EDM tungsten needle electrode is a tool used for Electric Discharge Machining (EDM). It is usually used for cutting and processing hard, high-strength conductive materials. These electrodes are usually made of tungsten or tungsten alloy because tungsten has high hardness and high melting point, making it suitable for working in environments with high temperatures and high-energy discharges.
Electrical discharge machining is a non-traditional metal processing method that uses spark discharges generated by electrical pulses to strip material from the surface of a workpiece and form the desired shape. Spark discharge is generated in the gap between the electrode (usually an EDM tungsten needle electrode) and the workpiece through the action of current and voltage, causing the material on the surface of the workpiece to be melted and evaporated.
Here are some key features and applications of tungsten needle electrodes for EDM:
1. High hardness: The hardness of tungsten is very high, which allows the tungsten EDM needle electrode to withstand high mechanical and thermal stress during the EDM process.
2. High melting point: Tungsten has a high melting point, which allows the EDM tungsten needle electrode to maintain stability under high temperature conditions.
3. Electrical conductivity: EDM requires the electrode to be able to conduct electricity, and tungsten is an excellent conductive material.
4. Micromachining: Since the EDM process has a high degree of precision and fineness, EDM tungsten needle electrodes are suitable for manufacturing tiny, complex-shaped parts.
5. Carbide manufacturing: EDM tungsten needle electrodes can also be used to manufacture carbide (such as tungsten-cobalt carbide) tools and blades. These tools are used for cutting and processing workpieces with higher hardness.
EDM tungsten needle electrodes are widely used in aerospace, mold manufacturing, precision machinery manufacturing and other fields, especially where high precision and micro-machining are required.
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