NONSYMMETRICAL FORMED SECTION MANUFACTURING METHOD Russian patent published in 1995 - IPC

FIELD: plastic working of metals. SUBSTANCE: method involves turning second wall of section, beginning from peripheral bending portion, whose final bending angle is part of right-hand portion of nonsymmetric zone, in technological forming transition parts relative to apex of third bending portion, beginning from bending portion whose final bending angle is part of right-hand portion of nonsymmetric zone, in the direction of bending strip of section mated with fourth bending portion, beginning from bending portion, whose final angle makes right-hand part nonsymmetric zone, till final angle of turning is obtained in final technological forming transition part, with final angle of turning being calculated by formula recited in Specification. EFFECT: increased efficiency in obtaining nonsymmetrical formed sections of tray type articles. 6 dwg, 2 tbl