Power hammer with opposed movement of ram and bolster

Details Power hammer with opposed movement of ram and bolster Power hammer with opposed movement of ram and bolster

1978-07-11

1980-03-04

Husar, Francis S.

Metal deforming

With means to actuate both elements of tool-couple

7245318, B21J 722

Patent

active

041910451

ABSTRACT:
A power hammer with opposed movement of a ram and a bolster. The hammer has a stationary main frame accommodating, with provision for vertical displacements, a power frame. A bolster supporting a blank is attached to the power frame. Also, attached to the power frame is an actuating cylinder provided with a space above its piston serving as a gas chamber, a space below its piston filled with a fluid, and a piston rod carrying a ram with a top die. The hammer also incorporates a mechanism for accelerating the power frame by an additional force equal to, or exceeding by a specified amount, its weight. The mechanism includes spaces provided in the lower portion of the power frame and communicating with the space below the piston of the actuating cylinder, as well as vertical plungers extending inside each of the lower portion spaces and resting on the main frame. An arrangement like this one allows employing the hammer for forging components of various type and size by making use of blow energies varying over a substantially wide range.

REFERENCES:
patent: 2655002 (1953-10-01), Terhune
patent: 3429174 (1969-02-01), Fracke
patent: 3552181 (1971-01-01), Chan
patent: 3596499 (1971-08-01), Sauerbrey
patent: 3780560 (1973-12-01), Zimmer
patent: 3822579 (1974-07-01), Kononenko
patent: 3847008 (1974-11-01), Schmoll
Innovations in Impact Forging Equipment, by V. F. Scheglov, Moscow, 1968, pp. 198-201.

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