Automatic drilling machine for drilling in one-shot at least two holes in a crosspiece structure

An automatic drilling machine for simultaneously drilling at least two holes through a surface of a crosspiece, the machine comprising:

• an automatic drilling unit comprising a main body having at least two tool holders, each one adapted for receiving a drilling tool,
• wherein the automatic drilling unit has a cross-shaped channel configured for receiving, at least partially, the crosspiece to be drilled inside the automatic drilling unit, and
• wherein the tool holders are arranged and positioned, when the drilling unit is mounted with the crosspiece to be drilled, in accordance with locations of the crosspiece where the at least two holes are to be drilled,
• wherein the automatic drilling unit is a pneumatic device and has a pneumatic circuit, the automatic drilling unit further comprising position detecting means configured and arranged to detect a correct position of the crosspiece when the crosspiece is coupled with the automatic drilling unit, and wherein the position detecting means are operatively associated with the pneumatic circuit.