METHOD OF MANUFACTURING SPHERICAL VESSELS Russian patent published in 1994 - IPC

FIELD: production of spherical vessels. SUBSTANCE: method involves initially obtaining workpieces of middle part and of two bottoms; connecting workpieces one with the other to obtain bulky semi-finished product and expanding it from inside; with workpieces of middle part and two bottoms being composed of twenty six members in the form of squares and scalene triangles in the quantity of 18 and 8 respectively and side length equal to l=0.715 of vessel sphere radius R; effectuating bending along lines of conjugation and connecting joint zones by welding. Three variants of flat workpieces are available for obtaining bulky semi-finished product, that is: common workpiece for middle part and two bottoms, usage of two square members for two bottom workpieces and remaining member for middle part workpiece, usage eight square members for middle part workpiece and remaining members for two bottom workpieces. EFFECT: increased efficiency and enhanced reliability in operation. 3 cl, 6 dwg