DRAWING DIE FOR HOLLOW PARTS WITH VARIABLE WALL THICKNESS HEIGHT Russian patent published in 2019 - IPC B21D22/28 

FIELD: technological processes.

SUBSTANCE: invention relates to metal forming, particularly, to die tooling for production of hollow parts with variable wall thickness by height by means of alignment of drawing operation with thinning and extrusion. Die comprises upper plate with puncheon holder, bottom plate, on which female drawing die, spring-loaded remover are installed. In addition, cam plates and guide columns are secured on lower plate to accommodate intermediate plate with guide bushings. Matrix for extrusion is arranged on lower intermediate plate coaxially with female drawing die, and on upper plate male die holder comprises composite male die consisting of working part and shank end. On upper plate there are also fixed rotary L-shaped stops having cavity contacting under action of springs with intermediate plate and cams entering into cavity of L-shaped stops.

EFFECT: enlarging the dies technological capabilities due to the end face support provision.

1 cl, 2 dwg