MATRIX FOR UPSETTING PARTS WITH COMPLEX SHAPE Russian patent published in 2015 - IPC B21J13/02 B21J5/08 

FIELD: metallurgy.

SUBSTANCE: matrix for upsetting contains insert and shroud ring. The insert is pressed in the shroud ring with variable tension through height of the shroud ring or insert. The mating external surface of the insert and internal surface of the shroud are made cone. The variable tension between these surfaces is created by their making with various differences between the ring internal diameter and outside diameter of the insert at opposite ends of the matrix. The variable tension Δ is selected based on expression: Δ = Δ1-Δ2 = (0.02…0.34) mm, where Δ1 is tension between the mating surfaces of the insert and shroud ring from side of the matrix mirror, Δ2 is tension between the mating surfaces of the insert and shroud ring from side of the matrix end face opposite to the matrix mirror.

EFFECT: increased cyclic resistance and strength of the matrix, increased its production effectiveness.

2 dwg