The Basics to Wire Erosion
EDM (Electro Discharge Machining) Wire Erosion is a precision engineering process where a work piece is cut through with a strand of wire, it creates electrical sparks between the wire and the work piece, and these electrical sparks cut the work piece. It’s a cost-effective method that has incredible accuracy on thicker component parts. Wire cutting machines can cut complex shapes even in tough materials.
The sparks are extremely controlled and in the more recent years to make sure that the cutting is accurate, dielectric deionised water is used. The water acts as a coolant to make sure the metal components don’t overheat and to wash away any particles that could get in the way. The wire erosion process starts towards the edge of a work piece or by drilling a hole where the process will start.
The EDM wire erosion process dates back to 1770 when an English scientist, Joseph Priestley discovers that electrical discharge could erode metal.
- You can achieve very intricate detail when using this form of machinery.
- Hard materials do not affect the process.
- It can handle even the smallest of workpieces compared to the more traditional cutting tools which cause damage.
- There isn’t any direct contact between the tools and workpiece, meaning weaker materials can be machined without it breaking.
- Any surface finish can be obtained.
- Fine holes can easily be drilled.
- Complex cutting can be achieved.
- Wire Erosion doesn’t leave burrs.
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- The materials used must be conductive.
- It can be the more expensive option when compared with CNC milling.
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There are many different types of metals that can be used in the wire erosion process. The typical options of metal electrode are:
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It has a high rate of wear however it is primarily now used for EDM hole drilling.
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The metal removal rate and the wear are both reasonable.
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Used when the safety of copper is needed, however, this material has a much better wear resistance due to its high melting point.
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If you need a high conductivity level that silver offers but with the added resistance of Tungsten. This is a more expensive option compared to Copper Tungsten and it is only used for specific applications.
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This isn’t a common choice; it is used when speed isn’t considered a necessity on a job. Tungsten will work slower than other metals. Using Tungsten is more expensive.
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Overall the wire erosion process will create your product from a work piece with ease but without touching it so no matter how thin or fragile the work piece, it won’t get damaged. If you would like any more information regarding our Wire Erosion services here at MNB Precision, get in touch with our helpful team today.
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