforcing part formed at least substantially of fiber-reinforced plastic, and by riveting technology. At the said

Adhesive technology, a provided for connecting the reinforcing member in the support member adhesive can be cured very well by the heat prevailing during the coating, resulting in a further time savings and thus another

Cost reduction possible. In this case, the connection technology is to be matched to the installation location and / or the type and extent of the prevailing load there.

The invention also includes a shell for a motor vehicle, in particular a

Passenger cars, with a shell of the motor vehicle associated and at least one support member comprehensive carrier structure. According to the invention, it is provided that the support part can be provided with at least one reinforcement part at least in regions depending on a construction variant of the motor vehicle, wherein the support part advantageously with the time after the preparation of the support structure

Reinforcement part is foreseeable. Advantageous embodiments of the method according to the invention are to be regarded as advantageous embodiments of the shell of the invention and vice versa.

Also, the shell according to the invention allows a late variant control and at least a reduction of the variant formation of the shell over different construction variants of the motor vehicle away. Thus, an assembly of the reinforcing member according to the invention is provided only after completion of the shell or the support structure and therefore does not have to happen during the manufacture of the shell. This unifies the bodyshell assembly of different construction variants of a motor vehicle significantly, which is associated with a significant reduction in time and costs for the shell and thus for the entire car.

Further advantages, features and details of the invention will become apparent from the following description of several preferred embodiments and from the drawings. The features mentioned above in the description and

Feature combinations on the features mentioned below in the description of the figures and / or on the features shown alone in the figures and feature combinations are not only in the particular combination indicated, but also in others

Combinations or alone, without departing from the scope of the invention.

The drawings show in: 1 shows a detail of a perspective view of a support part of a shell of a passenger car associated support structure, which is provided in regions depending on a construction variant of the passenger car with a reinforcing member;

Fig. 2 is a partial side view of an alternative embodiment of a

Carrier part of FIG. 1; and

3 shows a detail of a perspective view of a further embodiment of a carrier part according to the preceding figures.

Fig. 1 shows a support member in the form of a longitudinal member 10, which consists of a

Half shell 14 and a second half-shell 16 is formed, which are connected via respective joining flanges 18 and 20 with formation of a hollow cross-sectional profile 12 with each other. The half shells 14 and 16 are connected to each other by spot welding on the Fügflansche 18 and 20.

The longitudinal member 10 shown in FIG. 1 is for example a support part of a first support structure of a shell of a passenger car, said support structure comprises, for example, a plurality of such side members 10 and other support members.

The longitudinal member 10 is now dependent on a construction variant of said

Passenger motor vehicle partially provided with a reinforcing member 22, wherein the reinforcing member 22 is formed for example of a fiber-reinforced plastic. The reinforcement of the longitudinal member 10 with the reinforcing member 22 takes place both as a function of the construction variant of the passenger car as well as in terms of time after the production of said support structure or the shell of the passenger car, whereby the possibility is created, the shell load level oriented as a function of the construction variant of Passenger car and thus adapt to different weights of different construction variants. Thus, the different construction variants on the same shell, the same as a function of different requirements, in particular of a representation a good accident behavior of the different construction variants, adapted by appropriate reinforcing parts such as the reinforcing member 22.

This allows a late variant control and avoidance of a

Variation of the shell, which is associated with low costs for the shell and for the entire passenger car.

In this context, it is clear that the reinforcement of the longitudinal member 10 shown in FIG. 1 by the reinforcing member 22 is only an example. In another construction variant, a completely different reinforcement or stiffening by the

Reinforcement 22 may be provided or even eliminated. The training of the

Reinforcement 22, so for example, the material, dimensions, wall thicknesses and / or geometric designs and its local arrangement on the

Side member 10 varies depending on the construction variant and the different loads in an accidental application of force to the support structure or the shell. These different loads in case of accident

Applying force results, for example, from different weights of the different construction variants of the passenger car. These loads are determined, for example, by simulation. Results of this investigation are

For example, highly loaded points of the longitudinal member 10 and the support structure and the shell, to which then correspondingly shaped reinforcing members such as the reinforcing member 22 are arranged.

2 shows a support part in the form of a sill 24, which is also formed from two half-shells 14 and 16, wherein in FIG. 2, only the half-shell 16 is shown. The half-shells 14 and 16 are connected to each other via respective joining flanges 18 and 20 by spot welding.

