Title:
POWER SUPPLY FOR ELECTRODISCHARGE MACHINING AND METHOD OF ELECTRODISCHARGE MACHINING
Document Type and Number:
WIPO Patent Application WO/2000/073007
Kind Code:
A1
Abstract:
A power supply (100) for electrodischarge machining supplies current pulses to a gap (3) between a tool electrode (1) and a workpiece (2). The power supply comprises a DC power supply (E); first switching elements (Tr1-Trn) connected between the DC power supply and the gap; capacitors (C1-C8) connected in parallel with the gap; a second switching element (67) for controlling the currents flowing from the capacitors to the gap; a detector (50) for detecting a start of electrical discharge; and a controller (20) for controlling the first switching element and the second switching element in response to the detector. Current flows from the direct current power supply to the gap through the first switching element for a first period ($g(t) ON) from a start of electrical discharge, and current flows from the capacitor to the gap through the second switching element for a second period (T) shorter than the first period from a start of electrical discharge.
Inventors:
KANEKO YUJI (JP)
SADAMITSU DAISUKE (JP)
GU ZHANBO (JP)
SADAMITSU DAISUKE (JP)
GU ZHANBO (JP)
Application Number:
PCT/JP2000/003538
Publication Date:
December 07, 2000
Filing Date:
June 01, 2000
Export Citation:
Assignee:
SODICK CO LTD (JP)
KANEKO YUJI (JP)
SADAMITSU DAISUKE (JP)
GU ZHANBO (JP)
KANEKO YUJI (JP)
SADAMITSU DAISUKE (JP)
GU ZHANBO (JP)
International Classes:
B23H1/02; (IPC1-7): B23H1/02
Foreign References:
| JPH06312316A | 1994-11-08 | |||
| JPH0679532A | 1994-03-22 |
Other References:
See also references of EP 1116541A4
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