Comparison With Mechanical Forming
Electromagnetic forming has a number of advantages and disadvantages compared to conventional mechanical forming techniques.
Some of the advantages are;
- Improved formability (the amount of stretch available without tearing)
- Wrinkling can be greatly suppressed
- Forming can be combined with joining and assembling with dissimilar components including glass, plastic, composites and other metals.
- Close tolerances are possible as springback can be significantly reduced.
- Single sided dies are sufficient which can reduce tooling costs
- Lubricants are reduced or are unnecessary, so forming can be used in clean room conditions
- Mechanical contact with the workpiece is not required, this avoids surface contamination and tooling marks. As a result, a surface finish can be applied to the workpiece before forming.
The principle disadvantages are;
- Non conductive materials cannot be formed directly, but can be formed using a conductive drive plate
- The high voltages and currents involved require careful safety considerations
- Large sheet metal components cannot readily be formed, due to current limitations on the design of very large coils
Read more about this topic: Electromagnetic Forming
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