Process of forging large seamless ferrous-metal welding necks an

Details Process of forging large seamless ferrous-metal welding necks an Process of forging large seamless ferrous-metal welding necks an

1976-01-19

1978-02-14

Larson, Lowell A.

Metal deforming

By extruding through orifice

With cutting

72267, 72256, 72353, 72358, 72368, 72373, B21C 2300, B21C 2301, B21C 2320, B21C 3504

Patent

active

040731740

ABSTRACT:
Large, heavy-duty, seamless high-pressure resistant ferrous-metal welding necks and other substantially thick-walled cylindrical articles are forged in such manner as to obtain greatly improved quality, dimensionally, metallurgically and otherwise, by the use in sequence of a certain combination of metal-forging elements; which includes a vertically disposed cylindrical female forging die member provided at its bottom with a removable disc and a surrounding circular forging kinfe; an annular metal-working and metal-displacing ring having an external diameter which is slightly less than the bore of the cylindrical female forging die member; a metal-working and metal-displacing disc which interfits with the annular metal-working and metal-displacing ring; a first round forging press follower of a diameter which is adequate to entirely cover the metal-working and metal-displacing disc and a substantial portion of the annular metal-working and metal-displacing ring; a second round forging press follower of a diameter which is slightly less than the internal diameter of the annular metal-working and metal-displacing ring.

REFERENCES:
patent: 1082200 (1913-12-01), Knaebel
patent: 2348179 (1944-05-01), Moore
patent: 2679931 (1954-06-01), Cigliano
patent: 2810478 (1957-10-01), Sejournet et al.

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