Method for producing motor vehicle

Abstract

A method for producing a motor vehicle in which the motor vehicle as a vehicle body comprises a metallic platform (1) and a metallic vehicle body (2) placed on the platform (1), in which a metallic main floor (3) is produced and dip-coated separately from the remainder of the vehicle body (1, 2) and then attached to the previously dip-coated platform (1) and / or the previously dip-coated vehicle body (2).

Description

[0001] This application is a divisional application of the invention patent application with the application date of February 22, 2018, application number 201810153742.6, and invention name “Method for Producing Motor Vehicles”. Technical Field

[0002] The invention relates to a method for producing a motor vehicle and to a method for producing a group of motor vehicles. Background Art

[0003] As is known, motor vehicles can be produced in various designs, for example with a monocoque body or with a non-monocoque body which can be constructed on a supporting platform which can also be referred to as a subframe, underframe or chassis.

[0004] A motor vehicle as a so-called "bodyshell" may comprise such a metal platform and a metal body placed on the platform.

[0005] Various drive systems for motor vehicles are also known, such as gasoline drives, electric drives, hybrid drives or drives using alternative fuels such as natural gas, hydrogen and ethanol. These drive systems require different installation spaces in the vehicle structure, in particular in the floor area. Typically, the widely varying energy accumulators of the drive systems are located in this area. Therefore, in the conventional methods for producing motor vehicles, many different body variants are required for the combination of different drive systems, different colors and different vehicle models (such as vans, sedans, etc.), which must be stored in, for example, a storage area (so-called "paint buffer") after painting so that they can be quickly retrieved to produce the required complete vehicle.

[0006] The invention aims to simplify the production of motor vehicles and groups of such motor vehicles having different drive systems. Summary of the invention

[0007] The object of the present invention is to specify a method for producing motor vehicles and groups of vehicles which allows simpler and more cost-effective production of vehicles of different variants, in particular of different drive system variants.

[0008] This object is achieved by a method for producing a motor vehicle, wherein the motor vehicle as a bodyshell comprises a metal platform and a metal body placed on the platform, wherein the metal main floor is produced separately from the rest of the bodyshell and dip-coated and then attached to the previously dip-coated platform and / or the previously dip-coated body.

[0009] According to the invention, a metal primary floor can be produced and dip-coated separately from the rest of the bodyshell, i.e. separately from the platform and separately from the body, which primary floor can be configured for a specific drive system of a motor vehicle. This ready-to-paint primary floor can then be compactly stored or stored for further use together with a previously dip-coated platform and / or previously dip-coated body that has been prefabricated in parallel.

[0010] The invention thus allows the later formation of body variants to be carried out only during assembly. By standardizing the bodyshell or substructures, ie the platform and / or the body, the "paint buffer", ie the storage area for all body variants and paint variants after painting, can be reduced during production. The main floor of a specific drive is only dip-coated and then compactly stacked in the "paint buffer".

[0011] The term "body structure" according to the present invention includes the platform, the main floor and the body parts.

[0012] Preferably, the main floor comprises no attachment, ie no assembled floor, when attached to the rest of the vehicle body.In particular, the main floor may be formed from a single sheet metal component.

[0013] Preferably, the platform and / or the body and / or the main floor are stored at least temporarily after dip coating (and, where applicable, also after surface coating) and before the main floor is fastened to the rest of the bodyshell. The main floor can thus be stored in pre-painted form for further use.

[0014] Preferably, the previously painted main floor panel is attached, in particular bonded and / or bolted, to the platform from above in the installation direction.

[0015] After the main floor is fixed to the platform, preferably body modules (such as side panels, roof modules and / or rear end modules) are attached to the platform to form the body. The support structure for these body modules is preferably made of metal.

[0016] When fastened to the platform, the body module may already be fitted with interior panelling, electrical wiring, carpet and / or handles, for example.

[0017] In a further embodiment of the method, the main floor panel can be attached (in particular bonded and / or bolted) to the (preferably substantially complete) vehicle body from below in the installation direction.

[0018] After securing the main floor to the platform, the complete vehicle body can be placed on the platform and attached to the platform.

