Patent ID: 6550241
Filing Date: 2003-04-22
Classification: B21D,F15B

Abstract:
A fluid-operated circuit in a punching machine for setting a top dead center location and a bottom dead center location of a punch actuation cylinder having a plunger slidable in a chamber thereof, the circuit comprising:a first copying distributor means for distributing pressurized fluid; at least one first fast-acting electric valve means for controlling operation of said first copying distributor means; a spool located at one end of the first copying distributor means so as to be connectable in output to an upper section of said chamber in which the plunger slides, and in input to said first pumping means and to said at least one first valve means; setting means with continuous micrometric movement for setting the stroke of said spool, which is locatable by contact pushing with said setting means, said setting means comprising: a head for contacting said spool, a worm screw means for actuating in movement said head mounted at an end thereof, and a corresponding motor unit for turning said worm screw means.