What is the process of EDM?
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. The workpiece is normally the anode and the tool is the cathode.
What is working principle of EDM?
Working principle: The principle of working of EDM is based on the erosion of the material by repetitive sparks between the workpiece and the tool submerged in a bath of the dielectric medium. The workpiece and electrode are separated by a gap to establish a pulsated spark across which the dielectric fluid flows.
How do you conduct EDM of ceramics explain in brief?
During the EDM process, a conductive tool electrode with the desired geometry is brought to close proximity of the workpiece by maintaining a small gap known as a spark gap. Both the workpiece and electrode, especially the spark gap zone of the electrode and the workpiece, are submerged in the dielectric fluid.
How does wire electrical discharge machining work?
Wire EDM machining works by creating an electrical discharge between the wire or the electrode and the work piece. As the spark jumps across the gap, material is then removed from the work piece and the electrode.
What is EDM explain briefly the process characteristics of EDM?
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 applications of EDM process?
The EDM process is most widely used by the mold-making, tool, and die industries, but is becoming a common method of making prototype and production parts, especially in the aerospace, automobile and electronics industries in which production quantities are relatively low.
What are the principal components of EDM process?
EDM system consists of four basic components tool electrode and work piece, pulsed power supply system, dielectric supply system and electrode feeding system which are shown in Fig.
What is machining in micro EDM process?
Microelectrical discharge machining (micro-EDM) is a thermal abrasion process which is based on electrical discharges between a tool and a workpiece. The advantages of micro-EDM are more and more in focus for ceramic machining.
How are EDM electrodes made?
The EDM process uses custom machined electrodes (typically made from graphite or copper) which creates a spark between the material being machined and the electrode. The spark erodes material in the EDM tools pathway, creating the complex cavities or shapes desired.
What are the functions of main elements of EDM process?
What are the commonly used electrode materials in EDM process?
Electrodes that are generally used in EDM process are copper, graphite, copper tungsten, silver tungsten, tungsten carbide, brass.
How does EDM machine work?
– Thick parts requiring good finishes and/or accuracies. – Complex shapes or narrow slots – Larger parts that need to hold accurate tolerances – Delicate, hard, exotic/expensive or weak materials
How does EDM machining work?
Wire EDM Machining is an electro thermal production process where a thin single-strand metal wire in conjunction with de-ionized water (used to conduct electricity) allows the wire to cut through metal by the use of heat from electrical sparks. Wire EDM is commonly used on hard metals which are often difficult to machine.
What is EDM machining?
Common Applications for EDM. Given the EDM’s complete disregard for the hardness of a metal,it’s most commonly used for creating hardened alloy tooling needed for other manufacturing processes –
What are normal tolerances on Wire EDM?
Your EDM-wire cut machine is sufficiently accurate and may give accuracy up to ± 0.0025 mm and a surface finish up to 1.5 µ Ra (with a multi-pass and specified parameters).