US 5,544,195 A · High-bandwidth continuous-flow arc furnace

Abstract

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.

Claims32

Dependent claims

A system for generating a continuous flow of molten metal comprising:

a metal mass;
a crucible having an orifice for containing said metal mass;
an electrode mounted adjacent said metal mass;
a power source for providing said electrode with current, said current forming an arc between said electrode and said metal mass, said arc heating said metal mass to a molten metal mass;
a pressurized gas source for providing gas under pressure to propel said molten metal mass through said orifice;
a metal feeder for providing metal at a rate to replenish said molten metal mass as the volume of said molten metal mass is diminished when said molten metal mass is propelled through said orifice;
and
a control system for controlling said electrode current, said gas pressure, and said metal feeder rate to provide a continuous stream of molten metal mass out said orifice.

5 more elements

Dependencies are inferred from the claim text.

High-bandwidth continuous-flow arc furnace

Life of this patent

High-bandwidth continuous-flow arc furnace

Life of this patent

Abstract

Claims32