10/1/2014 | 1 MINUTE READ

EDM Suited for Hole Drilling

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Makino's EDBV8 EDM hole driller is well-suited for producing film cooling holes and shaped diffuser holes in blade and vane segments.

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Makino's EDBV8 EDM hole driller is well-suited for producing film cooling holes and shaped diffuser holes in blade and vane segments. The machine’s tooling system integrates the electrode and die guide into a common assembly for quick and reliable automated exchanges, and provides programmable control electrodes and electrode diameter size changes.

XYZW travels measure 800 × 600 × 750 × 500 mm (31.5" × 23.6" × 29.5" × 19.7"). A two-axis rotary table accommodates workpieces as large as 500 mm (19.7") in diameter and 635 mm (24.96") long, and weighing 150 kg (330 lbs). The rotating C-axis head features an Erowa compact chuck that enables automatic changing of electrode diameters from 0.2 mm (0.008") to 6.0 mm (0.236") with rotation speeds of 1,000 rpm. A rigid guide arm assembly can hold, locate and support the die guide; alternatively, it can serve as a programmable axis (W axis) running parallel to the Z axis. An integrated “middle guide” in the W axis can be used with long, small-diameter electrodes to prevent whipping, bending and vibration.

The EDBV8 also offers improved flushing through fully submerged machining, achieving faster cycle times with 10-MPa (1,450-psi) flushing capability. For accessibility, the machine offers a three-sided, rise-and-fall work tank. Other features include a fast-response breakthrough detection circuit to prevent back-striking or back-wall impingement, an onboard water quality control system, deionization system, chiller unit, and automatic tool and guide change systems.

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