what is electrical discharge machining and how does it

Electrical Discharge Machining (EDM)

EDM is a process of thermal erosion through electrical discharges between an electrode and the material to be destroyed. EDM is also known as electrical discharge machining or EDM which is characterized as a non-traditional method of material extraction. There


The history of Electrical Discharge Machining (EDM) techniques go as far back as the 1770s when it was discovered by an English Scientist. However, Electrical Discharge Machining was not fully taken advantage of until 1943 when Russian scientists learned how the erosive effects of the technique could be controlled and used for machining purposes.

Electrical Discharge Machining (EDM)

Electrical Discharge Machining (EDM) Another great example of how technological advances have improved upon traditional machining processes is Electrical Discharge Machining (EDM). EDM enables you to remove material by immersing a part in water and to create a very high voltage between a piece of copper or graphite and the part so that sparks jump between them.

Electrical discharge machining

Electrical discharge machining is an excellent method to use in conjunction with a traditional machining method such as CNC machining when parts have specific geometrical requirements. Also, the ability of the process to machine hard materials make it an attractive option when working with materials like Inconel.

Electric Discharge

Electric discharge machining is a method of machining in which, as shown in Figure 1, when an electrode and a workpiece are brought closer to each other with pulse voltage being applied between them, dielectric breakdown occurring at a certain distance between them triggers discharge, whose high temperature and pressure in turn cause part of the workpiece to be melted and blown.

Learn About Shaft Currents (aka Electrically Induced

Electrically Induced Bearing Damage (EIBD) aka Shaft Currents aka Electrical Discharge Machining (EDM) Identification, Cause, Effect, Prevention, and Solutions Original article: 2002 with revisions up to February 13, 2020 Article by: Garrett Sandwell, MET, CVA, ASNT 3, VIBES Corp

LearnCNC Electrical Discharge Machining (EDM)

Electrical Discharge Machining or EDM is a type of machining that uses electricity to erode material away from a part. EDM is considered a non‐traditional machining method, meaning the material does not come off with a traditional chip, like it would with

Experimental study on green electrical discharge

2013/9/15Ti–6Al–4V is widely used in the aerospace, automobile, and biomedical fields, but is a difficult-to-machine material. Electrical discharge machining (EDM) is regarded as one of the most effective approaches to machining Ti–6Al–4V alloy, since it is a non-contact electro-thermal machining method, and it is independent from the mechanical properties of the processed material. This paper


The recovery interval then is the time period following the electrical machining discharge during which deionization of the discharge column, thermal recovery,and electrode cooling take place. If the gap does not recover sufficiently between any two discharges

An Investigation into Dimensional Accuracy Achievable in Wire

Abstract—Wire-cut electrical discharge machining (WEDM) is a popular choice for machining hard and difficult to machine materials with very close tolerances. However, the widely held assumption of the hi gh accuracy of WEDM needs to be investigated, which is

Pros and Cons of EDM: What is electrical discharge

2020/2/12Electrical discharge machining (EDM), also known as "spark" machining, is a technology that has been in existence for a long time. During the EDM process, an electrical current is directed Pros and Cons of EDM: What is electrical discharge machining, and how does it work? Read More

What Is Electrical Discharge Machining (EDM)?

Electrical discharge machining is a manufacturing process that changes the workpiece through eletrical discharges. Laser cutting isn't the method available for reshaping workpieces made of hard materials. Whether a workpiece is made of aluminum, steel or

Experimental study on green electrical discharge

2013/9/15Ti–6Al–4V is widely used in the aerospace, automobile, and biomedical fields, but is a difficult-to-machine material. Electrical discharge machining (EDM) is regarded as one of the most effective approaches to machining Ti–6Al–4V alloy, since it is a non-contact electro-thermal machining method, and it is independent from the mechanical properties of the processed material. This paper

Wire EDM Machining Services

Wire electrical discharge machining is a method of cutting metals, in which a traveling wire disintegrates material in a controlled manner. It uses an electrically charged thin brass wire, which is moved by computer control, close to, but not touching, the part to be cut.

I. 8. Discharge gap

Therefore, EDM discharge gap is about 0.005 - 1.0mm. Sparks do not occur in the condition that an electrode and work touch each other (i.e. discharge gap = 0), and the machining does not proceed. EDM moves an electrode up and down minutely depending on progress of the machining, and adjusts the electrode position to make the discharge gap suitable for sparking.

Differences Between Electrical Discharge Machining

Electrical discharge machining (EDM Machine) can be divided into two types: traditional conventional and wire cutting EDM machines. Conventional EDMs use a tool to transfer current from the cathode of the tool along with the sheet metal to the anode, and the current reacts to melt or vaporize the metal.

Electrical Discharge Machining : Principle, Working,

Electrical discharge machining process works on the basic principle of spark generation and metal removed by spark erosion. EDM spark erosion is same as electric spark which burn a small hole in a piece of metal through witch it contacts. The spark generated by

Electrical Discharge Machining

Fictiv offers two types of Electrical Discharge Machining (EDM) processes, which are useful for cutting deep pockets and complex features such as gears and holes with a keyway. EDM is also a non-contact machining method and does not exert cutting forces on the part, therefore it works particularly well for delicate structures.

How does an Electrical Discharge Machine work?

How does an EDM work? An EDM (or Electrical Discharge Machine) burns conductive metals by creating a spark erosion between a copper (or graphite) electrode which is electronically charged, and a workpiece which is not electronically charged. In general terms, a machinist will make an electrode which will be used as the "cutting piece" in


Wire electrical discharge machining has appeared mainly in response to the need for detachment with sufficiently high accuracy of parts of plate-type workpieces. The improvements introduced later allowed the extension of this machining technology to obtain more complex ruled surfaces with increasingly high requirements regarding the quality of the machined surfaces and the productivity of the

Machine tool

2020/8/17Machine tool - Machine tool - Electrical-discharge machining (EDM): EDM involves the direction of high-frequency electrical spark discharges from a graphite or soft metal tool, which serves as an electrode, to disintegrate electrically conductive materials such as hardened steel or carbide. The electrode and workpiece are immersed in a dielectric liquid, and a feed mechanism maintains a spark

What Is Electrical Discharge Machining (EDM)

The electrical discharge machine is a totally amazing and somewhat mysterious tool, without which, our modern way of life would be much different. As far as I can gather, two Russian scientists were doing experiments during WWII and came upon the EDM machining

Electrical Discharge Machining and Surface Alloying

Electrical discharge machining (EDM) is a thermal process that involves melting and vaporisation of the workpiece electrode. It is widely used in the aerospace, mouldmaking and die casting industries for manufacturing plastics moulds, forging dies and die casting dies made from hardened tool steels, together with engine components, such as compressor blades made from titanium alloys and nickel

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