Question

Which of the machining processes uses the principle of Faraday’s law for material removal?

• A. EDM
• B. LBM
• C. ECM
• D. EBM

Hint:

In ECM, the material removal process is driven by the electrochemical reaction based on Faraday's law of electrolysis. It is a non-thermal process suitable for machining hard and complex materials.

Answer 1

The Correct Option is C

The machining process that uses the principle of Faraday's law for material removal is Electrochemical Machining (ECM). ECM works on the principle of electrolysis, where the material removal is due to the electrochemical reaction. According to Faraday’s law, when an electric current passes through a conductive fluid (electrolyte), material is removed from the workpiece by ionization. The workpiece and tool form an electrolytic cell, where the current causes the dissolution of the workpiece material.
In ECM:
- The anode (workpiece) undergoes dissolution in the electrolyte.
- The cathode (tool) remains unaffected.
- The material is removed based on the current flow and electrolyte properties, in compliance with Faraday’s law of electrolysis.
Other processes:
- EDM (Electrical Discharge Machining) works on the principle of electrical discharge between an electrode and the workpiece, not Faraday’s law.
- LBM (Laser Beam Machining) uses a focused laser to melt or vaporize material, not an electrochemical process.
- EBM (Electron Beam Machining) uses focused electron beams to heat and vaporize the material, not an electrochemical method.
Thus, the correct answer is ECM, as it directly involves Faraday's law for material removal.