Method and expander for manufacturing a furnace heat exchanger a

Details Method and expander for manufacturing a furnace heat exchanger a Method and expander for manufacturing a furnace heat exchanger a

1988-09-01

1990-01-16

Moon, Charlie T.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

291575, 29512, 29523, 2924352, 72355, 72393, B21D 5300, B21K 2900, B23P 1526

Patent

active

048933902

ABSTRACT:
A furnace heat exchanger and support plate assembly are joined together by a cooperating substantially elliptical rim defining an opening in the heat exchanger and an opening formed by a mating flange on a partition plate and extending perpendicular to the plane of the plate. The flange and the partition plate is inserted in the opening in the heat exchanger unit and expanded radially outward with respect to the central longitudinal axis of the openings by a multiple jaw expander mechanism which is inserted through the opening in the plate into the interior of the heat exchanger. The expander includes radially and axially moveable jaws comprising plural jaw segments which are engaged by an axially moveable mandrel. The number of jaws in the expander is sufficient to form a substantially leakproof seal between the exchanger unit and the support plate assembly in a single expander operation through a single bending sequence.

REFERENCES:
patent: 2357123 (1944-08-01), Maxwell
patent: 2481628 (1949-09-01), Sherman
patent: 2654413 (1953-10-01), Weidel
patent: 3260097 (1966-07-01), Hilton
patent: 3385087 (1968-05-01), Huth
patent: 3757717 (1973-09-01), Bennett
patent: 3940837 (1976-03-01), Wiese
patent: 4416142 (1983-11-01), Thorne-Thomsen
patent: 4663837 (1987-05-01), Hoeffken
patent: 4706487 (1987-11-01), Bandou et al.

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