[0019] In a method for manufacturing a group of motor vehicles comprising at least one first motor vehicle and one second motor vehicle, the first motor vehicle and the second motor vehicle can be produced as described above, wherein the same main floor is attached to different platforms and / or to different bodies of the first and second motor vehicles. Thus, with the production method according to the invention, the same main floor can be used for different bodies and / or platforms, for example to form vehicles of different types or different colors. Thus, fewer main floors of different designs need to be kept in stock.

[0020] Moreover, for the first and second motor vehicles, different main floors can be attached to an otherwise identical platform and / or the same body of the first and second motor vehicles in order to form a suitable floor for the various drive systems, whereas the same body and / or platform can always be used, which further simplifies inventory control. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is described below by way of examples with reference to the accompanying drawings.

[0022] Figure 1 are illustrations of two embodiments of the method according to the invention.

[0023] Figure 2 is a diagrammatic representation of a first embodiment of the method according to the invention.

[0024] Figure 3 is a diagrammatic representation of a second embodiment of the method according to the invention.

[0025] Figure 4 is a diagrammatic representation of a first embodiment of a main floor and platform for use in the method according to the invention.

[0026] Figure 5 is an illustration of a second embodiment of a main floor and platform for use in the method according to the invention.

[0027] Figure 6 is a schematic cross-sectional view of a first variant for securing the main floor to the platform.

[0028] Figure 7 is a schematic cross-sectional view of a second variant for securing the main floor to the platform. DETAILED DESCRIPTION

[0029] Figure 1-7 The method according to the invention for producing a motor vehicle, in particular for producing a plurality of motor vehicles in a production plant, is shown in two main embodiments, variant 1 and variant 2. With these production methods, it is possible to supplement a standard platform and / or body with a specific drive main floor during assembly.

[0030] Figure 1A diagram showing two main embodiments of the method according to the invention is shown, namely variant 1, V1, at the top of the figure and variant 2, V2, at the bottom. Figure 2 is shown in more detail in , and variant V2 is Figure 3 is shown in more detail in .

[0031] In variant V1, see for example Figure 2 , a standard platform 1 is produced in the body production workshop R; in parallel, the main floor 3 of the specific drive of the body 2 and the body modules 4, 5, 6 of the specific model, such as the side panels 4, the roof 5 and the rear end 6, are produced.

[0032] These components are then dip-coated in a paint shop L, and preferably the vehicle-specific upper body structural components (i.e. the vehicle body modules 4, 5, 6) are also surface-coated in the desired vehicle body color. It is also possible that only the supporting structure of at least one of these vehicle-specific body modules 4, 5, 6 is made of metal and only dip-coating is preferred, while further exterior panels or visible elements attached thereto (i.e. parts of the arrangement of the vehicle-specific body module, such as panels, trims, covers, composite panels, etc.) are surface-coated. If these are not made of metal, but, for example, of plastic, dip-coating can be omitted.

[0033] All components, ie the main floor 3, the platform 1 and the car bodies 2 or their modules 4, 5, 6, are stored in a "paint buffer" P, such as a car body warehouse for storing car bodies 2 and body modules, ready for retrieval.

[0034] The components can be stacked compactly. In particular, only a few standard platforms 1 need to be stored. Moreover, the vehicle-specific upper body structure components 4, 5, 6 require little space, because preferably they have not yet been welded to form a bulky vehicle body. Therefore, many color variants can be realized in a simple manner. After retrieving the vehicle-specific and drive-specific components, the drive-specific floor component (i.e. the main floor 3) is joined to the standard platform 1 from above or from below. Thereafter, the now drive-specific platform 1 including the main floor 3 is equipped with electrical devices, chassis, drive system and similar equipment. In parallel, the vehicle-specific upper body structure components (i.e. the body modules 4, 5, 6) are assembled, if not already assembled.

[0035] In the assembly station M, in particular the "frame assembly station", these components 1, 2, 3 are joined to form the complete vehicle. The vehicle model variant is thus formed very late. This advantageously enables a short main assembly line with optimal accessibility and a transfer of production content to a pre-assembly line, which results in production time advantages.

