Koninklijke Philips Corporation N.v.

Natalya Markelova

Nasich Zijatdinovich Gimaev

Rafail Ramzisovich Muchutdinov

Aleksandr Leonidovich Belogorsky

Maarten Brussee

Igor Leonidovich Agafonov

Viktor Nikolaevich Kucenko

Alexandr Nikolaevich Zajcev

Alexandr Zaitsev

Voctor Kutsenko

Nailya A Amirchanova

The invention relates to a method, an apparatus and a computer program for electrochemical machining where a removal of cathode depositions is performed in a fully automated way by means of an application of optimal pulses of a suitable polarity. The method comprises establishing an optimal pulse duration for pulses of the inverse polarity for a removal of the cathode depositions from an electrode surface during the electrochemical machining, said optimal pulse duration being determined from a first calibration carried out preceding the machining of the work piece and a second calibration carried out during the machining of the work piece; performing a control of the machining of the work piece by means of a monitoring of an actual value of an operational parameter and comparing said actual value of the operational parameter to a preset value of the operational parameter, applying a pulse of the inverse polarity of the optimal pulse duration in case the actual value of the operational parameter is greater than the preset value of the operational parameter. The operation of the apparatusin a machining mode is controlled by a process control means C. The operation of the apparatusin an electrode cleaning mode is controlled by the control system Carranged to remove the cathode depositions from the surface of the electrode in real time.

Method, an apparatus, a control system and a computer program to perform an automatic removal of cathode depositions during a bipolar electrochemical machining

A method for on-line removal of cathode depositions during electrochemical process. The process control unit ( ) is arranged to alternate the unipolar machining voltage pulses U with the voltage pulses of opposite polarity U to the work piece ( ) and the cathode ( ). The process control unit comprises an arrangement to determine the amount of cathode depositions on-line based on the operational parameter. Only in case the operational parameter exceeds the allowable level, the process control unit ( ) alternates the unipolar machining voltage pulses U with the voltage pulses of opposite polarity U In this case the cathode wear is minimized.

Method for a removal of cathode depositions by means of bipolar pulses

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Ufa, Russia

Natalya Markelova