Voxel has developed a Pulsed Electrochemical Machining (PECM) process that enables unique geometries, faster machining times, and better tolerances than competing manufacturing technologies.
About Pulsed Electrochemical Machining
PECM is a non-contact, unconventional machining process based on the principles of electrolysis. The machining operation involves a tool (the cathode) in the inverse shape of the desired workpiece (the anode). As the tool is moved towards the workpiece surface, a pulsed DC current is applied and an electrolyte is pumped between the cathode and anode at high speed. The pulsating DC power supply allows for high precision and superior surface quality while the electrolyte removes dissolved metal and heat. As the tool moves towards the workpiece, the workpiece is machined into the complementary shape of the tool. The result is an operation capable of producing a burr-free 3D shape with no tool wear in alloys that are difficult or impossible to machine through traditional methods.
Single-step processing with PECM means
no deburring, grinding, or finishing operations are required.
Benefits of PECM
No recast layer, no heat-affected zones
Ability to machine thin walls and microstructures
High quality surface finish below 0.1um Ra
High repeatability , no tool wear
Burr-free 3D shape produced in a single step
High material removal rates
Materials
PECM is capable of machining any conductive metal or alloy. It is particularly well suited for those materials that are difficult to machine through conventional methods. Commonly machined materials include nickel, iron, and titanium based alloys in raw formats including cast (including single crystal), forged, additively manufactured, and powdered metallurgy.
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How It Works
Step 1
Cathode and anode are set-up and electrolyte is pumped between the two parts.
Step 2
As the two pieces move together a pulsed DC current is applied.
Step 3
The flowing electrolyte removes heat and waste products from the gap.
Step 4
The anode workpiece is then machined into the complimentary shape of the cathode tool.