Spark erosion, also known as Electrical Discharge Machining (EDM), is a thermal, ablative manufacturing process used for the high-precision machining of electrically conductive materials. Thanks to its unique capabilities, EDM is considered a core technology in the production of complex forming and stamping tools used in the mass production of metal and plastic components across nearly every industrial sector.
How spark erosion works:
Spark erosion takes place in a dielectric fluid bath, where two electrodes interact without touching:
- The tool is a continuously fed wire electrode with an applied voltage.
- The workpiece is the second electrode.
As the wire electrode travels through the workpiece, a controlled electrical discharge process occurs. High-frequency pulse generators initiate up to one million sparks per second. This creates intense plasma discharges at temperatures over 10,000 °C, yet the bulk of the workpiece remains thermally unaffected.
The result: microscopic material removal along a programmed cutting path. Each spark vaporizes metal atoms in a controlled explosion, forming an ultra-precise micro-canyon—accurate down to the micrometer.
Performance & benefits:
- Cutting speeds of up to 400 mm²/min and more
- Extreme precision with minimal thermal distortion
- Ideal for hard or hardened materials
- Perfect for complex geometries, internal contours, and fine details
- Contactless machining – no mechanical forces on the workpiece
bedra: premium wire electrodes for EDM
The wire electrodes used in spark erosion play a critical role in process stability, precision, and surface quality.
bedra wire electrodes are engineered specifically for high-performance EDM, ensuring maximum cutting speed, durability, and dimensional accuracy in all leading EDM machines.
English 
Deutsch 
Tiếng Việt 
中文