Title:
POWER SUPPLY APPARATUS FOR DIE-SINKING ELECTRIC DISCHARGE
Document Type and Number:
WIPO Patent Application WO/2010/098424
Kind Code:
A1
Abstract:
A power supply apparatus for a die-sinking electric discharge comprises a DC power supply (12), a current sensor (14) which detects a gap current (Igap), a first switching element (16) directly connected between the DC supply source and a tool electrode (2), a first reverse-blocking diode (22) which is connected in parallel to the DC supply source and directly to the first switching element, a second switching element (18) which is connected directly between the DC supply source and a workpiece (3), a second reverse-blocking diode (24) which is connected in parallel to the DC supply source and directly to the second switching element, and a pulse controller (20) which controls the first and second switching elements in accordance with the gap current (Igap). Both the first and second switching elements are turned ON between a first time (t1) at which the discharge occurs in the machining gap and a second time (t2) at which the gap current reaches a peak current during discharge, and only one of the first and second switching elements is turned OFF at the second time.
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| JP2003165031 | WIRE ELECTRIC DISCHARGE MACHINING DEVICE |
| JPS6311220 | ELECTRIC DISCHARGE MACHINE |
| WO/1994/003299 | METHOD AND APPARATUS FOR ELECTRICAL DISCHARGE MACHINING |
Inventors:
YAMADA KUNIHARU (JP)
YANAGISAWA TOMOYUKI (JP)
YANAGISAWA TOMOYUKI (JP)
Application Number:
PCT/JP2010/053035
Publication Date:
September 02, 2010
Filing Date:
February 26, 2010
Export Citation:
Assignee:
SODICK CO LTD (JP)
YAMADA KUNIHARU (JP)
YANAGISAWA TOMOYUKI (JP)
YAMADA KUNIHARU (JP)
YANAGISAWA TOMOYUKI (JP)
International Classes:
B23H1/02
Foreign References:
| JP2003181724A | 2003-07-02 | |||
| JP2007044813A | 2007-02-22 | |||
| JPS62287911A | 1987-12-14 |
Other References:
See also references of EP 2402101A4
None
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