Cutting – Operation of member controlled by means responsive to... – With means to initiate operation of member
Patent
1974-03-05
1976-02-10
Meister, J. M.
Cutting
Operation of member controlled by means responsive to...
With means to initiate operation of member
83564, 83588, 83590, B26D 516
Patent
active
039371131
ABSTRACT:
A press frame includes upper and lower arm portions forming a recess therebetween for receiving a workpiece that is supported by a worktable mounted on the lower arm portion. A ram housing is supported at the front of the upper arm portion and is provided with a ram punch connected to a power source for reciprocating the ram toward and away from the worktable. A swing arm is connected to the upper arm portion in the recess of the press frame by a vertical shaft and is arranged to pivot in a horizontal plane with respect to the upper arm portion with the shaft. A tool holder is releasably engaged to the end of the swing arm by a locking device and is provided with a vertical bore for receiving a punch tool. A cooperating die is supported in the worktable, and when the tool holder and the swing arm are positioned in punching position, the punching tool is vertically aligned between the ram and the die so that the tool holder vertically guides the punch tool toward and away from the die as the ram delivers an impact blow to the punch tool. A fluid actuated device rigidly retains the swing arm and the attached tool holder in punching position with respect to the die. When the swing arm is locked in punching position, the punch circuit is completed and thereafter is selectively energized either manually or automatically to initiate a punching stroke of the ram. To facilitate a tool and die change, the fluid actuated device operably releases the swing arm from engagement with the upper arm portion permitting the swing arm to pivot laterally in a horizontal plane out of punching position. The punching apparatus is rendered inoperable until the swing arm is returned to punching position with the die.
REFERENCES:
patent: 931431 (1909-08-01), Kilgore
patent: 2892500 (1959-06-01), Baron et al.
patent: 3039344 (1962-06-01), Herick
patent: 3174378 (1965-03-01), Friedland et al.
patent: 3225636 (1965-12-01), Schott et al.
patent: 3234839 (1966-02-01), Smeets
patent: 3638523 (1972-02-01), Yasuda et al.
patent: 3745646 (1973-07-01), Kristiansson
Pancook James J.
Weisbeck Ralph L.
Meister J. M.
Price, Jr,. Stanley J.
Silverberg Fred A.
Unipunch Products, Inc.
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