Patent US4502532A successfully refreshed from Google Patents.
Patent US3795785A successfully refreshed from Google Patents.
US3795785A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Successive automatic deposition of generally horizontal contiguous weld beads upon non-planar surfaces
Assignee: Teledyne Inc
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Filing: 1972-11-17
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Granted: 1974-03-05
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Expires: 1992-11-17
Abstract
Abstract Apparatus and method for automatic arc welding deposition of generally horizontal weld beads upon non-planar surfaces and more specifically upon the interior surface of the housing for a dredge pump, the apparatus including a rotatable, radially extensible horizontal boom mounted on a vertical shaft, weld metal depositing means mounted on an outboard end of the boom, means for rotating and for controlling the boom extension during rotation to automatically regulate conformance of the weld metal depositing means to the interior surface of the housing and means for controlling the rotational speed of the boom so that as the boom extends the speed of movement of the weld metal depositing means relative to the interior surface of the housing remains approximately constant during well bead deposition.
Inventors
- 👤 E Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:23
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/12; B23K9/02; B23K9/028
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
179 words
In apparatus for the successive automatic arc welding deposition of generally horizontal weld beads upon the interior surface of a housing for a dredge pump or the like while the housing is lying on its side, the apparatus being of the type which includes a. a rotatable, radially extensible horizontal boom mounted on a vertical shaft, the boom extending substantially perpendicular to the shaft, b. weld metal depositing means mounted on an outboard end of the boom, c. means for rotating the boom about the shaft axis whereby to move the weld metal depositing means in a horizontal path over the interior surface of the housing, and d. means for controlling the boom extension during rotation to automatically regulate conformance of the weld metal depositing means to the interior surface of the housing, the improvement which comprises e. means for automatically controlling the rotational speed of the boom so that as the boom extends the speed of movement of the weld metal depositing means relative to the interior surface of the housing remains approximately constant during weld bead deposition.
Claim 2
Dependent Claim
179 words
In apparatus for the successive automatic arc welding deposition of generally horizontal weld beads upon the interior surface of a housing for a dredge pump or the like while the housing is lying on its side, the apparatus being of the type which includes a. a rotatable, radially extensible horizontal boom mounted on a vertical shaft, the boom extending substantially perpendicular to the shaft, b. weld metal depositing means mounted on an outboard end of the boom, c. means for rotating the boom about the shaft axis whereby to move the weld metal depositing means in a horizontal path over the interior surface of the housing, and d. means for controlling the boom extension during rotation to automatically regulate conformance of the weld metal depositing means to the interior surface of the housing, the improvement which comprises e. means for automatically controlling the rotational speed of the boom so that as the boom extends the speed of movement of the weld metal depositing means relative to the interior surface of the housing remains approximately constant during weld bead deposition.
Claim 3
Dependent Claim
14 words
Apparatus as claimed in claim 1 wherein means d comprise cam and follower means.
Claim 4
Dependent Claim
224 words
In apparatus for the successive automatic arc welding deposition of generally horizontal weld beads between predetermined points upon the interior surface of a housing for a dredge pump or the like while the housing is lying on its side, the apparatus being of the type which includes a. a rotatable, radially extensible horizontal boom mounted on a vertical shaft, the boom extending substantially perpendicular to the shaft, b. weld metal depositing means mounted on an outboard end of the boom, c. means for rotating the boom about the shaft axis whereby to move the weld metal depositing means in a horizontal path over the interior surface of the housing, d. means for controlling the boom extension during rotation to automatically regulate conformance of the weld metal depositing means to the interior surface of the housing, e. means for automatically reversing the direction of welding after the weld metal depositing means have completed a weld pass at either of the predetermined points, and f. means for automatically repositioning the weld metal depositing means at each weld direction reversal point, the improvement which comprises g. means for automatically controlling the rotational speed of the boom so that as the boom extends the speed of movement of the weld metal depositing means relative to the interior surface of the housing remains approximately constant during weld bead deposition.
Claim 5
Dependent Claim
224 words
In apparatus for the successive automatic arc welding deposition of generally horizontal weld beads between predetermined points upon the interior surface of a housing for a dredge pump or the like while the housing is lying on its side, the apparatus being of the type which includes a. a rotatable, radially extensible horizontal boom mounted on a vertical shaft, the boom extending substantially perpendicular to the shaft, b. weld metal depositing means mounted on an outboard end of the boom, c. means for rotating the boom about the shaft axis whereby to move the weld metal depositing means in a horizontal path over the interior surface of the housing, d. means for controlling the boom extension during rotation to automatically regulate conformance of the weld metal depositing means to the interior surface of the housing, e. means for automatically reversing the direction of welding after the weld metal depositing means have completed a weld pass at either of the predetermined points, and f. means for automatically repositioning the weld metal depositing means at each weld direction reversal point, the improvement which comprises g. means for automatically controlling the rotational speed of the boom so that as the boom extends the speed of movement of the weld metal depositing means relative to the interior surface of the housing remains approximately constant during weld bead deposition.
