US 12,269,120 B2
Gas assistance device for laser welding and laser welding system
Yuan Liu, Suzhou (CN); Zekai Hou, Suzhou (CN); and Franz Lehleuter, Suzhou (CN)
Assigned to TRUMPF (CHINA) CO., LTD., Taicang (CN)
Filed by TRUMPF (China) Co., Ltd., Suzhou (CN)
Filed on Jul. 22, 2024, as Appl. No. 18/779,113.
Application 18/779,113 is a continuation of application No. PCT/CN2024/072471, filed on Jan. 16, 2024.
Claims priority of application No. 202310062941.7 (CN), filed on Jan. 20, 2023.
Prior Publication US 2024/0375217 A1, Nov. 14, 2024
Int. Cl. B23K 26/12 (2014.01); B23K 26/21 (2014.01)
CPC B23K 26/127 (2013.01) [B23K 26/21 (2015.10)] 20 Claims
OG exemplary drawing
 
1. A gas assistance device for laser welding, the gas assistance device comprising:
an assistance gas unit configured to apply an assistance gas to a site to be welded, wherein the assistance gas unit is provided with an assistance gas nozzle; and
a fume suction unit configured to suck fumes generated during laser welding, wherein the fume suction unit is provided with a fume suction port,
wherein the assistance gas nozzle comprises a first slit-shaped opening, the fume suction port comprises a second slit-shaped opening, the fume suction unit is at least partially attached to the assistance gas unit, and in an operating state of the gas assistance device, the second slit-shaped opening is at least partially located above the first slit-shaped opening, and
wherein the assistance gas unit is at least partially configured as an outer ring structure, the fume suction unit is at least partially configured as an inner ring structure, and the inner ring structure is embedded within the outer ring structure.