For discharge machining of cooling air holes and shaped diffuser holes in blade and vane segments, Makino is introducing the EDBV3 Fast Hole Drill EDM: it indicated the new system will provide aerospace manufacturers with the speed, flexibility, and reliability to produce a range of hole shapes and sizes effectively within a single setup, reducing significantly the variety of tools required and overall cycle times.

“The need for EDM drilling with advanced capabilities in blade and vane components has grown substantially due to new engine production requirements, as aerospace manufacturers strive to improve engine performance and reduce fuel consumption,” according to Makino’s EDM product line manager Brian Pfluger. “The EDBV3 fulfills these needs by building on Makino’s EDM platforms with onboard filtration and resin systems and a user-friendly control system with preprogrammed hole profiles.”

“Its 2-axis rotary table combined with automatic tool and guide change systems enable manufacturers to reliably machine complex features fully unattended, saving time and money, without risk to loss of part quality or accuracy,” he continued.

The EDBV3 is capable of X-, Y- and Z-axis travels of 370 mm, 270 mm and 500 mm (14.5 in., 10.6 in. and 19.6 in.), respectively, and has worktable dimensions of 250 mm by 270 mm, with a maximum workpiece weight load of 5 kg (optional 15-kg payload available.) Its rotary C-Axis head features an EROWA compact chuck that makes possible automatic changing of electrode diameters down to 0.2 mm (0.008 in.), and can spin up to 1,000 rpm.

All EDM drilling on the EDBV3 is performed fully submerged under water for higher part quality, improved stability, and up to 10 times faster processing speeds than conventional technologies. To improve productivity, the EDBV3 uses a single-electrode processing approach that avoids the high cost of custom multi-electrode holders and standardizes the tool holders with a more flexible and cost-efficient system.