Abstract: A device for removing external circular fins from pipe joints comprising a base, a hollow rotor with a faceplate mounted in the base, carriages located on the rotor faceplate, a mechanism for radial traverse of the carriages, having a holder rotatably fitted on the rotor, and a drive for the rotor and the mechanism for traversing the carriages. Each of the carriages is provided with a roller adapted to trace over the surface of the pipes being treated, while the mechanism for radial traverse of the carriages is composed of links with one of their ends articulated to the holder and with the other end to slide blocks, each of which is housed in a bore in the respective carriage with the possibility of radial movement therein and is connected to a spring gauged for the cutting force, the other end of which spring thrusts against the bottom of the carriage bore.

Abstract: The machine disclosed is provided with a manipulator which aligns and moves pipes in course of welding and incorporates a hollow rod for the movement of the manipulator relatively to the pipe joints. The rod is immovably attached to the body of the manipulator and is provided with a partition subdividing the rod bore into two spaces. One of the spaces is intended to be filled with a working fluid and the other accommodates on the partition a hydraulic system for feeding and controlling both actuators of pipeholding clamps and a means for moving the pipes in the course of welding, the means comprising hydraulic cylinders whose bodies are immovably attached to the body of a movable aligning unit between hydraulic cylinders which are mounted on the unit to actuate the clamps holding fast one of the pipes being welded whereas piston rods of the hydraulic cylinders that move the pipes are immovably attached to the body of the manipulator insulated electrically from an immovable aligning unit.