Forming curved segments from metal plates

Details Forming curved segments from metal plates Forming curved segments from metal plates

1977-05-24

1978-10-17

Larson, Lowell A.

Metal deforming

With temperature modification of tool or of specified...

Cooling

148 124, 148130, B21D 1100

Patent

active

041201876

ABSTRACT:
A large flat metal plate is formed to have a three-dimensional shape of compound curvature by locally heating to an elevated temperature along predetermined lines and then quickly cooling, as by using a torch which carries a water spray nozzle. The heating extends completely through the thickness of the plate, and cooling causes significant shrinkage in the plane thereof in a direction perpendicular to the line of heating. Heating is carried out along lines in a geometric pattern and in a preselected sequence involving all quadrants of the plate so that it experiences a gradual transformation overall. The plate is normally supported upon an underlying cradle shaped to the desired compound curvature.

REFERENCES:
patent: 2428825 (1947-10-01), Arnoldy
patent: 3745805 (1973-07-01), Gauthier

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