Method and apparatus for performing multiple closed and semi-clo

Details Method and apparatus for performing multiple closed and semi-clo Method and apparatus for performing multiple closed and semi-clo

1984-11-19

1985-10-08

Gilden, Leon

Metal deforming

By use of closed-die and coacting work-forcer

Forcing work into or within closed die; e.g., forging

72477, 72481, B21D 2200

Patent

active

045452326

ABSTRACT:
An apparatus is provided for performing multiple operations on a conventional open-die forge press, and includes a rotatable top punch assembly and stationary bottom die assembly. The top punch assembly includes a mounting fixture secured to the press crosshead, a holder plate rotatably mounted on the fixture, a plurality of punches extending downwardly from the holder plate, and motor means for indexing the punches sequentially into forging position over the bottom die assembly. A method is also provided for making valve pots, including upsetting a heated metal block in a split die and punching a hole through the block, the improvement in which during the upsetting step a vertically reciprocable member is extended so as to close a bottom opening in the split die, in order that the split die will function as a closed die, and during the punching step the reciprocable member is retracted so as to allow a punch-core to fall through said opening. This permits faster production rates since less handling of the dies is required.

REFERENCES:
patent: 2747270 (1956-05-01), Crawford
patent: 3965716 (1976-06-01), Suzuki

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