Description
PEMTec is engaged around the world as an engineering company that specializes in precise electrochemical metalworking. With PEM Tec, precision becomes faster, more flexible and more economical. If PECM, then with PEMTec
After years of development work, we are proud to be able to claim for ourselves that PEMTec is one of the technology leaders for precise electrochemical metal processing. We coined the word “Pemming” to clearly describe and differentiate this PECM technology. Development and innovation are processes we continuously press ahead with to also be able to offer our clients this quality and top results in the future.
HOW THE PROCESS WORKS
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.
Step 1: Open the working gap, the fresh electrolyte is fed in to the working area.
Step 2: Close the working gap. Tool electrode (cathode) and workpiece (anode) approach each other to within a few micrometers. A controlled current pulse is triggered. At this moment, the material is anodically ablated on the surface.
Step 3: Open the working gap. The electrolyte is flushed out of the working gap with the ablation products.
PRECISION MAKES THE DIFFERENCE
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.
ADVANTAGES OF THE PECM PROCESS
In comparison with conventional manufacturing technologies, our internally developed machines offer unique possibilities. Our vision and the technology make PEMTec machines so unusual because precision makes all the difference.
- Precisely shaping almost all metals.
- Metal processing irrespective of material hardness.
- Processing of superalloys (inconel, Hastelloy etc) and PM steels.
- Short processing times.
- Inexpensive process for small batches, large serial manufacturing or prototyping.
- Dimensional accuracy within a series of products manufactured simultaneously.
PECM – BENEFITS OF THE PROCESS:
| ✔ Contactless processing | ✔ One workflow (roughing, finishing and polishing) |
| ✔ Simultaneous processing of macro/microstructures | ✔ Highly accurate reproduction and high surface quality |
| ✔ Deburring in the macro/micro range | ✔ Standard created surface quality up to Ra 0.03 µm |
| ✔ Totally burr-free | ✔ In the absence of thermal or mechanical strain, no structural changes in the workpiece |
| ✔ No reworking of workpieces (as no material adhesion and/or accumulation of deposits) | ✔ Highest stability without micro cracks |
For more information about the range of PEMTec machines, please email sales@finaids.com or contact your local branch.
