DE102007036103A1 - Transmission component and method for producing the transmission component - Google Patents

Abstract

The invention is based on the object, a transmission component, which has good performance characteristics and is inexpensive to manufacture, and to propose a corresponding method for its production. For this purpose, a transmission component 8, 18 with a first joining partner 6 made of steel, which comprises a first welding section 11, and with a second joining partner 1 of a light metal, comprising a second welding section 15, wherein the joining partners 1, 6 on the first and second welding section 11, 15 are connected to each other directly by means of a weld 16 and / or connectable, wherein the joining partners 11, 15 are formed such that the joining partners 11, 15 during mutual welding for correct position end positioning in a joining direction 13 to move relative to each other , so that the resulting welding region 16 extends in the joining direction, and discloses a method for its production.

Description

Name of the invention

transmission component and method of manufacturing the transmission component

Field of the invention

The The invention relates to a transmission component with a first joining partner made of steel and a second joining partner made of a light metal, which connected to form the transmission component and / or are connectable, and a method for its production.

description

transmission components serve for example for the transmission of switching or Selective movements in stepped gears and are in a variety known from versions. The construction methods of transmission components are on the one hand by the load-oriented design and on the other hand due to weight optimization. These two requirements However, they are not regularly fulfilled at the same time. because the load-compatible design is often a wear-resistant Material, such as steel, and the weight-optimized design on the other hand requires a material made of light metal.

solutions exist in this field of tension to the effect that transmission assemblies from two or more components are assembled, wherein a component weight-optimized made of steel and another component weight-optimized made of light metal. After the professional world of a cohesive Critical connection of steel and light metal, The components of such transmission assemblies are usually over Intermediate pieces or the like connected to each other.

For example, according to the document DE 601 182 63 proposed a drive assembly with an adapter plate, wherein the adapter plate is connected at a first end with a propeller shaft made of aluminum and having a plurality of openings for receiving fastening elements, so that a stub shaft made of steel can be coupled via fastening elements.

The publication DE 25 00 666 also deals with a drive axle assembly and proposes a motor vehicle drive axle with a differential housing and two outgoing from this tube axes. The differential housing is designed as a light metal casting and has a drive shaft bearing part and two bearing flanges, wherein in the bearing flanges a sleeve is fixed, in which one of the tube axes can be used.

The publication DE 101 25 450 A1 relates to an actuating device for a sliding sleeve and a method for producing such an actuating device. The actuating device comprises a switching element with a shift fork made of a light metal, to which a driver made of steel is attached. The type of attachment is not discussed in the document. A known at least as an internal prior art similar transmission component with a joining partner made of steel and a joining partner made of light metal is connected via an adapter made of steel, which is pressed into the light metal part, optionally caulked and on which the steel part is welded.

Of the Invention is based on the object, a transmission component, which has good performance and cost to manufacture, and a corresponding method for its production propose.

These Task is achieved by a transmission component with the features of the claim 1 and solved by a method having the features of claim 16. Preferred or advantageous embodiments of the invention emerge from the dependent claims, the following Description and the attached figures.

in the According to the invention, a transmission component is proposed, which preferably for transmitting switching and / or dialing movements, especially in a multi-step transmission or in a dual-clutch transmission is trained. The transmission component is particularly preferred as a switching component for a sliding sleeve, as a switching bridge or Shift fork formed.

The Transmission component comprises at least one first joining partner made of steel material, wherein the first joint partner a first Welding section shows, and a second joint partner, which consists of a light metal, in particular aluminum, magnesium or their alloys is formed and a second welding section includes. For example, the light metal is known as AISi9Cu3 and / or the steel material as case hardening steel, tempered steel or Mild steel (16 MnCr 5, Cf 53, C 35, S 315) is formed. Especially If the first and / or the second joining partner is in one piece, z. B. as a casting or die-cast part formed.

The joining partners are directly connected to one another via the first and the second welding section by means of a weld, in particular materially and / or positively, and / or connected to one another. The claimed The subject relates firstly to the welded transmission component and, alternatively or additionally, to the unwelded joining partner of the transmission component.

The Welding is preferably based on resistance welding, in particular a capacitor discharge welding. such Capacitor discharge welds are characterized that the welding current in the joining partners impulsively and / or with a duration of less than 100 ms, preferably less than 10 ms.

