method for the manufacture of three-dimensional components to strutturacellulare consisting of two sheets of sheet metal, and related

摘要

A method for manufacturing three-dimensional, cellular structure components consisting of two metal sheets, comprising a starting step of separately pressing a first (22) and a second (23) metal sheet so that they assume respective three-dimensional shapes (R1, R2) compatible with each other, wherein at least one (23) of the sheets is provided along its surface with a cellular structure defining a plurality of depressions (26) and protrusions (27) reciprocally spaced and continuously distributed along the surface, and a successive step of joining the two previously pressed sheets (22, 23) together rigidly and permanently in a joining process, so as to constitute a cellular component (21) having a three-dimensional shape (R3). Preferably the cellular structure is produced at the same time as the three-dimensional shape (R2) by pressing the corresponding sheet (23), using the same mould. The method considerably extends the current possibilities of producing components made of two sheets, having a three-dimensional, even complex, shape together with good rigidity and at low cost, such as for example the engine bonnet (101) and other parts, external or internal, of a motor vehicle.