How has EDM become an important part of the aerospace industry? | What's New

How has EDM become an important part of the aerospace industry?

November 4, 2014 10:50:25 AM

EDMs were once unsuited to cut a majority of aerospace parts because most EDM machines did not have the required precision to meet the strict regulations put forth by the FAA. That’s not the case anymore.

From Taboo to Trusted Method: EDM Machining in Aerospace written by Doug Maywald, Applications Engineer, MC Machinery Systems, was featured in the recently released SME Aerospace yearbook. His article explains the evolution of EDM as a trusted technology in the aerospace world.

Prior to 1994, EDM machines triggered microcracking on the surface of cut parts due to electrolysis, which is the electrically enhanced corrosion of material in a water environment in a wire EDM machine, according to Maywald’s article.

Mitsubishi EDM developed a new generator in 1994 that positively altered the relationship between aerospace and EDM. Mitsubishi machines began using an antielectrolysis power supply which created chips that were not magnetically charged and eliminated microcracking. As a result, finished parts were left with a smooth surface, free from a cracked white layer. 

Maywald also added that Mitsubishi’s antielectrolysis generator has evolved since 1994 with each generation improving upon the former in terms of eliminating problems with the white layer. EDM machines can now consistently machine difficult workpieces with unrivaled accuracy.

The latest addition to the MV Series is the MV4800 Advance, which cuts significantly quicker than previous EDM machines, plus it has a larger tray allowing manufacturer’s flexibility to machine larger parts than ever before—which is extremely vital in aerospace. The MV4800 Advance features a broad travel of 800 × 600 × 500 mm and can machine workpieces up to 1349 × 1100 × 500 mm. 

To read the entire SME article "From Taboo to Trust Method: EDM Machining in Aerospace", click here.

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