Welding torch with upper and lower shielding gas flow and welding method using welding torch for horizontal welding
AssigneeToyota Jidosha Kabushiki Kaisha
InventorYugo Yamaji
Life of this patent
Estimating the term…
Abstract
A welding torch (1) includes a cylindrical nozzle (2) in which shielding gas is flown from an opening (3b), and an electrode (4) that is a bar-shaped body projecting from the opening (3b). The shielding gas includes upper shielding gas flowing in an upper region (3u) on an upper side of a central axis (C2) of the electrode (4), and lower shielding gas flowing in a lower region (3d) on a lower side of the central axis (C2) of the electrode (4). Atmospheric pressure of the lower shielding gas is higher than atmospheric pressure of the upper shielding gas. A method of horizontal welding with this kind of welding torch is also defined.
Claims5
A welding torch for horizontal welding, comprising:
- a cylindrical nozzle, in which shielding gas is flown from an opening;
- and
- an electrode, which is a bar-shaped body projecting from the opening, wherein
- the cylindrical nozzle and the electrode are both oriented horizontally with respect to a gravitational direction during a welding operation,
- the shielding gas has upper shielding gas flowing in an upper region on an upper side of a central axis of the electrode with respect to the gravitational direction, and lower shielding gas flowing in a lower region on a lower side of the central axis of the electrode with respect to the gravitational direction, and
- atmospheric pressure of the lower shielding gas is higher than atmospheric pressure of the upper shielding gas thereby generating an upward force counteracting a sagging of weld metal during the horizontal welding, and
- the central axis of the electrode is an axis that is located above a central axis of the nozzle, and is parallel to the central axis of the nozzle.
A welding method, comprising:
- arranging a welding torch horizontally with respect to a gravitational direction;
- flowing shielding gas from an opening of the welding torch;
- and
- generating an electric arc between an electrode of the welding torch and a body to be welded to perform arc welding while the welding torch is arranged horizontally with respect to the gravitational direction, wherein
- the welding torch includes a cylindrical nozzle in which the shielding gas is flown out from the opening,
- the electrode is a bar-shaped body projecting from the opening,
- the shielding gas has upper shielding gas flowing in an upper region on an upper side of a central axis of the electrode with respect to the gravitational direction, and a lower shielding gas flowing in a lower region on a lower side of the central axis of the electrode with respect to the gravitational direction, and
- atmospheric pressure of the lower shielding gas is higher than atmospheric pressure of the upper shielding gas thereby qeneratinq an upward force counteracting a sagging of weld metal during the arc welding.
Dependencies are inferred from the claim text.