What is electrical discharge machining process?
Electrical discharge machining (EDM) is a non-traditional machining process based on removing material from a part by means of a series of repeated electrical discharges between tools, called electrodes, and the part being machined in the presence of a dielectric fluid.
What are the differences between ECM & EDM?
Both EDM and ECM are non-conventional machining methods; however, both processes have considerable differences. 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.
What are the two different types of electrical discharge machines?
The Two Main Types of EDM Machines
- Conventional EDM Machines. Conventional EDM also goes by several other names, such as sinker EDM, die sinking, cavity-type EDM, volume EDM and ram EDM.
- Wire EDM Machines. Wire EDM, also known as spark EDM, wire burning and wire erosion, uses a thin heated wire as an electrode.
What is EDM application?
Applications of EDM : Used in automobile industry for drilling small holes in fuel injection nozzle. • Used for re-sharpening of cutting tools. • Used for producing internal threads.
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.
What are the disadvantages of ECM?
Disadvantages of ECM:
- Materials which are non-conductors of electricity cannot be machined.
- Power consumption is very high.
- Corrosion and rusting of workpiece, machine tool, fixtures etc.
- Required initial cost is very high.
- Extermely fine corner radii, say less than 2.0 mm cannot be produced.
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 the 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.
What is working principle of EDM?
Electrical discharge machining (EDM) is a process of removing material by exposing it to reoccurring controlled electric discharge. It works on the thermo-electrical phenomenon. As the electric discharge takes place between an electrode/wire and workpiece, the thermal energy is generated on a workpiece.
What is CNC EDM machine?
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 materials can be machined by EDM?
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.
Why do we use electric discharge machining?
Electrical discharge machining (EDM) is a commonly used manufacturing process for creating slots, eyelets, grooves and cut-offs in processed parts. Because EDM does not require high cutting force, it creates very low residual stresses, making it a powerful tool for manufacturing medical parts.
What are the advantages of ECM?
Benefits of ECM
- Keep Track of All Your Information. While having a large quantity of critical information may be necessary and desirable, it can often lead to problems.
- Reduce Operating Costs.
- Save Time.
- Improve Customer Service.
- Minimize Risk.
- Document Version Control.
How does ECM process 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 are the main components of EDM machine?
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.
Is EDM the same as CNC?
EDM is a manufacturing and prototyping process for metal parts. An EDM machine is similar in construction to a CNC machine, with the important distinction that EDM uses electrical discharges (sparks) to cut through the metal material instead of a sharp cutting tool.
Is EDM faster than machining?
EDM is Slow Then you have the EDM process, which has slower metal removal rates than milling. Not only is the EDM process slower, but you still need to use a CNC machine to mill one or more electrodes before you can use the EDM machine. In addition, milling graphite electrodes creates a lot of dust.
What is the difference between EDM and wire EDM?
The wire-cut EDM machine is operated by a CNC control instrument that can control the wire on a three-dimensional axis for greater flexibility. Conventional EDM cannot produce narrower angles or more complex patterns, while wire-cut EDM can be performed. A more precise cutting process allows for more complex cuts.
What are the advantages and disadvantages of ECM?
Advantages and disadvantages 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.
What are the process parameters of EDM?
Important process parameters of EDM are current, voltage and pulse on time. In the present work current, voltage and pulse on time were varied to study the effect of variation in these parameters on material removal rate. MRR increases nonlinearly with the increases in voltage.