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 with five axes is a robust and consistent solution in terms of recast layer and productivity. In cutting tools, the internal cooling can reduces the high cutting temperature generated and increase cutting tool life, optimum chip removal and increase cutting process reliability, these internal cooling holes can be done by hole drilling EDM with five axes in a single setup.
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 machining in aerospace, energy, cutting tools, automotive, medical, mold and die industries.