초록 ▼

A method of making sandwich structures from a plurality of workpieces is disclosed. The method comprises providing a plurality of workpieces, each having principal opposed surfaces. The workpieces comprise first and second outer workpieces and at least two core workpieces. Each of the core workpiece

A method of making sandwich structures from a plurality of workpieces is disclosed. The method comprises providing a plurality of workpieces, each having principal opposed surfaces. The workpieces comprise first and second outer workpieces and at least two core workpieces. Each of the core workpieces have cutout portions defining at least one strip. The workpieces are treated at selected locations to inhibit joining at said locations. The treated workpieces are positioned in a stack contacting at their principal surfaces. The workpieces are joined, preferably by diffusion bonding, at their untreated contacting surfaces such that alternate longitudinal edges of superimposed strips are joined together and to the outer workpieces. Preferably, at least one chamber is enclosed by positioning the stacked workpieces relative to a plurality of shaping members. At least one of the outer workpieces is caused to expand into the at least one chamber and to form against the at least one shaping member causing the strips of the core workpieces to extend substantially vertically. If an even number of core assemblies are used the webs are vertical; and if an odd number are used they are at an angle to the cover workpieces. Preferably, the at least one expanded outer workpieces has an effective strain rate sensitivity and the expansion is accomplished superplastically.

대표청구항 ▼

A method of making sandwich structures from a plurality of workpieces comprising: providing at least four workpieces, each of said workpieces having two opposed principal surfaces, at least two of said workpieces being core workpieces, said core workpieces being substantially identical, said core wo

A method of making sandwich structures from a plurality of workpieces comprising: providing at least four workpieces, each of said workpieces having two opposed principal surfaces, at least two of said workpieces being core workpieces, said core workpieces being substantially identical, said core workpieces having portions thereof cutout such that a plurality of parallel strips and a frame portion are defined, said strips being surrounded by said frame portion, said strips being spaced from each other by said cutout portions, said strips being connected to said frame portion, said strips having two longitudinal edges and two lateral edges; treating selected areas of said workpieces to inhibit joining at said areas; positioning said workpieces in a stack contacting at their principal surfaces such that there are two outer workpieces which sandwich said core workpieces, said core workpieces being positioned such that said strips are in aligned rows; joining said stack of workpieces at the untreated areas with said strips being joined in respective rows and to the outer sheets along alternate longitudinal edges; and expanding the joined stack such that said strips form substantially vertically at the treated areas thereof.