| 摘要 |
<p>A device for drilling printed circuit boards comprising a first drill head (8a) guided along a drilling axis (Z) towards and away from a corresponding first drilling plane ((XY)a) substantially perpendicular to the drilling axis, the drilling plane ((XY)a) being displaceable with respect to the drilling axis (Z) during a positioning movement of the board to be drilled (Pa), the head (8a) being displaceable along the axis (Z) towards the plane ((XY)a) during a cutting movement and during an opposite return movement from this plane ((XY)a); the device comprises a second drill head (8b) rigid with the first head (8a) during the movement along the axis (Z) and a second drilling plane ((XY)b) parallel to the first plane and facing the second drill head (8b) in an arrangement such that a return movement of the first head (8a) corresponds to a cutting movement of the second head (8b) and vice versa.</p> |
