METHOD OF MAKING SHELLS FROM SHEET BLANK Russian patent published in 2025 - IPC B21D26/02 B21D51/02 

FIELD: metal forming.

SUBSTANCE: invention relates to metal forming and can be used for production of shells from sheet billet by hydrostatic pressing with the help of viscous-fluid medium. Die is made up of working chamber, male die and female die assembly made up of female die with cavity and holder. Viscous-liquid medium is poured into the working chamber; the punch is heated up to the workpiece shaping temperature and the shell is formed with the viscous-liquid medium. Die is cooled to transfer of viscous-liquid medium into medium hardened to shape of inner cavity of finished shell with provision of its fixation on puncheon end. Then finished shell is removed. Molding of next shell is performed at die heating to forming temperature with transition of solidified medium located at male die face to viscous-fluid medium.

EFFECT: expanded processing performances for obtaining shells of complex shape on standard press equipment is provided.

1 cl, 3 dwg