METHOD OF METAL PLASTIC STRUCTURE FORMATION AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2016 - IPC B21J5/06 B21J13/02 C21D7/10 C22F1/00 

FIELD: metallurgy.

SUBSTANCE: invention relates to metal forming and can be used in production preparation metal to subsequent operations forming or machining. Blank is subjected to closed plant, piercing with upper end and further reverse extrusion. Upsetting and piercing effect of deforming force on the central part of the top end and back pressure force on the peripheral part. Reverse extrusion is performed in an annular cavity by applying deforming force to the peripheral part of the upper end and back pressure force to its central part. Then closed billet piercing from its lower end face and reverse extrusion in annular cavity is performed. Processing is performed in the device which contains the upper hydraulic cylinder with upper puncheon, lower hydraulic cylinder with lower puncheon and two annular matrices. Holder for two annular matrices is located on the lower hydraulic cylinder.

EFFECT: result is production of blanks with milled homogeneous structure, uniform distribution of dislocations and cured casing defects.

2 cl, 6 dwg