Contactless and precisely metal parts are machined using the PECM process. Between a negatively polarised tool-electrode (cathode) and a positively polarised workpiece (anode) flows an electrically conductive electrolyte: salt water. It dissolves the ionized material anodically in the machining gap between electrode and workpiece. The electrode’s shape is projected inversely onto the metal. The precise pulse current synchronized with the oscillating tool electrode and the very small working gap are the basis for the precision of this technology. The PECM process is the further development of electrochemical lowering.
Using a precise pulse current and an oscillating tool electrode enables us to create the basis for a very small processing gap. This allows for high-precision and economic manufacturing without process-related tool wear. Workpieces can be created with a reproduction accuracy and reproducibility of 2-5 μm in an absolutely contactless fashion, all without chemical agents or mechanical forces.
Open the working gap, the fresh electrolyte is injected.
Close the working gap. The tool electrode (cathode) and workpiece (anode) approach up to a few micrometers. A controlled current pulse is triggered. In this moment the material is removed by anodising the surface.
Open working gap. The electrolyte with the removal material is flushed out of the working gap.
PEMTec has further developed the PECM technology into an industrial standard ready for series production and integrated it as a basis in its precision machines. We have created the word "Pemmen" to clearly describe and differentiate the technology.
PECM is highly precise and economical with the high imaging accuracy and speed of non-contact machining of superalloys and PM steels.
Pemmed parts already fly into space and back again today. Depending on the requirements or demands of the respective industry or sector, the technology is applied with a perfect fit. The machines developed in-house offer unique possibilities compared to conventional production techniques. From automotive to medical technology, workpieces are produced worldwide with PEMTec machines.