DE102023004146A1 - joining of components and processes - Google Patents

Abstract

The invention relates to a joining composite (10) of components (14, 16) by means of a laser welding device (12), with a first component (14) and a second component (16), which are arranged along respective longitudinal sides (18, 20) and are welded together by laser welding in the region of their respective end faces (22, 24), wherein the first component (14) is arranged on the second component (16) in such a way that the first component (14) has a projection (15) which is at least partially placed over the region of the end face (24) of the second component (16) and the components (14, 16) are thus welded together in the region of their respective end faces (22, 24). The invention further relates to a method for producing such a joining composite (10).

Description

The invention relates to a joining composite of components by means of a laser welding device according to the preamble of patent claim 1. Furthermore, the invention relates to a method.

Laser welding of hairpins is of course well known and is used, for example, in DE 10 2022 127 730 A1 already revealed. Hairpins are to be welded together.

The object of the invention is to design an arrangement and preparation of components to one another in such a way that a particularly efficient and compact welded connection for the two components is possible.

This object is achieved according to the invention by a joint according to patent claim 1 and by means of a method according to the invention. Advantageous embodiments of the invention can be found in the dependent claims.

A first aspect of the invention relates to a joining composite of components, in particular hairpins, by means of a laser welding device, with a first component and a second component, which represent hairpins and/or busbars, which are arranged along respective longitudinal sides and are welded to one another by laser welding in the region of their respective end faces.

In order to achieve the object of the invention, it is provided that the first component is arranged on the second component in such a way that the first component has a projection which is at least partially pulled over the area of the front side of the second component and the components are thus welded together in respective end areas, in particular in the area of their respective front sides. In other words, the first and the second component are held together in such a way, for example by means of a clamping device, that a projection is provided in the longitudinal direction of extension of the first component. This projection means that the first component is arranged higher than the second component. In a horizontal arrangement, the first component would be shown to be longer than the second component. In other words, two components are arranged next to one another, the first being longer than the second, in order to provide a projection. By means of this projection, it is intended to overlap or pull over the front side of the second component. This means that the overhang is bent or folded or slipped over or overlapped over this front area or over the area of the front side of the second component. This creates a special arrangement of the first and second components on one another, whereby this partial slipping over provides a new surface for welding the two components together. The overhang, which is now bent, is intended to be welded to the end area of the second component, whereby the respective melts of the two components are joined together to form an overall melt, whereby the two components or the hairpins and/or busbars are welded together.

In an advantageous embodiment of the invention, it is provided that the projection is pulled over in such a way that the front side of the second component is essentially completely covered. In this case, it is provided that the front side is thus completely covered, i.e. that the projection is bent by 90 degrees, for example, and the front side of the second component is arranged in the bending corner. This results in a gap between the edge of the front and long sides of the second component and the projection, wherein it is provided here to aim the laser beam at this edge and thus weld the respective melts together. The respective melts on the first and second components are heated by the laser beam in such a way that they merge into one another and thus represent a total melt.

In another advantageous embodiment of the invention, it is provided that the projection is put over in such a way that a portion of the projection at least partially rests on a further longitudinal side of the second component opposite the long side. In this case, it is provided that the projection is arranged in a U-shape on the first component, and the second component is inserted into the inner U-shape of the projection. The laser beams are then directed at the further long side and at the front side of the projection, thus enabling the two components to be welded together.

In another advantageous embodiment of the invention, it is provided that the components are welded together at their respective widths. In this case, the laser beam is directed at the widths, whereby the width, for example with the U-shape, and the width of the second component are fused together to form a total melt.

In a further advantageous embodiment of the invention, it is provided that the second component is arranged at least partially perpendicular to the first component and in the region of their respective front sides are welded together. It is also intended to arrange the two components at an angle to each other and then to weld them, whereby the angle of the arrangement can be approximately 90 degrees, for example. In particular, this provides another possibility of holding the two components together, whereby different angles to each other are also possible.

In another advantageous embodiment of the invention, it is provided that the overhang is put over in such a way that a width side of the second component is essentially completely covered. In this case, as previously mentioned, the overhang is folded by 90 degrees, for example, and the front side of the second component is arranged in this bend and a welded connection is made at the edge of the front side of the first component with the width side of the second component.

In another advantageous embodiment of the invention, it is provided that the projection is turned over in such a way that a portion of the projection at least partially rests on a further longitudinal side of the second component opposite the longitudinal side. In this case, the first component is again created or manufactured with a U-shape, with the second component being arranged in the inner U-shape and thus a welded connection being created between the width side of the second component and the front side of the first component.

