Method of and apparatus for fabrication of spiral fin

Details Method of and apparatus for fabrication of spiral fin Method of and apparatus for fabrication of spiral fin

1981-04-15

1984-02-07

Combs, E. Michael

Metal deforming

With use of control means energized in response to activator...

Including plural sensors or sensor responsive to comparison...

72136, 72142, 72205, 291573AH, B21D 1108, B21D 4300, B21C 3722, B23P 1526

Patent

active

044295588

ABSTRACT:
A method of and an apparatus for fabricating a spiral fin in which a strip of material is bent with rolling by a pair of rolls while being imparted with a tension to reduce the speed at which the strip is drawn between the pair of rolls to reduce a compressive force applied to a portion of the strip corresponding to an outer edge portion of the spiral fin, thereby improving the forming limit of the spiral fin.

REFERENCES:
patent: 1850886 (1932-03-01), Lane et al.
patent: 2262227 (1941-11-01), Fulson
patent: 3160195 (1964-12-01), Dobell
patent: 3177937 (1965-04-01), Slough
patent: 3216232 (1965-11-01), Stikeleather
patent: 3247696 (1966-04-01), Stikeleather
patent: 3926353 (1975-12-01), Gay
patent: 4033492 (1977-07-01), Imai
patent: 4079611 (1978-03-01), Osterkorn et al.
patent: 4199117 (1980-04-01), Muller et al.

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