DEVICE FOR SEAM RESISTANCE WELDING OF BELLOWS Russian patent published in 1997 - IPC

FIELD: welding equipment, in particular, machines for roll-seam welding, applicable for welding of bellows and similar items. SUBSTANCE: the device has a bed with a base, clamp with a rotation drive, two guides, two carriages, spring-loaded one relative to the other by an extension spring, welding and supporting rolls; cam and stops installed on the carriages. The device is furnished with an additional extension spring, pins and strips. Holes are successively arranged on the strips. The strips are linked with the ends of the extension springs and conjugate by means of the holes to the pins installed on the carriages. The clamp is made in the form of a vertically arranged spindle with a central axial cylindrical hole, in which a pressure screw is radially installed for fixing the appliance with the bellows parts to be welded secured on it. The guides are made in the form of two rods secured on the base. The cam represents a large-diameter ring with two diametrically arranged external working surfaces in the form the Archimedean spiral. The stops are made in the form of rollers. EFFECT: expanded technological capacities, improved conditions for servicing. 4 dwg