Wire Cut EDM, also known as (wire electrical discharge machining or wire EDM) is a method to cut conductive materials with a thin electrode that follows a programmed path. The electrode is a thin wire. Typical diameters range from .004" - .012" (.10mm - .30mm) although smaller and larger diameters are available. The hardness of the work piece material has no detrimental effect on the cutting speed. During the wire cut EDM process there is no direct contact between the wire and the work piece which allows for machining without causing any distortion. Rather, the wire is charged to a voltage very rapidly. This wire is surrounded by deionized water. When the voltage reaches the correct level, a spark jumps the gap and melts a small portion of the work piece. The deionized water cools and flushes away the small particles from the gap. .
The CNC machine can independently move four machines axes to generate taper cuts. A stamping die can be machined with 1/4 degree taper or a mold with one degree taper in some areas and two degrees in another with precision. Extrusion dies can be cut with the taper constantly changing. For example, a detailed shape on the top of the work piece can transition to a simple circle on the bottom.
Wire cut electrical discharge machining is accurate to +/-.0001". Virtually no burrs are generated. Since no cutting forces are present, wire EDM is ideal for delicate parts. No tooling is required so delivery times are short. Pieces up to 16" thick can be machined. Tools and parts are machined after heat treatment, so dimensional accuracy is held and not affected by heat treat distortion.
Uses for Wire Cut EDM:
Small work pieces that may be damaged from conventional machining or traditional techniques
Parts that need to hold accurate tolerances
Delicate or weak materials
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