Spherical pre-forging die for small heads of crankshafts



The invention discloses a spherical pre-forging die for small heads of crankshafts. The spherical pre-forging die mainly comprises an upper die, a lower die and a small head cavity located between the upper die and the lower die, wherein a flash gutter comprising a flash land part and a flash cavity part is arranged on the periphery of the cavity; the small head cavity is spherical, so that a forging material flows reasonably, the cavity is filled, then the material consumption is reduced, the material utilization rate is increased, small head wrinkles are eliminated, the forging percent of pass is increased, and the production benefit is maximized.




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