Metal deforming – By use of closed-die and coacting work-forcer – Forcing work into or within closed die; e.g. – forging
Patent
1982-10-04
1984-08-21
Gilden, Leon
Metal deforming
By use of closed-die and coacting work-forcer
Forcing work into or within closed die; e.g., forging
72358, 7245308, B21D 2200
Patent
active
044662661
ABSTRACT:
A forging press for producing flashless forgings from metal billets or pre-forms has a die-head (26) slidably mounted in a press-head (10) whereby it may retract into the press-head if a predetermined pressure on the die-head is reached or exceeded during the forging stroke. The die-head (26) is slidably mounted in a bore (30) containing hydraulic fluid and connected via conduits (38) and pressure relief valves (40) to a hydraulic reservoir (32). A die cavity for the billet or pre-form is defined between relatively movable die halves (16) and (18).
REFERENCES:
patent: 3839896 (1974-10-01), Hamada
patent: 4051708 (1977-10-01), Beane et al.
Gardner Robert M.
Thompson Ronald L.
Gilden Leon
GKN Forgings Limited
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