Method for producing a motor vehicle body and flange masking for use

Abstract

The invention relates to a method for producing a motor vehicle body (2), wherein in a first step, module elements (4, 6, 8, 10, 12) are produced, in a second step, a flange mask (18) is arranged on adhesive joining surfaces (22) of a respective module element (6), in a third step, a cathodic dip coating of the module elements (4, 6, 8, 10, 12) is carried out, in a fourth step, the flange mask (18) is removed, and in a fifth step, the module elements are at least materially bonded to one another, wherein in the second step, the flange mask (18) is arranged on the corresponding module element (6) by means of a detachable, force-fitting connection. The invention further relates to a flange mask (18) for use in such a method.

Description

The invention relates to a method for producing a motor vehicle body, wherein in a first step module elements are produced, in a second step flange masking is arranged on adhesive joining surfaces of a relevant module element, in a third step cathodic dip coating of the module elements is carried out, in a fourth step flange masking is removed, and in a fifth step the module elements are at least integrally bonded to one another. The invention further relates to a flange masking for use in such a method.Such a method for producing a motor vehicle body is sufficiently known from the prior art. An example of this is DE 10 2010 060 700 A1. Individual modular elements are prefabricated in this case in order to then be coated subsequently in a dip coating process. In order that the module elements can subsequently be connected in a materially bonded manner, it is known to remove the so-called CTL material from the corresponding regions of the module elements again or to cover these regions during the dip-coating process by an adhesively bonded flange masking. An example of this is German laid-open specification DE 10 2018 210 215 A1. However, removing the flange masking is complicated and therefore expensive in mass production use.It is therefore an object of the invention to provide a method for producing a motor vehicle body which avoids the abovementioned disadvantage in a simple and cost-effective manner.This object is achieved according to the invention in that the flange masking in the second step is arranged on the corresponding module element by means of a releasable, force-fit connection. As a result, the flange masks can be changed in a simple manner in the mass production process and, if appropriate, can be reused directly after cleaning.In a particularly advantageous manner, the flange masking is arranged on casting interfaces in the second step. Removal of the CTL material would be particularly complicated here.In a particularly advantageous embodiment, in the second step, the releasable, force-fit connection is produced by a clamping and / or screw connection. A force-locking connection formed in this way can be released particularly quickly in mass production use.Because the cathodic dip coating is carried out in a closed coating capsule in the third step, the assembly process can be carried out even more compactly and efficiently. In addition, such a paint capsule is particularly suitable for painting modular elements.The object is also achieved by a flange masking for use in such a method, wherein the flange masking comprises a polymer coating. This can effectively prevent a presumed adhesion of CTL material.In this case, the flange masking can advantageously have a circumferential sealing contour.The invention is explained in more detail with reference to a drawing, in which: FIG. 1 is a perspective view of a motor vehicle body; and FIG. 2 is an exploded view of a module element with an associated flange masking.FIG. 1 shows a perspective view of a vehicle body 2 with module elements 4, 6, 8, 10 and 12, The module element 6 can also be referred to here as a main module, which has the A columns 14 and 16 and on which the module elements 4, 8 and 10 are arranged.FIG. 2 now shows an exploded view of the main module 6 with an associated flange masking 18 which is not yet arranged. The flange masking 18 in the present exemplary embodiment has a circumferential sealing contour 20 which ensures a sealed contact with the main module 6. In addition, the flange masking 18 has a polymer coating which prevents adhesion of CTL material. The flange masking 18 is intended to cover adhesive joining surfaces 22 of the main module 6 during cathodic dip coating in order to be able to connect the module 4 to the main module 6 in a materially bonded manner in a simple manner and without complicated subsequent processing in a subsequent assembly step. For this purpose, the flange masking 18 can be arranged on casting interfaces 24 by means of clamping jaws 26, 28 on the main module 6, in particular, in order to produce a releasable, force-fit connection.A method according to the invention for producing the motor vehicle body 2 can now be described as follows: In a first step, the module elements 4, 6, 8, 10, 12 are produced. In a second step, flange masks 18 are provided on adhesive joining surfaces 22 and in this case in particular on casting interfaces 24 of a respective module element. By way of example, the flange masking 18 is arranged here on adhesive joining surfaces 22 of the main module 6 by means of clamping jaws 26, 28. In a third step, dip coating of the module elements 4, 6, 8, 10, 12 is carried out in a coating capsule known per se. In a fourth step, the flange masks, in this case the flange mask 18, are then removed. In a fifth step, the module elements 4, 6, 8, 10, 12 can then be connected to one another in a materially integral manner, here glued.

Claims

Method for producing a motor vehicle body (2), wherein in a first step module elements (4, 6, 8, 10, 12) are produced, in a second step flange masking (18) is arranged on adhesive joining surfaces (22) of a relevant module element (6), in a third step cathodic dip coating of the module elements (4, 6, 8, 10, 12) is carried out, in a fourth step the flange masking (18) is removed, in a fifth step the module elements are at least integrally connected to one another, characterized in that in the second step the flange masking (18) is arranged on the corresponding module element (6) by means of a releasable, force-fit connection.Method for producing a motor vehicle body according to Claim 1, characterized in that the flange masking (18) is arranged on casting interfaces (24) in the second step.Method for producing a motor vehicle body according to Claim 1 or 2, characterized in that, in the second step, the releasable, force-locking connection is produced by a clamping and / or screw connection (26, 28).Method for producing a motor vehicle body according to one of the preceding claims, characterized in that, in the third step, the cathodic dip coating is carried out in a closed coating capsule.Flange masking for use in a method according to any of the preceding claims, characterized in that the flange masking (18) comprises a polymer coating.Flange masking according to Claim 5, characterized in that the flange masking (18) has a circumferential sealing contour (20).

Images