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.| The PEM process |
The PEM process is an electrochemical cavity-sinking erosion process with vibrating electrodes and a regulated working gap. A pulsed direct current is applied between the electrode and the workpiece. The workpiece dissolves anodically in accordance with the geometry of the subsequent electrode. This gives rise to complex geometrical shapes in practically all metals, e.g. in highly-tempered steel, rolling bearing steel, powder-metallurgy steel and in super-alloys. PEM thereby also taps applications which could not be manufactured feasibly or at all in the past.
How you benefit: No process-related electrode wear! A single electrode can be used to produce practically any number of identical parts. No temperature increase in the material structure! No influence on material tempering. Micro-fractures can not arise. Extended service lives on the part of tools can be anticipated. No white coats! No workpiece reworking. High feed rates of up to 0.5 mm/min. independent of the cavity area. Electrode surface qualities are reproduced! Roughness of Ra to 0.05 µm as well as various degrees of roughness are possible on a single surface. Components are not subjected to mechanical loads! Relatively thin-walled structures can be processed. Magnetic characteristics of the workpieces are not influenced!
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