# US 12,179,279 B2 · Method for producing a joining connection between metal sheets

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- Number: US 12,179,279 B2
- Document ID: US12179279B2
- Status: Granted
- Kind: B2
- Application number: 17/909,189
- Filed: 2021-02-26
- Published: 2023-05-11
- Granted: 2024-12-31
- Earliest claimed: 2020-03-04
- Assignees: Magna International Inc.
- Applicants: Magna International Inc.
- Inventors: Jörg Lerch; Stephan Kaufhold; Edward Schleichert
- Web page: https://patentgrep.com/patent/US12179279B2

## CPC

- B23K 1/20: Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
- B23K 1/005: Soldering by means of radiant energy
- B23K 1/008: Soldering within a furnace (B23K1/012 takes precedence)
- B23K 2101/006: {Vehicles}
- B23K 2101/34: Coated articles {; Surface treated articles}
- B23K: SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM

## Abstract

A method for producing a joining connection between at least two metal sheets or at least two components made of hot-workable sheet metal with a scaling-resistant coating, is provided. The method includes at least one step in which a connection is produced between the at least two metal sheets or sheet-metal components by hot-press soldering, wherein the surface of the metal sheets or components to be connected is pretreated in order to break up the coating.

## Claims

### Claim 1

A method for connecting two components made of hot-workable sheet metal, wherein at least one of the components is provided with a scaling-resistant coating on a metal surface, wherein at least one of the components which includes the coating is pretreated in order to form grooves and/or channels in the coating, wherein the grooves and/or channels in the coating extend the entire thickness of the coating down to the metal surface of the component, applying solder to the grooves and/or channels in the coating, and joining the two components with the solder applied to the grooves and/or channels.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the grooves and/or channels of the coating are formed using a mechanical tool.

### Claim 3 (depends on 2)

The method according to claim 2, wherein the tool is a die.

### Claim 4 (depends on 1)

The method according to claim 1, wherein the grooves and/or channels in the coating are formed using a laser.

### Claim 5 (depends on 1)

The method according to claim 1, wherein the coating is broken up only in a subregion which includes the grooves and/or channels and is used for the subsequent connection.

### Claim 6 (depends on 1)

The method according to claim 1, wherein the solder is combined with a flux to form the connection.

### Claim 7 (depends on 1)

The method according to claim 1, wherein the components are fixed to one another by the solder and are then fed to a hot-working process.

### Claim 8 (depends on 1)

The method according to claim 1, wherein energy input for hot working the components is sufficient for soldering the components.

### Claim 9 (depends on 1)

The method according to claim 1, wherein the pretreatment of the at least one component roughens the metal surface of the component in a subregion including the grooves and/or channels in the coating.