RESISTANCE WELDING ELECTRODE

摘要

A composite resistance spot welding electrode is disclosed which comprises a co-axial annular neck ring, a co-axial insert (542), a co-axial annular sleeve (540), or combinations there of. The electrode provides improved nugget formation and longer electrode life. A composite resistance seam welding electrode is also disclosed which can include a ring, an insert (544), and/or a sleeve (540). A resistance welding machine according to the invention can operate using a reduced current level compared to a conventional machine.