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Questions and Answers
What are some examples of machining processes that fall under the Electro Thermal classification?
What are some examples of machining processes that fall under the Electro Thermal classification?
EDM (Electrical Discharge Machining), LBM (Laser Beam Machining), PAM (Plasma Arc Machining), and EBM (Electro Beam Machining)
What is the main energy source used in EDM (Electro Discharge Machining)?
What is the main energy source used in EDM (Electro Discharge Machining)?
Electric energy
How is the tool and the work piece connected in EDM?
How is the tool and the work piece connected in EDM?
The tool is connected to the (-) voltage as the cathode, while the work piece is connected to the (+) voltage as the anode.
What role does the dielectric fluid play in EDM?
What role does the dielectric fluid play in EDM?
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What are some advantages of EDM?
What are some advantages of EDM?
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What are some disadvantages of EDM?
What are some disadvantages of EDM?
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What are some common applications of EDM?
What are some common applications of EDM?
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Study Notes
Electro Thermal Machining Processes
- Electro Discharge Machining (EDM) is a common example.
- Wire EDM is a variation where a thin wire is used as the electrode.
- Laser Beam Machining (LBM) is another process where a laser beam is used to melt and vaporize material.
- Electron Beam Machining (EBM) uses high velocity electrons to melt and vaporize material.
EDM Energy Source
- Electrical energy is the main energy source in EDM. The spark generated by the high voltage discharge between the tool electrode and the workpiece material is the primary source of heat for material removal.
Tool and Workpiece Connection in EDM
- The tool electrode and workpiece are electrically isolated from each other and immersed in a dielectric fluid.
- This fluid acts as an insulator and a coolant.
Dielectric Fluid Role in EDM
- The dielectric fluid quenches the spark that is generated between the tool electrode and the workpiece.
- It also flushes away the ablated material to prevent clogging and ensure accurate machining.
Advantages of EDM
- High precision and accuracy in machining complex shapes and intricate details.
- Ability to cut any conductive material, regardless of its hardness or toughness.
- Minimizes heat affected zone and stress on the workpiece.
Disadvantages of EDM
- Relatively slow machining process compared to other methods.
- High cost and energy consumption.
- Tool wear can be significant.
EDM Applications
- Tool and die making
- Mold manufacturing
- Aerospace parts
- Medical implants
- Micromachining
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Description
Test your knowledge of different classifications of machining processes and examples of processes falling under the Electro Thermal classification. Learn about the main energy source used in EDM (Electro Discharge Machining) and expand your understanding of machining processes.
