DE102007060963B3 - Axle component i.e. slender tension-/compression bar, manufacturing method for motor vehicle, involves bending side around specific degrees, bending another side, so that sides directly face each other, and inserting bearings into retainers - Google Patents

Abstract

The method involves cutting a metallic plate, and punching the plate in an area of bearing retainers (4, 5). A back bar (11) arranged in a centre of the plate is drawn. A punched wall side (6) is bent around 90 degrees opposite to the bar. A set of passages (12, 14) is produced at holes of the side. Another punched wall side (7) is bent, so that the sides directly face each other. Passages (13, 15) are produced at the holes of the latter side. The passages (12, 14) are calibrated during production of the passages (13, 15). Rubber-metal-bearings are inserted into the retainers.

Description

The The invention relates to a method for producing an axle component with the features of claim 1.

axle components in the form of tension / compression rods come as tie rods, handlebars or coupling rods used. turnbuckles are part of the steering linkage and serve for transmission the steering forces and movements on the rotatably or pivotally mounted wheel receivers a vehicle axle. While a driving movement of the motor vehicle are ground forces on the Wheel, the wheel bearings and the tie rods in the steering system of a Motor vehicle initiated. This can be done, for example, in succession from imbalances on the wheel to adverse vibration effects. For this reason, the connection of the tie rods in the steering linkage via rubber-metal bearings.

suspension arm have the function to fix the wheel kinematically and have a significant influence on the steering characteristics. Suspension arm with separately welded pipe sections, in which the rubber-metal bearings are pressed, put one Preceded by a series of manufacturing steps and additional components, so the effort for such Stock picking is relatively high.

From the EP 0 479 598 A2 For example, a handlebar is known, which is connected to each other in sheet metal construction of two half-shells, which are clamped together at their edge sides. There are also single-handlebars are known in which a metal profile is formed U-shaped. Ie. the longitudinal profile of the pull / push rod is formed by a one-piece, U-shaped configured press shell whose middle web is penetrated by the two bearing receptacles and wherein the edges of the central web are folded in the same direction, so that the U-shaped Profile arises. The end pieces of the bends will be changed over again to clasp the other sheet metal shell.

From the DE 10 2006 028 713 B3 a method for producing a cross-sectionally U-shaped arm made of sheet metal for a car multi-link axle is known, in which a sheet metal shell is formed as a molded part of two mirror-image mutually arranged part shells. At the two ends of the sheet metal shells bearing eyes are provided, which are each formed by a pair of aligned holes in the subshells. To produce a metal sheet is first cut and bent with respect to a first wall side in the desired shape. Subsequently, the perforation of the first wall side takes place in the region of the bearing eye. After the subsequent bending of the second wall side, the perforation of the second wall side takes place in the region of the bearing eye.

From the EP 1 370 431 B1 a structural element for a vehicle wheel suspension and a method for their preparation is known. It is proposed to punch the first leg of the later U-profile before bending, so that the two legs connecting back arises and both legs are parallel to each other. In this embodiment of the triangular design of the handlebar, the holes that are to be aligned, before bending are at a relatively large distance from each other, so that high demands are placed on the bending accuracy. It can therefore be difficult with increasing distance to align the holes exactly to each other. On the other hand, a perforation of a sheet still formed, in particular in the form of a flat metal plate, with simpler tools is possible, as the perforation of an already formed board.

Of these, Based on the object of the invention, an improved Method for producing an axle component in the form of a slim Pull / push rod show with two end bearing recordings.

These Task is by the manufacturing method according to claim 1 solved.

The Achskomponente invention in the form of a pull / push rod has a longitudinal profile of sheet metal, which each has a bearing receptacle at its two ends. The longitudinal profile is a one-piece, U-shaped configured pressing shell. The press shell has a first wall side on, which is interspersed by the bearing shots and one of the first Opposite wall side, also from Lageraufnahmen interspersed second wall side. The bearing shots aligned. The wall sides are angled away from the wall sides rear web one piece connected with each other. This results in that the axle component according to the invention to a side edge, namely on the spine opposite Edge side, open. Although it is from the basic cross section to a U-shaped configured pressing member is the orientation of the U-shape at 90 ° to the known, deep drawn from sheet metal coupling rods rotated. This is a weight saving compared to a model in which the U-shape points in the direction of the central axes of the bearing receptacles, can be reduced by approx. 40%, with the distance between the bearing mounts remaining constant.

