Principle

PECM （Precise electrochemicalmachining） refers to the precision electrolysis process. As weknow, a electrolysis system consists of DC power supply, cathode, anode andelectrolyte. As to PECM, the workpiece acts as the anode，and the toolacts as the cathode. When the gap been filled of electrolyte between anode andcathode becomes small enough, the phenomenon of electrochemical dissolutionwill occur at the surface of anode because of metal atoms lose electrons and get intoelectrolyte. In this case, the workpiece can be gradually shaped , and thecathode remains unchanged. The material of workpiece can be removed by electrochemicalmachining regardless of its hardness or mechanical properties.

Process Advantages

Almost all conductive metal materials can be machined
The repetition precision of workpiece profile is high
Workpiece surface finish is up to Ra0.05（Depend on the materia l）
Non-contact processing lead to no thermal and mechanical stress, no change of the surface structure
No effect on the intercrystalline structure and mechanical character .
Hardness, toughness and magnetic qualities of the material remain unchanged.
Not affected by material rigidity, Small and thin-walled metallic structural parts can be machined.
Not affected by the hardness of the material, the heat - treated or viscous metal materials can be machined
Cathode wears hardly at all (no tool cost), mass production can be carried out.
Roughing, finishing and polishing can be done in a single step.
Rough-machining, finish-machining and polishing in a single operation
High efficiency, feed rate maybe from 0.1mm/min to 6mm/min.
multiple pieces can be machined at a time, and the efficiency multipled.
The components without burrs, free from secondary processing, such as deburring or polishing.
Electrolyte is a neutral salt solution, used indefinitely by filtration without discharge.