Electrical Discharge Machining (EDM)
Applications
1. Sinker EDM (Die-Sinking / Ram EDM)
In Sinker EDM, a custom-machined electrode (typically graphite or copper) shaped like the desired cavity is submerged in a dielectric fluid and plunged toward the workpiece. Millions of microscopic electrical sparks vaporize the material, mirroring the exact 3D geometry of the electrode into the metal.
2. Wire EDM (Wire Cutting)
Wire EDM utilizes a thin, continuously spooling brass or coated wire (typically 0.1mm to 0.3mm in diameter) as the electrode. Guided by CNC axes through a dielectric bath (deionized water), the wire acts like an ultra-precise bandsaw, slicing through metal regardless of hardness.
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Spark Erosion Technology: Employs high-frequency pulsed voltage and constant current control to achieve precise thermo-electric material removal across conductive metals.
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Zero Mechanical Stress: Non-contact cutting eliminates physical load on the workpiece, significantly mitigating part distortion, micro-cracking, and material breakage during heavy-section cutting.
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Superior Surface Quality: Optimized spark energy management and continuous dielectric fluid flushing produce ultra-fine surface finishes ($Ra$ values) with tight micro-tolerances on thick or intricate geometries.
Materials that can be machined.
Aluminum Alloy: 2024, 5052, 6061, 6063, 6082, 7075.
Special Alloy: TA2, TC4, 4J29 (KOVAR), 4J36 (INVAR), High Temperature Alloy (INCONEL 718, 625).
Stainless Steel: SUS303, SUS304, SUS316, SUS420, SUS440c, SUS630.