Apparatus for forming slit fin coils

Details Apparatus for forming slit fin coils Apparatus for forming slit fin coils

1985-01-10

1987-07-28

Spruill, R. L.

Metal deforming

By relatively movable offset tool-faces

With tool motion in fixed path

72216, 72217, 72218, 72219, B21D 907

Patent

active

046824880

ABSTRACT:
A slit fin heat exchanger is formed by wrapping slit fin tubing into a flat coil having two spaced rows of tubing. The flat coil is located on mandrels which are rotatable about spaced parallel axes with the mandrels and axes initially being in the same plane. The mandrels are rotated about their axes in opposite directions which shifts the plane in which the coil is located. The shifting of the plane of the coil moves a portion of a first row of the coil into contact with a planar portion of a platen and the second row of the coil into a nesting relationship with the portion of the first row which is in contact with the planar portion of the platen. Continued rotation of the mandrels causes folding of the portions of the coil which extends the area of nesting. The folding takes place through up to 120.degree. and the ends of the first row of the coil contacts a portion of the platen causing the formation of a knob at the end of each coil.

REFERENCES:
patent: 1903436 (1933-04-01), Brown
patent: 2477910 (1949-08-01), Tal
patent: 2497500 (1950-02-01), Hightower et al.
patent: 2497622 (1950-02-01), Mueller
patent: 2986194 (1961-05-01), De Marco
patent: 3209570 (1965-10-01), Hills
patent: 3561248 (1971-02-01), Bessho
patent: 4141235 (1979-02-01), Ishihara
patent: 4513596 (1985-04-01), Usher

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