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Title: High-bandwidth continuous-flow arc furnace

A high-bandwidth continuous-flow arc furnace for stream welding applications includes a metal mass contained in a crucible having an orifice. A power source charges an electrode for generating an arc between the electrode and the mass. The arc heats the metal mass to a molten state. A pressurized gas source propels the molten metal mass through the crucible orifice in a continuous stream. As the metal is ejected, a metal feeder replenishes the molten metal bath. A control system regulates the electrode current, shielding gas pressure, and metal source to provide a continuous flow of molten metal at the crucible orifice. Independent control over the electrode current and shield gas pressure decouples the metal flow temperature and the molten metal flow rate, improving control over resultant weld characteristics.
Inventors:
 [1];  [2]
  1. (Concord, MA)
  2. (Ann Arbor, MI)
Issue Date:
OSTI Identifier:
870548
Assignee:
Massachusetts Institute of Technology (Cambridge, MA) CHO
Patent Number(s):
US 5544195
Contract Number:
FG02-85ER13331
Research Org:
Massachusetts Institute of Technology (Cambridge, MA)
Country of Publication:
United States
Language:
English
Subject:
high-bandwidth; continuous-flow; furnace; stream; welding; applications; metal; mass; contained; crucible; orifice; power; source; charges; electrode; generating; heats; molten; pressurized; gas; propels; continuous; ejected; feeder; replenishes; bath; control; regulates; current; shielding; pressure; provide; flow; independent; shield; decouples; temperature; rate; improving; resultant; weld; characteristics; continuous stream; metal flow; electrode current; continuous flow; power source; molten metal; flow rate; gas pressure; pressurized gas; gas source; metal source; shielding gas; independent control; flow temperature; metal feed; high-bandwidth continuous-flow; /373/

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