Power supply for electrodischarge machining comprises control means

A power supply unit for electrodischarge machining applies voltage of positive and negative polarities across a gap between an electrode and a workpiece. The power supply comprises control means that applies first voltage pulses across the gap for a period (T1), waits a period (t) after the period (...

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Bibliographic Details
Main Authors SATOU SEIJI, UKAI YOSHIKAZU
Format Patent
LanguageEnglish
German
Published 15.09.2005
Edition7
Subjects
MACHINE TOOLS
METAL-WORKING NOT OTHERWISE PROVIDED FOR
PERFORMING OPERATIONS
SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
TRANSPORTING
WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OFELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKESTHE PLACE OF A TOOL
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Summary:A power supply unit for electrodischarge machining applies voltage of positive and negative polarities across a gap between an electrode and a workpiece. The power supply comprises control means that applies first voltage pulses across the gap for a period (T1), waits a period (t) after the period (T1) so as to prevent switching means from damage, and applies second voltage pulses of the polarity opposite to the first voltage pulses for a period (T2a) until the voltage across the gap reaches a predetermined voltage below the voltage (Va) at which a discharge begins. Since the remaining voltage across the gap is thus removed quickly, steady and quality machining can be carried out.
Bibliography:Application Number: CH20010000201