Understanding common Wire EDM terminology is important when selecting a machine, comparing technical specifications, communicating with suppliers, or operating Wire Electrical Discharge Machining equipment.
Different manufacturers may use slightly different expressions for machine types, machining parameters, consumables, and operating functions. This glossary explains commonly used Wire Cut EDM terms in simple English to help buyers, engineers, and operators better understand WEDM technology.
1. Wire EDM Machine Types & Basic Concepts
| Term | Chinese | Explanation |
|---|---|---|
| WEDM / Wire Electrical Discharge Machining / Wire Cut EDM | 电火花线切割 | A machining process that cuts conductive metal using electrical discharge through a thin wire electrode. |
| Medium-Speed Wire Cut EDM / MS-WEDM | 中走丝线切割 | Wire EDM with medium wire travel speed and multiple cutting passes for improved accuracy and surface finish. |
| Low-Speed Wire Cut EDM / Precision Wire EDM | 慢走丝线切割 | High-precision Wire EDM using slower wire travel for applications requiring higher accuracy and finer surface quality. |
| High-Speed Wire Cut EDM / HS-WEDM | 快走丝线切割 | Wire EDM with faster wire movement, generally used for economical and efficient machining. |
| Multi-Pass Cutting / Multi-Cut | 多次切割 | Cutting the same contour several times to improve dimensional accuracy and surface finish. |
| Wire Tension | 钼丝张力 | The tensile force applied to the electrode wire. Stable tension helps reduce wire vibration and maintain machining precision. |
| Wire Speed | 丝速 | The travel speed of the electrode wire. Proper wire speed helps control wire temperature and remove debris from the machining area. |
| Flushing | 冲液 | Injection of dielectric fluid into the spark gap to cool the machining area and remove debris. |
The main difference between Fast, Medium-Speed, and Low-Speed Wire EDM lies in wire movement, machining strategy, accuracy, and surface finish. Medium-Speed Wire EDM commonly uses multiple cutting passes to improve machining quality.
2. Machining Accuracy & EDM Parameters
Understanding machining parameters is especially important when comparing different Wire EDM models.
| Term | Chinese | Explanation |
|---|---|---|
| Machining Accuracy / Precision | 加工精度 | Indicates how closely the finished part matches the designed dimensions. |
| Dimensional Tolerance | 尺寸公差 | The allowable deviation between the finished dimension and the nominal dimension. |
| Surface Roughness (Ra) | 表面粗糙度 | A measurement of surface smoothness. A lower Ra value generally indicates a smoother surface. |
| Cutting Speed | 切割速度 | The material removal rate during Wire EDM cutting, commonly expressed in mm²/min. |
| Straightness | 直线度 | Indicates how straight the machined edge is. |
| Perpendicularity | 垂直度 | Indicates how close the machined surface is to 90° relative to the reference surface. |
| Positioning Accuracy | 定位精度 | The deviation between the commanded position and the actual position reached by the machine. |
| Repeat Positioning Accuracy | 重复定位精度 | The consistency of the machine when repeatedly moving to the same position. |
| Roundness | 圆度 | Indicates how closely a machined circular feature approaches a perfect circle. |
| Taper Angle | 锥度 | The angle at which the wire tilts to machine inclined or tapered surfaces. |
| Maximum Cutting Thickness | 最大切割厚度 | The maximum workpiece thickness that the machine can process. |
| Wire Wear / Wire Consumption | 丝损 | Reduction in wire condition or diameter caused by electrical discharge during machining. |
| Discharge Current | 加工电流 | The average electrical current used during EDM discharge. |
| Peak Current | 峰值电流 | The highest current reached during a discharge pulse. |
| Pulse Width / Pulse On-Time | 脉宽 | The duration of each electrical discharge pulse. |
| Pulse Interval / Pulse Off-Time | 脉间 | The pause between two discharge pulses. |
| Offset | 偏移量 | Compensation used for wire diameter and spark gap during programming. |
| Gap Voltage | 间隙电压 | The voltage between the electrode wire and workpiece. |
| Spark Gap | 放电间隙 | The small gap between the wire and workpiece where electrical discharge occurs. |
Surface roughness, positioning accuracy, dimensional tolerance, and cutting speed are among the most commonly compared technical parameters when buyers evaluate Wire EDM machines.
