What is electrical discharge machining used for?
Electrical Discharge Machining (EDM) is a controlled metal-removal process that is used to remove metal by means of electric spark erosion. In this process an electric spark is used as the cutting tool to cut (erode) the workpiece to produce the finished part to the desired shape.
What are the two different types of electrical discharge machines?
Types of EDM Machines Electrical Discharge Machining can be divided into three common types: wire EDM, sinker EDM, and hole drilling EDM. EDM can be divided into three common types: wire EDM, sinker EDM, and hole drilling EDM.
What is EDM CNC?
CNC Wire EDM utilizes a fine, electrically charged metal wire usually made of brass, to cut through the work piece while submerged in a tank of deionized water. The moving wire erodes any conductive material that is within . 0005” of its path, while the deionized water cools and flushes away debris from the cut.
What is the working principle of electrical discharge machining process?
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.
What do you mean by electric discharge?
Definition. An electric discharge is the release and transmission of electricity in an applied electric field through a medium such as a gas.
What will happen if electrical discharge machining is done without any dielectric?
So basically, An EDM process must have a dielectric medium. Dielectric behaves as a channel between work and tool. If the dielectric is not present, it means there is no channel between work and tool. It is possible if we use machining inside the vacuum chamber but the tool wear will be high.
What are the types of electrical discharge machining?
What is the Electrical Discharge Machining (EDM) process?
- EDM is a non-traditional manufacturing process that uses thermal energy to remove material from a workpiece as opposed to mechanical force.
- Electric discharge machining can be divided into three common types, Die sinking EDM, Wire EDM and hole drilling EDM.
Which the following is true for electrical discharge machining EDM?
Which the following is true for Electrical Discharge machining (EDM)? Any electrical conductor can be machined by this method. Some light oil like transformer oil or kerosene oil is used as dielectric.
What is EDM finish?
An EDM surface finish (aka electrical discharge machining) is different to that produced by conventional machining. Cutting processes produce a finish with directionality. This is determined by the movement of the cutting tool. With EDM there is no “lay” and EDM finish quality can be mirror-like.
What is EDM fluid?
The dielectric fluid, or coolant, used in the wire electrical discharge machining (EDM) process, is deionized water. It acts as a semiconductor between the energized wire and the workpiece to maintain stable and controlled conditions for ionization in the spark gap.
Why flushing is essential in electro discharge machining?
Abstract—Flushing is a very important function in any electrical discharge machining (EDM) operation. It not only serves to remove the eroded debris from the spark-gap region but also has various other functions which highly influence the outcome of this machining pro- cess.
What is an example of electrical discharge?
Electric discharge denotes the excitation of atomic states in a gaseous medium on passing an electric current through the medium. An ordinary household fluorescent lamp is an example of an electric-discharge source.
How does an electrical discharge machining work?
How Electrical Discharge Machining Works. The basic electrical discharge machining process is really quite simple. An electrical spark is created between an electrode and a workpiece. The spark is visible evidence of the flow of electricity. This electric spark produces intense heat with temperatures reaching 8000 to 12000 degrees Celsius, melting almost anything.
How does an electrical discharge machine work?
The process of electrical discharge machining works by utilizing an electrical discharge or spark to create a product. This discharge is the result of two electrodes that are separated by a specialized fluid, known as a dielectric liquid, which is then subject to electrical current.
What is EDM cutting?
EDM (Electrical discharge machining) wire-cutting, wire burning, wire-cut EDM or wire erosion, is a process in which holes are cut out of materials with the use of electrical discharges.
How does EDM work?
How Wire EDM Works. Wire EDM machining (also known as “spark EDM”) works by creating an electrical discharge between the wire or electrode, & the workpiece. As the spark jumps across the gap, material is removed from both the workpiece & the electrode.