Background and Basics of ECM
Machining by ion dissolution, an opportunity for polishing implants.
Electro Chemical Machining (ECM) is a well-know technique: the shape of an electrode is reproduced in the part by current action.
- But it was old
- Lack of precision; Insufficient surface finish
Concept and Solution: PECM
- Evolution in PECM (Precise Electro Chemical Machining)
- A vibrating electrode, with a regulated gap
- Pulsed current between the electrode and workpiece
- High reproduction accuracy, low Ra: 0.03 μm for CoCr
- No thermal impact, no micro-cracking or white coatings, no burrs.
- Machining speed from 0.05 to 1 mm/min
- Roughing, finishing and polishing in 1 operation with 1 electrode
Status and Outlook
Medical field of application: TA6V, CoCr, stainless steel
- CrCo: tibial base; cup; knee condyle; intervertebral discs
- Stainless steel: cup; femoral head
- TiAl6V4: cup; intervertebral discs
- Surgical instruments; rasps; capsule compression tooling for capsule; forging tools for prostheses...
- Cetim is a competence centre for technology transfer: evaluation of potentialities; feasibility study; possibilities of shared units
- Technology awareness: Dipl.-Ing. Jean-Marc Bélot; Cetim; 60300 Senlis; Frankreich; phone: +33 (0) 34467 3305; E-Mail: firstname.lastname@example.org
- Competence centre: Dipl.-Ing. Stéphane Guérin; Cetim; 42000 Saint-Etienne; Frankreich; phone: +33 (0) 47779 4019; E-Mail: email@example.com;
- Interreg: Dr.-Ing. Patrick Orlans; Cetim; 59700 Marcq-en-Baroeul; Frankreich; phone: +33 (0) 32099 4610; E-Mail: firstname.lastname@example.org; web: www.cetim.fr