Metal working – Means to assemble or disassemble – Heat exchanger
Patent
1983-08-26
1986-02-25
Crane, Daniel C.
Metal working
Means to assemble or disassemble
Heat exchanger
29282, 291574, 29723, 72164, B23P 1900, B21D 304
Patent
active
045718210
ABSTRACT:
The hollow tubular member or blank which is to serve as a sleeve for a corroded tube of the steam generator of a nuclear reactor plant and which is too long to be manipulated under the tube sheet of the reactor, is prebent into a shape such that it can be manipulated and is then progressively straightened under the tube sheet as it is progressively inserted into the tube. The straightener includes a plurality of grooved rolls mounted staggered and rotatable in a train. Each roll forms a channel engaging half of the periphery of the member. The contour of the engaging surface of each roll is the same as the contour of the member over half of its peripheral surface so that each roll mates with the member over half of its peripheral surface. The rolls are in frictional engagement with the member and advance the member while bending it so that the material of the member is stressed beyond its elastic limit oppositely to the stress beyond the elastic limit, which produced the bending, sufficiently to straighten the hollow member.
REFERENCES:
patent: 2335028 (1943-11-01), Rose et al.
patent: 3116781 (1964-01-01), Rugelev et al.
patent: 3410126 (1968-11-01), Baker
patent: 4154077 (1979-05-01), Cotter
patent: 4201074 (1980-05-01), Cox
patent: 4286452 (1981-09-01), Schneider
patent: 4313793 (1982-02-01), Klumb et al.
patent: 4329769 (1982-05-01), Glatthorn
PCT/US82/00934, "Wire Straightener and Method for Straightening Wire", Labbe, R. A., 6/23/1983.
Pirl William E.
Vogeleer John P.
Crane Daniel C.
DePaul L. A.
Westinghouse Electric Corp.
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