Forming curved segments from metal plates

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

B - Operations, Transporting

21

D

153/44

B21D 5/00 (2006.01)

Patent

CA 1083937

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 sig- nificant shrinkage in the plane thereof in a direction perpendi- cular 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.

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