CONTACT SPOT WELDING ELECTRODE Russian patent published in 1995 - IPC

FIELD: welding, in particular, production of welded constructions from sheet metal, including coated constructions. SUBSTANCE: electrode has working part with variable diameter along the whole length. Diameter variation law is chosen to provide sufficient stability of working part at minimum increment of diameter per length unit. Such shape of working part allows welding current to be reduced and as a result overheating of metal proximate electrode contact surface zone to be decreased. EFFECT: increased service life and elimination of necessity for additional maintenance by optimized shape and size of electrode working part. 1 dwg