Stamping assembly

The utility model discloses a stamping assembly which comprises a stroke piece, a pressing piece and a pressing piece, the stroke piece comprises a movable sleeve and a stamping head, and a positioning hole is formed in the stamping head in a penetrating mode; the elastic piece is movably arranged in the movable sleeve; the cylindrical pin is matched with the positioning hole; the stamping part comprises a needle pushing head and a movable disc, and the elastic part is arranged on the surface of the needle pushing head in a surrounding mode; the limiting column is used for limiting the moving range of the movable disc; and the magnet block is arranged at one end, close to the punching head, in the needle pushing head. According to the punching device, the situation that the cylindrical pin bounces off due to punching when the cylindrical pin is placed inaccurately can be prevented, personnel injury is avoided, the operation safety of the personnel is improved, meanwhile, the hole diameter positioning precisio