Gas-operated strippers for drilling devices and drilling devices with the strippers

摘要

A gas-actuated hold-down (10) for punching devices comprising: - a tubular containment body (11), - a hold-down element (12), adapted to translate within the tubular body (11) in order to protrude from and retract into a first end (13) thereof, - a tubular punch die-covering element (14), which is coaxial to the tubular body (11), for guiding the hold-down element (12), - an annular closure body (15), designed to close the tubular containment body (11) at the opposite second end (16) thereof, - a pressure chamber (17) defined between the tubular body (11), the tubular punch die-covering element (14), the hold-down element (12) and the annular closure body (15), - a fixing flange (18), which widens radially from the tubular containment body (11) at the second end (16) thereof, - the fixing flange (18) having a through charging hole (19) which extends in a radial direction with respect to a main axis (X) of the hold-down (10), from a surface that is exposed in the configuration for use of the hold-down (10) up to the pressure chamber (17).