Electrode for resistance spot welding of aluminum sheet
AssigneeBayerische Motoren Werke Aktiengesellschaft
InventorsDietmar Mueller, Nikolaus Gschossmann, Norbert Donath, Franz Schubert
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Abstract
For welding conductive materials, using conventional copper electrode caps, with a long service life of the welding tool, a foil section is provided between the electrode cap and the surface of the sheet. The foil section is part of a foil strip which is displaceable relative to the electrode cap, and consists of a material with a high nickel content, while silver or a silver metal oxide is provided as a material in the contact area between the electrode cap and the foil section. The electrode cap is preferably coated with this material.
Claims12
A device for resistance spot welding of a conductive material, comprising:
- first and second electrodes having respective electrode caps disposed opposite each other to form a gap for receiving said conductive material;
- and
- a foil section disposed across at least one of said electrode caps, said foil section being displaceable relative said electrode cap, wherein
- said foil section comprises a material with a high nickel content;
- and
- said electrode cap comprises a copper alloy material which is coated with a material selected from the group consisting of silver and silver oxides.
A device for resistance spot welding of a conductive material, comprising:
- first and second electrodes having respective electrode caps disposed opposite each other to form a gap for receiving said conductive material;
- and
- a foil section disposed across at least one of said electrode caps, said foil section being displaceable relative said electrode cap, wherein
- said foil section comprises a material with a high nickel content;
- and
- said electrode cap has an insert for contacting the foil section, which insert is made of a material selected from the group consisting of silver and silver metal oxides.
A method of resistance spot welding of a conductive material using a welding device comprising first and second electrodes having respective electrode caps which are disposed opposite each other to form a gap for receiving said conductive material, said method comprising:
- displaceably positioning a foil section across at least one of said electrode caps for contacting a conductive material to be spot welded, said foil section comprising a material with a high nickel content;
- and
- providing said electrode cap in the form of a copper alloy material which is coated with a material selected from the group consisting of silver and silver oxides.
A method of resistance spot welding of a conductive material using a welding device comprising first and second electrodes having respective electrode caps which are disposed opposite each other to form a gap for receiving said conductive material, said method comprising:
- displaceably positioning a foil section across at least one of said electrode caps for contacting a conductive material to be spot welded, said foil section comprising a material with a high nickel content;
- and
- providing said electrode cap with an insert for contacting the foil section, said insert being made of a material selected from the group consisting of silver and silver metal oxides.
Dependencies are inferred from the claim text.