US4366362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
All position TIG welding process
Assignee: IHI Corp
•
Filing: 1981-02-03
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Granted: 1982-12-28
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Expires: 2001-02-03
Abstract
Abstract In a TIG welding process with controlled welding current pulses, DC current pulses with the frequency set at from tens to hundreds Hz (most preferably from 30 to 300 Hz) are fed to an electrode and current pulses are also fed to a filler wire so that an arc is caused to swing, whereby a large pool of molten metal can be maintained in a positive and stable manner due to the high arc pressure obtained when the welding current pulses at from tens to hundreds Hz is used.
Inventors
- 👤 Ichiro Ohta
- 👤 Akio Tejima
- 👤 Masayuki Watando
- 👤 Akira Yamaoka
- 👤 Kouzi Ishiwata
- 👤 Minoru Yamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:01
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/09; B23K9/091; B23K9/16; B23K9/167
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
92 words
An all position TIG welding process which comprises during completion of a weld feeding DC current pulses of selected frequency to an electrode, feeding current pulses of the same frequency and of changing polarity to a filler wire and controlling the phase relationship between the electrode and filler wire pulses in a predetermined manner throughout formation of the weld to produce a controlled magnetic field whereby to cause the produced arc to swing under the influence of the field in predetermined amplitude and direction for each pass required to produce the weld.
Claim 2
Dependent Claim
92 words
An all position TIG welding process which comprises during completion of a weld feeding DC current pulses of selected frequency to an electrode, feeding current pulses of the same frequency and of changing polarity to a filler wire and controlling the phase relationship between the electrode and filler wire pulses in a predetermined manner throughout formation of the weld to produce a controlled magnetic field whereby to cause the produced arc to swing under the influence of the field in predetermined amplitude and direction for each pass required to produce the weld.
Claim 3
Dependent Claim
36 words
An all position TIG welding process as claimed in claim 1 wherein during at least some of the passes required to complete the weld said electrode and filler wire pulses are locked in synchronous phase relationship.
Claim 4
Dependent Claim
42 words
An all position TIG welding process as claimed in claims 1 or 2 including superimposing a bias current on said filler wire current pulses so that without changing the amplitude of said swing the forward or backward swing thereof may be controlled.
Claim 5
Dependent Claim
28 words
An all position TIG welding process as claimed in claim 1 or 2 wherein the frequency of said pulses is within the range of 30 to 300 Hz.
Claim 6
Dependent Claim
56 words
An all position TIG welding process as claimed in claim 1 including superimposing a bias current on said filler wire current pulses so that without changing the amplitude of said swing the forward or backward swing thereof may be controlled and wherein the frequency of said pulses is within the range of 30 to 300 Hz.
References Cited (Backward Citations)
SU238044A1
Cited
US3274371A
Cited
FR1520019A
Cited
US3838244A
Cited
US3627974A
Cited
US3777115A
Cited
US4019016A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-12-27 | 1986-06-28 | 1986-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-27 | 1990-06-28 | 1990-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-27 | 1994-06-28 | 1994-12-28 | $7700.00 | Window Closed / Lapsed |