Electro Chemical machining Technology
ElectroChemical machining (ECM)
ElectroChemical machinin Development history
- ECM (ElectroChemical machining) is a type of non-traditional manufacturing processing.
- It was proposed by Gusseff in 1929, being applied to the industry from 1950 to 1960 and widely used in the aerospace industry.
- In the beginning, the problem of ECM technology was the dimensional accuracy and the discharge of polluted wastewater, which led to slow development.
- From 1980 to 1990, micro-electrochemical machining of pulse power supply with passivated oxygen-containing electrolyte was developed, and the processing error ranged in 0.2~0.05 mm and the surface roughness was 2~0.4 μm.
- From 1998 to 2011, the development of bipolar pulse power supply with vibrating electrode cutting tools can achieve a small range of machining accuracy (0.001~0.005 mm), and the surface roughness of the workpiece can reach Ra= 0.1~0.01 μm.
The Principle of Electrochemistry:
Electrochemical reaction is a chemical reaction that adjusted the electron energy on the surface of the electrode by electric potential to cause electron transfer between the electroactive substance and the electrode. The amount of electrochemical reaction can determine the processing efficiency in the electrochemical process according to Faraday’s law.
The Method of Electrochemical Process: the electrode, also called cutting tools, is used as the cathode, and the workpiece is the anode. The electrolyte and voltage are supplied between the cutting tool and workpiece to generate electric energy and chemical energy effects, and the redox reaction is obtained, thereby making the processing mechanism for metal material removal.
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