Search International and National Patent Collections

1. (WO2017150429) WELDING TORCH

Pub. No.:    WO/2017/150429    International Application No.:    PCT/JP2017/007420
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Tue Feb 28 00:59:59 CET 2017
IPC: B23K 9/29
Applicants: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
株式会社神戸製鋼所
Inventors: MUKAI, Naoki
迎井 直樹
SUZUKI, Reiichi
鈴木 励一
MARUYAMA, Tokuji
丸山 徳治
Title: WELDING TORCH
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.