HIGHLY PRECISE CUTS INDEPENDENT OF MATERIAL HARDNESS
Wire erosion can cut all conductive metals, regardless of their hardness. Even with thick materials, extremely small cutting widths with high dimensional accuracy and shape accuracy are possible, thus meeting the highest precision demands. Therefore, wire erosion is often used for parts that are difficult to produce with traditional processing.
ADVANTAGES:
To make the desired cuts, a positively charged metal wire is used to remove material from a negatively charged workpiece by means of spark erosion. At the point where the wire is the closest to the workpiece, a field is generated in which charged ions are accelerated. The ions collide in the resulting ionized channel, generating extremely high temperatures far above the boiling point of the material (more than 8000°C) and creating gas bubbles along the ionized canal. When the current flow is interrupted, the temperature suddenly drops, causing the gas bubbles to implode and ejecting material.
These procedures take place at frequencies up to 30 kHz. The wires are made of brass, copper, tungsten or steel, are partially coated with zinc and may be thermally treated.