MATRIX FOR PARTS UPSETTING Russian patent published in 2021 - IPC B21J5/08 B21J13/02 

FIELD: metal forming.

SUBSTANCE: invention relates to the field of metal forming and can be used in the manufacture of parts of a complex profile. The matrix for upsetting contains a body and an insert pressed into the body with an interference fit Δ between their mating surfaces, variable along the insert height. There are longitudinal grooves on the inner surface of the insert. Body external diameter De. is less than 10d, where d is the diameter of the insert hole. The body has a blind cavity for pressing the insert. The depth of the cavity is equal to the height of the insert. The ratio between external De. and internal diameters of the case Di. is De./Di.=1.875-1.9. The external diameter of the insert is selected based on the value of the variable interference Δ=Δ1-Δ2=(0.01…0.04) mm.

EFFECT: increase in the cyclic durability and strength of the matrix is ​​provided.

1 cl, 2 dwg