The Joining partners are so for the weld prepared and / or have a corresponding joining geometry so that the joining partners during the mutual Welding for positionally correct final positioning in one Joining direction to move relative to each other. Preferably is the welding process as a pressure welding formed, wherein the joining partners during the Welded seam together in the joining direction become.

When Result of this type of welding creates a welding area, which extends in planar direction in the joining direction. In cross section perpendicular to the joining direction, the welding area preferably a round, linear, rectangular and / or broken contour on, so that the welding area sleeve-shaped is pronounced with a round or rectangular cross-section. The welded fabric border between the steel material and the light metal thus runs parallel to the joining direction.

Thereby, that the welding area is not vertical but parallel is oriented to the joining direction, this can be a very reach large connection cross-section, so that usually considered very critical connection of steel and light metal can be implemented reliably.

to mutual centering of the joining partners before welding the joining partners preferably have centering agents on, these in at least one Zentrierungsrichtung, which oriented perpendicular to the joining direction, center. The centering agents point to one of the two joining partners a Zentrierungsflächenabschnitt and on the other Joining a Anlageanlageabschnitt which interact for centering.

Preferably It is suggested that the centering surface section and / the contact surface portion parallel to the joining direction is aligned or are. With this inventive embodiment can be the joining partners before welding in a defined position at least in a centering direction at best tilt-free and positionally stable orientation. This artifice allows a reduction of rejects and simplifies production because the joining partners are self-centering are formed.

at A preferred embodiment of the invention comprises the centering means a guide section on one or both the joining partner is arranged and / or formed, so that the joining partners before welding in the centering direction be pre-centered. For example, it has a joining partner one in cross section in a plane passing through the joining direction and is formed by the centering direction, a section wise funnel-shaped cross section, so that during a relative movement the joining partner in jointing direction this automatically be pre-centered.

Especially for a stable and easy centering of the joining partners ensure each other, the centering surface section and the contact surface portion in the centering, ie in the centering position, in the centering direction with clearance fit arranged. Optionally, the fit can be even bigger to get voted. With this training is ensured that the joining partners without excessive Force are performed in the centering position can and at the same time are positioned with low tolerances.

Farther it is preferred that the first welding section and the second welding section, in particular in the centering direction in the unwelded state of the joining partner a Have oversize fit each other. This training is preferred in resistance welding, in particular capacitor discharge welding and / or Press welding, the excess material to the connection the joining partner is used. In particular, the Joining partners designed so that an overpass from the centering position in the correct position end position of Joining partners only by liquefying the weld sections at least within the framework of the excess material is.

at a particularly advantageous embodiment, the Joining partners designed so that the centering only along a single centering direction takes place and in a direction perpendicular thereto a mutual shift of joining partners, for example for tolerance adjustment, is possible. This embodiment allows for a stable centering of the joining partners and on the other hand, an adjustment of the joining partners to each other, for example, to compensate for manufacturing tolerances or transmission components to manufacture with defined offset joining partners.

In a constructive realization of the invention, one of the joining partners has an integrally molded adapter and the other joining partner a receiving opening for the adapter, wherein the centering surface portion is disposed either on the adapter or on the receiving opening. In the case of the adapter, the centering surface portion is formed as a tapered and / or stepped portion, in particular at the free end of the adapter. The width in the centering direction of the adapter in the region of the abutment surface portion is smaller or formed with clearance against the corresponding width of the receiving opening, so that the adapter can be inserted in a simple manner in the receiving opening at least in the region of the abutment surface portion. Alternatively, the centering surface portion is formed as a broadening of the receiving opening in the centering direction, so that the adapter can be inserted in particular with the welding portion for the purpose of mutual centering of the joining partners in the receiving opening.

at A preferred embodiment of the invention is optionally a circular cross-section adapter and / or corresponding receiving opening used to an adjustment of the joining partners by mutual rotation to allow, or a shape with a lower symmetry, for Example a rectangular section, chosen to be too an adjustment with respect to the rotation of the joining partners to each other to reach.

Optional can the centering surface portion and also the first and / or the second welding section in a plane perpendicular be designed to be continuous around the joining direction, alternatively, the named sections are only partial intended. It is particularly preferred that the sections trained centering surface sections or welding sections are distributed so that the joining partners in the centering position Centered in terms of centering and at the same time in a compensation direction are arranged displaceable. This embodiment allows at least in the compensation direction, the joining partners can be positioned before welding to each other, and that the adjustment in the compensation direction to the correct position End position of the joining partners after welding preserved.

at A preferred embodiment of the invention is the first joining partner as a steel cam or a switching jaw and the second joining partner as a light metal base body, in particular with a honeycomb Structure designed to increase the rigidity, which together, for example, a switching bridge, a shift fork form the like.

