# US 11,298,772 B2 · Welding apparatus and nozzle device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,298,772 B2 - Document ID: US11298772B2 - Status: Granted - Kind: B2 - Application number: 16/562,718 - Filed: 2019-09-06 - Published: 2020-03-26 - Granted: 2022-04-12 - Earliest claimed: 2018-09-26 - Assignees: Kabushiki Kaisha Toshiba; Toshiba Energy Systems & Solutions Corporation - Applicants: Kabushiki Kaisha Toshiba; Toshiba Energy Systems & Solutions Corporation - Inventors: Takahiro Terada; Yasuaki Hadame; Hideki Ide - Web page: https://patentgrep.com/patent/US11298772B2 ## CPC - B23K 9/16: making use of shielding gas - B23K 26/1462: {Nozzles; Features related to nozzles} - B23K 26/142: for the removal of by-products - B23K 26/1464: {Supply to, or discharge from, nozzles of media, e.g. gas, powder, wire} - B23K 26/348: in combination with arc heating, e.g. tungsten inert gas [TIG], metal inert gas [MIG] or plasma welding - B23K: SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM ## Abstract A welding apparatus according to one embodiment includes an irradiation device and nozzle. The irradiation device irradiates a surface of an object with an energy beam. The nozzle is provided with a first channel through which a shield gas flows and a second channel apart from the first channel and through which a gas flows, and the nozzle moves in an irradiation direction. The nozzle includes an end facing the surface and an outer face connected to the end and located in the irradiation direction with respect to the first channel. The end is provided with a first opening that communicates with the first channel and allows discharge of the shield gas toward the surface. The outer face is provided with a second opening that communicates with the second channel and allows the gas to be discharged away from the outer face in the irradiation direction. ## Claims ### Claim 1 A welding apparatus, comprising: an irradiation device that irradiates a surface of an object with an energy beam; and a nozzle that: is provided with a first channel through which a shield gas flows, and a second channel being apart from the first channel, through which a gas flows, is spaced from an irradiation position of the energy beam on the surface, moves relative to the object in an irradiation direction toward the irradiation position along the surface, and supplies the shield gas to the irradiation position, wherein the nozzle includes an end facing the surface, and an outer face connected to the end and located between the energy beam and the first channel, the nozzle is provided at the end with a first opening that communicates with the first channel and from which the shield gas is discharged toward the surface, the nozzle is provided with a second opening in the outer face, the second opening that communicates with the second channel and that allows the gas to be discharged away from the outer face in the irradiation direction, and the second channel includes: a first part into which the gas flows; a second part that communicates with the second opening; and a third part that connects the first part and the second part at a position closer to the end than at least part of the second opening. ### Claim 2 (depends on 1) The welding apparatus according to claim 1, wherein the gas is identical to the shield gas. ### Claim 3 (depends on 1) The welding apparatus according to claim 1, further comprising: a first regulator that regulates an inflow of the shield gas to the first channel; and a second regulator that regulates an inflow of the gas to the second channel. ### Claim 4 (depends on 1) The welding apparatus according to claim 1, wherein the second opening includes a first hole and a second hole that is spaced further from the end than the first hole, and the first hole is larger in size than the second hole. ### Claim 5 (depends on 1) The welding apparatus according to claim 1, wherein the second opening allows discharge of the gas in a direction parallel to the surface or away from the surface. ### Claim 6 (depends on 1) The welding apparatus according to claim 1, wherein the outer face has a protruded shape in the irradiation direction. ### Claim 7 (depends on 1) The welding apparatus according to claim 1, wherein the second opening includes a plurality of holes, and the holes increases in density toward the end. ### Claim 8 (depends on 1) The welding apparatus according to claim 1, further comprising a suction device that is spaced apart from the irradiation position in the irradiation direction and that suctions the gas. ### Claim 9 A welding apparatus, comprising: an irradiation device that irradiates a surface of an object with an energy beam; and a nozzle that: is provided with a first channel through which a shield gas flows, and a second channel being apart from the first channel, through which a gas flows, is spaced from an irradiation position of the energy beam on the surface, moves relative to the object in an irradiation direction toward the irradiation position along the surface, and supplies the shield gas to the irradiation position, wherein the nozzle includes an end facing the surface, and an outer face connected to the end and located between the energy beam and the first channel, the nozzle is provided at the end with a first opening that communicates with the first channel and from which the shield gas is discharged toward the surface, the nozzle is provided with a second opening in the outer face, the second opening that communicates with the second channel and that allows the gas to be discharged away from the outer face in the irradiation direction, the second opening includes a plurality of holes, and the holes increases in density toward the end. ### Claim 10 (depends on 9) The welding apparatus according to claim 9, wherein the gas is identical to the shield gas. ### Claim 11 (depends on 9) The welding apparatus according to claim 9, further comprising: a first regulator that regulates an inflow of the shield gas to the first channel; and a second regulator that regulates an inflow of the gas to the second channel. ### Claim 12 (depends on 9) The welding apparatus according to claim 9, wherein the second opening includes a first hole and a second hole that is spaced further from the end than the first hole, and the first hole is larger in size than the second hole. ### Claim 13 (depends on 9) The welding apparatus according to claim 9, wherein the second opening allows discharge of the gas in a direction parallel to the surface or away from the surface. ### Claim 14 (depends on 9) The welding apparatus according to claim 9, wherein the outer face has a protruded shape in the irradiation direction. ### Claim 15 (depends on 9) The welding apparatus according to claim 9, further comprising a suction device that is spaced apart from the irradiation position in the irradiation direction and that suctions the gas.