Railroad spike forging machine

Metal deforming – By use of closed-die and coacting work-forcer – Forcing work into or within closed die; e.g. – forging

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Details

10 57, 10 59, 72356, 72361, B21G 312, B21G 316, B21K 172

Patent

active

044932022

ABSTRACT:
In a railroad spike forging machine of the type comprising a steel stock pointing roller assembly which longitudinally feeds pointed spike blanks along a centerline to a head forming station, a main die of hardened tool steel having a die zone defined between its leading edge and an intermediate point of said first longitudinal dimension, and a wipe zone defined between said intermediate point and the trailing edge of the die by a transversely extending entrance wall surface to the die zone, whereby a transverse wiping of the channel is enabled in said wipe zone. Further, a sensing means generates position signals from the rotation of a pointer roller, and a spike positioning mechanism comprises a first hydraulic cylinder operable transversely to extend a stop mechanism in response to a first position signal, thereby to stop forward motion of a spike blank at an appropriate distance downstream of the die leading edge. A spike ejection mechanism comprises a second hydraulic cylinder operable transversely to extend a side wiping assembly across the wipe zone in response to a second position signal.

REFERENCES:
patent: 576536 (1897-02-01), Barr
patent: 671975 (1901-04-01), Parker
patent: 685477 (1901-10-01), Irwin
patent: 1025670 (1912-05-01), Barr
patent: 1070744 (1913-08-01), Stetter
patent: 1138171 (1915-05-01), Ames et al.
patent: 1582895 (1926-05-01), Berkley
patent: 1774915 (1930-09-01), Crane
patent: 2023636 (1935-12-01), Friedman
patent: 3299451 (1967-01-01), Van De Meerendonk
patent: 4342127 (1982-08-01), Weaver

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