In aircraft engine, cooling holes are widely used for creating a film of cooling air on the surface of turbine blades and vanes to prevent them from melting,
Hole drilling EDM
Hole drilling EDM uses low cost electrode tube (normally brass or copper material) to drill holes on a electrically conductive material at a very high speed, the hole depth diameter ratio can reach up to 200. The hole diameter is normally from 0.3mm to 3.0mm, with five axis configuration the machine can drill hole at any angles on a inclined surface workpiece. This technology is widely used for hole machinig in aerospace, energy, cutting tools, automotive, medical, mold and die industries.