Method determining hole completion

摘要

The present disclosure provides a method for determining a hole completing in laser drilling of a hole in a near wall of an airfoil. The method includes drilling a hole in the near wall of the airfoil using a laser drill. The laser drill may move in a pattern relative to the airfoil. The method also includes determining when the drilling of the hole is complete based on a calculated time duration between successive breakthroughs of a laser from the laser drill through the near wall of the airfoil, or based on a calculated time duration since the latest breakthrough of the laser from the laser drill through the near wall of the airfoil.

主权项

1. A method for drilling a hole in an airfoil comprising:
drilling a hole in a near wall of the airfoil using a laser drill; determining that the laser drill has broken through the near wall of the airfoil by sensing a change in a process condition indicative of a breakthrough; calculating a time duration since determining that the laser drill has broken through the near wall of the airfoil, wherein calculating the time duration comprises continuing to sense the process condition to determine if the laser drill remains broken through; and determining that the hole in the near wall of the airfoil is complete once the calculated time duration exceeds a predetermined amount of time; wherein the time duration extends until the earlier of when the laser is no longer broken through the near wall of the airfoil or the time duration exceeds the predetermined amount of time.