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Title:
WELDING TORCH
Document Type and Number:
WIPO Patent Application WO/2017/150429
Kind Code:
A1
Abstract:
A welding torch 100 for arc welding in a shielding gas has a contact tip 25 for feeding a welding wire 13, a suction nozzle 23 for suctioning a gas from a space which surrounds the periphery of the welding wire and is formed between the welding wire and the suction nozzle 23, and a shielding gas feeding nozzle 21 for feeding the shielding gas to a welding part from a space which is provided on the external periphery of the suction nozzle 23 and formed between the suction nozzle 23 and the shielding gas feeding nozzle 21. The expressions 7 ≤ Ltk ≤ 17 and 0 ≤ Lts ≤ 18 are satisfied in the present invention, where Lts [mm] is the distance from a distal end of the contact tip 25 to a distal end of the shielding gas feeding nozzle 21 along the longitudinal direction of the welding wire, and Ltk [mm] is the distance from the distal end of the contact tip 25 to a distal end of the suction nozzle 23 along the longitudinal direction of the welding wire.

Inventors:
MUKAI NAOKI
SUZUKI REIICHI
MARUYAMA TOKUJI
Application Number:
PCT/JP2017/007420
Publication Date:
September 08, 2017
Filing Date:
February 27, 2017
Export Citation:
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Assignee:
KOBE STEEL LTD (JP)
International Classes:
B23K9/29
Foreign References:
JPS5711681U1982-01-21
JP2015037805A2015-02-26
JPS6213273A1987-01-22
JP2000312972A2000-11-14
JP2002506736A2002-03-05
Other References:
See also references of EP 3424634A4
Attorney, Agent or Firm:
SAMEJIMA, Mutsumi et al. (JP)
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