Advantages of Electrode Machining (EDM)
Electrode machining (EDM) offers advantages over conventional machining. The process produces smooth surfaces without burrs. EDM can also accommodate tight tolerances and complex geometries.
EDM machines generate an electrical field around a metal piece. This creates heat inside the material, which allows the material to be softer. It also reduces the need for post-machining thermal treatments. However, it adds cost.
A dielectric fluid acts as an insulator between the tool and the work piece. During the process, metal particles are carried away. The dielectric flow flushes any leftover material and can remove material at the surface. Typically, this leaves a mirror-like finish on the machined surface.
The EDM machining process can be used to create intricate shapes, cavities, and grooves in machined parts. This process can also be used to build thin eyelets in medical devices.
Materials like Inconel, titanium alloy, and tungsten carbide are good candidates for EDM. The kerf width for a wire EDM is typically 0.1 to 0.3 mm.
Although the process is capable of removing hardened materials, it is not recommended for composites. It also does not work on wood. In addition, it is not a sustainable manufacturing method.
When using EDM, it is important to use the right material. Some types of metals can become damaged or even eroded if the process is not controlled properly. Using a material with a higher melting point, such as copper, can increase the chances of the process working correctly.