As can be seen from Fig. 2, the sill 24 in its

Longitudinal direction according to a directional arrow 26 different

Hollow sections on. Thus, it has a larger hollow cross section in the front region 28 than in a rear region 30

Hollow cross sections, in turn, a reinforcing member 22 is provided, which, as already explained in connection with FIG. 1, depending on the construction variant of

Passenger car and the load of the shell or the support structure formed in the event of accidental application of force and on the sill 24th is arranged. Thus, the reinforcing member 22 shown in FIG. 2, for example, the reinforcement of the sill 24 in a construction variant of the passenger car, in which this is designed as a convertible.

The said compensation of the different hollow cross sections in the areas 28 and 30 means that, for example, the hollow cross section in the area 28 allows sufficient rigidity and strength of the sill 24, while the hollow cross section in the area 30 in the formation of the passenger car as a convertible a further improvement in stiffness has, if not otherwise

Arrangements are made. The rigidity of the sill 24 in the region 30 is significantly improved by the reinforcing member 22, so that a low weight having sill 24 in this construction variant by the reinforcement with the reinforcing member 22 has a sufficient rigidity in each case, resulting in a very good accident behavior of Passenger car leads. At this point, it should be noted that the sill 24 may also be part of a support structure of a shell of a passenger car and in particular part of the support structure of the shell of the passenger car mentioned in connection with FIG. 1. In this case, the same applies to the sill 24 according to FIG. 2 with respect to the different construction variants in connection with FIG. 1.

This also applies analogously to a carrier part shown in FIG. 3 in the form of a

Bend carrier 38, which also depends on a construction variant of the

Passenger car is partially reinforced with a reinforcing member 22.

The bending beam 38 has a C-shaped, open cross-sectional profile, which is formed from an upper belt 40, a lower belt 42 and a web 44 connecting the straps 40 and 42. To reinforce the bending beam 38 by means of

Reinforcing member 22, the reinforcing member 22 surrounds the straps 40 and 42 regionally and is arranged on the open side of the C-shaped cross-sectional profile for the area-wise formation of a closed hollow cross-sectional profile. Especially in the region of the reinforcing part 22, the bending beam 28 has a high rigidity and a high strength, which particularly benefits the said accident behavior of the motor vehicle in the event of accidental application of force. The area in which the reinforcement part 22 is arranged is, for example, a medium or a heavily loaded area, which is part of a simulation such an accidental force application and / or is determined in the context of experiments.

It is clear from a combination of FIGS. 1 to 3 that the different construction variants of the passenger car can have the same body shell or the same support structure assigned to the shell, this body shell in FIG

Dependence on the construction variant of the passenger car, in particular in

Dependence on different weights across the different construction variants, on the then occurring load in the event of an accident

Kraftbeaufschlagung can be adjusted. Thus, a later variant formation is possible and a variant of the shell itself avoided, which keeps the cost of the shell and for the entire passenger car in a small frame.

Claims

claims

A method for producing a shell of a motor vehicle, in particular a passenger car, in which a the shell of the motor vehicle

associated and at least one support member (10, 24, 38) comprehensive support structure is produced,

characterized in that

the carrier part (10, 24, 38) of the carrier structure is provided at least in regions with at least one reinforcing part (22) as a function of a construction variant of the motor vehicle.

Method according to claim 1,

characterized in that

the carrier part (10, 24, 38) is provided with the reinforcing part (22) after the production of the carrier structure.

Method according to one of claims 1 or 2,

characterized in that

the carrier part (10, 24, 38) is provided with the reinforcing part (22) in time after a coating, painting, in particular a cathodic dip coating, or the like.

Method according to one of the preceding claims,

characterized in that

a reinforcement part (22) formed at least essentially of a fiber-reinforced plastic is provided as reinforcing part (22).

5. The method according to claim 4 in whose reference back to claim 3,

characterized in that

the reinforcing member (22) at least partially by means of the process for

Coating, painting or the like is cured.

6. The method according to any one of the preceding claims,

characterized in that

a reinforcing part (22) formed at least substantially of aluminum is provided as reinforcement part (22).

7. The method according to any one of the preceding claims,

characterized in that

a reinforcing part (22) formed at least substantially of steel is provided as reinforcing part (22).

8. The method according to any one of the preceding claims,

characterized in that

the reinforcing member (22) is glued and / or riveted to the support member (10, 24, 38).

9. shell for a motor vehicle, in particular a passenger car, with a shell of the motor vehicle associated and at least one support member (10, 24, 38) comprising the support structure,

characterized in that

the carrier part (10, 24, 38) can be provided with at least one reinforcing part (22) at least in regions, depending on a construction variant of the motor vehicle.

10. shell according to claim 9,

characterized in that

the carrier part (10, 24, 38) is providable in time after the production of the carrier structure with the reinforcing part (22).