FIELD: mechanical engineering, shipbuilding, aircraft construction. SUBSTANCE: outside tool is in the form of yoke mounted on bottom plate. The yoke has fixed die and movable die put on the same axle without clearance. Movable die has projections on its outer diameter and is mounted for rotation and return to its initial position. Mandrel is in the form of set of coaxial flexible bushing and gaskets located between face surfaces of adjacent bushings. Gaskets can be made from polyethylene. EFFECT: enhanced operating capability. 2 cl, 1 dwg
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