Lasercaving

Lasercaving

MTU has adopted a highly efficient technique, laser caving, to produce contoured holes. It uses a laser to generate flared cooling air holes in high-pressure turbine blades and vanes. Through such holes, the outflowing air spreads more advantageously over the component surface. This improves the cooling action, permits higher turbine entry temperatures and thus improves the engine’s efficiency. To produce the holes, the machine uses a two-stage process. In a first step, a laser drills a 0.25-to 0.85mm cylindrical hole. Thereafter, a second laser is used to remove material in such a manner that a bellmouth results.