Metal deforming – By use of closed-die and coacting work-forcer – Forcing work into or within closed die; e.g. – forging
Patent
1985-12-13
1987-08-11
Larson, Lowell A.
Metal deforming
By use of closed-die and coacting work-forcer
Forcing work into or within closed die; e.g., forging
72359, 72377, B21J 506
Patent
active
046853235
ABSTRACT:
In accordance with the present invention, there is provided a method for increasing the longitudinally compressive and tensile proportionality limits and ultimate strengths of an elongated structural member by applying to the member a longitudinally compressive load. To increase the proportionality limits of the member, a longitudinally compressive load is applied to the member which is close to its maximum load. In order to prevent buckling of the member under such a load, the member is confined in an encasement which allows the member to yield longitudinally without bending. By applying to the member a longitudinally compressive load much greater than the member's original (i.e., untreated) ultimate compressive strength, both the ultimate strengths and the proportionality limits of the member are increased. In addition, application of a longitudinally compressive load close to or greater than the original ultimate compressive strength of the member also increases the straightness of the member and frees the member of residual stresses.
REFERENCES:
patent: 724270 (1903-03-01), Ehrhardt
patent: 812856 (1906-02-01), Loss
patent: 1571737 (1926-02-01), Schanandoah
patent: 2178141 (1939-10-01), Frame
patent: 2755545 (1956-07-01), Moore
patent: 3224243 (1965-12-01), Van Deberg
patent: 3328996 (1967-07-01), Pon et al.
patent: 4028926 (1977-06-01), Olesovsky
patent: 4179915 (1979-12-01), Huydts
patent: 4218908 (1980-08-01), Frantz et al.
patent: 4364251 (1982-12-01), Nishihara
Grotnes Metalforming Systems, Inc.
Larson Lowell A.
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