Method for Working a First Component and a Second Component by Laser Welding and Corresponding Device

Patent metadata

Field	Value
Publication number	US-2017312853-A1
Application number	US-201515523912-A
Country	US
Kind code	A1
Filing date	Nov 9, 2015
Priority date	Nov 7, 2014
Publication date	Nov 2, 2017
Grant date	—

Abstract

A method for working a first component and a second component comprises the following steps: providing the first component, which comprises a thermally sprayed electrically conductive layer, providing the second component, which has a longitudinally extended strip of copper, which at least in a first region has a thickness transversely to the longitudinal direction of more than 0.1 millimeter, arranging the strip and the layer one on top of the other, so that the first region of the strip and the layer have a contact region in common with one another, emitting a laser beam onto the contact region and forming a welded connection, which connects the strip and the layer to one another.

First claim

1 . A method for working a first component and a second component, comprising:
providing the first component, which comprises a thermally sprayed electrically conductive layer, providing the second component, which has a longitudinally extended strip ( 104 ) of copper, which at least in a first region ( 112 ) has a thickness transversely to the longitudinal direction of more than 0.1 millimeter, arranging the strip and the layer one on top of the other, so that the first region of the strip and the layer have a contact region in common with one another, emitting a laser beam onto the contact region; and thereby forming a welded connection, which connects the strip and the layer to one another.

2 . The method according to claim 1 , in which the laser beam is emitted such that the geometrical form of the welded connection is formed as annular, linear, rectangular or circular.

3 . The method according to claim 1 , in which the laser beam is emitted with first laser parameters and is subsequently emitted with second laser parameters that are different from the first laser parameters and are prescribed such that the welded connection is formed.

4 . The method according to claim 1 , in which the laser beam is emitted obliquely.

5 . The method according to claim 1 , in which the laser beam is emitted onto the strip on a side that is facing away from the layer.

6 . The method according to claim 5 , wherein provision of the second component comprises the step of
roughening the side of the strip that is facing away from the layer by means of the laser beam and/or chemically and/or mechanically.

7 . The method according to claim 1 , wherein the provision of the first component comprises the step of
thermally spraying copper to form the electrically conductive layer.

8 . The method according to claim 1 , wherein the provision of the second component comprises the step of
reducing the thickness in a welding region of the first region of the strip, and forming the welded connection in the welding region.

9 . The method according to claim 8 , wherein the step of reducing the thickness in the welding region comprises reducing to a prescribed second thickness transversely to the longitudinal direction, the second thickness being prescribed in dependence on a thickness of the thermally sprayed electrically conductive layer.

10 . A device, comprising:
a thermally sprayed electrically conductive layer, a strip of copper, which at least in a first region has a thickness transversely to the longitudinal direction of more than 0.1 millimeter, and a welded connection, which connects the layer and the first region of the strip to one another in order to form by means of the strip ( 104 ) an electrical and/or mechanical contact with respect to the layer.

11 . The device according to claim 10 , in which the strip has a second region outside the welded connection, the strip having in the second region a thickness transversely to the longitudinal direction that is greater than the thickness in the first region.

12 . The device according to claim 10 , in which the thermally sprayed electrically conductive layer comprises copper.

13 . The device according to claim 10 , in which:
the strip has in a welding region of the first region a second thickness that is less than the thickness, and the welded connection is formed in the welding region.

14 . The device according to claim 13 , in which:
the second thickness is prescribed in dependence on a thickness of the thermally sprayed electrically conductive layer.

15 . The device according to claim 10 , further comprising
a heating conductor layer is arranged on the electrically conductive layer, a contour of the electrically conductive layer being prescribed to avoid a buildup of heat at the electrically conductive layer, by at least one of the following: a prescribed width of a front side of the electrically conductive layer that is facing a middle region of the heating conductor layer, a prescribed distance from an isolation groove of the heating conductor layer, and a prescribed curvature of the contour.

Assignees

• Webasto SE

Inventors

• Kabelitz Thorsten
• Lipp Jürgen
• Schmidmayer Andreas
• Wegener Fritz
• Holzwarth Achim
• Buckl Stephan
• Klinkmüller Tino
• Reuter Andreas
• Göttl Karl
• Eckert Daniel

Classifications

• B23K2101/38

  Conductors · CPC title

• B23K26/244 Primary

  Overlap seam welding · CPC title

• B23K2101/42

  Printed circuits · CPC title

• B23K26/22

  Spot welding · CPC title

• H05K2203/107

  Using laser light · CPC title