[0036] The drive-specific floor assembly, ie the main floor 3 adapted to different drive types (such as internal combustion engine, electric motor, hybrid drive, etc.), can also be configured differently in other aspects, such as Figure 4 and Figure 5 The main floor 3 may include, for example, the area of ​​the rear seat support 11 ( Figure 5 ) or the area not including the rear seat bracket 11 ( Figure 4 The platform 1 can also be correspondingly prepared for receiving a main floor with or without a rear seat support 11 and thus in particular be equipped itself without or with a rear seat support 11 ( Figure 4 and Figure 5 Advantageously, when the rear seat support area is included in the main floor 3, the seat geometry (i.e. seat height, fore-aft distance of all passengers, position in the longitudinal and transverse direction of the vehicle) and the geometry of the energy accumulator can be adapted with low tolerances to a single component, i.e. the main floor 3.

[0037] The standard platform 1 and the specific (drive) main floor 3 (e.g. individual floor panels) are preferably dip-coated separately in parallel. In addition, components of the body upper structure 2 (such as side modules 4, roof module 5, rear end module 6) are also painted, surface-coated in any case, and in the case of metal parts, preferably further dip-coated.

[0038] In the actual vehicle assembly station M, a suitable (drive-specific) floor assembly 3 for the respective vehicle model is installed from below in the standard platform 1 in the installation direction X, see Figure 7 , and are preferably attached by bonding with adhesive 7 and optionally also by bolted connection means 8. Alternatively, the main floor 3 can also be installed in the platform 1 from above.

[0039] Alternatively, the upper body structure components 4, 5, 6 can also be preassembled before installation on the standard platform 1 and include, for example, interior paneling, wiring, carpeting, handles, etc. Such variants usually lead to even later variant formation in the production process, since the (body) structures are only joined later in the vehicle assembly process, i.e. the variants of van, sedan, coupe, etc. are only formed later in the production process.

[0040] In variant 2, V2 of the invention (see also Figure 3 ), in the bodywork production workshop R, the standard body 2 of the vehicle model is produced without a floor assembly, that is, without a main floor 3. The main floor 3 is produced in parallel as a specific drive assembly.

[0041] The standard body 2 and the main floor 3 of the specific drive are then dipped in a paint shop L and the body 2 is also surface coated.

[0042] In the "paint buffer" P, car bodies 2 of various colors are stored. Floor assemblies 3 are also compactly stored there.

[0043] After being retrieved from the storage area, the standard vehicle body 2 is assembled with the drive-specific main floor 3 in the assembly station M, wherein the main floor 3 is preferably engaged from below in the installation direction X (see Figure 7 ), and then passed through conventional further assembly processes.

[0044] Due to the standardization of the bodies 2, a considerable amount of space can be saved in the storage area of ​​the "paint buffer" P, since only the various colors need to be kept in stock, instead of all the different drive-specific bodies for each of all the colors. This production method can also be implemented in parallel with the conventional production method and in a mixed mode. This creates the possibility of producing additional variants of the vehicle in a simple manner.

[0045] like Figure 6 and 7 As shown, in assembly station M, mounting adhesive 7 is provided as joining technology for variants V1 and V2 and preferably additional bolted connection means 8 are provided which help to secure the adhesive 7 to reinforce and increase the rigidity and strength of the vehicle body.

[0046] Figure 6 and Figure 7 Each shows a section of a manufactured vehicle, namely in the region of the seat cross member 9 (bottom) and outside the seat cross member 9 (top). The mounting direction X is indicated each time by an arrow and is Figure 6 Extending from the top and Figure 7 Extends from the bottom.

[0047] In order to avoid blocking points and thus collisions during joining, they can be bridged after joining with assembly parts such as fixing brackets 10. For example, the seat cross member 9 can be connected to the bottom frame beam of the platform 1 by means of brackets, in particular by means of fixing brackets 10, so as to form a continuous load path.

