Electric heating – Metal heating – By arc
Patent
1998-12-15
2000-04-11
Shaw, Clifford C.
Electric heating
Metal heating
By arc
228119, 228222, B23K 900
Patent
active
060490608
ABSTRACT:
An article is welded, as in weld repair of a defect, by positioning a weld lift-off block at a location on the surface of the article adjacent to the intended location of the end of the weldment on the surface of the article. The weld lift-off block has a wedge shape including a base contacting the surface of the article, and an upper face angled upwardly from the base from a base leading edge. A weld pool is formed on the surface of the article by directly heating the surface of the article using a heat source. The heat source is moved relative to the surface of the article and onto the upper surface of the weld lift-off block by crossing the leading edge of the wedge, without discontinuing the direct heating of the article by the heat source. The heating of the article with the heat source is discontinued only after the heat source is directly heating the upper face of the weld lift-off block, and not the article.
REFERENCES:
patent: 1512787 (1924-10-01), Morton
patent: 2649528 (1953-08-01), Koenig et al.
patent: 2682598 (1954-06-01), Macoy
patent: 4046988 (1977-09-01), Okuda et al.
patent: 4170473 (1979-10-01), Gerken
patent: 5897801 (1999-04-01), Smashey et al.
"Low Cycle Fatigue Properties of LPM.sup..TM. Wide-Gap Repairs in Inconel 738" by KA Ellison, J Liburdi, JT Stover, Superalloys 1996 pp. 763-771.
Boerger Eric J.
Borne Bruce L.
Smashey Russell W.
Snyder John H.
General Electric Company
Hess Andrew C.
Narciso David L.
Shaw Clifford C.
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