| 摘要 |
<p>PURPOSE: A method is provided which disposes laser blocking material prior to drilling cooling air holes with a laser into an airfoil having internal passages for cooling air. More particularly, the method includes steps for disposing laser blocking material in the cavity for blocking a laser beam from striking the interior as the hole is drilled to the internal passage through a wall of the airfoil. CONSTITUTION: A method for disposing laser blocking material 52 on the interior of an airfoil 10, such as a rotor blade or stator vane, includes shear thinning the material. Various steps are developed which promote decreases in viscosity of the blocking material. In one detailed embodiment, the material is passed through an injection molding machine 54 to provide shear thinning.</p> |