One Another object of the invention relates to a process for the preparation the transmission component as claimed or described above, wherein in a joining step the joining partners with each other welded and the joining partners during the welding in the joining direction relative to each other to be moved.

Thereby, that the welding sections of the joining partners preferred overlapping in excess or in joining direction are designed to each other, the joining step comprises a Pressure welding, preferably at the same time as a resistance welding, in particular designed as a capacitor discharge welding is. The joining partners are preferred in a centering step by the centering means to each other in only one or all Directions perpendicular to the joining centered to each other. Following the previously disclosed development of the invention it is preferred that the joining partners before the centering step precentered by the guide sections. Farther it is preferred that the joining partners in particular for a tolerance compensation in a direction perpendicular to the joining direction and at the same time be moved perpendicular to the centering direction.

Further Features, advantages and effects of the invention will become apparent the following description of preferred embodiments as well as the attached figures of the invention. Showing:

1 to 4 a first embodiment of the invention in different views;

5 to 9 A second embodiment of the invention in different views;

10 to 12 a third embodiment of the invention in different views;

13 to 15 A fourth embodiment of the invention in various views;

16 to 19 a fifth embodiment of the invention in various views;

20 and 21 A sixth embodiment of the invention in various views.

Same or corresponding reference numerals denote each same or corresponding parts, areas or sizes.

The 1 shows in a schematic, three-dimensional view of the main body 1 a jumper 8th ( 3 ) for transmitting switching movements of a shift drum (not shown) on a shift fork (not shown).

The main body 1 has a tubular switching shaft receptacle 2 for receiving a switching shaft (not shown). The switching shaft holder 2 goes into a lateral plan view starting from the Schaltwellenaufnahme 2 tapered transmission section 3 over, which for stabilization honeycomb-like diagonal webs 4 having. At the on the side of the switching shaft holder 2 arranged front shows the main body 1 a receiving opening 5 , in the completion of the jumper 8th a steel cam 6 according to 2 is welded. On the opposite side, the base body 1 a switching mouth 7 on, which operates the shift fork. Functionally considered switching and / or Wählbewegungen a transmission (not shown) from the shift drum in the steel cams 6 initiated, over the body 1 transmitted and through the switching mouth 7 passed on to the shift fork. The main body 1 is as an integral part made of aluminum or an aluminum alloy and the steel cam 6 formed as a one-piece component of a steel material.

For welding of base body 1 and steel cam 6 - nachfogend also called joining partners - these each have a specially adapted joining geometry. As can be seen in particular from the 2 , a side view of the steel nock 6 , and the 3 that the jumper 8th in a schematic cross-sectional view in a plane perpendicular to the switching shaft receiving 2 shows, is the steel cam 6 from a cam area 9 and an adapter 10 educated. The adapter 10 has a first cylinder jacket-shaped welding section 11 on, to which a centering surface section 12 followed. The centering surface section 12 is opposite the first welding section 12 formed tapered and / or stepped, wherein the functional surfaces of the first welding section 11 and the centering surface portion 12 parallel to a joining direction 13 extend in which the joining partners 1 . 6 be moved relative to each other at the weld.

The receiving opening 5 points in the joining process in joining direction 13 first a funnel-shaped guide section 14 on, which with the free end of the adapter 10 , which optionally can also be chamfered, cooperating in such a way that the steel cam 6 opposite the receiving opening 5 is pre-centered.

In depth extension in joining direction 13 then has the receiving opening 5 a second welding section 15 on, which after the joining process with the first welding section 11 is welded. The diameter of the adapter 10 in the region of the centering surface section 12 is here as a clearance against the second weld section 15 trained so that the steel cam 6 after the pre-centering by the guide section 14 for the welding process in the correct position in the receiving opening 5 to the transition between Zentrierungsflächenabschnitt 12 and first welding section 11 can be inserted.

Starting from this centering position takes place in a next step, the actual welding process, the joining partners 1 and 6 in joining direction 13 pressed together and welded at the same time by means of capacitor discharge welding.

