Electrical discharge machining (EDM) using wire is a subtractive manufacturing process capable of intricate cuts in electrically conductive materials. A thin, continuously spooling wire, often brass, acts as an electrode. Guided by computer numerical control (CNC), this wire never touches the workpiece. Instead, it creates a spark gap within a dielectric fluid bath. This controlled erosion process removes material with extreme precision, allowing for complex shapes and fine details typically impossible with traditional machining methods. A prime example is the creation of intricate dies and molds.
This technology offers significant advantages in manufacturing. Its ability to achieve tight tolerances and intricate geometries makes it ideal for producing complex parts from hard materials. The absence of direct contact between the wire and the workpiece minimizes mechanical stress and allows for machining delicate structures without distortion. Emerging from early experiments with spark erosion in the mid-20th century, wire EDM has evolved into a cornerstone of modern manufacturing, particularly within the aerospace, medical, and automotive industries where high precision and complex components are essential.
