Gas-operated integrated punching device with plate presser

A gas-operated integrated punching device with plate presser, comprising a tubular containment body that is closed hermetically at one end by a bottom and at the opposite end by a head that is perforated for the passage of a piston-operated plate presser, which performs 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 the pressurized gas being designed to push said plate presser between two configurations, a first fully extracted configuration, in which an outer end of the plate presser is not in contact with a metal plate to be blanked or punched and protrudes from the head by such a length as to affect a tip of the punch, and a second configuration, which is at least partly retracted into the tubular body and in which the outer end of the plate presser is in contact with one metal plate being worked, wherein said gas is loaded into said chamber by way of loading means inserted in said bottom or in said tubular body, and in that a tubular guiding portion for the plate presser and for protecting said punch extends from said bottom toward the head, the plate presser being shaped so as to slide thereon.