| 摘要 |
FIELD: plastic metal working, namely manufacture of nuts and sleeves. SUBSTANCE: method comprises steps of preliminarily cutting blank, feeding liquid to preliminarily formed cavity, closing said cavity by tool for pressing out final cavity during all process of making cavity. Oil buffer is formed between deformed metal and said tool. In zone of said oil buffer deformed metal yields in mode of liquid friction that lowers non-uniformity of deformation in deformation zone and provides maintenance of metal ductility. That is at the same specific pressure upon tool said oil buffer increases deformation degree of blank or at the same deformation lowers specific pressure upon tool, reduces temperature in deformation zone, decreases wear and destruction of tool, at pressing out deep cavities simplifies blank stripping from punch, lowers waste metal volume at opposite (double side) pressing out of cavities for piercing hole, enhances filling of angles at making polyhedrons. EFFECT: lowered contact friction between tool forming cavity and deformed metal. |