[0048] Standard vehicle bodies 2 are dip-coated (cathodic dip coating, CDC) and surface-coated (corresponding to the desired vehicle color) and kept in stock (see Figure 3 , middle figure, P). The specific (drive) floor components, i.e. the main floor 3, are not yet assembled, but they are still different from each other insofar as they are constructed differently according to the various individual vehicle variants, which are preferably dipped in parallel / separately and kept in stock (see Figure 3, middle figure). Since in this way (only) a standard vehicle body 2 in various colors needs to be stored as a consistent vehicle body, instead of a plurality of vehicle body variants as is usually the case in the prior art, this method offers the advantage of reducing the vehicle body storage area.

[0049] In the actual vehicle assembly station M, a specific main floor 3 adapted to the respective vehicle model is preferably installed in the standard vehicle body 2 from below and preferably fixed by bonding with an adhesive 7 (see Figure 7 ). The main floor can then be further assembled.

[0050] The solution can also be applied on conventional assembly lines, or existing assembly lines can remain unchanged, since the essential difference / advantage lies in the actual body storage or in the reduction of the diversity of actual body variants.

[0051] Reference numerals list

[0052] 1 Platform

[0053] 2 Body

[0054] 3 Main Floor

[0055] 4 Side panel modules

[0056] 5Roof module

[0057] 6 Backend module

[0058] 7. Adhesives

[0059] 8 Bolted connection device

[0060] 9 Seat cross member

[0061] 10Fixed bracket

[0062] 11 Rear seat support

[0063] V1 Variant 1

[0064] V2 Variant 2

[0065] R Car body production workshop

[0066] L Paint Shop

[0067] P Paint Buffer

[0068] M Assembly Station

Claims

1. A method for producing a motor vehicle, wherein the motor vehicle as a body comprises a metal platform (1) as a subframe and a metal body (2) placed on the platform (1), It is characterized by: The metal main floor (3) is produced separately from the rest of the vehicle body (1, 2) and dip-coated, the dip-coated main floor is then stored in a storage area, the dip-coated main floor is retrieved from the storage area and then attached to the previously dip-coated platform (1) and / or the previously dip-coated vehicle body (2), wherein the metal main floor (3), the metal platform (1) and the metal body (2) are produced and dip-coated separately, and the metal main floor (3) is stored after being dip-coated and before being fixed to the rest of the body (1, 2), When attached to the rest of the vehicle body (1, 2), the main floor (3) includes no attachment, ie is not assembled.

2. The method according to claim 1, It is characterized in that The platform (1) and / or the vehicle body (2) and / or the main floor (3) are stored after dipping and before the main floor (3) is fastened to the rest of the vehicle body shell (1, 2).

3. The method according to claim 1, It is characterized by: The main floor (3) is attached to the platform (1) from above in the installation direction, in particular is bonded and / or bolted to the platform (1).

4. The method according to claim 3, It is characterized by: After the main floor (3) is fixed to the platform (1), body modules (4, 5, 6), such as side modules (4), roof modules (5) and / or rear end modules (6), are attached to the platform (1) to form the body (2).

5. The method according to claim 4, It is characterized by: When fastened to the platform (1), the body modules (4, 5, 6) are already fitted with, for example, interior panelling, electrical wiring, carpet and / or handles.

6. The method according to claim 1, It is characterized by: The main floor (3) is attached to the vehicle body (2) from below in an installation direction, in particular is bonded and / or bolted to the vehicle body (2).

7. The method according to claim 6, It is characterized by: After fixing the main floor (3), the vehicle body (2) is placed on the platform (1).

8. A method for producing a group of motor vehicles, the group of motor vehicles comprising at least one first motor vehicle and one second motor vehicle, wherein: The first motor vehicle and the second motor vehicle are produced according to claim 1 , wherein the same main floor ( 3 ) is attached to different platforms ( 1 ) and / or different bodies ( 2 ) of the first motor vehicle and the second motor vehicle.

9. A method for producing a group of motor vehicles, the group of motor vehicles comprising at least one first motor vehicle and one second motor vehicle, wherein: The first motor vehicle and the second motor vehicle are produced according to claim 1 , wherein different main floors ( 3 ) are attached to the same platform ( 1 ) and / or the same body ( 2 ) of the first motor vehicle and the second motor vehicle.

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