US3585343A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for vertical welding of aluminum
Assignee: L-Tec Co
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Filing: 1970-05-21
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Granted: 1971-06-15
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Expires: 1990-05-21
Abstract
Abstract A method for vertical welding of aluminum wherein a cavity is formed between aluminum plates by placing graphite retaining members on the outside surface thereof. At least one consumable guide tube is placed in the cavity and a consumable wire is passed therethrough. A halogen base flux is fed into the cavity to shield the weld puddle and to provide a medium for resistance melting. Voltage is supplied to the wire from about 40 volts and 1300 amps to about 75 volts and 400 amps. When multiple guide tubes and wires are used, the wire is skewed prior to entry into the consumable guide tube and rotated as it emerges therethrough to ensure complete fusion.
Inventors
- 👤 Alfred B Crichton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:29
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/36; B23K35/3601; B23K35/3603; B23K25/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
149 words
A method for welding aluminum plates having a thickness of at least 1 inch which comprises: positioning said aluminum plates in spaced relation; positioning in the space between said plates at least one stationary consumable aluminum guide tube; placiNg graphite retaining members against the outside surfaces of said aluminum plates to form a cavity around said consumable aluminum guide tubes; passing a consumable aluminum wire through one end of the guide tube until it emerges at the other end thereof; striking an arc from the end of said consumable aluminum wire to form a weld puddle in said cavity; feeding a slag forming flux into said cavity to shield said weld puddle from the atmosphere and to provide a medium for resistance melting the plate, guide tubes and wire; progressively consuming said guide tube and wire in said weld puddle as said weld puddle raises in a vertical direction.
Claim 2
Independent Claim
149 words
A method for welding aluminum plates having a thickness of at least 1 inch which comprises: positioning said aluminum plates in spaced relation; positioning in the space between said plates at least one stationary consumable aluminum guide tube; placiNg graphite retaining members against the outside surfaces of said aluminum plates to form a cavity around said consumable aluminum guide tubes; passing a consumable aluminum wire through one end of the guide tube until it emerges at the other end thereof; striking an arc from the end of said consumable aluminum wire to form a weld puddle in said cavity; feeding a slag forming flux into said cavity to shield said weld puddle from the atmosphere and to provide a medium for resistance melting the plate, guide tubes and wire; progressively consuming said guide tube and wire in said weld puddle as said weld puddle raises in a vertical direction.
Claim 3
Dependent Claim
13 words
Method according to claim 1 wherein said flux consists essentially of halogen compounds.
Claim 4
Dependent Claim
46 words
Method according to claim 2 wherein said flux comprises of from about 35 to about 60 weight percent KCl; about 15 to about 35 weight percent NaCl; about 15 to about 30 weight percent NaAl3F6; and from a trace up to about 10 weight percent Lif.
Claim 5
Dependent Claim
28 words
Method according to claim 3 wherein said flux consists essentially of 45 weight percent KCl; 27 weight percent NaCl; 22 weight percent NaAl3F6 and 6 weight percent LiF.
Claim 6
Dependent Claim
37 words
Method according to claim 1 which includes skewing the consumable wire prior to its entry into the consumable guide tube and rotating the end of said skewed consumable wire as it emerges from the other end thereof.
Claim 7
Dependent Claim
21 words
Method according to claim 1 wherein the space between the plates is from 1 3/8 inches to about 1 5/8 inches.
Claim 8
Dependent Claim
29 words
Method according to claim 1 wherein said graphite retaining members are provided with a reinforcement groove having an area of about 0.25 sq. in. to about 0.80 sq. in.
References Cited (Backward Citations)
US2868951A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |