Automatic fixed-position punching apparatus

The utility model relates to an automatic distance marking perforating device which comprises a punch (2), a feeding frame (11) and a transmission control bracket (12) which are respectively arranged at the front and the back sides of the punch (2) and an electric control box (5) provided with a PLC programmed control system, wherein, the transmission control bracket (12) is provided with a transmission control device (3) and a drawing mechanism; the punch (2), the transmission control device (3) and the drawing mechanism are connected with the electric control box (5) and are controlled by the electric control box (5); when a component to be perforated travels to a preset perforating position, the transmission control device (3) senses the position of the component to locate, the electric control box (5) controls the punch (2) to perforate the component, and the drawing mechanism props up and pushes the component out after finishing the perforation. The perforating device of the utility model has high automation level, accurate distance marking, and standard perforating quality, greatly enhances the production efficiency, and can be applied to the perforation of thin components of various materials, lengths and widths, which can adapt to the worktable of the punch.