High-energy rate forging machine

Details High-energy rate forging machine High-energy rate forging machine

1976-08-24

1978-08-08

Lanham, C.W.

Metal deforming

With means to drive tool

With stored-energy means to retract tool

7245318, 91399, 91416, B21J 724

Patent

active

041049047

ABSTRACT:
In a high-energy rate forging machine the piston, to which a ram is attached, is driven towards a workpiece by a high pressure gas supplied to the space above the piston within a cylinder. The space above the cylinder and the space below the cylinder are joined by holes in the cylinder and grooves in the cylinder walls. The grooves are only effective when the piston is at about the middle to lower part of its stroke. They are blocked when the piston is at or near the top part of its stroke. High speed stamping is provided without double or triple stamping and with a smooth return stroke of the piston.

REFERENCES:
patent: 2807081 (1957-09-01), Black
patent: 3469400 (1969-09-01), Oikawa

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