Butt-welding device

A butt welding device for welding the ends of strip material movable along a path of travel, comprising a bed, a feed side frame mounted on the bed for reciprocal movement along the direction of said path of travel, strip clamping means mounted on a discharge side of the frame, a box-shaped frame mounted on said bed and movable transversely of said path of travel, a shear unit mounted on said box-shaped frame for cutting off the ends of the strips to be welded, an electrode unit mounted on the box-like frame to clamp the strips and butt weld them together, said strip clamping means including two pairs of opposed clamping devices for respectively clamping adjacent ends of a pair of strips, said box-shaped frame being movable to bring the shear unit into position to shear the clamped ends of the strips, means for moving the box-shaped frame to another position to move said electrode unit in position to butt weld the ends together, a flash trimmer unit mounted on said box-shaped frame and adapted to remove the flash formed along the joint between the strips, a rapid displacement cylinder mounted on said bed for moving the first named frame toward said electrode unit, and an upset cylinder mounted on said bed for applying upset pressure to the strips during butt welding.