Complex shapes of panels often have to be produced in several pieces and welded together. This usually leads to higher production costs and may complicate the dimensional control of the composite product. The object of the present invention is to provide a method of using aluminum hard magnesium alloy sheets at relatively high production rates with metal pressing and annealing to produce single-piece products whose molded shape includes deformation regions that exceed the initial stresses of the starting material.

A method of forming a compressed configuration in a working curable aluminum alloy is performed such that the sheet is drawn and / or stretched by a punching tool that closes in accordance with the complementary surface of the metal stamping tool. The punching tool used to mold the metal sheet typically has convex or projecting surfaces.

And the opposite surface of the metal punching tool has complementary concave or valley regions into which the aluminum metal must be stretched to achieve the desired shape. The method is useful where the configured configuration required includes areas of elongated and deformed metal that would be torn or otherwise damaged if the sheet was stretched to form a local shape in one closure of unheated metal stamping tools.

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