Metal deforming – By use of closed-die and coacting work-forcer – Forcing work into or within closed die; e.g. – forging
Patent
1974-10-18
1976-03-02
Larson, Lowell A.
Metal deforming
By use of closed-die and coacting work-forcer
Forcing work into or within closed die; e.g., forging
72356, 72377, 29 6, B21K 108
Patent
active
039409694
ABSTRACT:
An elongated rod is heated and then inserted into a series of axially spaced die sets each consisting of a pair of mating gripping dies defining a plurality of axially spaced cavities. The rod is gripped by the die sets at axially spaced intervals, and the die sets are then forced axially together by actuation of a press to expand portions of the rod into the cavities and thereby form a plurality of axially spaced enlarged bosses on the rod. The rod is bent to form a set of crank arms integrally connected by an axle portion which has two of the axially spaced bosses. Cylindrical surfaces are forged on the two bosses, and one of the bosses is forged into an outwardly projecting sprocket retaining stud.
REFERENCES:
patent: 710245 (1902-09-01), Brooks
patent: 1575427 (1926-03-01), Henry
patent: 2759379 (1956-08-01), Brandt
patent: 3864956 (1975-02-01), Barry
Larson Lowell A.
The Harris-Thomas Drop Forge Company
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