Metal deforming – By use of closed-die and coacting work-forcer – Forcing work into or within closed die; e.g. – forging
Patent
1988-07-01
1990-04-10
Larson, Lowell A.
Metal deforming
By use of closed-die and coacting work-forcer
Forcing work into or within closed die; e.g., forging
72452, B21J 1302
Patent
active
049149385
ABSTRACT:
According to the present invention, there is provided a full enclosed die forging apparatus having an upside die and an underside die disposed opposedly in a vertical direction between a slide and a bolster. There is an upside cylinder mechanism contained in the slide which urges the upside die downward. There is an underside cylinder mechanism contained in the bolster which urges the underside die upward. An upside punch is inserted in the upside die and moves synchronously with the movement of the slide. An underside punch is inserted into the underside die and is supported by the bolster. A die moving mechanism having a support member is positioned between the underside die and the underside cylinder mechanism. A push pin is adapted to move synchronously with the slide. There is a cam mechanism that moves with the support member causing both punches to rush into the dies, respectively, by moving the upside die and underside die toward the underside punch at a speed slower that the moving speed of the slide.
REFERENCES:
patent: 4653310 (1987-03-01), Urata et al.
Aida Engineering Ltd.
Larson Lowell A.
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