What is the difference between EDM and Micro-EDM?
The significant difference between micro and macro EDM is the plasma channel radius (Diameter). In macro EDM the plasma size is larger by several orders of magnitude than the plasma channel radius. The size of the plasma can be changed by the pulse duration because the channel radius increases as the time increases.
What is Micro-EDM machining rate?
1 to 20 mm/min
Explanation: Machining rates used in Micro-EDM process range from 1 to 20 mm/min.
What does EDM stand for in machining?
Electrical discharge machining
Electrical discharge machining (EDM), also known as spark machining, spark eroding, die sinking, wire burning or wire erosion, is a metal fabrication process whereby a desired shape is obtained by using electrical discharges.
What materials can be machined by EDM?
Any conductive material such as steel, titanium, aluminium, brass, alloys and superalloys can be cut using the EDM wire method. With its accuracy, the EDM wire cut technique has become a convention cutting method in all industries. Machine parts, logos and other metals can be cut and made with ease using EDM wire.
What materials can be machined in EDM process?
What materials can be cut using EDM wire? Any conductive material such as steel, titanium, aluminium, brass, alloys and superalloys can be cut using the EDM wire method. With its accuracy, the EDM wire cut technique has become a convention cutting method in all industries.
What are the dielectric fluids commonly used in EDM?
Hence, considering above mentioned properties commonly used dielectric fluids in EDM are hydrocarbon oil, e.g., transformer oil, paraffin oil, kerosene; lubricating oil, gas, air and also deionized water.
What are the differences between ECM & EDM?
Both EDM and ECM are non-conventional machining methods; however, that one letter makes a big difference! EDM, or electrical discharge machining, relies on localized spark erosion to remove material, whereas ECM, or electrochemical machining, utilizes electrolysis to dissolve the metal locally.
Which material Cannot be machined by EDM?
Explanation: Wood is a bad conductor of electricity and hence cannot be machined using electronic discharge machine.
What type of tool we used in EDM?
Copper, copper-tungsten and brass are also extensively used as EDM tool material. Minimum tool wear condition can be obtained in EDM using graphite electrodes with frequency of about 3000 kHz, 30 A power supply. A coating of steel on graphite electrode tool is given to control the actual wear of graphite tool.
What are the advantages of ECM process?
Advantages of electrochemical machining:
- The rate of machining does not depend on the hardness of the work piece material.
- The tool does not wear.
- No stresses are produced on the work piece surface.
- No burrs form in the machining operation.
- High surface quality may be achieved.
- High accuracy of the machining operation.
What is ECM principle?
Electrochemical Machining (ECM) is based upon Faraday’s law of electrolysis. Faraday’s law states that the the mass of a metal altered by the electrode is proportional to the quantity of electrical charges transferred to that electrode.
How does ECM machining work?
Electrochemical machining is the opposite process to electrochemical or galvanic coating. In electrochemical machining, the workpiece is taken as the anode, and the tool is taken as the cathode. These are both placed in an electrolyte solution and an electrical current is passed through the solution between them.
What is the principle of ECM?
What is the basic 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 working system is illustrated in Fig. 2.1. The workpiece and tools are two electrodes connected by D.C pulse generator.
What is application of EDM?
Applications of Electrical Discharge Machining EDM is particularly famous in small-volume production, which makes several processes possible. These processes include milling, turning, small hole drilling, and more.
What are the advantages of EDM?
Advantages of EDM – Part Geometry / /
- Thin walls are possible.
- Cut internal corners with very small radii.
- Cut thin slots in extrusion dies with wire EDM.
- Produce blind and high aspect ratio pockets with sinking EDM.
- Produce non-round openings and cavities.
- An alternative to broaching for 2D shapes like gears.