Finishing die for die forging process of forged pieces with internal flash

摘要

The present invention relates to a device for closed-die forging of forgings with internal flash comprising a pre-forging die (11) and a finishing die (12), consisting of upper die portions (3, 4) and bottom die portions (2, 5), wherein a central pin (6, 8) is performed on at least one of said upper and bottom die portions (2, 3, 4, 5) (6, 8). Said central pin (6) upper portion (4) and/or bottom portion (5) of the finishing die (12) is lower than the height of the central pin (8) on the upper portion (3) and/or bottom portion (2) of the pre-forging die (11) forming thus in the finishing die (12) a free space (9) intended for injection of excess material (10) of a blank from the pre-forging die (11).