Method for producing at least one defined connecting layer between two components of different metals

Patent metadata

Field	Value
Publication number	US-11951559-B2
Application number	US-201917270524-A
Country	US
Kind code	B2
Filing date	Oct 1, 2019
Priority date	Oct 29, 2018
Publication date	Apr 9, 2024
Grant date	Apr 9, 2024

Abstract

A method produces at least one defined connecting layer between two components, wherein the first component is produced from a first metallic material and the second component is produced from a second metallic material and the first and/or second component has a coating of a third metallic material, the melting temperature of which is lower than the melting temperature of the first and second materials. In this case, the coating of at least one of the components is heated locally to a connecting temperature, which lies above the melting temperature of the third material and lies below the melting temperature of the first material and below the melting temperature of the second material, and is cooled down in order to form a defined connecting layer when the coating solidifies.

First claim

What is claimed is:

1. A method for producing at least one connecting layer, which is defined with respect to its two-dimensional extent, between two components, wherein the first component is produced from a first metallic material and the second component is produced from a second metallic material, and the first and/or the second component comprises a coating composed of a third metallic material whose melting temperature is lower than the melting temperature of the first and of the second material, the method comprising the steps of:
locally heating the coating in a region which is predetermined for production of the defined connecting layer to a connecting temperature which lies above the melting temperature of the third material and lies below the melting temperature of the first material and below the melting temperature of the second material;
interrupting a supply of energy as soon as the coating is at least partially melted in the region of the defined connecting layer;
cooling the at least partially melted coating in order to, during solidification of the coating, form the defined connecting layer which is fixedly connected to the first component and fixedly connected to the second component and which is defined with respect to its two-dimensional extent,
wherein, during at least one of the above steps, the first component and the second component, with the coating arranged therebetween, are pressed against one another in an intended connecting position,
wherein the heating of the coating, and also the cooling of the at least partially melted coating, for the production of the defined connecting layer is effected by a tool which has both a heating and a cooling function.

2. The method according to claim 1 , wherein
the cooling of the at least partially melted coating is carried out substantially along a predefined time-temperature curve.

3. The method according to claim 1 , wherein
for the cooling of the at least partially melted coating, an active cooling process is employed, using a cooler.

4. The method according to claim 3 , wherein
the cooler comprises cooling air, cooling water, nitrogen, dry ice, at least one chill mold or a cooling tool.

5. The method according to claim 1 , wherein
the coating arranged on the first component and/or on the second component is a functional coating, which is produced in from zinc, copper, tin, brass or bronze materials or comprises at least a predominant proportion of one or more of said materials.

6. The method according to claim 1 , wherein
the connecting layer which is defined with respect to its two-dimensional extent is of punctiform or linear configuration, and has, in at least one direction, an extent of less than 5 mm.

7. The method according to claim 1 , wherein
the connecting layer which is defined with respect to its two-dimensional extent is of punctiform or linear configuration, and has, in at least one direction, an extent of less than 1 mm.

8. The method according to claim 6 , wherein
the linear configured connecting layer has, in at least one direction, an extent of several millimeters in relation to that surface of the at least one component on which said layer is arranged.

9. The method according to claim 1 , wherein
the locally heating of the coating in the predetermined region is effected by the tool which introduces energy into the coating, and
the energy is introduced by resistance heating, induction heating, vibration-induced heating or ultrasonic heating.

10. The method according to claim 1 , wherein
the heating of the coating for the production of the defined connecting layer is effected by the tool which heats the coating in accordance with a shape and dimensions of the defined connecting layer.

11. The method according to claim 1 , wherein
the heating of the coating, and also the cooling of the at least partially melted coating, for the production of a linear connecting layer is effected progressively along the predetermined region.

12. The method according to claim 1 , wherein
the tool for heating the coating is tapered at a contact surface on a component.

13. The method according to claim 12 , wherein
the tool has a conical, wedge-shaped or blade-shaped configuration.

Assignees

• Bayerische Motoren Werke Ag

Inventors

• Glueck Bernhard
• Kirschner Robert

Classifications

• B23K15/008 Primary

  Spot welding · CPC title

• B23K35/007

  at least one of the workpieces being of copper or another noble metal · CPC title

• B23K35/0255

  for use in welding (B23K35/0205 takes precedence) · CPC title

• B23K35/262

  Sn as the principal constituent · CPC title

• B23K35/282

  Zn as the principal constituent · CPC title