As a material for such Achskomponenten is preferably a higher-strength steel, in particular a ferrite-bainite dual-phase steel, for Use, which behaves strong cold strengthening in the forming process. The wall thickness of the metal sheet is dependent on the mechanical requirements of the respective axis component and is preferably in a range of 1.6 to 2.2 mm, in particular in a range between 1.8 and 2.0 mm.

The Wall sides of the longitudinal profile preferably run parallel to each other, d. H. they have in their vast Areas a constant distance. This is not excluded that the wall sides have embossings or exhibitions in certain areas can, whereby the fundamental parallelism However, the wall pages is not affected.

The Orientation of the U-shaped press shell allows it, the longitudinal profile to be relatively narrow in an area between the bearing receptacles. D. h., That one across the spine measured width of the wall sides in the area between the bearing receivers solely for weight reasons in principle smaller than in the area of the bearing receptacles. Preferably the width in the middle between the bearing shots greater than in the off-center Areas between the bearing receivers. This elevation in the middle area serves for setting a defined buckling resistance under pressure loads. Preferably, the width of the off-center areas increases to middle areas continuously too. The increase in width can be on both sides take place, d. H. both in the region of the longitudinal edge, which has the spine, as well as on the open, mouth-side longitudinal edge. In a preferred embodiment only the backrest side longitudinal edge arched on the sides of the wall, while the opposite longitudinal edge is straight, d. H. substantially parallel to the central axis of the longitudinal profile runs.

Of the rear web extending between the first wall side and the second wall side preferably from the vertical center axis of the first bearing receptacle up to the vertical center axis of the second bearing seat or beyond. in principle can the spine in contrast to previously known constructions also have a length, which are over extends the boundary contour of the component addition. This will be a further increase the component strength possible.

The Bearing mounts are used to hold rubber-metal bearings, the due to the U-shaped Configuration of the press shell in two opposite, d. H. arranged in alignment, bearing receptacles are held. The Bearing receptacles themselves are formed by each outwardly facing passages. Ie. the passages are exposed from the inside of the axle component to the outside. Preferably own the passages an almost right-angled offset from the respective longitudinal wall, d. H. They have very tight bending radii. The inner radius is preferably in a range of less than 0.4 mm and is for example 0.2 mm.

The Achskomponente invention is particularly lightweight and preferably comes as a victim part used, d. H. in case of overload the chassis or the supporting axle components should be, for example First, deform the tie rod to avoid damage to more expensive or difficult to avoid to be replaced chassis parts. The invention comes therefore especially for slim tie rods for carrying.

One embodiment the axle component according to the invention and a method for producing such an axle component will be explained below with reference to the schematic drawings. It demonstrate:

1 and 2 an axle component in the form of a tie rod in two different perspective views;

3 the axis component of 1 in a side view;

4 the axle components of the 1 to 3 in a further perspective view and

5 to 10 The manufacturing sequence for manufacturing an axle component in five steps.

The in the 1 to 4 illustrated axle component 1 is a slim tie rod, however, without representation of the rubber-metal bearings, since it is not in the invention on the design of the rubber-metal bearings, but on the design of the load-bearing longitudinal profile of the axle component 1 arrives. The longitudinal profile of the axle component 1 consists of formed sheet metal. The axle component is a one-piece, U-shaped configured press shell. One-piece means in this context that the press shell has not been brought into the final contour by cohesive bonding techniques, but exclusively by forming process.

Based on 1 and 2 It can be seen that the longitudinal profile at both ends 2 . 3 each circular bearing shots 4 . 5 has, in which rubber-metal bearings can be pressed. The diameter of the bearing mounts 4 . 5 is much larger than the width B of the respective wall sides 6 . 7 ,

The wall sides 6 . 7 extend in this embodiment over their entire longitudinal extent parallel to each other. The width B of the wall sides 6 . 7 takes to the middle M between the bearing shots 4 . 5 There is something in the way and therefore in the off-center areas 8th . 9 between the storage shots 4 . 5 slightly smaller, with the width B about halfway between the center M and the respective bearing support 4 . 5 is lowest. Starting from these narrow points, the width increases continuously in the direction of the respective bearing support 4 . 5 towards, wherein the width B of the longitudinal profile increases by a factor ≥ 3.