In another advantageous embodiment of the invention, it is provided that the first component is welded together on its wide side and the second component on its front side. This time, the laser beam is not directed vertically from top to bottom, but sideways, so that the wide side or the U-shape and the front side of the second component are welded together.

In a further advantageous embodiment of the invention, it is provided that a projection is turned over in such a way that a portion of the projection at least partially rests on a further longitudinal side of the second component opposite the longitudinal side, and the components are welded together by means of a welded connection between the front side of the first component and the further longitudinal side of the second component. This results in a particularly large-area new type of welding or welded connection.

A further aspect of the invention relates to a method for producing a joint of components by means of a laser welding device, in which a first component and a second component, which are arranged along respective long sides, are welded together by laser welding in the region of their respective end faces. In this case, it is provided that the first component is arranged on the second component in such a way that a projection is provided by means of the first component, which is at least partially pulled over the area of the end face of the second component and the components are thus welded together in the region of their respective end faces. This means that the method is designed to weld the various arrangements of the two components together. Furthermore, it is also possible to control the arrangement of the two components by means of an optical detection device.

Further advantages, features and details of the invention emerge from the following description of preferred embodiments and from the drawings. The features and combinations of features mentioned above in the description as well as the features and combinations of features mentioned below in the description of the figures and/or shown alone in the figures can be used not only in the respective combination specified, but also in other combinations or on their own, without departing from the scope of the invention.

• 1 eine erste Perspektivansicht des Fügeverbunds mit einem übergestülpten Überstand eines Bauteils über das andere;
• 2 eine weitere Perspektivansicht des Fügeverbunds mit einer Schweißverbindung;
• 3 eine Perspektivansicht des Fügeverbunds mit der Schweißverbindung an der Breitenseite der Bauteile;
• 4 eine weitere Perspektivansicht des Fügeverbunds mit einem wenigstens teilweise übergestülpten Überstand des ersten Bauteils;
• 5 eine weitere Ausgestaltung des Fügeverbunds mit einer Schweißverbindung; und
• 6 eine weitere Perspektivansicht der Ausgestaltung des Fügeverbunds mit einer Schweißverbindung an einer Breitenseite.

The following show:

• 1 a first perspective view of the joint with a projection of one component over the other;
• 2 another perspective view of the joint with a welded connection;
• 3 a perspective view of the joint with the welded connection on the width side of the components;
• 4 a further perspective view of the joint with an at least partially slipped over projection of the first component;
• 5 a further embodiment of the joint with a welded joint; and
• 6 another perspective view of the design of the joint with a welded connection on one width side.

In the figures, identical and functionally equivalent elements are provided with the same reference symbols.

The 1 shows a joint 10 of components 14, 16 in a perspective view, which are welded together by a laser welding device 12, which is not yet shown The first component 14 is arranged on the second component 16 in such a way that the first component 14 has a projection 15 which is pulled over the area of the front side 24 of the second component 16, the projection 15 being pulled over in such a way that a partial area 15a of the projection 15 at least partially rests on a further longitudinal side 20a of the second component 16 opposite a longitudinal side 20. The projection is thus pulled over in such a way that the front side 24 of the second component 16 is completely covered. An angle β here is 180 degrees in order to represent the particularly U-shaped configuration of the second component or the projection of the second component here.

In particular, it is provided here to use a method for producing the joint 10 of components 14, 16 by means of the laser welding device 12 (not shown), in which the first component 14 and the second component 16, which are arranged along respective longitudinal sides 18, 20, are welded together by laser welding in the region of their respective end faces 22, 24. It is provided here that the first component is arranged on the second component in such a way that a projection is provided by means of the first component, which is completely placed over the area of the end face 24 of the second component 16, and the components are thus welded together in the region of their respective end faces.

2 and 3 show different types of welding, whereby in the 2 a perspective view of the joint 10 is shown, in which a laser beam of the laser welding device 12 is directed from top to bottom onto the joint. Thus, one end face of the first component is welded to the other long side 20a of the second component 16. In particular, starting from the weld connection 17, a possible welding depth 17a is shown, which can protrude from the turned-over end 15a into the second component 16 or even into the other side of the first component 14. This shows the increased tolerance of the process with regard to a fluctuating welding depth.

3 on the other hand, shows a vertical illumination of the joint 10 by means of the laser welding device 12, whereby the broad sides 21 and 23 of the first component 14 and the second component 16 are welded together.

