Metal deforming – With means to drive tool – Including pneumatic- or fluid-actuated tool support
Patent
1986-09-26
1988-03-22
Spruill, Robert L.
Metal deforming
With means to drive tool
Including pneumatic- or fluid-actuated tool support
72344, 267119, 267122, 267130, B21D 2402
Patent
active
047320338
ABSTRACT:
A pneumatic die cushion for use in a power press is the subject matter of this invention. The die cushion includes a pair of spaced substantially parallel plates with resilient bellows for resiliently spacing apart the plates. A plurality of limiter pins are releasably secured to one of said spaced plates. Each of said limiter pins has an end threadedly mounted in one of said plates. Each of said limiter pins is movable relative to the other of said plates. A stop mechanism is mounted on the other end of each limiter pin for limiting movement of the first mentioned plate away from the other plate. A limit sleeve is mounted on each of the limiter pins to control the minimum spacing between the plates. A quick change adaptor plate is fixed to one end of the bellows. The quick change adaptor plate has a pair of opposed ears. A mechanism is provided to releasably secure the ears of the quick change adaptor plate to said one of said plates to secure said one end of the bellows to said one of said plates. A second quick change adaptor plate is fixed to the other end of the bellows. The second quick change adaptor plate also has a pair of second opposed ears. A second mechanism releasably secures the second ears of the second quick change adaptor plate to the other of the spaced plates to secure the other end of the bellows to the other of the spaced plates.
REFERENCES:
patent: 2878012 (1959-03-01), Crites
patent: 3295846 (1967-01-01), Robertson
patent: 3488045 (1970-01-01), Balunas, Jr. et al.
patent: 3511491 (1970-05-01), Kraft
patent: 3667707 (1972-06-01), Mui
patent: 3989232 (1976-11-01), Steinbach et al.
patent: 4597475 (1986-07-01), Lassig et al.
Bozich George J.
Kotynski Robert J.
Smedberg Kenneth L.
Jones David B.
Smedberg Kenneth L.
Spruill Robert L.
Zummer Anthony S.
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