Global Patent Index - EP 0968322 A1

EP 0968322 A1 2000-01-05 - METHOD AND DEVICE FOR OPERATING MILLING BATHS

Title (en)

METHOD AND DEVICE FOR OPERATING MILLING BATHS

Title (de)

VERFAHREN UND VORRICHTUNG ZUM BETREIBEN VON FRÄSBÄDERN

Title (fr)

PROCEDE ET DISPOSITIF POUR L'EXPLOITATION DE BAINS DE FRAISAGE

Publication

EP 0968322 A1 (DE)

Application

EP 98916915 A

Priority

  • DE 19710563 A
  • EP 9801388 W

Abstract (en)

[origin: DE19710563A1] The invention concerns a method of operating a milling bath (10) wherein a metal workpiece to be milled is immersed in a milling bath (10) containing a milling medium, the metal oxidizing owing to a chemical reaction between the metal and milling medium and being transformed into a soluble complex. The resultant mixture is subjected to a separation process which separates the excess milling medium from the complex, the recovered milling medium being used for the further operation of milling baths and the complex being subjected to a preparation process. According to the invention, a mixture of dissolved complexed metallic ions and milling medium is removed from the milling bath at a concentration of dissolved complexed metallic ions which is far below the saturation limit thereof. The separation process is a nanofiltration process in which the milling medium is separated from the mixture according to the principle of reverse osmosis, the residue simultaneously being concentrated with complexed metallic ions.

IPC 1-7

C23F 1/46

IPC 8 full level

C23F 1/46 (2006.01)

CPC

C23F 1/46 (2013.01)

Citation (search report)

See references of WO 9841672A1

DCS

DE ES FR GB IE IT NL SE

DOCDB simple family

DE 19710563 A1 19980917; DE 19710563 C2 20031002; EP 0968322 A1 20000105; EP 0968322 B1 20031210; US 6454958 B1 20020924; WO 9841672 A1 19980924