4 shows a perspective view of the joint 10 with the first component 14 and the second component 16, wherein the laser beam is directed horizontally from top to bottom by the laser welding device 12 onto the front side of the second component 16 and onto the edge of the front side of the first component 14 with the inner surface 18 of the first component 14. This creates a melt 17 or a weld 17, which is specifically created between the two components 14, 16.

5 shows a further embodiment in a perspective view, in which the joint assembly 10 represents the first components 14 and 16, but these are arranged perpendicular to each other and welded together in the area of their respective front sides 22, 24. Analogous to the previously shown 1 to 3 Here too, the projection 15 is slipped over in such a way that a partial area 15a of the projection 15 at least partially rests on a further longitudinal side 20a of the second component 16 opposite the longitudinal side 20. Here too, the laser welding device 12 is intended to direct the laser beam from top to bottom onto the edge of the partial area 15a of the projection 15 and onto the further longitudinal side 20a of the second component 16. This results in a clear welded connection 17 with the difference that the components 14, 16 are arranged perpendicular to one another.

6 shows a further perspective view of the joint 10 of the first component 14 and the second component 16, wherein it is provided here that in the case of a projection 15 which is slipped over in such a way that a partial area 15a of the projection 15 at least partially rests on a further longitudinal side 20a of the second component 16 opposite the longitudinal side 20, the components 14, 16 are welded together by means of a welded connection between the end face 22 of the first component and the further longitudinal side 20a of the second component 16. In particular, the laser beam of the laser welding device 12 is directed horizontally onto the width sides of the components 14, 16, whereby the welded connection or melt 17 is arranged laterally.

list of reference symbols

10

joint

12

laser welding device

14

first component

15

supernatant

15a

sub-area

16

second component

17

weld

17a

welding depth

18

first long side

20

second long side

21

first broadside

22

first front side

23

second broadside

24

second front side

z

vertical direction

y

transverse direction

x

longitudinal direction

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 accepts no liability for any errors or omissions.

Cited patent literature

• DE 10 2022 127 730 A1 [0002]

Claims (10)

Joining composite (10) of components (14, 16) by means of a laser welding device (12), with a first component (14) and a second component (16), which are arranged along respective longitudinal sides (18, 20) and are welded together by laser welding in respective end regions, characterized in that the first component (14) is arranged on the second component (16) in such a way that the first component (14) has a projection (15) which is at least partially slipped over the region of the end face (24) of the second component (16) and the components (14, 16) are thus welded together in the region of their respective end face (22, 24). joint (10) according to claim 1 , characterized in that the projection (15) is slipped over in such a way that the front side (24) of the second component (16) is essentially completely covered. Joining compound (10) according to claim 1 or 2 , characterized in that the projection (15) is slipped over in such a way that a partial region (15a) of the projection (15) at least partially rests on a further longitudinal side (20a) of the second component (16) opposite the longitudinal side (20). Joining composite (10) according to one of the preceding claims, characterized in that the components (14, 16) are welded together at their respective broad sides (21, 23). Joining composite (10) according to one of the preceding claims, characterized in that the second component (16) is arranged at least partially perpendicular to the first component (18) and are welded together in the region of their respective end faces (22, 24). joint (10) according to claim 4 , characterized in that the projection (15) is slipped over in such a way that a width side (23) of the second component (16) is essentially completely covered. Joining composite (10) according to one of the preceding claims, characterized in that the projection (15) is slipped over in such a way that a partial region (15a) of the projection (15) at least partially rests on a further longitudinal side (20a) of the second component (16) opposite the longitudinal side (20). Joining composite (10) according to one of the preceding claims, characterized in that the first component (14) is welded to one another at its wide side (21) and the second component (16) is welded to one another at its end side (24). Joining composite (10) according to one of the preceding claims, characterized in that in one of the projections (15) which is slipped over in such a way that a partial region (15) of the projection (15a) at least partially rests on a further longitudinal side (20a) of the second component (16) opposite the longitudinal side (20), the components (14, 16) are welded to one another by means of a welded connection between the end face (22) of the first component (14) and the further longitudinal side (20a) of the second component (16). Method for producing a joint (10) of components (14, 16) by means of a laser welding device (12), in which a first component (14) and a second component (16), which are arranged next to one another along respective longitudinal sides (18, 20), are welded to one another by laser welding in the region of their respective end faces (22, 24), characterized in that the first component (14) is arranged on the second component (16) in such a way that a projection (15) is provided by means of the first component (14), which is at least partially pulled over the region of the end face (24) of the second component (16) and the components (14, 16) are thus welded to one another in the region of their respective end faces (22, 24).

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