DE102022111887A1 - Vehicle rim and method for producing such a vehicle rim - Google Patents

Abstract

The invention relates to a method for producing a vehicle rim (1) with at least one tire seat (17) onto which a tire bead (15) of a tire (3) can be mounted, wherein in a painting process a rim base body (19) has at least one lacquer layer (21 ) is covered. According to the invention, the painting process is followed by a post-treatment process in which at least the tire seat (17) is surface-treated to achieve a predefined surface quality.

Description

The invention relates to a method for producing a vehicle rim according to the preamble of claim 1 and a vehicle rim according to claim 10.

Vehicle rims can be painted in a variety of colors in one painting process. Due to the different colors and the associated paint system structures, there is a high degree of variation in the surface quality of the rims resulting from the painting process. The spread is further increased by the variance of the various painting systems in use.

In a generic method, a rim base body is coated with at least one layer of paint in a painting process. Due to the strong dispersion of the surface qualities of rims treated in this way as described above, the painted surfaces of the vehicle rims can have excessive roughness, for example due to painting errors. This can lead to problems with tire installation, especially on the tire seat of the vehicle rims.

From the DE 2 130 261 A an arrangement consisting of a tire and a wheel is known.

The object of the invention is to provide a vehicle rim and a method for producing such a vehicle rim, in which problems with tire assembly can be prevented in a simple manner compared to the prior art.

The task is solved by the features of claim 1 or 10. Preferred developments of the invention are disclosed in the subclaims.

The invention is based on a method for producing a vehicle rim with a tire seat onto which a tire bead of a tubeless tire can be mounted. In a painting process, a rim base body is coated with at least one layer of paint to form the vehicle rim. According to the characterizing part of claim 1, the painting process is followed by a post-treatment process. In the post-treatment process, in order to achieve a predefined surface quality, at least the tire seat is treated by surface treatment, in particular by polishing and/or grinding. Grinding and/or polishing can remove or smooth paint defects, particularly roughness peaks in the paint layer. Alternatively, the surface of the tire seat can also be roughened. In particular, the post-treatment step can achieve a clearly defined surface quality or roughness in the tire seat and, if necessary, in the entire rim area on the outside of the wheel.

In contrast to the invention, the excessively rough lacquer layer can be smoothed using an additional smoothing lacquer layer. Such an additional smoothing layer of paint is carried out in the form of a full-surface painting or a controlled partial painting of the rim area. In contrast, the aftertreatment process according to the invention is much easier to carry out in terms of production technology and can therefore be implemented more cost-effectively.

The production of the predefined surface quality or roughness in the rim area, especially in the tire seat, can be carried out automatically as a single-stage or multi-stage process in a polishing/grinding station. In the polishing/grinding station, at least one rotating polishing/grinding element can polish or grind at least the tire seat of the vehicle rim in the circumferential direction of the rim. In the aftertreatment process, at least the tire seat is continuously polished or ground in the circumferential direction of the rim.

Viewed in cross section, the vehicle rim has a rim base which lies centrally between lateral rim flanges that are raised radially outwards. Viewed in the axial direction of the rim, the rim base can merge into a rim shoulder on both sides, to which the respective rim flange is connected. With this rim geometry, the tire seat is formed by an inner corner area between the rim flange and the rim shoulder.

The tire seat is divided in the vehicle transverse direction into a vehicle-inside tire seat, onto which a vehicle-inside tire bead of the tire can be mounted, and a vehicle-outside tire seat, onto which a vehicle-outside tire bead of the tire can be mounted. At a transverse distance from the respective rim flange, an elevation or a hump can be formed in the rim shoulder that runs around the rim. This counteracts the tire bead from being pressed into the rim well. In the aftertreatment process, at least the inner corner area forming the tire seat between the respective rim flange and the respective rim shoulder is treated up to the circumferential elevation (hump).

An exemplary embodiment of the invention is described below with reference to the attached figures.

• 1 in einer vergrößerten Teilschnittdarstellung eine Fahrzeugfelge mit darauf montiertem Reifen;
• 2 bis 4 jeweils Ansichten, anhand derer Prozessschritte zur Herstellung der Fahrzeugfelge veranschaulicht sind.

Show it:

• 1 in an enlarged partial sectional view of a vehicle rim with a tire mounted on it;
• 2 until 4 each shows views that illustrate the process steps for producing the vehicle rim.

In the 1 a completed vehicle rim 1 is shown with a tubeless tire 3 mounted thereon. The vehicle rim 1 has a rim bed 5 on the outer circumference, which lies centrally between lateral rim flanges 7, 9 which are raised radially outwards. An example of this is in the 1 Rim flange 7 shown on the left edge of the picture is on the inside of the vehicle, while that in the 1 The rim flange 9 shown on the right edge of the picture is on the outside of the vehicle. The middle rim base 5 merges into a rim shoulder 11 on both sides, to which the respective rim flange 7, 9 is connected. With transverse distance a ( 1 ) to the respective rim flange 7, 9, an elevation 13 (hump) running around the rim 1 is formed in both rim shoulders 11, which counteracts the pressing of a tire bead 15 of the tire 3 into the rim well 5.

