| 摘要 |
<p>Assembly (1, 1', 1") for forming a hollow metal body (2) comprising a precursor (4) having a substantially tubular wall (6), which extends about an axis (X) and delimits a body compartment (8), and a forming device (10, 10', 10"). Such device identifies one or more injection passageways (12, 12') of a pressurised liquid in the body compartment (8) to induce an expansion of the latter, and comprises a pair of half-moulds (14, 16), which jointly delimit a mould chamber (18) accommodating said precursor (4) and configured to contain plastic deformations of the tubular wall (6) following expansion. Such device comprises axial compression means (14, 16; 80, 80') of the precursor (4) to deform the tubular wall (6) radially externally and obtain the metal body (2).</p> |