The 4 shows the jumper 8th in the welded state in the same representation as in 3 , where the steel cam 6 is arranged welded in its final position. The now in relation to the joining direction 13 arranged at the same height first and second welding sections 11 . 15 are by a circumferential cylinder jacket-shaped weld 16 materially connected to each other in the joining direction 13 extends.

The 5 to 9 show a second embodiment of the invention, wherein compared to the embodiment of 1 to 4 the centering surface section 12 not as a taper on the free end of the adapter 10 but as a diameter-broadened section in the entrance area of the receiving opening 5 is arranged. In this embodiment, the adapter 10 a constant cross-sectional diameter, optionally at the free end, the edge regions of the adapter 10 are chilled. The receiving opening 5 on the other hand shows the centering surface section in a first area 12 whose walls are parallel to the joining direction 13 are aligned. Following this is the second welding section 15 arranged, wherein the free diameter of the receiving opening 5 in the area of the second welding section 15 smaller than the outer diameter of the adapter 10 in the area of the first welding section 11 is selected so that there is an interference fit. For example, with one or the interference fit, the diameter of the receiving opening 5 formed by one to five tenths of a millimeter smaller than the corresponding diameter of the adapter 10 ,

The 10 to 12 show a third embodiment of the invention, wherein the adapter 10 has a rectangular cross-sectional outline and also the receiving opening 5 is rectangular. In contrast to the previous embodiments, in which the welding sections 11 and 15 are arranged continuously encircling, in the third embodiment, the first welding sections 11 only on opposite sides of the adapter 10 whereas the remaining sides remain unwelded during further fabrication. The rectangular up receiving opening 5 is designed by the dimensions so that in an extension direction perpendicular to the longitudinal extent of the switching shaft receiving 2 the free diameter as Übermaßpassung to the adapter 10 in the area of the first welding sections 11 is trained. In a direction parallel to the switching shaft holder 2 the diameter is significantly larger than the corresponding diameter of the adapter 10 trained, so that - as is clear from the 12 results - the adapter 10 in a tolerance direction 17 parallel to the longitudinal extent of the switching shaft holder 2 slidably inserted in the centering.

Analogous to the first embodiment, the adapter 10 a centering section 12 on, in the plane extension parallel to the joining direction 13 is arranged and which, however, the steel cams 6 only in the centering direction perpendicular to the longitudinal extension of the switching shaft holder 2 centered. Alternatively, the centering section 12 analogous to the second embodiment in the receiving opening 5 be arranged.

The 13 to 15 show a fourth embodiment of the invention in the form of a shift fork 18 whose basic body is formed from an aluminum alloy and which by means of a further switching shaft receptacle 19 on a second, not shown, switching shaft can be plugged. Optionally, the shift fork 18 for interaction with the switching bridge 8th educated. The shift fork 18 has two free fork ends 20 and 21 and a Schaltmaulbereich 22 on, about the switching movements in the shift fork 18 be initiated. The shift mouth area 22 includes a one-piece to the shift fork 18 molded table 23 on which a switching mouthpiece 24 made of steel in joining direction 13 put on and welded. The switching mouth element 24 has two bars at the free end 25 . 26 on which the contact area to the jumper 8th or to form another switching movement-transmitting component. Furthermore, the switching mouth element formed, for example, as a stamped and bent steel sheet comprises 24 a window-like receiving opening 5 to accommodate one at the table 23 integrally molded adapter 10 ,

As can be seen from the detail shots in the 14 and 15 results is intake opening 5 in depth extension in joining direction 13 formed with a constant profile, wherein the inner walls of the receiving cutout the first welding portion 11 form.

The adapter 10 comprises at its free end gradations in the form of a Zentrierungsflächenabschnitts 12 and a pre-centering 14 , which are formed analogously to the sections in the preceding figures. The centering surface section 12 is circumferentially formed in a possible alternative embodiment, so that the Schaltmaulelement 24 is centered in all directions, in modified embodiments again only two opposite surfaces are prepared for welding, so that the Schaltmaulelement 24 is centered only in this centering direction. In still other embodiments of the invention, the centering surface portion 12 in the Schaltmaulelement 24 integrated.