On each side of the rim, an inner corner area 17 between the rim flange 7, 9 and the rim shoulder 11 forms a tire seat on which the vehicle-inside tire bead 15 and the vehicle-outside tire bead 15 of the tire 3 sit. The tire seat 17 extends on both sides in the direction of the rim well 5 up to the circumferential elevation 13 (hump).

In the 1 the vehicle rim 1 has a rim base body 19 which is covered with a layer of lacquer 21. The rim base body 19 can be made of a light metal, for example aluminum, while the lacquer layer 21 is applied to the rim base body 19 in a painting process. The paint surface of the vehicle rim 1 may have excessive roughness, for example due to paint defects. Such excessive roughness can lead to problems when mounting the tire, especially on the tire seat 17.

Against this background, according to the invention, the paint surface on the vehicle's inner tire seat 17 and on the vehicle's outer tire seat 17 is surface-treated by polishing and/or grinding in order to achieve a predefined surface quality or surface roughness of the smile layer 21.

In a process for producing the vehicle rim 1, the one in the 2 shown rim base body 19 provided. This is done in a painting process ( 3 ) covered with the lacquer layer 21. This is followed by a post-treatment process ( 4 ), in which a surface treatment of the painted surface of the vehicle rim 1 is carried out. The aim of this surface treatment is to give at least the tire seat 17 a predefined surface quality/roughness by polishing and/or grinding in order to avoid problems during tire assembly.

In the 4 the not yet surface-treated, painted vehicle rim 1 is transferred to a polishing/grinding station 23. In the polishing/grinding station 23, the post-treatment process is carried out automatically as a single-stage or multi-stage process. The polishing/grinding station 23 points in the 4 Both outside and inside of the vehicle have a rotating polishing/grinding element 25, which polishes/grinds the tire seat 17 inside/outside the vehicle. For this purpose, each of the polishing/grinding elements 25 is automatically guided around the vehicle rim 1 in the circumferential direction of the rim, so that the tire seat 17 consistently receives the predefined surface quality in the circumferential direction of the rim.

REFERENCE SYMBOL LIST:

1

vehicle rim

3

Tires

5

rim bed

7

vehicle interior rim flange

9

vehicle exterior rim flange

11

Rim shoulder

13

increase

15

tire bead

17

Tire seat

19

rim base body

21

varnish layer

23

Polishing/grinding station

25

Polishing/grinding element

a

Transverse distance

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 2130261 A [0004]

Claims (10)

Method for producing a vehicle rim (1) with at least one tire seat (17) onto which a tire bead (15) of a tire (3) can be mounted, a rim base body (19) being coated with at least one lacquer layer (21) in a painting process, characterized in that the painting process is followed by a post-treatment process in which at least the tire seat (17) is surface-treated to achieve a predefined surface quality. Procedure according to Claim 1 , characterized in that the tire seat (17) is smoothed or roughened during the surface treatment, and/or that the surface treatment is carried out by grinding. Procedure according to Claim 1 or 2 , characterized in that during the surface treatment, paint defects, in particular roughness peaks of the paint layer (21), are removed or smoothed. Procedure according to Claim 1 , 2 or 3 , characterized in that the vehicle rim (1), viewed in cross section, has a rim base (5) which lies centrally between lateral rim flanges (7, 9) which are raised radially outwards, and that in particular the rim base (5) is in one on both sides Rim shoulder (11), to which the respective rim flange (7, 9) is connected, and that in particular the tire seat (17) is an inner corner area between the rim flange (7, 9) and the rim shoulder (11). Procedure according to Claim 4 , characterized in that in the rim shoulder (11) an elevation (13) or a hump is formed around the rim (1), which is spaced at a transverse distance (a) from the rim flange (7, 9), and that the elevation (13) counteracts the pressing of the tire bead (15) into the rim base (5). Method according to one of the preceding claims, characterized in that the entire outer circumference of the rim is treated in the post-treatment process, in particular the rim well (5), the rim shoulder (11), the hump (17) and the rim flanges (7, 9). Method according to one of the preceding claims, characterized in that at least the tire seat (17) is continuously polished or ground in the circumferential direction of the rim. Procedure according to one of the Claims 4 until 7 , characterized in that in the aftertreatment process at least the inner neck area forming the tire seat (17) between the respective rim flange (7, 9) and the respective rim shoulder (11) is treated up to the circumferential elevation (13). Method according to one of the preceding claims, characterized in that the post-treatment process is carried out automatically as a single-stage or multi-stage process in a polishing/grinding station (23), in which at least one rotating polishing/grinding element (25) in the circumferential direction of the rim is at least Tire seat (17) polished or ground. Vehicle rim, which is produced in a method according to one of the preceding claims, wherein the vehicle rim (1) has a tire seat (17) onto which a tire bead (15) of a tire (3) can be mounted, and wherein the vehicle rim (1) has a Rim base body (19) which is covered with at least one lacquer layer (21), characterized in that the lacquer layer (21) is surface-treated at least in the area of the tire seat (17) to a predefined surface quality.

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