US3882298A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for the submerged arc surfacing of metallic work pieces
Assignee: Gebrueder Boehler and Co AG
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Filing: 1973-04-13
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Granted: 1975-05-06
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Expires: 1993-04-13
Abstract
Abstract Method of and apparatus for the submerged arc surfacing of metallic work pieces with metal strips melting in an electric arc while forming welding beads of more than 75 mm in width. The strip electrode is connected to the pole of a direct-current source; during the melting process the electrode is accompanied by a stationary magnetic field. By means of such magnetic field in the region of the edge zones of the strip electrode the carriers of positive charges in the arc are deflected toward the direction of welding travel so as to slope outwards, said edge zones being approximately one-twentieth to one-fourth of the strip electrode width. By use of the invention the width of the surfacing layer is increased by 2 to 15 mm, as compared with the bead width obtained with apparatus in which no influence upon the arc is exerted by the magnetic field.
Inventors
- 👤 Franz Neff
- 👤 Hermann Ornig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:08
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/04; A; A01; A01N; A01N41/00; A01N41/02; A01N41/04; A01N41/06; B23K9/08
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
150 words
Apparatus for the submerged arc surfacing of metallic work pieces with metal electrode strips melting in an electric arc while forming welding beads of more tha 75 mm width, comprising a work piece, an electrode strip, means operative to move said electrode strip and work piece relative to each other, a direct current source, means for connecting to opposite poles of said source the electrode strip and the work piece, respectively, electromagnetic means producing a stationary magnetic field and having a pair of end faces of opposite polarity operatively mounted at opposite sides of electrode strip, means for adjusting the intensity of said electromagnetic means, said end faces of opposite polarity being arraNged in the edge zone of the melt-off edge of the strip electrode at equal distances from the center axis of the strip, the electromagnetic means being disposed at equal distances from the surface of the work piece.
Claim 2
Dependent Claim
150 words
Apparatus for the submerged arc surfacing of metallic work pieces with metal electrode strips melting in an electric arc while forming welding beads of more tha 75 mm width, comprising a work piece, an electrode strip, means operative to move said electrode strip and work piece relative to each other, a direct current source, means for connecting to opposite poles of said source the electrode strip and the work piece, respectively, electromagnetic means producing a stationary magnetic field and having a pair of end faces of opposite polarity operatively mounted at opposite sides of electrode strip, means for adjusting the intensity of said electromagnetic means, said end faces of opposite polarity being arraNged in the edge zone of the melt-off edge of the strip electrode at equal distances from the center axis of the strip, the electromagnetic means being disposed at equal distances from the surface of the work piece.
Claim 3
Dependent Claim
40 words
Apparatus according to claim 1, wherein the end faces of said electromagnetic means facing the surface of the work piece are in alignment with the strip electrode and wherein their axes substantially perpendicular to the work piece surface being clad.
Claim 4
Dependent Claim
36 words
Apparatus according to claim 2, wherein said electro-magnetic means are formed as a pair of magnetic cores and the end faces of the magnetic cores which face the work piece surface to be clad are hemispherical.
Claim 5
Dependent Claim
47 words
Apparatus according to claim 3, wherein the end faces of the magnetic cores which face the work piece surface to be clad are substantially V-shaped, the included angle thus formed being 20* to 90*, and the end faces of the magnetic cores are substantially in transverse alignment.
Claim 6
Dependent Claim
41 words
Apparatus according to claim 3, comprising means for adjusting the magnetic core ends facing the work piece surface to be clad with respect to their distances from the said work piece surface and from the center axis of the strip electrode.
Claim 7
Dependent Claim
31 words
Apparatus according to claim 3, comprising a U-shaped core part connecting the magnetic core ends, the U-shaped part encompassing the strip electrode, and a magnetic coil provided about the connecting part.
Claim 8
Dependent Claim
48 words
Apparatus according to claim 6, wherein the U-shaped connecting part is constructed as being multipart and adjustable, whereby to permit the adjustment of the distance of the magnetic cores from the surface of the work piece to be clad and from the center axis of the strip electrode.
References Cited (Backward Citations)
US3130294A
Cited
US3584181A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |