? Which of the following statements are true for Electro-Chemical Machining
(ECM)? 1) ECM is capable of machining metals and alloys irrespective of their
strength and hardness 2) No cutting forces are involved in ECM process 3)
ECM process consumes very high power 4) Very small space is required to set
up ECM process
Answers
Answer:
4 is correct
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Answer:
Statements 1, 2, and 3 are true for Electro-Chemical Machining (ECM).
Explanation:
The fundamental principle of electrochemical machining (ECM) is Faraday's law of electrolysis. According to Faraday's law, the number of electrical charges that are transmitted to an electrode cause the electrode to change the mass of metal. A high value of direct current around 40000A and a low value of potential difference around 10-25V are preferred in the electrochemical machining process. In the electrochemical process, the metal extracted from the workpiece forms a sludge that needs to be removed from the electrolyte. It consists of the piping system, storage tank, pump, control valve, pressure gauge, heating or cooling coil, etc. This technique can only be used to machine electric conductive materials. Metal can be machined regardless of the tool's strength or hardness.
Thus, the method of electrochemical machining is the opposite of electroplating. Metal is taken from the anode and placed in the electrolyte, where it reacts with the opposing ions to generate slag.