DIE SET FOR MULTIPIECE FORGING Russian patent published in 1994 - IPC

FIELD: metal pressure forming. SUBSTANCE: die set has upper and lower plates with preliminary and final grooves. A blank, had been deformed in the preliminary grooves, is being deformed in the final grooves, whose separate cavities are made with successive alternation in the upper and the lower plates. Generatrix of lateral surfaces of adjacent cavities of the final groove, laid in a common symmetry plane, normal to the die connection line, are displaced one relative to another by a distance no more, than a width of a fin pass jump. Each separate cavity of the final groove on the connection surface is displaced to the opposite half of the die by a distance, equal to a half-width of the fin pass jump. EFFECT: enhanced efficiency. 1 cl, 2 dwg