HEAD FOR CONTACT SPOT MICROWELDING Russian patent published in 2003 - IPC

FIELD: welding equipment, namely connection of leads of electronic articles to contact lands of printed circuit boards, circuits and semiconductor materials. SUBSTANCE: on lateral surface of head body there are lugs with grooves for placing electrode assemblies. Each electrode is provided with flexible electric current supply lead. Two electrodes have drives and they are mounted with possibility of radial-axial motion due to movement of upper pins of electrodes along vertical grooves and of their lower pins along vertical-radial grooves. Third electrode is mounted with possibility of axial motion due to movements of its upper and lower pins along vertical grooves. Mechanism for moving electrodes includes system of pushers arranged in guide openings of body and unit for fixing them arranged between electrodes and their drives and having rotating together relative to axis of body supporting, shock absorbing and limiting discs with profiled grooves. Limiting disc has two stops engaging with carriers of electrode drives. EFFECT: improved design, enhanced efficiency of head. 5 dwg