Non-consumable electrode welding torch and welding head with...

Details Non-consumable electrode welding torch and welding head with... Non-consumable electrode welding torch and welding head with...

2007-04-17

2007-04-17

Shaw, Clifford C. (Department: 1725)

Electric heating

Metal heating

Nonatmospheric environment at hot spot

C219S06000A, C219S125110

Reexamination Certificate

active

11225177

ABSTRACT:
An ultra-flat non-consumable electrode welding torch which allows performing a welding operation through a narrow gap between adjacent piping such as welding piping of a boiler panel, to be mounted on a compact automatic welding head, and a welding head provided with such a welding torch are to be provided. As a gas supply mechanism that supplies a shield gas to a welding section formed at the tip of the non-consumable electrode through inside of the torch body for the non-consumable electrode welding, a gas supply path is provided for supplying the shield gas from an outer gas space in a double ring shaped gas space provided around a non-consumable electrode and divided by a partition wall, to an inner gas space through a plurality of orifices provided at regular intervals in the partition wall, and the gas is blown from the inner gas space to the region around the non-consumable electrode through a metal mesh plate. A gas outlet opening provided in the inner gas space is oriented in a different direction from the gas blowing direction through the orifice.

REFERENCES:
patent: 4379215 (1983-04-01), Rohrberg
patent: 4769521 (1988-09-01), Sugiyama
patent: 5841089 (1998-11-01), Martinenas
patent: 2006/0076318 (2006-04-01), Watanabe et al.
patent: 9-271939 (1997-10-01), None
patent: 10-193103 (1998-07-01), None
patent: 2001-225165 (2001-08-01), None
English Language Abstract of JP 9-271939.
English Language Abstract of JP 10-193103.
English Language Abstract of JP 2001-225165.
U.S. Appl. No. 11/192,174 to Watanabe et al., filed on Jul. 29, 2005.

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