Metal deforming – By use of closed-die and coacting work-forcer – Forcing work into or within closed die; e.g. – forging
Patent
1978-10-13
1981-11-10
Larson, Lowell A.
Metal deforming
By use of closed-die and coacting work-forcer
Forcing work into or within closed die; e.g., forging
72344, 72352, 72358, 291592, B21D 4502
Patent
active
042991129
ABSTRACT:
A planar blank material to be press-formed is confined in a space formed by punch means having peripheral flange part provided with gear teeth corresponding to those of the hollow product, a mandrel provided slidably in the central hole of said punch means and having outer diameter corresponding to the inner diameter of the hollow product, and a die means having bottom surface and through hole having inner contour corresponding to the outer contour of the boss part of the product. By the pressing action, the peripheral flange part having teeth of the product is formed and simultaneously boss part of the product is formed whereby the synchronizer ring product is formed by one step and the blank material corresponding to the through hole of the product and the product are both ejected out by returning the punch means, mandrel, and die means.
REFERENCES:
patent: 2726560 (1955-12-01), Roux
patent: 3048063 (1962-08-01), Chatfield
patent: 3149416 (1964-09-01), Moore
patent: 3370450 (1968-02-01), Scheucher
patent: 3535762 (1970-10-01), Taylor
patent: 3675459 (1972-07-01), Dohmann
patent: 3731516 (1973-05-01), Dohmann et al.
patent: 3832763 (1974-09-01), Schober
patent: 3842646 (1974-10-01), Kuhn
A.P.C. 191,168 Singer published Apr. 27, 1943.
Kondo Kazuyoshi
Nakamura Yoshiaki
Kabushiki Kaisha Wako
Larson Lowell A.
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