FIELD: mechanical engineering. SUBSTANCE: apparatus has welding electrodes made in the form of fixed current-conductive jaw secured on body and electrically insulated from movable jaw, which is mounted on double-arm lever. Current-conductive jaw is positioned in front of lugs to be welded. Heat-exchange transportation cart with length adjustable in accordance with article length is provided with carriages having support and drives for discrete moving of carriage and cart. Drives are provided with motion value control sensors of photoimpact type. EFFECT: increased efficiency and enhanced reliability in operation. 2 cl, 6 dwg
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