Claim 6
Dependent Claim
40 words
Apparatus as claimed in claim 3 further including timing means for automatically discontinuing weld deposition and delaying movement of the boom, both for a predetermined period of time, at either of the predetermined points whereby weld puddle runout is decreased.
Claim 7
Dependent Claim
14 words
Apparatus as claimed in claim 4 wherein means d comprise cam and follower means.
Claim 8
Dependent Claim
119 words
Apparatus as claimed in claim 3, further including h. means for automatically discontinuing weld deposition at either of the predetermined points while continuing movement of the weld metal depositing means in a first horizontal direction, i. timing means for delaying reversal of the weld metal depositing means for a predetermined time after the weld metal depositing means have travelled past the point of discontinuance of weld deposition, and j. means for automatically resuming weld deposition when the weld metal depositing means pass the point of discontinuance of weld deposition moving in the opposite direction from the first horizontal direction, means h, i and j in combination constituting means to reduce weld puddle runout at either of the predetermined points.
Claim 9
Dependent Claim
14 words
Apparatus as claimed in claim 6 wherein means d comprise cam and follower means.
Claim 10
Dependent Claim
52 words
Apparatus as claimed in claim 3 wherein means c comprise a reversible variable speed electric motor and means g comprise means connected to the speed control of the motor and responsive to the boom position for automatically causing the motor speed to decrease with boom extension and to increase with boom retraction.
Claim 11
Independent Claim
233 words
A method of applying generally horizontal weld beads upon the interior surface of a housing for a dredge pump or the like, which housing has a circular side opening, comprising a. positioning the housing on its side so that the side opening is at the top or bottom thereof, b. positioning a rotatable radially extensible horizontal boom within the housing with its center of rotation approximately at the center of the circular side opening of the housing, c. mounting weld metal depositing means on an outboard end of the boom, d. rotating the boom to move the weld metal depositing means in a horizontal path over the interior surface of the housing, e. controlling the relationship between boom rotational position and boom extension so that during rotation the end of the boom carrying the weld metal depositing means is maintained approximately a constant distance from the interior surface of the housing, f. feeding consumable welding wire through the weld metal depositing means, g. establishing an arc between the end of the welding wire and the interior surface of the housing to deposit weld metal in a horizontal path, and h. controlling rotational speed of the boom so that as the boom extends its rotational speed automatically decreases at a rate sufficient to maintain approximately constant the speed of movement of the weld metal depositing means relative to the interior surface of the housing.
Claim 12
Independent Claim
233 words
A method of applying generally horizontal weld beads upon the interior surface of a housing for a dredge pump or the like, which housing has a circular side opening, comprising a. positioning the housing on its side so that the side opening is at the top or bottom thereof, b. positioning a rotatable radially extensible horizontal boom within the housing with its center of rotation approximately at the center of the circular side opening of the housing, c. mounting weld metal depositing means on an outboard end of the boom, d. rotating the boom to move the weld metal depositing means in a horizontal path over the interior surface of the housing, e. controlling the relationship between boom rotational position and boom extension so that during rotation the end of the boom carrying the weld metal depositing means is maintained approximately a constant distance from the interior surface of the housing, f. feeding consumable welding wire through the weld metal depositing means, g. establishing an arc between the end of the welding wire and the interior surface of the housing to deposit weld metal in a horizontal path, and h. controlling rotational speed of the boom so that as the boom extends its rotational speed automatically decreases at a rate sufficient to maintain approximately constant the speed of movement of the weld metal depositing means relative to the interior surface of the housing.
Claim 13
Dependent Claim
102 words
A method as claimed in claim 9 wherein step e comprises forming a cam plate whose changes in distance between cam face and boom rotation point closely approximate the corresponding changes in distance between the dredge housing interior and the boom rotation point, attaching a cam follower to the horizontal boom and positioning the cam so that the cam follower conforms to the cam face and causes radial extension or retraction of the boom during boom rotation, such radial extension or retraction serving to maintain approximately constant the distance between the weld metal depositing means and the interior surface of the housing.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |