Method of fabricating box section from steel with walls that dif

Details Method of fabricating box section from steel with walls that dif Method of fabricating box section from steel with walls that dif

1990-06-29

1991-08-20

Larson, Lowell A.

Metal deforming

By use of roller or roller-like tool-element

With modification or control of temperature of work, tool or...

72364, 72367, 72377, 723426, 7234296, 72224, 2989731, 29DIG24, 29DIG32, B21B 112

Patent

active

050403990

ABSTRACT:
A method of fabricating box section from steel with walls of non-uniform thickness along its periphery. A starting product in the form of round tubing with a wall that is uniformly thick along its circumference is manufactured and rolled into box section with walls of uniform thickness along its periphery. A temperature difference is generated between the flange midsections and the web midsections of the box section with walls of uniform thickness along its periphery such that the flange midsections are at least 600.degree. C. hotter than the web midsections, the flanges are edged and thickened peripendicular to the longitudinal axis of the box section, with the edge length being shortened, by rollers, and the box section is finally cooled with air and/or water subject to standardization conditions.

REFERENCES:
patent: 368622 (1887-08-01), Sandford
patent: 1019968 (1912-03-01), Koenig
patent: 2085829 (1937-07-01), Rogers
patent: 2780000 (1957-02-01), Huet
patent: 4220277 (1980-09-01), Hesse et al.
patent: 4527411 (1985-07-01), Shinosaki et al.

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