EDM Equipment

EDM, or electrical discharge machining, is capable of machining complex shapes in hard materials. The process includes an electrode and a workpiece, both submerged in dielectric fluid. Electrical current flows between the workpiece and electrode, repeatedly creating tiny plasma zones that instantaneously melt and remove the material. The electrode in EDM takes different forms. Wire EDM machines use a thin wire to cut. Ram EDM machines, or “die sinkers,” use electrodes that are custom machined into 3D shapes. The EDM process produces a cavity in the part that is the opposite or female version of the “male” electrode form. Similar to the ram EDM machine is the small-hole EDM machine, or “hole popper.” On this machine, the electrode is a cylinder used to machine a hole. 
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extrusion die
Article

Masters of the Small Hole

Hole making is considered the most frequently performed metalworking operation. Hole making on a micro level, say 0.010 inch and smaller, is where it gets interesting. This shop is very good at making small holes.

Article

EDM Enables DIY Form Tools

This manufacturer uses its EDM unit to make and sharpen form tools for its production equipment. Strategically, learning new skills in-house may lead to future commercialization of a value-added process not previously available. It could be a model for other shops.

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Sinker EDM is Built for General Precision Machining

Makino’s Edge2 sinker EDM is built for general precision machining applications and provides accurate and reliable performance for standard die/mold components or contract manufacturing with a space-saving design for shop floors.




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