Patent ID: 8806998

Claim:
A gas-operated integrated punching device with plate presser, comprising a tubular containment body that is closed hermetically at a first end by a bottom and at a second end arranged opposite said first end by a head that is perforated for a passage of a piston-operated plate presser capable of moving with a translational motion within said tubular body, said plate presser being crossed coaxially by a punch, which is jointly connected to said tubular body, a compression and expansion chamber for pressurized gas being formed between said plate presser and said bottom whereby the pressurized gas pushing said plate presser between two configurations comprising a first fully extracted configuration, in which an outer end of the plate presser protrudes from the head by a fully extracted length, and a second retracted configuration in which said plate presser is at least partly retracted into the tubular body with respect to said first fully extracted configuration, said gas being loaded into said chamber by way of a loading element inserted in said bottom or in said tubular body, and the punching device further comprising a tubular guiding portion for the plate presser and for protecting said punch, said punch being reversibly jointly connected to said bottom and said tubular guiding portion being arranged extending in a direction from said bottom toward the head such that said punch is slidingly removably arranged inside said tubular guiding portion, the plate presser being slidingly arranged on said tubular guiding portion between said first fully extracted configuration and said second retracted configuration, in a sealed manner provided by an internal guiding seal arranged between said plate presser and said tubular guiding portion, and provided by an external guiding seal arranged between said plate presser and an internal surface of said tubular body, such that said punch is selectively replaceable by sliding inside said tabular guiding portion at any configuration of said plate presser comprised between said first fully extracted configuration and said second retracted configuration without discharging the pressurized gas from said compression and expansion chamber.