US20220063012 TIG WELDING TORCH EQUIPPED WITH NARROW NOZZLE FOR SPOT WELDING, AND ELECTRODE NOZZLE USED IN SAME

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United States of America

Application Number 17413284

Application Date 23.12.2019

Publication Number 20220063012

Publication Date 03.03.2022

Publication Kind A1

IPC

CPC

Applicants MURATA WELDING LABORATORIES, INCORPORATED

Inventors Akihisa MURATA
Tadasuke MURATA
Manabu TANAKA

Priority Data 2018-241404 25.12.2018 JP

Title

(EN) TIG WELDING TORCH EQUIPPED WITH NARROW NOZZLE FOR SPOT WELDING, AND ELECTRODE NOZZLE USED IN SAME

Abstract

(EN)

The present invention enables even a beginner to acquire the technique easily and perform suitable spot welding, and achieves improved workability, improved welding quality, improved productivity, and the like. The present invention includes a torch body 2 for passing a shielding gas, a tungsten electrode rod 5 inserted into the torch body 2 and connected to a cathode, a constricted nozzle 6 for supporting a distal end portion of the tungsten electrode rod 5 concentrically, defining a gas passage 6e between the tungsten electrode rod 5 and the constricted nozzle 6 for flowing a shielding gas G, and discharging the shielding gas G from the constricted nozzle 6 at a higher speed than the shielding gas G discharged from the distal end of the torch body 2, and a cylindrical electrode nozzle 7 having conductivity arranged concentrically with the tungsten electrode rod 5 on the outer circumference of the constricted nozzle 6, connected to the anode via a ground cable 18, and configured to have a tapered shape at a distal end portion, wherein the tapered distal end portion is located further outside than the distal end portion of the tungsten electrode rod 5, gas vent ports 7c and 7d of the shielding gas G are provided on the electrode nozzle 7.

B	PERFORMING OPERATIONS; TRANSPORTING
23	MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
K	SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
9	Arc welding or cutting
24	Features related to electrodes
28	Supporting devices for electrodes
29	Supporting devices adapted for making use of shielding means

B	PERFORMING OPERATIONS; TRANSPORTING
23	MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
K	SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
9	Arc welding or cutting
16	making use of shielding gas

B	PERFORMING OPERATIONS; TRANSPORTING
23	MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
K	SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
9	Arc welding or cutting
16	making use of shielding gas
167	and of a non-consumable electrode

B	PERFORMING OPERATIONS; TRANSPORTING
23	MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
K	SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
9	Arc welding or cutting
24	Features related to electrodes
28	Supporting devices for electrodes
29	Supporting devices adapted for making use of shielding means

B	PERFORMING OPERATIONS; TRANSPORTING
23	MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
K	SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
9	Arc welding or cutting
16	making use of shielding gas

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1. US20220063012 - TIG WELDING TORCH EQUIPPED WITH NARROW NOZZLE FOR SPOT WELDING, AND ELECTRODE NOZZLE USED IN SAME