Slow EDM

The principle of slow wire-cut EDM involves an electrode wire reaching instantaneous temperatures exceeding 6000°C under pulse power supply, causing localized erosion of the workpiece through high heat.
The electrode wire in our Weldo slow wire EDM machines is typically copper or coated wire. According to our technicians, the wire diameter ranges from approximately 0.05 to 0.3 millimeters. The wire feeds at a slow speed of several millimeters per second.
This ensures stability during workpiece machining and reduces processing errors.

Characteristics of Slow Wire EDM

Low-speed wire feed and unidirectional cutting:

The electrode wire moves unidirectionally at low speed to process the workpiece, effectively ensuring precision in cutting and erosion.

Processing flow:

Rough machining → Semi-finishing → Finishing, progressively enhancing machining accuracy and surface finish.

Common Applications of Slow-Speed EDM:

1. Mold Manufacturing:

Cavities for injection molds, die-casting molds, and stamping dies. Surface roughness Ra does not exceed 1.6μm, completely eliminating burrs and rough edges produced by high-speed EDM.

2. Aerospace:

Machining turbine blade cooling holes (diameter 0.3-1mm, depth-to-diameter ratio >15:1) and engine structural components.

3. Medical Devices:

Manufacturing surgical instruments, implants (e.g., artificial joints), and microfluidic chips.

4. Electronics Manufacturing:

Cutting semiconductor wafers, precision connectors, microelectronic components, etc.