The 16 to 19 show a fifth embodiment of the invention in the form of another shift fork 18 made of light metal, wherein, in contrast to the fourth embodiment of the adapter 10 as an integral part of the Schaltmaulelements 24 is formed in the form of a section with a rectangular base. The table 23 points as a receiving opening 5 four corner bars 27 on, which are arranged so that the adapter 10 on two opposite side walls with the corner bars 27 is welded and remains unfixed on the other two side surfaces. For centering point the corner bars 27 centering portions 12 on, which are formed and arranged analogously to the preceding embodiments. Also in this embodiment, it is possible, the Schaltmaulelement 24 during centering in the tolerance direction 17 adjust.

The 20 and 21 show a sixth embodiment of the invention in the form of a switching bridge 8th , which is formed structurally analogous to the first embodiment and in the 20 is shown in a schematic cross-sectional view. The switching bridge 8th includes a main body 1 from an aluminum alloy, which at its in 20 left end portion of a shift shaft receptacle 2 and one in a receiving opening 5 used, one-piece steel cam 6 with an adapter 10 includes. At the other free end of the jumper is a switching jaw 7 formed.

The 21 shows in a highly schematic way the section X in the 20 to the type of connection between steel cams 6 or adapter 10 and the body 1 to illustrate again. In the 21 is in the joining area on the left side of the adapter 10 with a solid line and the receiving opening 5 shown with broken line. On the right side of the joining area, however, is the receiving opening 5 with a solid line and the adapter 10 shown with dashed line. As is best shown on the left side, the adapter points 10 first a cylinder jacket-shaped, first welding section 11 on, the on a gradation in the likewise cylinder jacket centeringabab cut 12 passes. On the basis of the joining geometry on the right side can be read that the receiving opening 5 first a funnel-shaped or chamfered guide section 14 which forms a frusto-conical surface and then into a cylinder jacket-shaped second welding section 15 passes. The free diameter of the receiving opening 5 in the area of the second welding section 15 is as a clearance fit to the adapter 10 in the region of the centering surface section 12 designed so that the steel cams 6 initially inserted centering only in the receiving opening, wherein the centering process by the guide portion 14 is supported. During the actual welding process via a capacitor discharge welding, the steel cam becomes 6 in joining direction 13 in the receiving opening 5 pressed, between the first welding section 11 and second welding section 15 overlapping arranged oversize material 28 is melted and used as a connecting material.

1

body

2

Switching shaft receiving

3

transmission section

4

Diagonal webs

5

receiving opening

6

steel cam

7

shift mouthpiece

8th

jumper

9

cam range

10

adapter

11

first welding portion

12

Zentrierungsflächenabschnitt

13

joining direction

14

guide section

15

second welding portion

15

receiving recess

16

Weld

17

tolerance towards

18

shift fork

19

Switching shaft receiving

20 21

fork end

22

Shift jaw area

23

table

24

Shift mouthpiece element

25 26

two Stege

27

corner webs

28

oversize material

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 60118263 [0005]
• - DE 2500666 [0006]
• - DE 10125450 A1 [0007]

Claims (21)

