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Metalex Vietnam 2025
Wire EDM performance depends on a combination of machine capability, wire quality, and most importantly, the right set of cutting parameters. In this article, we will explore the key parameters that influence machining results and how to optimize them for better accuracy and surface finish.
1. Key Wire EDM Parameters
The following parameters have the greatest impact on cutting performance:
| Parameter | Description |
|---|---|
| Pulse On Time (Ton) | Time length of the electrical discharge. Affects cutting speed and surface roughness. |
| Pulse Off Time (Toff) | Interval between discharges. Affects stability and debris removal. |
| Peak Current (Ip) | Controls the discharge energy. Higher current increases cutting speed. |
| Wire Tension | Affects wire stability, accuracy and surface quality. |
| Wire Speed | Influences flushing efficiency and cutting stability. |
| Servo Voltage | Controls the gap between wire and workpiece. Critical for accuracy. |
2. Optimization Guidelines
To achieve the best balance between speed, accuracy and surface finish, follow these guidelines:
Balance Speed and Surface Finish
Higher peak current and longer pulse on time increase cutting speed, but may result in rougher surfaces.
Ensure Stable Discharge
Adjust pulse off time and wire speed to maintain stable discharges and effective debris removal.
Improve Accuracy
Lower servo voltage and proper wire tension help maintain a steady spark gap and improve dimensional accuracy.
Use the Right Wire
Choose the appropriate wire type and diameter for your material and workpiece thickness.
3. Example Results
By optimizing parameters for a mold part (SKD11, 60mm thick), we achieved:
* Results may vary depending on machine model, material and machining conditions.
4. Conclusion
Optimizing Wire EDM parameters is a continuous process. Start with a solid baseline, make small adjustments, and evaluate results to find the best combination for your specific application.