METHOD FOR MAKING THIN-WALL AXIALLY SYMMETRICAL VESSELS Russian patent published in 2002 - IPC

FIELD: manufacture of ultrathin wall envelope parts such as bodies of revolution. SUBSTANCE: method comprises steps of separately forming bottom portion of semifinished vessel; welding by lengthwise seam its cylindrical portion; joining said portions by annular seam; spinning cylindrical portion of blank and simultaneously flattening annular and lengthwise welded seams; at second transition applying onto outer surface of cylindrical portion of vessel lattice formed by mutually crossing grooves while using for such procedure baals of expanding head. EFFECT: enhanced efficiency, high quality of vessels. 5 dwg, 1 ex