Transmission component ( 8th . 18 ) with a first joint partner ( 6 ) made of steel, which has a first welding section ( 11 ) and with a second joint partner ( 1 ) of a light metal, which has a second welding section ( 15 ), characterized in that the joining partners ( 1 . 6 ) over the first and the second welding section ( 11 . 15 ) directly by means of a welding area ( 16 ) are interconnected and / or connectable, the joining partners ( 11 . 15 ) are formed such that the joining partners ( 11 . 15 ) during the mutual welding for correct positioning in a joining direction ( 13 ) are to move relative to each other, so that the resulting weld area ( 16 ) runs in the joining direction. Transmission component ( 8th . 18 ) according to claim 1, characterized in that the joining partners centering means for mutual centering before the welding in at least one centering direction perpendicular to the joining direction ( 13 ) and the centering means have a centering surface section ( 12 ) on one of the joining partners and a contact surface section on the other joining partner, wherein the centering surface section ( 12 ) and / or the contact surface section parallel to the joining direction ( 13 ) is or are aligned. Transmission component ( 8th . 18 ) according to claim 2, characterized in that the centering means comprise a guide section ( 14 ) on one or both of the joining partners ( 1 . 6 ) is arranged and aligned so that the joining partners are pre-centered in the centering direction. Transmission component ( 8th . 18 ) according to one of the preceding claims, characterized in that centering surface section ( 12 ) and contact surface portion are arranged in the centering in the centering with clearance. Transmission component ( 8th . 18 ) according to one of the preceding claims, characterized in that the first welding section ( 11 ) and second welding section ( 15 ) In particular in the centering direction in the unwelded state of the joining partners have an interference fit. Transmission component ( 8th . 18 ) according to one of the preceding claims, characterized in that the joining partners ( 1 . 6 ), so that the centering takes place only in a centering direction and in a direction of tolerance perpendicular thereto ( 17 ) a mutual shift for tolerance adjustment is possible. Transmission component ( 8th . 18 ) according to one of the preceding claims, characterized in that the first or the second joining partner ( 1 . 6 ) an adapter ( 10 ), wherein the adapter ( 10 ) in joining direction ( 13 ) the first or second welding section ( 11 . 15 ) and the centering surface section ( 12 ), wherein the diameter perpendicular to the joining direction ( 13 ) of the first and second welding section ( 11 . 15 ) greater than the diameter perpendicular to the joining direction ( 13 ) of the centering section ( 12 ) is trained. Transmission component ( 8th . 18 ) according to claim 7, characterized in that the second or the first joining partner has a receiving opening ( 5 ), wherein the receiving opening in the depth direction at least partially as the second or first welding section ( 15 . 11 ) and wherein the free diameter perpendicular to the joining direction ( 13 ) in the region of the second or first welding section ( 15 . 11 ) greater than the corresponding diameter of the Zentrierungsflächenabschnitts ( 12 ) and smaller than the corresponding diameter of the first and second welding section ( 11 . 15 ) is trained. Transmission component ( 8th . 18 ) according to one of claims 1 to 6, characterized in that the first or the second joining partner ( 1 . 6 ) an adapter ( 10 ), wherein the adapter ( 10 ) the first or second welding section ( 11 . 15 ) having. Transmission component ( 8th . 18 ) according to claim 9, characterized in that the second or the first joining partner ( 6 . 1 ) a receiving opening ( 5 ), wherein the receiving opening in depth extension the Zentrierungsflächenabschnitt ( 12 ) and the second or first welding section ( 15 . 11 ), wherein the diameter perpendicular to the joining direction of the first and second welding section ( 11 . 15 ) smaller than the free diameter perpendicular to the joining direction in the region of the Zentrierungsflächenabschnitts ( 12 ) and / or greater than the free diameter perpendicular to the joining direction in the region of the second or first welding section ( 15 . 11 ) is trained. Transmission component ( 8th . 18 ) according to one of claims 7 to 10, characterized in that the adapter ( 10 ) and / or the receiving opening ( 5 ) has a circular or a rectangular cross-section in a plane perpendicular to the joining direction ( 13 ) having. Transmission component ( 8th . 18 ) according to one of the preceding claims, characterized in that the centering surface section ( 12 ) and also the first and / or the second welding section ( 11 . 15 ) in a direction of rotation in a plane perpendicular to the joining direction ( 13 ) are provided only in sections and / or interrupted. Transmission component ( 8th . 18 ) according to claim 12, characterized in that the partially formed Zentrierungsflächenabschnitte ( 12 ) or welding sections ( 11 . 15 ) are distributed so that the joining partners centered in the centering position in the centering direction and in a compensation or tolerance direction ( 17 ) are movable. Transmission component ( 8th . 18 ) according to one of the preceding claims, characterized in that it is used for the transmission of switching and / or selection movements, in particular as a switching bridge ( 8th ) or shift fork ( 18 ), is trained, Transmission component ( 8th . 18 ) according to one of the preceding claims, characterized in that the first joining partner ( 6 ) as a steel cam or switching jaw and / or the second joining partner as a lightweight structural body ( 1 ) is trained Method for producing the transmission component ( 8th . 18 ) according to one of the preceding claims, characterized in that the joining partners ( 1 . 6 ) are welded together in a joining step, wherein the joining partners during welding in the joining direction ( 13 ) are moved relative to each other. Method according to claim 16, characterized in that that the joining step comprises a pressure welding. Method according to claim 16 or 17, characterized that the joining step is a resistance welding, in particular comprises a capacitor discharge welding. Method according to one of claims 16 to 18, characterized in that the joining partners in a centering step before the joining step by the centering means to each other be centered. Method according to one of the preceding claims 16 to 19, characterized in that the joining partners before the centering step by the or the guide sections ( 14 ) be pre-centered. Method according to one of the preceding claims 16 to 20, characterized in that the joining partners - in particular for a tolerance compensation - in a direction perpendicular to the joining direction ( 13 ) and are shifted perpendicular to the centering direction.