PEM Process Advantages
- A high-precision shaping process, suitable for virtually any metal
- Simultaneous machining of both macrostructures and microstructures
- High standard of surface finish — close tolerance reproduction capability (2 – 5 µm)
- Contact-free machining
- Process doesn’t cause any electrode wear
- Metals can be machined regardless of material hardness
- Surface finishes of Ra ±0.05µm or better achieved as standard (dependent on the process, material, and electrode selected).
- Short processing times: feed rates between 0.1 and 3 mm/min
- Suitable for all manufacturing volumes: mass production, batch quantities and prototyping
- Absolutely burr-free
- Virtually unlimited choice of conductive electrode material, dependent on the quantity of parts to be produced.
- Consistent dimensional accuracy in series production
- Process generates no thermal or mechanical stresses – producing NO change to material microstructure
- A profitable and highly efficient process
- No microcracks = excellent corrosion resistance achieved
- No white layers
- Components can be roughed, finished and polished in a single operation
- Suitable for machining superalloys (inconel, hastelloy, etc.), powdered metal and titanium alloys
Precise Electrochemical Machining (PEM) is a powerful metal shaping process, ideal for simultaneously creating complex macro- and micro-structures in extremely hard or exotic materials which are difficult to machine with conventional methods — like superalloys (Inconel, Hastelloy), powdered metal, and titanium alloys.
A non-contact process, PEM uses electric current and an oscillating tool in a conductive electrolyte (salt water) to dissolve metal by liquefication. A positively charged workpiece (the anode) takes the form of the negatively charged tool (the cathode). The result is a burr-free part without thermal or mechanical stresses, microcracks, white layers or electrode wear.
Step-by-step: How does the PEM process work?