As based on the 3 and 4 can be seen, the width increase takes place in this embodiment in the area between the bearing receivers 4 . 5 exclusively in the area of that longitudinal edge 10 , on which a spine 11 the two wall sides 6 . 7 connects with each other. Based on 3 it can be seen that the spine 11 up to the in 3 drawn straight lines G1 and G2, which are the centers of the respective bearing mounts 4 . 5 to cut. Basically, the back bar 11 in contrast to previously known concepts but also be designed longer and on the vertical center axes of the bearing mounts 4 respectively. 5 extend.

The bridge on the bridge 11 runs at right angles to the sides of the wall 6 . 7 as based on the 4 can be seen. Out 4 it also becomes clear that the bearing mounts 4 . 5 from pointing in opposite directions and outwardly directed passages 12 . 13 . 14 . 15 are formed.

The back web side longitudinal edge 10 the wall sides is arched, while the opposite longitudinal edge 16 straight is ( 3 ).

The preparation of such an axle component is described below with reference to 5 to 10 described.

To produce a previously described axle component in the form of a slender, elongated pull / push rod, the cutting of a metal sheet is first of all 18 or a metal plate in the desired shape required. The next cut will be the metal sheet 18 in the area of later bearing receptacles in the area of its ends ( 4 ). The distance of the holes 17 from the later spine is very low, so the holes 17 without major difficulties in bending the metal sheet 18 can be covered. In addition, it is readily possible by the subsequent production of the passages, parallelism of the opposite holes 17 sure. A punching of the metal sheet 18 before a subsequent forming is possible with much simpler tools than already formed metal plates. As a result, such slim pull / push rods with only two bearing mounts at their ends even with a cross-sectionally U-shaped design can be particularly easily and inexpensively.

In the next step, a backrest is made by deep drawing 11 trained in 6 can be seen as a central, trapezoidal protuberance. Subsequently, a first perforated wall side 6 at 90 ° to the spine 11 angled ( 7 ). Subsequently, the passages 14 at the holes of the first wall side 6 produced ( 8th ). In the next step becomes the second wall side 7 opposite the spine 11 Angled, so that already results in the U-shape of the pressing shell. The wall sides 6 . 7 now run parallel to each other ( 9 ). In conclusion, passages 15 at the holes 17 the second wall side 7 made by placing appropriate molding tools through the holes 17 or passages 14 the first wall side 6 be passed so that the respective passages 14 . 15 pointing in opposite directions outwards. In this step, at the same time, the passages generated first 14 and also 12 calibrated, resulting in optimal coaxiality of the passages 12 . 14 leads.

Subsequently, in a manner not shown, a rubber-metal bearing in the aligned mounting seats 4 by the respective passages 14 . 15 are used.

1

axle component

2

The End

3

The End

4

bearing seat

5

bearing seat

6

wall side

7

wall side

8th

off-center Area

9

off-center Area

10

longitudinal edge

11

rear web

12

Draft

13

Draft

14

Draft

15

Draft

16

longitudinal edge

17

hole

18

metal sheet

B

width

G1

Just

G2

Just

M

center

Claims (1)

A method of making an axle component in the form of a slim pull / push bar with two bearing receivers having the following order of manufacture: a) cutting a metal sheet; b) punching the metal sheet ( 18 ) in the area of later bearing recordings ( 4 . 5 ); c) deep drawing a center of the metal sheet ( 18 ) arranged back web ( 11 ); d) bending a perforated first wall side ( 6 ) by 90 ° with respect to the spine ( 11 ), e) making passages ( 12 . 14 ) at the holes ( 17 ) of the first wall side ( 6 ); f) bending a perforated second wall side ( 7 ), so that the wall sides ( 6 . 7 ) are directly opposite; g) making passages ( 13 . 15 ) at the holes ( 17 ) of the second wall side ( 7 ), whereby at least the passage ( 12 . 14 ) on the first wall side ( 6 ) when making the passages ( 13 . 15 ) on the second wall side ( 7 ) is calibrated; h) inserting rubber-metal bearings into the bearing receptacles ( 4 . 5 ).