Metal deforming – By three or more coacting relatively movable tools – Concurrently actuated tools
Patent
1986-07-11
1987-11-03
Crane, Daniel C.
Metal deforming
By three or more coacting relatively movable tools
Concurrently actuated tools
72434, B21D 4104
Patent
active
047036435
ABSTRACT:
The present invention relates to a machine for crimping a workpiece. The machine of the invention comprises a bed plate, a conical shaped bowl adjacent the bed plate, and a ram reciprocal substantially upward and downward along an axis toward and away from the bowl. A crimping die assembly comprising a plurality of circumferentially disposed die fingers attached to a die retaining ring is disposed adjacent to the bowl for receiving a workpiece. A driving means is provided for advancing the ram toward the die assembly, and a pusher assembly comprising a single pusher ring is provided to transmit the forces of the ram to the die assembly. The driving means has a variable length stroke, and the length of the stroke is controlled by matching a reference voltage with a comparative voltage on a balancing circuit. The diameter of the circle embraced by the die fingers is correspondingly reduced as the die fingers are advanced into the conical shaped bowl. An improved die assembly and a method of using the crimping machine of the invention are also provided.
REFERENCES:
patent: 3080779 (1963-03-01), Buchalter
patent: 3093182 (1963-06-01), Vanderhoof
patent: 3276238 (1966-10-01), Erdmann
patent: 3736788 (1973-06-01), Olive-Jones et al.
patent: 3762209 (1973-10-01), Herndon et al.
patent: 4285228 (1981-08-01), Gunning
patent: 4306442 (1981-12-01), Schrock
patent: 4550587 (1985-11-01), Eisenzimmer
Brooks Thomas W.
Fox James D.
Malecka Joseph R.
Masseth David A.
Pearson Charles S.
Crane Daniel C.
Dayco Products Inc.
Tassone Joseph V.
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