RESISTANCE SEAM WELDER Russian patent published in 1997 - IPC

FIELD: mechanical engineering; welding equipment. SUBSTANCE: device has housing with carriage, carriage travel-motion screw-type mechanism with drive, upper electrode unit with roller electrode, and electrode pressing mechanism. Device has additional inductive weld pitch pickup whose control element is made in form of disk with radial slots over circumference, and controlled element is placed in welding current circuit. Carriage travel motion drive is made in form of electric motor whose shaft is connected through gear train with screw mechanism. Control element is secured on output shaft of gear train. L-shaped bell crank is hinge-mounted on carriage. Roller electrode in secured on one end bell crank. Roller electrode pressing mechanism is made in form of adjustable screw secured on carriage and connected through extension spring with other end of bell crank. EFFECT: improved quality of weld. 3 dwg