METHOD OF FORMING THIN-PIECE FORGED PIECE Russian patent published in 2020 - IPC B21K1/76 B22D18/02 

FIELD: metal forming.

SUBSTANCE: invention relates to metal forming and can be used in production of items from aluminium alloy with element in the form of thin cloth in form of rectangular trapezoid, having variable thickness. Heated cylindrical billet is installed in heated die containing male and two half-dies with vertical plane of detachment. When semi-matrixes are closed, a cavity is formed, which consists of cylindrical receiver in upper part of closed semi-matrixes and interconnected with it convergent cavity of wedge-like shape for shaping of thin cloth of forged piece. Cylindrical billet in solid-liquid state is installed in receiver, then male die is used for direct extrusion of billet metal into convergent cavity. During extrusion, resistance to metal flow is provided due to continuous increase of its contact area with converging cavity and friction forces growth. Temperature of the die is maintained constant during the whole punching cycle.

EFFECT: result is improved quality of operating characteristics of forged piece and reduced allowances for its machining.

1 cl, 3 dwg