APPARATUS FOR EXPANDING HOLLOW ARTICLES Russian patent published in 1998 - IPC

FIELD: plastic metal working, namely apparatuses for deforming end portions of tube blanks, mainly in machine engineering for making axially symmetrical flared portions of tubes. SUBSTANCE: apparatus includes rod with two cones. One of cones is fixed to end of rod, another cone is mounted on rod with gap. Apparatus also includes sectionized punch arranged between cones and spring-loaded in direction crossing axis of rod. Said fixed cone has at side of its large base shaping member. Pusher is mounted in front of shaping member. Second cone is connected with rotation drive mechanism. Contacting surfaces of cones and sectionized punch are provided with splines. At least one rolling out roller is mounted at outer side of punch. Apparatus allows to increase deformation degree of tube without breaking it. EFFECT: enlarged manufacturing possibilities at shaping tubular blanks. 2 dwg