Electric heating – Metal heating – By arc
Patent
1974-12-17
1977-07-05
Truhe, J. V.
Electric heating
Metal heating
By arc
291568R, B23K 1500
Patent
active
040341828
ABSTRACT:
Separate segments, oversized to allow for shrinkage during welding, are assembled in the shape of a ring. The segments may be plates carrying the guide vanes. The assembled ring is placed in a vacuum chamber and the joints between segments welded by an electron beam. The welding may be carried out in two steps, namely, first tack welding the segments together followed by finish welding the entire length of each joint. The segments may be held during welding in a fixture comprising a circular array of radially-slidable jaw elements which carry the separate segments. A clamping ring urges the jaw elements, and hence the segments, radially inwardly, and a cover plate engages the separate segments and urges them radially inwardly so as to clamp the segments together in a ring shape.
REFERENCES:
patent: 2345918 (1944-04-01), Dahlstrand
patent: 2392281 (1946-01-01), Allen
patent: 2450493 (1948-10-01), Strub
patent: 2454580 (1948-11-01), Thielemann
patent: 2579583 (1951-12-01), Johnson
patent: 3609841 (1971-10-01), Telfer et al.
patent: 3617685 (1971-11-01), Edwards et al.
patent: 3705971 (1972-12-01), Jacovides et al.
J. Lyman, Ed., Metals Handbook, 8th ed., vol. 6, 1971, pp. 540, 550, 551.
Berger Horst
Schlosser Werner
Levine Alan H.
Motoren- und Turbinen-Union Munchen GmbH
Shaw Clifford C.
Truhe J. V.
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