METHOD OF CONCENTRIC ANGULAR FORMING OF BARREL- OR CUP-TYPE PARTS Russian patent published in 2012 - IPC B21J13/02 B21K21/02 

FIELD: process engineering.

SUBSTANCE: invention relates to metal forming and may be used in hammer shops for production of hollow parts. Die for concentric angular forming comprises outer container with opening mounted on press table, said opening accommodating mandrel, inner container with through channel, and driven male die. Mandrel is secured on press table. Inner container is arranged inside pouter container to displace axially and make axially symmetric impression between its end face and mandrel end face. Inner container may be pressed against thrust. Note here that thrust vertical position may be adjusted relative to press table and locked at said position by appropriate structural element.

EFFECT: optimum metal structure of finished article.

4 dwg, 2 ex