3. Programming & Process Terms
| Term | Chinese | Explanation |
|---|---|---|
| IP / Power Tube Level | 功率管数 | A power level setting commonly used on domestic WEDM systems. |
| VF / Variable Frequency Tracking | 跟踪 | Servo tracking function that automatically adjusts table feed according to the spark gap. |
| Speed Limit | 限速 | Maximum worktable feed speed used to help prevent unstable cutting and wire breakage. |
| Boss Length | 台宽 | Axial length of a protruding cylindrical boss on the workpiece. |
| Allowance | 修刀余量 | Material intentionally left for subsequent finishing or trim cutting. |
| Outline | 外形 | The outer contour of the workpiece used to generate the Wire EDM cutting path. |
| Inner Hole | 内孔 | An internal profile or hole that normally requires a starting hole before wire threading. |
| Database | 数据库 | Built-in machining parameter library used for selecting or recalling machining conditions. |
Many modern Wire EDM control systems include parameter databases to help operators select suitable machining conditions for different materials and cutting requirements.
4. Wire EDM Consumables & Parts
Wire EDM performance also depends on the condition and quality of consumables and replacement components.
| Term | Chinese | Explanation |
|---|---|---|
| Molybdenum Wire | 钼丝 | A common electrode wire used in Medium-Speed and High-Speed Wire EDM machines. |
| Brass Wire | 黄铜丝 | Electrode wire commonly used in precision Low-Speed Wire EDM machines. |
| Electrode Wire | 电极丝 | General term for the wire that carries the electrical discharge during machining. |
| Contact Block / Power Feed Contact | 导电块 | Transfers electrical current to the moving electrode wire. |
| Wire Guide Wheel | 导轮 | Guides the electrode wire above and below the workpiece. |
| Upper Guide / Lower Guide | 上导轮 / 下导轮 | Wire guiding components installed above and below the machining area. |
| Tension Pulley / Wire Tensioner | 张紧轮 | Maintains appropriate wire tension during operation. |
| Dielectric Fluid / Working Fluid / Emulsion | 工作液 | Fluid used to cool the machining area and remove debris. |
| Nozzle | 导丝嘴 | Directs dielectric fluid toward the cutting area. |
Consumables such as molybdenum wire, conductive blocks, guide wheels, working fluid, and tensioning components should be inspected regularly because their condition can affect cutting stability and accuracy.
5. Wire EDM Operation & Functions
| Term | Chinese | Explanation |
|---|---|---|
| Automatic Wire Threading | 自动穿丝 | The machine automatically threads the electrode wire through the starting hole. |
| Manual Wire Threading | 手动穿丝 | The operator manually threads the wire through the workpiece. |
| Wire Break | 断丝 | The electrode wire breaks during machining. |
| Wire-Break Protection | 断丝保护 | The machine automatically stops when wire breakage is detected. |
| Short Circuit | 短路 | A condition where the wire and workpiece are too close, preventing normal electrical discharge. |
| Retract / Back-Off | 回退 | Movement away from the machining position to restore stable cutting conditions. |
| Alignment | 找正 | Positioning the wire relative to the workpiece reference point before machining. |
| Workpiece Clamping | 工件装夹 | Securing the workpiece on the machine table before cutting. |
| Tension Adjustment | 张力调节 | Adjustment of electrode wire tension. |
| Straightening | 校直 | Correcting the straightness of the wire or workpiece. |
| Compensation Amount | 补偿量 | Compensation applied for cutting gap and wire wear. |
| Rapid Positioning | 快速定位 | Machine movement without electrical discharge or cutting. |
These functions affect machine setup, operator convenience, and machining stability, especially during continuous production and complex profile cutting.
Why Is Wire EDM Terminology Important?
Understanding these terms makes it easier to compare different Wire EDM machines and communicate machining requirements accurately.
For example, when selecting a machine, buyers should clearly understand the difference between positioning accuracy and machining accuracy, as well as the relationship between cutting speed, surface roughness, wire tension, taper capability, and maximum workpiece thickness.
For machine operators, understanding terms such as gap voltage, pulse width, pulse interval, flushing, offset, wire tension, and cutting allowance also helps improve machine setup and process control.
Conclusion
Wire EDM involves a wide range of mechanical, electrical, CNC, and machining terminology.
Understanding the basic terms related to machine types, machining accuracy, EDM parameters, consumables, and operating functions can help buyers select suitable equipment and help operators communicate machining requirements more accurately.