PRODUCTION OF DISC-TYPE AXIALLY SYMMETRIC PARTS Russian patent published in 2015 - IPC B21K1/32 B21H1/02 

FIELD: process engineering.

SUBSTANCE: invention relates to metal forming and can be used for production disc-type parts from multiphase hard-to-strain refractory alloys. Workpiece is heated in the furnace to the temperature corresponding to temperature range of superplastic straining. Workpiece peripheral part is rolled off at superplastic straining made by rolls secured in elongator heads. Forming surface of the rollers is heated to the temperature not lower than that of crack formation on workpiece surface. Rolling-off is performed in the furnace space free of heaters wherein elongator heads are fed to the workpiece. Extending furnace is used provided with the shutter or permanent cutout provided with the shutter. Shutter opening amount is defined proceeding from the maintenance of workpiece temperature not falling beyond aforesaid temperature range of superplastic straining. Rolls are heated with the help of heated workpiece heat radiation.

EFFECT: higher stiffness of elongator heads, hence, higher precision of part production.

7 cl, 2 dwg