Metal deforming – By use of closed-die and coacting work-forcer – Forcing work into or within closed die; e.g. – forging
Patent
1995-11-20
1997-08-19
Jones, David
Metal deforming
By use of closed-die and coacting work-forcer
Forcing work into or within closed die; e.g., forging
72361, 72420, B21D 2200, B21J 1310
Patent
active
056576633
ABSTRACT:
The invention provides a multi-stage forging apparatus for forging a work in transportation through a plurality of forging stations each provided with a die and a punch so that the work is progressively refined, in which the position of the work is changed during the forging procedure. A work, for example, consisting of a shank and a ring-shaped head can be produced. The forging apparatus includes a position change station having a rotation unit instead of a die. The rotation unit contains a pair of rotation bodies with gears. The gears are engaged with racks rotated synchronously with the movement of a crank shaft. When an intermediate work consisting of a shank and a ball-like head is driven into a space between the rotation bodies, the rotation bodies are rotated so as to shift the intermediate work to a vertical position where the shank extends perpendicularly to the driving direction of a punch, and the vertically positioned intermediate work is pushed out of the rotation unit by a knockout pin.
REFERENCES:
patent: 3587157 (1971-06-01), Mundt
patent: 3889512 (1975-06-01), Delio
patent: 4227394 (1980-10-01), Heimel
patent: 4378688 (1983-04-01), Spanke et al.
patent: 4463587 (1984-08-01), Werner
patent: 4932251 (1990-06-01), Okada et al.
Ikeda Hiroshi
Miyahara Hiroshi
Butler Rodney A.
Jones David
Kabushiki Kaisha Sakamura Kikai Seisakusho
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