Punching apparatus

A punching apparatus for a punching machine, comprising a punch holder and a punching tool, said punch holder comprising a guiding body, provided with a mounting cavity suitable to slidably receive said punching tool, and a driving assembly connected to said guiding body and provided with a beating element having a first operating end suitable to interact with a ram of the punching machine and a first connecting end coupled to a second connecting end of said punching tool by means of a threaded coupling, which enables a relative rotation between said beating element and said punching tool for a linear movement thereof with respect to said beating element along an adjustment stroke between an initial adjustment position, in which an engagement portion of said threaded coupling has a maximum length, and a final adjustment position, in which said engagement portion has a minimum length, said punching apparatus wherein it comprises a stopping element having a first end and a second end, said first end being fixed inside a connecting cavity made in one of said connecting ends and arranged to receive the remaining connecting end, said second end being inserted in a stopping cavity made in said remaining connecting end and sliding inside said stopping cavity during said linear movement of said punching tool between said initial adjustment position and said final adjustment position, said second end being provided with a first stopping system arranged to abut a second stopping system provided at an opening of said stopping cavity so as to prevent said stopping element from disengaging from said stopping cavity and to stop said adjustment stroke of said punching tool in said final adjustment position.