DIE FOR FORGING OF LARGE-SIZE PISTONS Russian patent published in 2015 - IPC B22D18/02 B21K1/18 B21J13/02 

FIELD: metallurgy.

SUBSTANCE: in the initial state the punch 4 of the die for forging of large-size pistons is taken away by the cylinder 6 along guides 5 to extreme position. The locking ring 9 is installed on the end face surface of the matrix bushing 7. The removal ring 8 is installed on the locking ring 9 and fixed in the container 3 by means of a bayonet lock. Thixo work piece 10 heated to thixo forging temperature is installed in the die cavity then by the punch 4 the work piece 10 is deformed to get a piston. By reverse motion of the press the punch 4 is removed from the zone of forging and along the guides 5 the punch 4 is withdrawn in limit position. The bayonet lock is opened and with the pusher 11 the piston is removed together with the removal ring 8 and the locking ring 9 of the array bushing 7.

EFFECT: improved quality of ready item.

2 dwg