Electrode for resistance spot welding of aluminum sheet

摘要

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.