In general, every conductive material can be machined with electrical discharge machining. Common materials include metals or metal alloys such as hardened steel, titanium, and composites . Typically, the electrodes for die sinking EDM are made of copper or graphite.
Can glass be machined by EDM?
EDM is not suitable for machining of (a) Very hard metals, (b) Glass, (c) Plastics, (d) Fragile metallic components.
Which material Cannot be machined by EDM?
2. Which of the following material cannot be machined using electronic discharge machine? Explanation: Wood is a bad conductor of electricity and hence cannot be machined using electronic discharge machine.
Can steel be machined by EDM?
EDM typically works with materials that are electrically conductive , although methods have also been proposed for using EDM to machine insulating ceramics. EDM can cut intricate contours or cavities in pre-hardened steel without the need for heat treatment to soften and re-harden them.
What are the limitations of EDM?
- The slow rate of material removal.
- The additional time and cost used for creating electrodes for Ram/Sink EDM.
- Reproducing sharp corners on the work piece is difficult due to electrode wear.
Why dielectric is used in EDM?
Dielectric is an important parameter in EDM and plays a crucial role in determining high material removal rate (MRR) and surface finish during operation . The dielectric fluid behave as a medium which controls the electrical discharge and absorb heat during process.
What is the principle of EDM?
5.2 Principles of the EDM process. EDM is a thermoelectric process used to remove metal via a series of discrete sparks between the metal and workpiece . In EDM an electric spark is used as the cutting tool to cut (erode) the workpiece and produce the finished part to the required shape.
What is the full form of EDM?
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What is spark gap in EDM?
Electrode gap (spark gap) is the distance between the electrode and the part during the process of EDM . ... This energy is created between a workpiece and an electrode submerged in a dielectric fluid with the passage of electric current.
What are the applications of EDM?
- Drilling for micro holes in the nozzle.
- This is used in thread cutting.
- Used in wire cutting.
- Rotary form cutting.
- Helical profile milling.
Can you EDM stainless steel?
CNC controlled cutting patterns can be completed quickly on a wide range of stainless steel alloys, while maintaining a low Ra surface roughness. ... EDM can cut material thickness from only a few thousandths of an inch to several inches.
Can wire EDM cut stainless steel?
Wire EDM Applications
Our wire EDM cutting can be applied to Aluminum, Brass, Bronze, Copper, Spring Steel, Stainless Steel, Steel and Titanium, which are super alloys and difficult metals to machine.
How do you conduct ceramic EDM?
To influence the electrical conductivity of insulating ceramics such as Al 2 O 3 , Si 3 N 4 and ZrO 2 , a secondary electrically conductive phase is incorporated into ceramics, which allows machining by EDM. A successful approach was achieved by Yoo et al. (2015) with the SiC ceramic reinforcement by yttrium nitrate (YN) .
What is not advantage of EDM?
Limitations of EDM
EDM requires an electrically conductive workpiece. It will not work on wood, plastics or composites . Material removal rates (MMR) are usually lower than for conventional processes. However, direct comparisons are difficult to make since material hardness is such a big factor.
What are the advantages and disadvantages of EDM?
- Tolerances of +/- 0.005 can be achieved.
- Material hardness does not effect process – Tungsten Carbide – Stellite – Hastelloy – Nitralloy – Waspaloy – Nimonic – Inconel all can be successfully machined by EDM.
- Cutting complex shapes and thin walled configurations without distortion.
How accurate is Wire EDM?
Accuracy and Tolerances
Wire EDM is extremely accurate . Many machines move in increments of 40 millionths of an inch (. 00004′′) (. 001 mm), some in 10 millionths of an inch (.
