Method for closing a hydraulic, pneumatic and/or oleopneumatic cylinder and means for implementing thereof

Method for manufacturing a jack or hydraulic, pneumatic and/or oleopneumatic cylinder of the kind comprising an cylindrical tubular body (4) at the ends thereof a bottom (1) and a head (5) are fastened, inside thereof a piston (2) integral with a rod (3) slides, characterized in that in order to fasten in an irremovable way the head (5) and the bottom (1) to the tubular body (4) of the jack without threading and/or welding procedures, it provides implementing at the ends of the tubular body (4) a controlled plastic deformation extended to the whole thickness of the tubular body itself, apt to locally deform the ends thereof by generating on each of them at least a circumferential ring radially projecting inwards so as to insert in at least a specific groove (7) arranged, respectively, on the bottom (1) and on the head (5) inserted in the tube itself, so as to lock them in sito;

• said plastic deformation guaranteeing the mechanical seal of the coupling between tube (4) and bottom (1) and between tube (4) and head (5);
• said controlled plastic deformation being performed by rotating means which drive in rotation the tubular body (4) and the head (5) therein inserted.