Metal deforming – By use of closed-die and coacting work-forcer – Forcing work into or within closed die; e.g. – forging
Patent
1974-09-16
1976-02-24
Mehr, Milton S.
Metal deforming
By use of closed-die and coacting work-forcer
Forcing work into or within closed die; e.g., forging
B21D 2230
Patent
active
039396851
ABSTRACT:
A mechanism for centering metal hollow bodies during a drawing operation is disposed in front of a die of an ironing tool. The metal hollow bodies each have a flared section along the edge zone of its open face. The mechanism comprises at least two centering-cheeks adapted to the circumference of the metal hollow body. The centering-cheeks are movably supported for sliding movement within a plane extending transversely to the tool axis and in any direction towards or away from the tool axis. Mechanical control means effect periodic opening motion of the centering-cheeks in any direction away from the tool axis in dependence upon the motion of a draw punch. The control means are effective to cause the two centering-cheeks to embrace the hollow body centeringly after it has been thrust into the die by the draw punch and at at least a fraction of its overall height. The control means includes means for withdrawing the centering-cheeks away from the hollow body at a time just before the flared section passes thereby and by at least the radial dimension of the flared section from the circumference of the hollow body.
REFERENCES:
patent: 2731860 (1956-01-01), Schaming
patent: 2851980 (1958-09-01), Kralcinski
KM Engineering AG
Markva Neil F.
Mehr Milton S.
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