| 摘要 |
PURPOSE: To obtain the rotary forging method of thin thickness disk not having material floating from a lower die during forming and not generating underfill and outer peripheral burr in the lower die side of formed bode. CONSTITUTION: In executing forming of a disk by rotary forging, forming dies are set so that a rotating axis of upper die and a revolving axis around the whole die of upper die satisfy the inequality of 0.01<=δ/d<=-0.3, here,δ: a deviation quantity (mm) between a rotating axis of upper die and a revolving axis around the whole die of upper die on the upper face of material in the opposite direction of upper die reduction face, (d): an outer diameter (mm) of thin thickness disk, and then forming is executed.
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