UPPER DIE PRESSER DEVICE FOR ROTARY FORGING MACHINE

摘要

PURPOSE:To provide the titled upper die presser device which performs satisfactory rotary forging without defects such as laps, etc. by making the upper die presser of a rotary forging machine freely rotatable with a play at the center of the axial line of said upper die presser. CONSTITUTION:An upper die presser 2 is moved to make precession in which the central axial line has the angle theta rotating D by passing through the axial center 12 of a rotary forging machine in rotary forging, by which the tooth profile or the like of a bevel gear is forged. The blank material 14 inserted into the hole form 8 of a lower die 7 is subjected to rotary forging by the presser 2 making such precession, by which the satisfactory forging having no defects such as laps, etc. in, for example, the tooth part is manufactured.