Method and apparatus for manufacturing heat exchanger tube

Details Method and apparatus for manufacturing heat exchanger tube Method and apparatus for manufacturing heat exchanger tube

2006-08-08

2006-08-08

Jimenez, Marc (Department: 3726)

Metal working

Method of mechanical manufacture

Heat exchanger or boiler making

C029S413000, C029S417000

Reexamination Certificate

active

07086153

ABSTRACT:
Distortion of the cross-sectional shape of a tube when producing a heat exchanger tube by cutting a continuous tube is prevented by forming cutting grooves in a strip material in advance by an upper and bottom cutter. The two side edges of the strip shaped member where stress will concentrate in the next tube forming step, the parts strongly bent, etc. are made thick, while the parts forming the belly surfaces of the tubes are made thin. At least four rollers are divided into two groups and arranged in a zigzag configuration. The continuous tube receives bending force in the forward and reverse directions between the group of rollers and is easily broken at the cutting grooves.

REFERENCES:
patent: 2098989 (1937-11-01), Minter
patent: 2444463 (1948-07-01), Nordquist
patent: 2862292 (1958-12-01), Lawson
patent: 3072770 (1963-01-01), Goodridge
patent: 3124872 (1964-03-01), Knodel
patent: 4283824 (1981-08-01), Schatz et al.
patent: 5407116 (1995-04-01), Nishishita et al.
patent: 5495972 (1996-03-01), Nishishita et al.
patent: 2 203 677 (1988-10-01), None
patent: 2203677 (1988-10-01), None
patent: 63-264218 (1988-11-01), None
patent: 03-124337 (1991-05-01), None

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