Patent US3612816A successfully refreshed from Google Patents.
US3612816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tack welding of sections
Assignee: JFE Engineering Corp
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Filing: 1970-08-06
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Granted: 1971-10-12
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Expires: 1990-08-06
Abstract
Abstract A method and apparatus for tack-welding sections in the form of plates where at least two plates are arranged with the edge of one plate engaging a face of the other to define therewith a pair of corners situated on opposite sides of the edge of the one plate. The plates are continuously fed in the direction of the latter edge while a pair of welding units are reciprocated along paths parallel to this edge. During the time that each welding unit moves in the same direction as the plates it is rendered operable to deposit a tack weld. The structure which reciprocates the pair of welding units maintains them at all times moving in opposed directions so that while one welding unit moves in the same direction as the plates from a given starting location to a given end location the other welding unit is returning from its end location back to its starting location. The speed with which each welding means is moved at least in the same direction as the plates is different from the speed of movement of the plates.
Inventors
- 👤 Masaaki Hano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:35
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/24; B23K9/28; B23K9/30; B23K9/0026
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
129 words
In a method of tack welding at least a pair of plates one of which has an edge engaging a face of the other plate to define at said face a pair of corners at opposite sides of the edge of said one plate, the steps of feeding said plates in the direction of said edge of said one plate at a given feed speed, simultaneously reciprocating at speeds different from said feed speed and along paths parallel to said edge of said one plate a pair of welding means for respectively depositing tack welds at said corners, and rendering each welding means operable to deposit a tack weld only during at least part of the time when each welding means moves in the same direction as said plates.
Claim 2
Dependent Claim
129 words
In a method of tack welding at least a pair of plates one of which has an edge engaging a face of the other plate to define at said face a pair of corners at opposite sides of the edge of said one plate, the steps of feeding said plates in the direction of said edge of said one plate at a given feed speed, simultaneously reciprocating at speeds different from said feed speed and along paths parallel to said edge of said one plate a pair of welding means for respectively depositing tack welds at said corners, and rendering each welding means operable to deposit a tack weld only during at least part of the time when each welding means moves in the same direction as said plates.
Claim 3
Dependent Claim
79 words
In a method as recited in claim 1, the reciprocation of said pair of welding means being carried out in a manner maintaining the pair of welding means in movement in opposite directions with one of the pair of welding means moving from a given starting location to a given end location in the direction of feed of the plates while the other welding means moves in a reverse direction from the end location back to the starting location.
Claim 4
Dependent Claim
15 words
In a method as recited in claim 2 and wherein the plates are continuously fed.
Claim 5
Dependent Claim
18 words
In a method as recited in claim 3 and wherein the pair of welding means are continuously reciprocated.
Claim 6
Dependent Claim
42 words
In a method as recited in claim 4 and wherein the pair of welding means are reciprocated at a speed slower than said given speed at least during the time when each welding means moves in the same direction as the plates.
Claim 7
Dependent Claim
48 words
In a method as recited in claim 5 and wherein said given feed speed for the plates is on the order of 6,000 mm./min. and said pair of welding means are each moved at least in the same direction as said plates at a speed of 5,000-5,500 mm./min.
Claim 8
Dependent Claim
150 words
In an apparatus for automatically tack welding at least a pair of plates one of which has an edge engaging a face of the other to define at said face a pair of corners on opposite sides of said edge, a pair of welding means respectively located adjacent said corners for depositing tack welds at said corners when the pair of welding means are rendered operable, feed means for feeding said plates in the direction of said edge of said one plate, a pair of reciprocating means Respectively connected operatively to said pair of welding means for respectively reciprocating the latter at speeds different from the feed speed of said plates along paths extending parallel to said edge, and means coacting with each welding means for rendering the latter operable only during at least part of the time when each welding means moves in the same direction as the plates.
Claim 9
Dependent Claim
150 words
In an apparatus for automatically tack welding at least a pair of plates one of which has an edge engaging a face of the other to define at said face a pair of corners on opposite sides of said edge, a pair of welding means respectively located adjacent said corners for depositing tack welds at said corners when the pair of welding means are rendered operable, feed means for feeding said plates in the direction of said edge of said one plate, a pair of reciprocating means Respectively connected operatively to said pair of welding means for respectively reciprocating the latter at speeds different from the feed speed of said plates along paths extending parallel to said edge, and means coacting with each welding means for rendering the latter operable only during at least part of the time when each welding means moves in the same direction as the plates.
Claim 10
Dependent Claim
62 words
The combination of claim 7 and wherein said pair of reciprocating means are respectively connected operatively with said pair of welding means for simultaneously reciprocating the latter in mutually opposed directions so that when one welding means moves in the same direction as said plates the other welding means moves in a direction opposite to the direction of movement of the plates.
Claim 11
Dependent Claim
43 words
The combination of claim 8 and wherein said pair of reciprocating means respectively reciprocate said pair of welding means between starting and end locations which are at the same points longitudinally along the path of movement of said plates for both welding means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-11 | 1975-04-12 | 1975-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-11 | 1979-04-12 | 1979-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-11 | 1983-04-12 | 1983-10-12 | $7700.00 | Window Closed / Lapsed |