Wire EDM is used for 7075 aluminum when complex profiles, sharp internal corners, or features beyond milling capability are needed. The high zinc content machines well with EDM.
| Parameter | Value |
|---|---|
| Achievable Tolerances | ±0.005 mm |
| Surface Finish | Ra 0.4-1.0 μm |
| Cutting Speed | Fast — high conductivity |
| Feed Rate | Auto-tuned by EDM controller |
| Tooling Recommendations | Brass wire 0.20-0.25mm. Zinc-coated wire for speed. |
Similar parameters to 6061
Multiple skim passes for aerospace tolerances
Adequate flushing pressure
Deburr recast layer for fatigue-critical parts
Aerospace profiles
Slot features
Complex contours
Precision shims
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