When you need to cut tough metals with precise tolerances, wire EDM offers a cost-effective solution. The hardness of the material has no effect on the cutting speed of this technology, which means it can cut a stack of multiple work pieces at the same time as a single work piece. That makes Krosino's wire EDM service surprisingly cost-effective.

Wire EDM (Electrical Discharge Machining) is a non-contact, precision machining process that uses electrical sparks to erode material from a workpiece. Here's how it works: Basic Principle Wire EDM uses a thin, continuously moving wire (typically made of brass or copper) as an electrode to create electrical discharges between the wire and the workpiece. These sparks generate intense heat (up to 8,000–12,000°C), melting or vaporizing small amounts of material from the workpiece. The process is controlled by maintaining a precise gap (spark gap) between the wire and the workpiece, ensuring consistent and accurate material removal. Key Components Wire Electrode: The wire acts as the cathode and follows a programmed path to cut the workpiece. Common wire materials include brass, copper, and coated wires. Dielectric Fluid: Typically deionized water, it serves as an insulator, cools the cutting area, and flushes away eroded particles. CNC Control: Manages the wire path, cutting speed, and other parameters for precision and automation. Power Supply: Generates electrical pulses (100V to 300V) to create sparks and control their intensity and frequency. Process Steps Setup: The wire is threaded through the workpiece or positioned at the edge. The workpiece is submerged in dielectric fluid. Spark Generation: Electrical pulses create sparks between the wire and the workpiece, eroding material. Material Removal: The sparks melt small portions of the workpiece, and the dielectric fluid flushes away the debris. Cutting: The wire moves along a programmed path, cutting the material without physical contact. Finishing: Multiple passes (roughing and skimming) may be used to achieve the desired accuracy and surface finish.

What Materials Can Be Processed Using Wire EDM Machining?

Wire EDM can be used with almost any material that conducts electricity, including:

Advantages

Minimal Post-Processing Required: Wire EDM machining makes precise and accurate cuts, reducing the need for finishing and secondary processes.

Perfect for Parts With Complex Geometries: Krosino's wire EDM service can create complex geometries that are difficult or impossible to achieve using traditional machining methods.

Excellent Edge Quality: Wire EDM produces a clean, burr-free surface finish that requires minimal additional processing.

Efficient: Multiple workpieces can be stacked for simultaneous cutting.

Disadvantages

Material Limitations: Wire EDM can only be used with materials that conduct electricity.

Not as Fast as Other Cutting Methods: Wire EDM machining cuts relatively slowly compared to water jet and laser cutting.

Minimal Heat-Affected Zones: The heat from the sparks can create a recast layer and affect the microstructure of the material near the cut.

Experience Required: Wire EDM requires significant operator expertise and experience to do it well.