Punch-clamping construction for presses

Details Punch-clamping construction for presses Punch-clamping construction for presses

1983-09-21

1985-03-26

Crane, Daniel C.

Metal deforming

Tool and/or tool holder

Having unitary tool-face

72389, 72462, 403373, 403341, 403384, B21D 3704

Patent

active

045065381

ABSTRACT:
A clamp construction for mounting an elongated punch on a ram of a press including a plurality of rocker arms pivotally mounted on the ram, a plurality of spring units bearing against upper ends of the rocker arms, a movable jaw on the ram in opposition to a fixed jaw, the lower ends of the rocker arms pressing the movable jaw toward the fixed jaw to hold a punch therebetween, and a plurality of hydraulic motor units spacedly mounted lengthwise on the ram for counteracting the force exerted by the rocker arms on the movable jaw to thereby effect the release of the punch held between the fixed and movable jaws.

REFERENCES:
patent: 1465042 (1923-08-01), Hruska
patent: 4315425 (1982-02-01), Zbornik et al.

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