Title:
METHOD AND APPARATUS FOR PULSED DISCHARGE FORMING OF A DISH FROM A PLANAR PLATE
Document Type and Number:
WIPO Patent Application WO1999033590
Kind Code:
A3
Abstract:
An apparatus for forming a generally planar metal plate into a dish with a three-dimensional pattern is provided. The apparatus comprises a mold having a forming surface with a contour corresponding to said three-dimensional pattern, and having edges corresponding to boundaries of the dish, which edges are defined by side walls essentially perpendicular to the forming plane; a forming device comprising a fluid basin and pairs of electric discharge members within the fluid and having an opening facing the mold to allow transmission of a pressure wave from the fluid to the metal plate; and an electric discharge circuitry for discharging a short and intense electric current through the pairs of electric discharge members generating an electric spark or breakdown within the fluid to yield formation of plasma, vapor or both.
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Inventors:
GAFRI OREN (IL)
LIVSHIZ YURI (IL)
LIVSHIZ YURI (IL)
Application Number:
PCT/IL1998/000628
Publication Date:
September 16, 1999
Filing Date:
December 29, 1998
Export Citation:
Assignee:
PULSAR WELDING LTD (IL)
GAFRI OREN (IL)
LIVSHIZ YURI (IL)
GAFRI OREN (IL)
LIVSHIZ YURI (IL)
International Classes:
B21D26/12; (IPC1-7): B21D26/12
Foreign References:
| US3228222A | 1966-01-11 | |||
| US3358487A | 1967-12-19 | |||
| FR2570303A1 | 1986-03-21 | |||
| US3188844A | 1965-06-15 |
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