Cutting – Processes
Patent
1988-11-29
1990-04-03
Phan, Hien H.
Cutting
Processes
83 55, 83685, 83686, 83693, 83824, 83917, 184 5, 384 12, B26D 314, B26F 112
Patent
active
049130129
ABSTRACT:
A high-precision punch and die method wherein a pair of pneumostatic bearings are mounted on a rigid frame structure in registered spaced-apart relation to each other, each bearing having a plurality of journal segments provided with a pneumostatic bearing surface and adjustably mounted on the frame structure. A segmented die is mounted on the frame structure in registered spaced-apart relation to (and preferably between) the two bearings, the die having a plurality of die segments provided with a cutting edge and adjustably mounted on the frame structure. The bearing journal segments and the die segments are adjusted, by use of a mating set-up bar, to achieve required sizing and alignment of the bearings and die. A punch is then positioned in the bearings for guided movement through the die, the punch having an integral pneumostatic bearing surface closely facing each journal-segment bearing surface and a cutting edge adapted to coact with each die-segment cutting edge. A pressurized gas, preferably air, is controllably supplied to each journal-segment bearing surface to provide needed constraint and guidance to the punch. The punch is then moved, as by a pneumatic cylinder, through the bearings and die to bring the punch and die cutting edges into precise coaction.
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Dixon William C.
Eastman Kodak Company
Phan Hien H.
LandOfFree
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