Press true-hit safety counter
AssigneeFiran Electronics, Inc.
InventorsKlaus Hermann Mette, Andrew Raoul St. Denis
Life of this patent
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Abstract
A counter device is described for counting workpieces produced by stamping or blanking on a power press of the type having a ram powered by a flywheel through a clutch and crankshaft with the flywheel being powered by an electric motor. The counter is arranged to count only workpieces actually produced and operates by detecting cyclic enegy losses of the flywheel during the actual production of a workpiece.
Claims17
A workpiece counter for a power press having a press bed and a reciprocating ram powered by a flywheel through a clutch and crankshaft with said flywheel being powered by a rotary power source, said workpiece counter comprising (a) means for calculating the energy of the flywheel and associated moving components based on the rotational speed of the flywheel for small increments of each revolution thereof, (b) means for calculating any energy loss of the flywheel between small increments of each revolution of the crankshaft, (c) means for determining the maximum incremental energy loss during each revolution of the crankshaft, (d) means for comparing said maximum incremental energy loss against a predetermined value and (e) a counting device which is activated each time said maximum incremental energy loss exceeds said predetermined amount.
Dependencies are inferred from the claim text.